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From dmi...@apache.org
Subject cvs commit: jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/model/dom DOMAttributePointer.java
Date Wed, 08 May 2002 00:40:00 GMT
dmitri      02/05/07 17:40:00

  Modified:    jxpath/src/java/org/apache/commons/jxpath/ri/compiler
                        VariableReference.java TreeCompiler.java Step.java
                        Path.java Operation.java LocationPath.java
                        ExtensionFunction.java ExpressionPath.java
                        Expression.java CoreOperation.java
                        CoreFunction.java Constant.java
               jxpath/src/java/org/apache/commons/jxpath/ri/axes
                        SimplePathInterpreter.java PredicateContext.java
               jxpath/xdocs/stylesheets project.xml
               jxpath/src/java/org/apache/commons/jxpath/functions
                        MethodFunction.java ConstructorFunction.java
               jxpath/src/test/org/apache/commons/jxpath
                        JXPathTestCase.java
               jxpath/src/java/org/apache/commons/jxpath/ri
                        JXPathContextReferenceImpl.java EvalContext.java
               jxpath/src/java/org/apache/commons/jxpath/ri/model/dom
                        DOMAttributePointer.java
  Added:       jxpath/src/java/org/apache/commons/jxpath/ri/compiler
                        NameAttributeTest.java
               jxpath/src/java/org/apache/commons/jxpath/ri
                        InfoSetUtil.java
  Log:
  Refactoring
  
  Revision  Changes    Path
  1.4       +14 -11    jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/VariableReference.java
  
  Index: VariableReference.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/VariableReference.java,v
  retrieving revision 1.3
  retrieving revision 1.4
  diff -u -r1.3 -r1.4
  --- VariableReference.java	24 Apr 2002 04:05:38 -0000	1.3
  +++ VariableReference.java	8 May 2002 00:39:59 -0000	1.4
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/VariableReference.java,v 1.3 2002/04/24 04:05:38 dmitri Exp $
  - * $Revision: 1.3 $
  - * $Date: 2002/04/24 04:05:38 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/VariableReference.java,v 1.4 2002/05/08 00:39:59 dmitri Exp $
  + * $Revision: 1.4 $
  + * $Date: 2002/05/08 00:39:59 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -62,12 +62,13 @@
   package org.apache.commons.jxpath.ri.compiler;
   
   import org.apache.commons.jxpath.ri.QName;
  +import org.apache.commons.jxpath.ri.EvalContext;
   
   /**
    * An element of the compile tree holding a variable reference.
    *
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.3 $ $Date: 2002/04/24 04:05:38 $
  + * @version $Revision: 1.4 $ $Date: 2002/05/08 00:39:59 $
    */
   public class VariableReference extends Expression {
   
  @@ -94,12 +95,14 @@
           return false;
       }
   
  -    public void setEvaluationMode(int evalMode){
  -        if (evalMode == EVALUATION_MODE_ALWAYS){
  -            super.setEvaluationMode(EVALUATION_MODE_ONCE_AND_SAVE);
  -        }
  -        else {
  -            super.setEvaluationMode(evalMode);
  -        }
  +    public Object compute(EvalContext context){
  +        return computeValue(context);
  +    }
  +
  +    /**
  +     * Returns the value of the variable.
  +     */
  +    public Object computeValue(EvalContext context){
  +        return context.getRootContext().getVariableContext(varName);
       }
   }
  
  
  
  1.5       +34 -18    jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/TreeCompiler.java
  
  Index: TreeCompiler.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/TreeCompiler.java,v
  retrieving revision 1.4
  retrieving revision 1.5
  diff -u -r1.4 -r1.5
  --- TreeCompiler.java	24 Apr 2002 04:05:38 -0000	1.4
  +++ TreeCompiler.java	8 May 2002 00:39:59 -0000	1.5
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/TreeCompiler.java,v 1.4 2002/04/24 04:05:38 dmitri Exp $
  - * $Revision: 1.4 $
  - * $Date: 2002/04/24 04:05:38 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/TreeCompiler.java,v 1.5 2002/05/08 00:39:59 dmitri Exp $
  + * $Revision: 1.5 $
  + * $Date: 2002/05/08 00:39:59 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -66,10 +66,12 @@
   
   /**
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.4 $ $Date: 2002/04/24 04:05:38 $
  + * @version $Revision: 1.5 $ $Date: 2002/05/08 00:39:59 $
    */
   public class TreeCompiler implements Compiler {
   
  +    private static final QName QNAME_NAME = new QName(null, "name");
  +
       public Object number(String value){
           return new Constant(new Double(value));
       }
  @@ -82,19 +84,6 @@
           return new QName(prefix, name);
       }
   
  -    /*
  -    public Object nodeTypeTest(int nodeType){
  -        return new NodeTypeTest(nodeType);
  -    }
  -
  -    public Object processingInstructionTest(String value){
  -        return new ProcessingInstructionTest(value);
  -    }
  -
  -    public Object traverse(boolean recursive, int axis, Object nodeTest, Object[] predicates){
  -        return new Step(recursive, axis, (NodeTest)nodeTest, toExpressionArray(predicates));
  -    }
  -*/
       public Object sum(Object[] arguments){
           return new CoreOperation(Expression.OP_SUM, toExpressionArray(arguments));
       }
  @@ -132,7 +121,12 @@
       }
   
       public Object equal(Object left, Object right){
  -        return new CoreOperation(Expression.OP_EQ, (Expression)left, (Expression)right);
  +        if (isNameAttributeTest((Expression)left)){
  +            return new NameAttributeTest((Expression)left, (Expression)right);
  +        }
  +        else {
  +            return new CoreOperation(Expression.OP_EQ, (Expression)left, (Expression)right);
  +        }
       }
   
       public Object notEqual(Object left, Object right){
  @@ -211,5 +205,27 @@
               }
           }
           return stepArray;
  +    }
  +    
  +    private boolean isNameAttributeTest(Expression arg){
  +        if (arg.getExpressionTypeCode() != Expression.OP_LOCATION_PATH){
  +            return false;
  +        }
  +        
  +        Step[] steps = ((LocationPath)arg).getSteps();
  +        if (steps.length != 1){
  +            return false;
  +        }
  +        if (steps[0].getAxis() != Compiler.AXIS_ATTRIBUTE){
  +            return false;
  +        }
  +        NodeTest test = steps[0].getNodeTest();
  +        if (!(test instanceof NodeNameTest)){
  +            return false;
  +        }
  +        if (!((NodeNameTest)test).getNodeName().equals(QNAME_NAME)){
  +            return false;
  +        }
  +        return true;
       }
   }
  
  
  
  1.4       +4 -25     jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Step.java
  
  Index: Step.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Step.java,v
  retrieving revision 1.3
  retrieving revision 1.4
  diff -u -r1.3 -r1.4
  --- Step.java	24 Apr 2002 04:05:38 -0000	1.3
  +++ Step.java	8 May 2002 00:39:59 -0000	1.4
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Step.java,v 1.3 2002/04/24 04:05:38 dmitri Exp $
  - * $Revision: 1.3 $
  - * $Date: 2002/04/24 04:05:38 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Step.java,v 1.4 2002/05/08 00:39:59 dmitri Exp $
  + * $Revision: 1.4 $
  + * $Date: 2002/05/08 00:39:59 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -65,7 +65,7 @@
   
   /**
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.3 $ $Date: 2002/04/24 04:05:38 $
  + * @version $Revision: 1.4 $ $Date: 2002/05/08 00:39:59 $
    */
   public class Step {
       private int axis;
  @@ -99,27 +99,6 @@
               }
           }
           return false;
  -    }
  -
  -    public void setEvaluationMode(int mode){
  -        if (predicates != null){
  -            for (int i = 0; i < predicates.length; i++){
  -                switch(mode){
  -                    case Expression.EVALUATION_MODE_ALWAYS:
  -                        if (predicates[i].isContextDependent()){
  -                            predicates[i].setEvaluationMode(Expression.EVALUATION_MODE_ALWAYS);
  -                        }
  -                        else {
  -                            predicates[i].setEvaluationMode(Expression.EVALUATION_MODE_ONCE_AND_SAVE);
  -                        }
  -                        break;
  -                    case Expression.EVALUATION_MODE_ONCE:
  -                    case Expression.EVALUATION_MODE_ONCE_AND_SAVE:
  -                        predicates[i].setEvaluationMode(Expression.EVALUATION_MODE_ONCE);
  -                        break;
  -                }
  -            }
  -        }
       }
   
       public String toString(){
  
  
  
  1.4       +105 -40   jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Path.java
  
  Index: Path.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Path.java,v
  retrieving revision 1.3
  retrieving revision 1.4
  diff -u -r1.3 -r1.4
  --- Path.java	24 Apr 2002 04:05:38 -0000	1.3
  +++ Path.java	8 May 2002 00:39:59 -0000	1.4
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Path.java,v 1.3 2002/04/24 04:05:38 dmitri Exp $
  - * $Revision: 1.3 $
  - * $Date: 2002/04/24 04:05:38 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Path.java,v 1.4 2002/05/08 00:39:59 dmitri Exp $
  + * $Revision: 1.4 $
  + * $Date: 2002/05/08 00:39:59 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -61,13 +61,17 @@
    */
   package org.apache.commons.jxpath.ri.compiler;
   
  +import org.apache.commons.jxpath.Pointer;
   import org.apache.commons.jxpath.ri.Compiler;
  +import org.apache.commons.jxpath.ri.EvalContext;
  +import org.apache.commons.jxpath.ri.model.NodePointer;
  +import org.apache.commons.jxpath.ri.axes.*;
   
   /**
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.3 $ $Date: 2002/04/24 04:05:38 $
  + * @version $Revision: 1.4 $ $Date: 2002/05/08 00:39:59 $
    */
  -public class Path extends Expression {
  +public abstract class Path extends Expression {
   
       private Step[] steps;
       public static final String BASIC_PATH_HINT = "basicPathHint";
  @@ -95,63 +99,38 @@
           return false;
       }
   
  -    public void setEvaluationMode(int mode){
  -        super.setEvaluationMode(mode);
  -        if (steps != null){
  -            for (int i = 0; i < steps.length; i++){
  -                if (steps[i].isContextDependent()){
  -                    steps[i].setEvaluationMode(Expression.EVALUATION_MODE_ALWAYS);
  -                }
  -                else {
  -                    switch(mode){
  -                        case EVALUATION_MODE_ALWAYS:
  -                        case EVALUATION_MODE_ONCE_AND_SAVE:
  -                                steps[i].setEvaluationMode(Expression.EVALUATION_MODE_ONCE_AND_SAVE);
  -                            break;
  -                        case EVALUATION_MODE_ONCE:
  -                            steps[i].setEvaluationMode(Expression.EVALUATION_MODE_ONCE);
  -                            break;
  -                    }
  -                }
  -            }
  -        }
  -    }
  -
       /**
        * Recognized paths formatted as <code>foo/bar[3]/baz[@name = 'biz']</code>.  The
        * evaluation of such "simple" paths is optimized and streamlined.
        */
  -    public Object getEvaluationHint(String hint){
  -        if (!hint.equals(BASIC_PATH_HINT)){
  -            return null;
  -        }
  -
  +    public boolean isSimplePath(){
           if (!basicKnown){
               basicKnown = true;
               basic = true;
               Step[] steps = getSteps();
               for (int i = 0; i < steps.length; i++){
  -//                System.err.println("STEP: " + steps[i]);
                   if (steps[i].getAxis() != Compiler.AXIS_CHILD ||
                           !(steps[i].getNodeTest() instanceof NodeNameTest) ||
  -                        ((NodeNameTest)steps[i].getNodeTest()).getNodeName().getName().equals("*")){
  +                        ((NodeNameTest)steps[i].getNodeTest()).
  +                                    getNodeName().getName().equals("*")){
                       basic = false;
                       break;
                   }
  -                Expression predicates[] = steps[i].getPredicates();
  -                basic = basic && areBasicPredicates(predicates);
  +                if (basic){
  +                    basic = areBasicPredicates(steps[i].getPredicates());
  +                }
               }
           }
  -        return basic ? Boolean.TRUE : Boolean.FALSE;
  +        return basic;
       }
   
       protected boolean areBasicPredicates(Expression predicates[]){
           if (predicates != null && predicates.length != 0){
               boolean firstIndex = true;
               for (int i = 0; i < predicates.length; i++){
  -                Expression dyn = (Expression)predicates[i].getEvaluationHint(CoreOperation.DYNAMIC_PROPERTY_ACCESS_HINT);
  -                if (dyn != null){
  -                    if (dyn.isContextDependent()){
  +                if (predicates[i] instanceof NameAttributeTest){
  +                    if (((NameAttributeTest)predicates[i]).
  +                                getNameTestExpression().isContextDependent()){
                           return false;
                       }
                   }
  @@ -167,5 +146,91 @@
               }
           }
           return true;
  +    }
  +
  +    /**
  +     * Given a root context, walks a path therefrom and finds the
  +     * pointer to the first element matching the path.
  +     */
  +    protected Pointer getSingleNodePointerForSteps(EvalContext context){
  +        if (steps.length == 0){
  +            return context.getSingleNodePointer();
  +        }
  +
  +        if (isSimplePath()){
  +            NodePointer ptr = (NodePointer)context.getSingleNodePointer();
  +            return SimplePathInterpreter.interpretPath(context, ptr, steps);
  +        }
  +        else {
  +            for (int i = 0; i < steps.length; i++){
  +                context = createContextForStep(context, steps[i].getAxis(), steps[i].getNodeTest());
  +                Expression predicates[] = steps[i].getPredicates();
  +                if (predicates != null){
  +                    for (int j = 0; j < predicates.length; j++){
  +                        context = new PredicateContext(context, predicates[j]);
  +                    }
  +                }
  +            }
  +
  +            return context.getSingleNodePointer();
  +        }
  +    }
  +
  +    /**
  +     * Given a root context, walks a path therefrom and builds a context
  +     * that contains all nodes matching the path.
  +     */
  +    protected EvalContext evalSteps(EvalContext context){
  +        if (steps.length == 0){
  +            return context;
  +        }
  +
  +        for (int i = 0; i < steps.length; i++){
  +            context = createContextForStep(context, steps[i].getAxis(), steps[i].getNodeTest());
  +            Expression predicates[] = steps[i].getPredicates();
  +            if (predicates != null){
  +                for (int j = 0; j < predicates.length; j++){
  +                    context = new PredicateContext(context, predicates[j]);
  +                }
  +            }
  +        }
  +
  +        return context;
  +    }
  +
  +    /**
  +     * Different axes are serviced by different contexts. This method
  +     * allocates the right context for the supplied step.
  +     */
  +    protected EvalContext createContextForStep(EvalContext context, int axis, NodeTest nodeTest){
  +        switch(axis){
  +            case Compiler.AXIS_ANCESTOR:
  +                return new AncestorContext(context, false, nodeTest);
  +            case Compiler.AXIS_ANCESTOR_OR_SELF:
  +                return new AncestorContext(context, true, nodeTest);
  +            case Compiler.AXIS_ATTRIBUTE:
  +                return new AttributeContext(context, nodeTest);
  +            case Compiler.AXIS_CHILD:
  +                return new ChildContext(context, nodeTest, false, false);
  +            case Compiler.AXIS_DESCENDANT:
  +                return new DescendantContext(context, false, nodeTest);
  +            case Compiler.AXIS_DESCENDANT_OR_SELF:
  +                return new DescendantContext(context, true, nodeTest);
  +            case Compiler.AXIS_FOLLOWING:
  +                return new PrecedingOrFollowingContext(context, nodeTest, false);
  +            case Compiler.AXIS_FOLLOWING_SIBLING:
  +                return new ChildContext(context, nodeTest, true, false);
  +            case Compiler.AXIS_NAMESPACE:
  +                return new NamespaceContext(context, nodeTest);
  +            case Compiler.AXIS_PARENT:
  +                return new ParentContext(context, nodeTest);
  +            case Compiler.AXIS_PRECEDING:
  +                return new PrecedingOrFollowingContext(context, nodeTest, true);
  +            case Compiler.AXIS_PRECEDING_SIBLING:
  +                return new ChildContext(context, nodeTest, true, true);
  +            case Compiler.AXIS_SELF:
  +                return new SelfContext(context, nodeTest);
  +        }
  +        return null;        // Never happens
       }
   }
  
  
  
  1.3       +5 -27     jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Operation.java
  
  Index: Operation.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Operation.java,v
  retrieving revision 1.2
  retrieving revision 1.3
  diff -u -r1.2 -r1.3
  --- Operation.java	24 Apr 2002 04:05:38 -0000	1.2
  +++ Operation.java	8 May 2002 00:39:59 -0000	1.3
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Operation.java,v 1.2 2002/04/24 04:05:38 dmitri Exp $
  - * $Revision: 1.2 $
  - * $Date: 2002/04/24 04:05:38 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Operation.java,v 1.3 2002/05/08 00:39:59 dmitri Exp $
  + * $Revision: 1.3 $
  + * $Date: 2002/05/08 00:39:59 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -63,9 +63,9 @@
   
   /**
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.2 $ $Date: 2002/04/24 04:05:38 $
  + * @version $Revision: 1.3 $ $Date: 2002/05/08 00:39:59 $
    */
  -public class Operation extends Expression {
  +public abstract class Operation extends Expression {
   
       protected Expression args[];
   
  @@ -87,27 +87,5 @@
               }
           }
           return false;
  -    }
  -
  -    public void setEvaluationMode(int mode){
  -        super.setEvaluationMode(mode);
  -        if (args != null){
  -            for (int i = 0; i < args.length; i++){
  -                switch(mode){
  -                    case EVALUATION_MODE_ALWAYS:
  -                        if (args[i].isContextDependent()){
  -                            args[i].setEvaluationMode(Expression.EVALUATION_MODE_ALWAYS);
  -                        }
  -                        else {
  -                            args[i].setEvaluationMode(Expression.EVALUATION_MODE_ONCE_AND_SAVE);
  -                        }
  -                        break;
  -                    case EVALUATION_MODE_ONCE:
  -                    case EVALUATION_MODE_ONCE_AND_SAVE:
  -                        args[i].setEvaluationMode(Expression.EVALUATION_MODE_ONCE);
  -                        break;
  -                }
  -            }
  -        }
       }
   }
  
  
  
  1.5       +32 -4     jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/LocationPath.java
  
  Index: LocationPath.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/LocationPath.java,v
  retrieving revision 1.4
  retrieving revision 1.5
  diff -u -r1.4 -r1.5
  --- LocationPath.java	24 Apr 2002 04:05:38 -0000	1.4
  +++ LocationPath.java	8 May 2002 00:39:59 -0000	1.5
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/LocationPath.java,v 1.4 2002/04/24 04:05:38 dmitri Exp $
  - * $Revision: 1.4 $
  - * $Date: 2002/04/24 04:05:38 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/LocationPath.java,v 1.5 2002/05/08 00:39:59 dmitri Exp $
  + * $Revision: 1.5 $
  + * $Date: 2002/05/08 00:39:59 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -61,9 +61,12 @@
    */
   package org.apache.commons.jxpath.ri.compiler;
   
  +import org.apache.commons.jxpath.ri.EvalContext;
  +import org.apache.commons.jxpath.ri.axes.InitialContext;
  +
   /**
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.4 $ $Date: 2002/04/24 04:05:38 $
  + * @version $Revision: 1.5 $ $Date: 2002/05/08 00:39:59 $
    */
   public class LocationPath extends Path {
   
  @@ -107,5 +110,30 @@
           }
           buffer.append(')');
           return buffer.toString();
  +    }
  +
  +    public Object compute(EvalContext context){
  +        // Create a chain of contexts
  +        EvalContext rootContext;
  +        if (isAbsolute()){
  +            rootContext = context.getRootContext();
  +        }
  +        else {
  +            rootContext = context;
  +        }
  +        return evalSteps(new InitialContext(rootContext));
  +    }
  +
  +
  +    public Object computeValue(EvalContext context){
  +        // Create a chain of contexts
  +        EvalContext rootContext;
  +        if (isAbsolute()) {
  +            rootContext = context.getRootContext();
  +        }
  +        else {
  +            rootContext = context;
  +        }
  +        return getSingleNodePointerForSteps(new InitialContext(rootContext));
       }
   }
  
  
  
  1.5       +31 -4     jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/ExtensionFunction.java
  
  Index: ExtensionFunction.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/ExtensionFunction.java,v
  retrieving revision 1.4
  retrieving revision 1.5
  diff -u -r1.4 -r1.5
  --- ExtensionFunction.java	24 Apr 2002 04:05:38 -0000	1.4
  +++ ExtensionFunction.java	8 May 2002 00:39:59 -0000	1.5
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/ExtensionFunction.java,v 1.4 2002/04/24 04:05:38 dmitri Exp $
  - * $Revision: 1.4 $
  - * $Date: 2002/04/24 04:05:38 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/ExtensionFunction.java,v 1.5 2002/05/08 00:39:59 dmitri Exp $
  + * $Revision: 1.5 $
  + * $Date: 2002/05/08 00:39:59 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -61,13 +61,18 @@
    */
   package org.apache.commons.jxpath.ri.compiler;
   
  +import org.apache.commons.jxpath.Function;
  +import org.apache.commons.jxpath.JXPathException;
   import org.apache.commons.jxpath.ri.QName;
  +import org.apache.commons.jxpath.ri.EvalContext;
  +
  +import java.util.Arrays;
   
   /**
    * Represents an element of the parse tree representing an extension function call.
    *
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.4 $ $Date: 2002/04/24 04:05:38 $
  + * @version $Revision: 1.5 $ $Date: 2002/05/08 00:39:59 $
    */
   public class ExtensionFunction extends Operation {
   
  @@ -92,5 +97,27 @@
   
       public String opCodeToString(){
           return super.opCodeToString() + ':' + functionName;
  +    }
  +
  +    public Object compute(EvalContext context){
  +        return computeValue(context);
  +    }
  +
  +    public Object computeValue(EvalContext context){
  +        Object[] parameters = null;
  +        if (args != null){
  +            parameters = new Object[args.length];
  +            for (int i = 0; i < args.length; i++){
  +                Object param = args[i].compute(context);
  +                parameters[i] = param;
  +            }
  +        }
  +        Function function = context.getRootContext().getFunction(functionName, parameters);
  +        if (function == null){
  +            throw new JXPathException("No such function: " + functionName +
  +                 Arrays.asList(parameters));
  +        }
  +
  +        return function.invoke(context, parameters);
       }
   }
  
  
  
  1.4       +67 -54    jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/ExpressionPath.java
  
  Index: ExpressionPath.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/ExpressionPath.java,v
  retrieving revision 1.3
  retrieving revision 1.4
  diff -u -r1.3 -r1.4
  --- ExpressionPath.java	24 Apr 2002 04:05:38 -0000	1.3
  +++ ExpressionPath.java	8 May 2002 00:39:59 -0000	1.4
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/ExpressionPath.java,v 1.3 2002/04/24 04:05:38 dmitri Exp $
  - * $Revision: 1.3 $
  - * $Date: 2002/04/24 04:05:38 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/ExpressionPath.java,v 1.4 2002/05/08 00:39:59 dmitri Exp $
  + * $Revision: 1.4 $
  + * $Date: 2002/05/08 00:39:59 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -61,12 +61,16 @@
    */
   package org.apache.commons.jxpath.ri.compiler;
   
  +import org.apache.commons.jxpath.ri.EvalContext;
  +import org.apache.commons.jxpath.ri.axes.*;
  +import org.apache.commons.jxpath.ri.model.NodePointer;
  +
   /**
    * An element of the parse tree that represents an expression path, which is
    * a path that starts with an expression like a function call: <code>getFoo(.)/bar</code>.
    *
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.3 $ $Date: 2002/04/24 04:05:38 $
  + * @version $Revision: 1.4 $ $Date: 2002/05/08 00:39:59 $
    */
   public class ExpressionPath extends Path {
   
  @@ -115,62 +119,15 @@
       }
   
       /**
  -     * Based on the supplied argument computes the evaluation mode
  -     * for the base expression, predicates and steps.
  -     */
  -    public void setEvaluationMode(int mode){
  -        super.setEvaluationMode(mode);
  -
  -        switch(mode){
  -            case EVALUATION_MODE_ALWAYS:
  -                if (expression.isContextDependent()){
  -                    expression.setEvaluationMode(Expression.EVALUATION_MODE_ALWAYS);
  -                }
  -                else {
  -                    expression.setEvaluationMode(Expression.EVALUATION_MODE_ONCE_AND_SAVE);
  -                }
  -                break;
  -            case EVALUATION_MODE_ONCE:
  -            case EVALUATION_MODE_ONCE_AND_SAVE:
  -                expression.setEvaluationMode(Expression.EVALUATION_MODE_ONCE);
  -                break;
  -        }
  -
  -        if (predicates != null){
  -            for (int i = 0; i < predicates.length; i++){
  -                switch(mode){
  -                    case EVALUATION_MODE_ALWAYS:
  -                        if (predicates[i].isContextDependent()){
  -                            predicates[i].setEvaluationMode(Expression.EVALUATION_MODE_ALWAYS);
  -                        }
  -                        else {
  -                            predicates[i].setEvaluationMode(Expression.EVALUATION_MODE_ONCE_AND_SAVE);
  -                        }
  -                        break;
  -                    case EVALUATION_MODE_ONCE:
  -                    case EVALUATION_MODE_ONCE_AND_SAVE:
  -                        predicates[i].setEvaluationMode(Expression.EVALUATION_MODE_ONCE);
  -                        break;
  -                }
  -            }
  -        }
  -    }
  -
  -    /**
        * Recognized paths formatted as <code>$x[3]/foo[2]</code>.  The
        * evaluation of such "simple" paths is optimized and streamlined.
        */
  -    public Object getEvaluationHint(String hint){
  -        if (!hint.equals(BASIC_PREDICATES_HINT)){
  -            return super.getEvaluationHint(hint);
  -        }
  -
  +    public boolean isSimpleExpressionPath(){
           if (!basicKnown){
               basicKnown = true;
  -            basic = super.getEvaluationHint(BASIC_PATH_HINT).equals(Boolean.TRUE) &&
  -                    areBasicPredicates(getPredicates());
  +            basic = isSimplePath() && areBasicPredicates(getPredicates());
           }
  -        return basic ? Boolean.TRUE : Boolean.FALSE;
  +        return basic;
       }
   
       public String toString(){
  @@ -199,5 +156,61 @@
           }
           buffer.append(')');
           return buffer.toString();
  +    }
  +
  +    public Object compute(EvalContext context){
  +        return expressionPath(context, false);
  +    }
  +
  +    public Object computeValue(EvalContext context){
  +        return expressionPath(context, true);
  +    }
  +
  +    /**
  +     * Walks an expression path (a path that starts with an expression)
  +     */
  +    protected Object expressionPath(EvalContext evalContext, boolean firstMatch){
  +        Object value = expression.compute(evalContext);
  +        EvalContext context;
  +        if (value instanceof InitialContext){
  +            // This is an optimization. We can avoid iterating through a collection
  +            // if the context bean is in fact one.
  +            context = (InitialContext)value;
  +        }
  +        else if (value instanceof EvalContext){
  +            // UnionContext will collect all values from the "value" context
  +            // and treat the whole thing as a big collection.
  +            context = new UnionContext(evalContext, new EvalContext[]{(EvalContext)value});
  +        }
  +        else {
  +            context = evalContext.getRootContext().getConstantContext(value);
  +        }
  +
  +        if (firstMatch && isSimpleExpressionPath() &&
  +                !(context instanceof UnionContext)){
  +            EvalContext ctx = context;
  +            NodePointer ptr = (NodePointer)ctx.getSingleNodePointer();
  +            if (ptr != null &&
  +                    (ptr.getIndex() == NodePointer.WHOLE_COLLECTION ||
  +                     predicates == null || predicates.length == 0)){
  +                NodePointer pointer = SimplePathInterpreter.
  +                    interpretPredicates(evalContext, ptr, predicates);
  +                return SimplePathInterpreter.interpretPath(evalContext,
  +                    pointer, getSteps());
  +            }
  +        }
  +
  +        if (predicates != null){
  +            for (int j = 0; j < predicates.length; j++){
  +//                System.err.println("PREDICATE: " + predicates[j]);
  +                context = new PredicateContext(context, predicates[j]);
  +            }
  +        }
  +        if (firstMatch){
  +            return getSingleNodePointerForSteps(context);
  +        }
  +        else {
  +            return evalSteps(context);
  +        }
       }
   }
  
  
  
  1.3       +97 -55    jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Expression.java
  
  Index: Expression.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Expression.java,v
  retrieving revision 1.2
  retrieving revision 1.3
  diff -u -r1.2 -r1.3
  --- Expression.java	24 Apr 2002 04:05:38 -0000	1.2
  +++ Expression.java	8 May 2002 00:39:59 -0000	1.3
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Expression.java,v 1.2 2002/04/24 04:05:38 dmitri Exp $
  - * $Revision: 1.2 $
  - * $Date: 2002/04/24 04:05:38 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Expression.java,v 1.3 2002/05/08 00:39:59 dmitri Exp $
  + * $Revision: 1.3 $
  + * $Date: 2002/05/08 00:39:59 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -61,6 +61,16 @@
    */
   package org.apache.commons.jxpath.ri.compiler;
   
  +import org.apache.commons.jxpath.Pointer;
  +import org.apache.commons.jxpath.ri.EvalContext;
  +import org.apache.commons.jxpath.ri.model.NodePointer;
  +import org.apache.commons.jxpath.ri.QName;
  +import org.apache.commons.jxpath.util.ValueUtils;
  +
  +import java.util.Collections;
  +import java.util.Iterator;
  +import java.util.Locale;
  +
   /**
    * Common superclass for several types of nodes in the parse tree. Provides
    * APIs for optimization of evaluation of expressions.  Specifically, an
  @@ -69,7 +79,7 @@
    * provides that hint.
    *
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.2 $ $Date: 2002/04/24 04:05:38 $
  + * @version $Revision: 1.3 $ $Date: 2002/05/08 00:39:59 $
    */
   public abstract class Expression {
   
  @@ -104,38 +114,21 @@
   
       public static final int OP_CORE_FUNCTION = 22;
   
  +    public static final int OP_KEY_LOOKUP = 23;
  +
  +    protected static Double ZERO = new Double(0);
  +    protected static Double ONE = new Double(1);
  +    protected static Double NaN = new Double(Double.NaN);
  +
       private int typeCode;
   
       private boolean contextDependencyKnown = false;
       private boolean contextDependent;
   
  -    public static final int EVALUATION_MODE_ONCE = 0;
  -    public static final int EVALUATION_MODE_ONCE_AND_SAVE = 1;
  -    public static final int EVALUATION_MODE_ALWAYS = 2;
  -    private int evaluationMode;
  -
  -    private int id = -1;
  -
       protected Expression(int typeCode){
           this.typeCode = typeCode;
       }
   
  -    /**
  -     * Expression IDs are used with context-independent expressions
  -     * for identifying the register holding the intermediate result of
  -     * this expression evaluation.
  -     */
  -    public void setID(int id){
  -        this.id = id;
  -    }
  -
  -    /**
  -     * @see #setID
  -     */
  -    public int getID(){
  -        return id;
  -    }
  -
       public int getExpressionTypeCode(){
           return typeCode;
       }
  @@ -161,34 +154,6 @@
        */
       public abstract boolean computeContextDependent();
   
  -    /**
  -     * Evaluation mode can be EVALUATION_MODE_ONCE, EVALUATION_MODE_ONCE_AND_SAVE
  -     * or EVALUATION_MODE_ALWAYS, depending on whether or not this expression
  -     * is context-dependent.  The compiler calls setEvaluationMode(EVALUATION_MODE_ONCE)
  -     * on the root Expression.  That expression recursively computes
  -     * the evaluation mode for its children and calls setEvaluationMode on
  -     * each of them.
  -     */
  -    public void setEvaluationMode(int mode){
  -        this.evaluationMode = mode;
  -    }
  -
  -    /**
  -     * @see #setEvaluationMode
  -     */
  -    public int getEvaluationMode(){
  -        return evaluationMode;
  -    }
  -
  -    /**
  -     * Some expressions return optimization hints that
  -     * help the interpreter choose between alternative
  -     * evaluation algorithms.
  -     */
  -    public Object getEvaluationHint(String hint){
  -        return null;
  -    }
  -
       public String toString(){
           StringBuffer buffer = new StringBuffer();
           buffer.append('(');
  @@ -233,5 +198,82 @@
               case OP_CORE_FUNCTION: return "CORE_FUNCTION";
           }
           return "UNKNOWN";
  +    }
  +
  +    /**
  +     * Evaluates the expression. If the result is a node set, returns
  +     * the first element of the node set.
  +     */
  +    public abstract Object computeValue(EvalContext context);
  +    public abstract Object compute(EvalContext context);
  +
  +    public Iterator iterate(EvalContext context){
  +        Object result = compute(context);
  +        if (result instanceof EvalContext){
  +            return new ValueIterator((EvalContext)result);
  +        }
  +        return ValueUtils.iterate(result);
  +    }
  +
  +    public Iterator iteratePointers(EvalContext context){
  +        Object result = compute(context);
  +        if (result == null){
  +            return Collections.EMPTY_LIST.iterator();
  +        }
  +        if (result instanceof EvalContext){
  +            return (EvalContext)result;
  +        }
  +        return new PointerIterator(ValueUtils.iterate(result),
  +                new QName(null, "value"),
  +                context.getRootContext().getCurrentNodePointer().getLocale());
  +    }
  +
  +    public static class PointerIterator implements Iterator {
  +        private Iterator iterator;
  +        private QName qname;
  +        private Locale locale;
  +
  +        public PointerIterator(Iterator it, QName qname, Locale locale){
  +            this.iterator = it;
  +            this.qname = qname;
  +            this.locale = locale;
  +        }
  +
  +        public boolean hasNext(){
  +            return iterator.hasNext();
  +        }
  +
  +        public Object next(){
  +            Object o = iterator.next();
  +            return NodePointer.newNodePointer(qname, o, locale);
  +        }
  +
  +        public void remove(){
  +            throw new UnsupportedOperationException();
  +        }
  +    }
  +
  +    public static class ValueIterator implements Iterator {
  +        private Iterator iterator;
  +
  +        public ValueIterator(Iterator it){
  +            this.iterator = it;
  +        }
  +
  +        public boolean hasNext(){
  +            return iterator.hasNext();
  +        }
  +
  +        public Object next(){
  +            Object o = iterator.next();
  +            if (o instanceof Pointer){
  +                return ((Pointer)o).getValue();
  +            }
  +            return o;
  +        }
  +
  +        public void remove(){
  +            throw new UnsupportedOperationException();
  +        }
       }
   }
  
  
  
  1.5       +279 -32   jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/CoreOperation.java
  
  Index: CoreOperation.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/CoreOperation.java,v
  retrieving revision 1.4
  retrieving revision 1.5
  diff -u -r1.4 -r1.5
  --- CoreOperation.java	24 Apr 2002 04:05:38 -0000	1.4
  +++ CoreOperation.java	8 May 2002 00:39:59 -0000	1.5
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/CoreOperation.java,v 1.4 2002/04/24 04:05:38 dmitri Exp $
  - * $Revision: 1.4 $
  - * $Date: 2002/04/24 04:05:38 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/CoreOperation.java,v 1.5 2002/05/08 00:39:59 dmitri Exp $
  + * $Revision: 1.5 $
  + * $Date: 2002/05/08 00:39:59 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -61,23 +61,25 @@
    */
   package org.apache.commons.jxpath.ri.compiler;
   
  +import org.apache.commons.jxpath.Pointer;
   import org.apache.commons.jxpath.ri.Compiler;
  +import org.apache.commons.jxpath.ri.InfoSetUtil;
   import org.apache.commons.jxpath.ri.QName;
  +import org.apache.commons.jxpath.ri.EvalContext;
  +import org.apache.commons.jxpath.ri.model.NodePointer;
  +import org.apache.commons.jxpath.ri.axes.UnionContext;
  +
  +import java.util.Set;
  +import java.util.HashSet;
   
   /**
    * A compile tree element representing one of the core operations like "+",
    * "-", "*" etc.
    *
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.4 $ $Date: 2002/04/24 04:05:38 $
  + * @version $Revision: 1.5 $ $Date: 2002/05/08 00:39:59 $
    */
   public class CoreOperation extends Operation {
  -
  -    private Object dynamicPropertyAccessHint;
  -    public static final String DYNAMIC_PROPERTY_ACCESS_HINT = "dynamicPropertyAccessHint";
  -    private static final Object NO_HINT = new Object();
  -    private static QName QNAME_NAME = new QName(null, "name");
  -
       public CoreOperation(int code, Expression args[]){
           super(code, args);
       }
  @@ -98,32 +100,277 @@
           return args[1];
       }
   
  +    public Object compute(EvalContext context){
  +        return computeValue(context);
  +    }
  +
  +    public Object computeValue(EvalContext context){
  +        switch (getExpressionTypeCode()){
  +            case Expression.OP_UNION:
  +                return union(context, args[0], args[1]);
  +
  +            case Expression.OP_UNARY_MINUS:
  +                return minus(context, args[0]);
  +
  +            case Expression.OP_SUM:
  +                return sum(context, args);
  +
  +            case Expression.OP_MINUS:
  +                return minus(context, args[0], args[1]);
  +
  +            case Expression.OP_MULT:
  +                return mult(context, args[0], args[1]);
  +
  +            case Expression.OP_DIV:
  +                return div(context, args[0], args[1]);
  +
  +            case Expression.OP_MOD:
  +                return mod(context, args[0], args[1]);
  +
  +            case Expression.OP_LT:
  +                return lt(context, args[0], args[1]);
  +
  +            case Expression.OP_GT:
  +                return gt(context, args[0], args[1]);
  +
  +            case Expression.OP_LTE:
  +                return lte(context, args[0], args[1]);
  +
  +            case Expression.OP_GTE:
  +                return gte(context, args[0], args[1]);
  +
  +            case Expression.OP_EQ:
  +                return eq(context, args[0], args[1]);
  +
  +            case Expression.OP_NE:
  +                return ne(context, args[0], args[1]);
  +
  +            case Expression.OP_AND:
  +                return and(context, args);
  +
  +            case Expression.OP_OR:
  +                return or(context, args);
  +        }
  +        return null; // Should never happen
  +    }
  +
  +    /**
  +     * Computes <code>"left | right"<code>
  +     */
  +    protected Object union(EvalContext context, Expression left, Expression right){
  +        Object l = left.compute(context);
  +        Object r = right.compute(context);
  +        EvalContext lctx;
  +        if (l instanceof EvalContext){
  +            lctx = (EvalContext)l;
  +        }
  +        else {
  +            lctx = context.getRootContext().getConstantContext(l);
  +        }
  +        EvalContext rctx;
  +        if (r instanceof EvalContext){
  +            rctx = (EvalContext)r;
  +        }
  +        else {
  +            rctx = context.getRootContext().getConstantContext(r);
  +        }
  +        return new UnionContext(context.getRootContext(), new EvalContext[]{lctx, rctx});
  +    }
  +
  +    /**
  +     * Computes <code>"-arg"<code>
  +     */
  +    protected Object minus(EvalContext context, Expression arg){
  +        double a = InfoSetUtil.doubleValue(arg.computeValue(context));
  +        return new Double(-a);
  +    }
  +
  +    /**
  +     * Computes <code>"a + b + c + d"<code>
  +     */
  +    protected Object sum(EvalContext context, Expression[] arguments){
  +        double s = 0.0;
  +        for (int i = 0; i < arguments.length; i++){
  +            s += InfoSetUtil.doubleValue(arguments[i].computeValue(context));
  +        }
  +        return new Double(s);
  +    }
  +
  +    /**
  +     * Computes <code>"left - right"<code>
  +     */
  +    protected Object minus(EvalContext context, Expression left, Expression right){
  +        double l = InfoSetUtil.doubleValue(left.computeValue(context));
  +        double r = InfoSetUtil.doubleValue(right.computeValue(context));
  +        return new Double(l - r);
  +    }
  +
  +    /**
  +     * Computes <code>"left div right"<code>
  +     */
  +    protected Object div(EvalContext context, Expression left, Expression right){
  +        double l = InfoSetUtil.doubleValue(left.computeValue(context));
  +        double r = InfoSetUtil.doubleValue(right.computeValue(context));
  +        return new Double(l/r);
  +    }
  +
  +    /**
  +     * Computes <code>"left * right"<code>
  +     */
  +    protected Object mult(EvalContext context, Expression left, Expression right){
  +        double l = InfoSetUtil.doubleValue(left.computeValue(context));
  +        double r = InfoSetUtil.doubleValue(right.computeValue(context));
  +        return new Double(l*r);
  +    }
  +
       /**
  -     * Recognized predicated formatted as <code>[@name = <i>expr</i>]</code>
  +     * Computes <code>"left mod right"<code>
        */
  -    public Object getEvaluationHint(String hint){
  -        if (getExpressionTypeCode() != OP_EQ ||
  -                !hint.equals(DYNAMIC_PROPERTY_ACCESS_HINT)){
  -            return null;
  -        }
  -
  -        if (dynamicPropertyAccessHint == null){
  -            dynamicPropertyAccessHint = NO_HINT;
  -
  -            Expression arg1 = getArg1();
  -            if (arg1.getExpressionTypeCode() == Expression.OP_LOCATION_PATH){
  -                Step[] steps = ((LocationPath)arg1).getSteps();
  -                if (steps.length == 1 &&
  -                        steps[0].getAxis() == Compiler.AXIS_ATTRIBUTE &&
  -                        steps[0].getNodeTest() instanceof NodeNameTest &&
  -                        ((NodeNameTest)steps[0].getNodeTest()).getNodeName().equals(QNAME_NAME)){
  -                    dynamicPropertyAccessHint = getArg2();
  -                }
  +    protected Object mod(EvalContext context, Expression left, Expression right){
  +        long l = (long)InfoSetUtil.doubleValue(left.computeValue(context));
  +        long r = (long)InfoSetUtil.doubleValue(right.computeValue(context));
  +        return new Double(l%r);
  +    }
  +
  +    /**
  +     * Computes <code>"left &lt; right"<code>
  +     */
  +    protected Object lt(EvalContext context, Expression left, Expression right){
  +        double l = InfoSetUtil.doubleValue(left.computeValue(context));
  +        double r = InfoSetUtil.doubleValue(right.computeValue(context));
  +        return l < r ? Boolean.TRUE : Boolean.FALSE;
  +    }
  +
  +    /**
  +     * Computes <code>"left &gt; right"<code>
  +     */
  +    protected Object gt(EvalContext context, Expression left, Expression right){
  +        double l = InfoSetUtil.doubleValue(left.computeValue(context));
  +        double r = InfoSetUtil.doubleValue(right.computeValue(context));
  +        return l > r ? Boolean.TRUE : Boolean.FALSE;
  +    }
  +
  +    /**
  +     * Computes <code>"left &lt;= right"<code>
  +     */
  +    protected Object lte(EvalContext context, Expression left, Expression right){
  +        double l = InfoSetUtil.doubleValue(left.computeValue(context));
  +        double r = InfoSetUtil.doubleValue(right.computeValue(context));
  +        return l <= r ? Boolean.TRUE : Boolean.FALSE;
  +    }
  +
  +    /**
  +     * Computes <code>"left &gt;= right"<code>
  +     */
  +    protected Object gte(EvalContext context, Expression left, Expression right){
  +        double l = InfoSetUtil.doubleValue(left.computeValue(context));
  +        double r = InfoSetUtil.doubleValue(right.computeValue(context));
  +        return l >= r ? Boolean.TRUE : Boolean.FALSE;
  +    }
  +
  +    /**
  +     * Computes <code>"left = right"<code>
  +     */
  +    protected Object eq(EvalContext context, Expression left, Expression right){
  +        return equal(context, left, right) ? Boolean.TRUE : Boolean.FALSE;
  +    }
  +
  +    /**
  +     * Computes <code>"left != right"<code>
  +     */
  +    protected Object ne(EvalContext context, Expression left, Expression right){
  +        return equal(context, left, right) ? Boolean.FALSE : Boolean.TRUE;
  +    }
  +
  +    /**
  +     * Compares two values
  +     */
  +    protected boolean equal(EvalContext context, Expression left, Expression right){
  +        Object l = left.computeValue(context);
  +        Object r = right.computeValue(context);
  +        boolean result;
  +        if (l == r){
  +            return true;
  +        }
  +
  +        if (l instanceof EvalContext && r instanceof EvalContext){
  +            Set lset = new HashSet(valueSet(((EvalContext)l)));
  +            Set rset = new HashSet(valueSet(((EvalContext)r)));
  +            return lset.equals(rset);
  +        }
  +
  +        if (l instanceof EvalContext){
  +            l = ((EvalContext)l).getSingleNodePointer();
  +        }
  +        if (r instanceof EvalContext){
  +            r = ((EvalContext)r).getSingleNodePointer();
  +        }
  +
  +        if (l instanceof Pointer && r instanceof Pointer){
  +            if (l.equals(r)){
  +                return true;
               }
           }
  -        if (dynamicPropertyAccessHint == NO_HINT){
  -            return null;
  +
  +        if (l instanceof NodePointer){
  +            l = ((NodePointer)l).getValue();
  +        }
  +        if (r instanceof NodePointer){
  +            r = ((NodePointer)r).getValue();
  +        }
  +
  +        if (l instanceof Boolean || r instanceof Boolean){
  +            result = (InfoSetUtil.booleanValue(l) == InfoSetUtil.booleanValue(r));
  +        }
  +        else if (l instanceof Number || r instanceof Number){
  +            result = (InfoSetUtil.doubleValue(l) == InfoSetUtil.doubleValue(r));
  +        }
  +        else if (l instanceof String || r instanceof String){
  +            result = (InfoSetUtil.stringValue(l).equals(InfoSetUtil.stringValue(r)));
  +        }
  +        else if (l == null){
  +            return r == null;
  +        }
  +        else {
  +            result = l.equals(r);
  +        }
  +        return result;
  +    }
  +
  +    /**
  +     * Extracts all values from a context
  +     */
  +    private Set valueSet(EvalContext context){
  +        HashSet set = new HashSet();
  +        while(context.hasNext()){
  +            context.next();
  +            NodePointer pointer = context.getCurrentNodePointer();
  +            set.add(pointer.getValue());
  +        }
  +        return set;
  +    }
  +
  +    /**
  +     * Computes <code>"left and right"<code>
  +     */
  +    protected Object and(EvalContext context, Expression[] arguments){
  +        for (int i = 0; i < arguments.length; i++){
  +            if (!InfoSetUtil.booleanValue(arguments[i].computeValue(context))){
  +                return Boolean.FALSE;
  +            }
  +        }
  +        return Boolean.TRUE;
  +    }
  +
  +    /**
  +     * Computes <code>"left or right"<code>
  +     */
  +    protected Object or(EvalContext context, Expression[] arguments){
  +        for (int i = 0; i < arguments.length; i++){
  +            if (InfoSetUtil.booleanValue(arguments[i].computeValue(context))){
  +                return Boolean.TRUE;
  +            }
           }
  -        return dynamicPropertyAccessHint;
  +        return Boolean.FALSE;
       }
   }
  
  
  
  1.4       +411 -4    jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/CoreFunction.java
  
  Index: CoreFunction.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/CoreFunction.java,v
  retrieving revision 1.3
  retrieving revision 1.4
  diff -u -r1.3 -r1.4
  --- CoreFunction.java	24 Apr 2002 04:05:38 -0000	1.3
  +++ CoreFunction.java	8 May 2002 00:39:59 -0000	1.4
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/CoreFunction.java,v 1.3 2002/04/24 04:05:38 dmitri Exp $
  - * $Revision: 1.3 $
  - * $Date: 2002/04/24 04:05:38 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/CoreFunction.java,v 1.4 2002/05/08 00:39:59 dmitri Exp $
  + * $Revision: 1.4 $
  + * $Date: 2002/05/08 00:39:59 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -61,17 +61,25 @@
    */
   package org.apache.commons.jxpath.ri.compiler;
   
  +import org.apache.commons.jxpath.JXPathException;
   import org.apache.commons.jxpath.ri.Compiler;
  +import org.apache.commons.jxpath.ri.InfoSetUtil;
  +import org.apache.commons.jxpath.ri.EvalContext;
  +import org.apache.commons.jxpath.ri.model.NodePointer;
  +import org.apache.commons.jxpath.ri.model.beans.NullPointer;
  +
  +import java.util.Collection;
   
   /**
    * An element of the compile tree representing one of built-in functions
    * like "position()" or "number()".
    *
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.3 $ $Date: 2002/04/24 04:05:38 $
  + * @version $Revision: 1.4 $ $Date: 2002/05/08 00:39:59 $
    */
   public class CoreFunction extends Operation {
   
  +    private static final Double ZERO = new Double(0);
       private int functionCode;
   
       public CoreFunction(int functionCode, Expression args[]){
  @@ -183,5 +191,404 @@
   //            case Compiler.FUNCTION_KEY:            function = "key"; break;
           }
           return super.opCodeToString() + ':' + function;
  +    }
  +
  +    public Object compute(EvalContext context){
  +        return computeValue(context);
  +    }
  +
  +    /**
  +     * Computes a built-in function
  +     */
  +    public Object computeValue(EvalContext context){
  +        switch(functionCode){
  +            case Compiler.FUNCTION_LAST:                return functionLast(context);
  +            case Compiler.FUNCTION_POSITION:            return functionPosition(context);
  +            case Compiler.FUNCTION_COUNT:               return functionCount(context);
  +            case Compiler.FUNCTION_LANG:                return functionLang(context);
  +            case Compiler.FUNCTION_ID:
  +            {
  +                System.err.println("UNIMPLEMENTED: " + this);
  +                return null;
  +            }
  +            case Compiler.FUNCTION_LOCAL_NAME:          return functionLocalName(context);
  +            case Compiler.FUNCTION_NAMESPACE_URI:       return functionNamespaceURI(context);
  +            case Compiler.FUNCTION_NAME:                return functionName(context);
  +            case Compiler.FUNCTION_STRING:              return functionString(context);
  +            case Compiler.FUNCTION_CONCAT:              return functionConcat(context);
  +            case Compiler.FUNCTION_STARTS_WITH:         return functionStartsWith(context);
  +            case Compiler.FUNCTION_CONTAINS:            return functionContains(context);
  +            case Compiler.FUNCTION_SUBSTRING_BEFORE:    return functionSubstringBefore(context);
  +            case Compiler.FUNCTION_SUBSTRING_AFTER:     return functionSubstringAfter(context);
  +            case Compiler.FUNCTION_SUBSTRING:           return functionSubstring(context);
  +            case Compiler.FUNCTION_STRING_LENGTH:       return functionStringLength(context);
  +            case Compiler.FUNCTION_NORMALIZE_SPACE:     return functionNormalizeSpace(context);
  +            case Compiler.FUNCTION_TRANSLATE:           return functionTranslate(context);
  +            case Compiler.FUNCTION_BOOLEAN:             return functionBoolean(context);
  +            case Compiler.FUNCTION_NOT:                 return functionNot(context);
  +            case Compiler.FUNCTION_TRUE:                return functionTrue(context);
  +            case Compiler.FUNCTION_FALSE:               return functionFalse(context);
  +            case Compiler.FUNCTION_NULL:                return functionNull(context);
  +            case Compiler.FUNCTION_NUMBER:              return functionNumber(context);
  +            case Compiler.FUNCTION_SUM:                 return functionSum(context);
  +            case Compiler.FUNCTION_FLOOR:               return functionFloor(context);
  +            case Compiler.FUNCTION_CEILING:             return functionCeiling(context);
  +            case Compiler.FUNCTION_ROUND:               return functionRound(context);
  +//            case Compiler.FUNCTION_KEY:
  +//                System.err.println("UNIMPLEMENTED: " + function);
  +        }
  +        return null;
  +    }
  +
  +    protected Object functionLast(EvalContext context){
  +        assertArgCount(0);
  +        // Move the position to the beginning and iterate through
  +        // the context to count nodes.
  +        int old = context.getCurrentPosition();
  +        context.reset();
  +        int count = 0;
  +        while(context.nextNode()){
  +            count++;
  +        }
  +
  +        // Restore the current position.
  +        if (old != 0){
  +            context.setPosition(old);
  +        }
  +        return new Double(count);
  +    }
  +
  +    protected Object functionPosition(EvalContext context){
  +        assertArgCount(0);
  +        return new Integer(context.getCurrentPosition());
  +    }
  +
  +    protected Object functionCount(EvalContext context){
  +        assertArgCount(1);
  +        Expression arg1 = getArg1();
  +        int count = 0;
  +        Object value = arg1.compute(context);
  +        if (value instanceof NodePointer){
  +            value = ((NodePointer)value).getValue();
  +        }
  +        if (value instanceof EvalContext){
  +            EvalContext ctx = (EvalContext)value;
  +            while(ctx.hasNext()){
  +                ctx.next();
  +                count++;
  +            }
  +        }
  +        else if (value instanceof Collection){
  +            count = ((Collection)value).size();
  +        }
  +        else if (value == null){
  +            count = 0;
  +        }
  +        else {
  +            count = 1;
  +        }
  +        return new Double(count);
  +    }
  +
  +    protected Object functionLang(EvalContext context){
  +        assertArgCount(1);
  +        String lang = InfoSetUtil.stringValue(getArg1().computeValue(context));
  +        NodePointer pointer = (NodePointer)context.getSingleNodePointer();
  +        if (pointer == null){
  +            return Boolean.FALSE;
  +        }
  +        return pointer.isLanguage(lang) ? Boolean.TRUE: Boolean.FALSE;
  +    }
  +
  +    protected Object functionNamespaceURI(EvalContext context){
  +        if (getArgumentCount() == 0){
  +            return context.getCurrentNodePointer();
  +        }
  +        assertArgCount(1);
  +        Object set = getArg1().compute(context);
  +        if (set instanceof EvalContext){
  +            EvalContext ctx = (EvalContext)set;
  +            if (ctx.hasNext()){
  +                ctx.next();
  +                String str = ctx.getCurrentNodePointer().getNamespaceURI();
  +                return str == null ? "" : str;
  +            }
  +        }
  +        return "";
  +    }
  +
  +    protected Object functionLocalName(EvalContext context){
  +        if (getArgumentCount() == 0){
  +            return context.getCurrentNodePointer();
  +        }
  +        assertArgCount(1);
  +        Object set = getArg1().compute(context);
  +        if (set instanceof EvalContext){
  +            EvalContext ctx = (EvalContext)set;
  +            if (ctx.hasNext()){
  +                ctx.next();
  +                return ctx.getCurrentNodePointer().getName().getName();
  +            }
  +        }
  +        return "";
  +    }
  +
  +    protected Object functionName(EvalContext context){
  +        if (getArgumentCount() == 0){
  +            return context.getCurrentNodePointer();
  +        }
  +        assertArgCount(1);
  +        Object set = getArg1().compute(context);
  +        if (set instanceof EvalContext){
  +            EvalContext ctx = (EvalContext)set;
  +            if (ctx.hasNext()){
  +                ctx.next();
  +                return ctx.getCurrentNodePointer().getExpandedName().toString();
  +            }
  +        }
  +        return "";
  +    }
  +
  +    protected Object functionString(EvalContext context){
  +        if (getArgumentCount() == 0){
  +            return InfoSetUtil.stringValue(context.getCurrentNodePointer());
  +        }
  +        assertArgCount(1);
  +        return InfoSetUtil.stringValue(getArg1().computeValue(context));
  +    }
  +
  +    protected Object functionConcat(EvalContext context){
  +        if (getArgumentCount() < 2){
  +            assertArgCount(2);
  +        }
  +        StringBuffer buffer = new StringBuffer();
  +        Expression args[] = getArguments();
  +        for (int i = 0; i < args.length; i++){
  +            buffer.append(InfoSetUtil.stringValue(args[i].compute(context)));
  +        }
  +        return buffer.toString();
  +    }
  +
  +    protected Object functionStartsWith(EvalContext context){
  +        assertArgCount(2);
  +        String s1 = InfoSetUtil.stringValue(getArg1().computeValue(context));
  +        String s2 = InfoSetUtil.stringValue(getArg2().computeValue(context));
  +        return s1.startsWith(s2) ? Boolean.TRUE : Boolean.FALSE;
  +    }
  +
  +    protected Object functionContains(EvalContext context){
  +        assertArgCount(2);
  +        String s1 = InfoSetUtil.stringValue(getArg1().computeValue(context));
  +        String s2 = InfoSetUtil.stringValue(getArg2().computeValue(context));
  +        return s1.indexOf(s2) != -1 ? Boolean.TRUE : Boolean.FALSE;
  +    }
  +
  +    protected Object functionSubstringBefore(EvalContext context){
  +        assertArgCount(2);
  +        String s1 = InfoSetUtil.stringValue(getArg1().computeValue(context));
  +        String s2 = InfoSetUtil.stringValue(getArg2().computeValue(context));
  +        int index = s1.indexOf(s2);
  +        if (index == -1){
  +            return "";
  +        }
  +        return s1.substring(0, index);
  +    }
  +
  +    protected Object functionSubstringAfter(EvalContext context){
  +        assertArgCount(2);
  +        String s1 = InfoSetUtil.stringValue(getArg1().computeValue(context));
  +        String s2 = InfoSetUtil.stringValue(getArg2().computeValue(context));
  +        int index = s1.indexOf(s2);
  +        if (index == -1){
  +            return "";
  +        }
  +        return s1.substring(index + s2.length());
  +    }
  +
  +    protected Object functionSubstring(EvalContext context){
  +        int ac = getArgumentCount();
  +        if (ac != 2 && ac != 3){
  +            assertArgCount(2);
  +        }
  +
  +        String s1 = InfoSetUtil.stringValue(getArg1().computeValue(context));
  +        double from = InfoSetUtil.doubleValue(getArg2().computeValue(context));
  +        if (Double.isNaN(from)){
  +            return "";
  +        }
  +
  +        from = Math.round(from);
  +        if (ac == 2){
  +            if (from < 1){
  +                from = 1;
  +            }
  +            return s1.substring((int)from - 1);
  +        }
  +        else {
  +            double length = InfoSetUtil.doubleValue(getArg3().computeValue(context));
  +            length = Math.round(length);
  +            if (length < 0){
  +                return "";
  +            }
  +
  +            double to = from + length;
  +            if (to < 1){
  +                return "";
  +            }
  +
  +            if (to > s1.length() + 1){
  +                if (from < 1){
  +                    from = 1;
  +                }
  +                return s1.substring((int)from - 1);
  +            }
  +
  +            if (from < 1){
  +                from = 1;
  +            }
  +            return s1.substring((int)from - 1, (int)(to - 1));
  +        }
  +    }
  +
  +    protected Object functionStringLength(EvalContext context){
  +        String s;
  +        if (getArgumentCount() == 0){
  +            s = InfoSetUtil.stringValue(context.getCurrentNodePointer());
  +        }
  +        else {
  +            assertArgCount(1);
  +            s = InfoSetUtil.stringValue(getArg1().computeValue(context));
  +        }
  +        return new Double(s.length());
  +    }
  +
  +    protected Object functionNormalizeSpace(EvalContext context){
  +        assertArgCount(1);
  +        String s = InfoSetUtil.stringValue(getArg1().computeValue(context));
  +        char chars[] = s.toCharArray();
  +        int out = 0;
  +        int phase = 0;
  +        for (int in = 0; in < chars.length; in++){
  +            switch(chars[in]){
  +                case 0x20:
  +                case 0x9:
  +                case 0xD:
  +                case 0xA:
  +                    if (phase == 0){      // beginning
  +                        ;
  +                    }
  +                    else if (phase == 1){ // non-space
  +                        phase = 2;
  +                        chars[out++] = ' ';
  +                    }
  +                    break;
  +                default:
  +                    chars[out++] = chars[in];
  +                    phase = 1;
  +            }
  +        }
  +        if (phase == 2){ // trailing-space
  +            out--;
  +        }
  +        return new String(chars, 0, out);
  +    }
  +
  +    protected Object functionTranslate(EvalContext context){
  +        assertArgCount(3);
  +        String s1 = InfoSetUtil.stringValue(getArg1().computeValue(context));
  +        String s2 = InfoSetUtil.stringValue(getArg2().computeValue(context));
  +        String s3 = InfoSetUtil.stringValue(getArg3().computeValue(context));
  +        char chars[] = s1.toCharArray();
  +        int out = 0;
  +        for (int in = 0; in < chars.length; in++){
  +            char c = chars[in];
  +            int inx = s2.indexOf(c);
  +            if (inx != -1){
  +                if (inx < s3.length()){
  +                    chars[out++] = s3.charAt(inx);
  +                }
  +            }
  +            else {
  +                chars[out++] = c;
  +            }
  +        }
  +        return new String(chars, 0, out);
  +    }
  +
  +    protected Object functionBoolean(EvalContext context){
  +        assertArgCount(1);
  +        return InfoSetUtil.booleanValue(getArg1().computeValue(context)) ? Boolean.TRUE : Boolean.FALSE;
  +    }
  +
  +    protected Object functionNot(EvalContext context){
  +        assertArgCount(1);
  +        return InfoSetUtil.booleanValue(getArg1().computeValue(context)) ? Boolean.FALSE : Boolean.TRUE;
  +    }
  +
  +    protected Object functionTrue(EvalContext context){
  +        assertArgCount(0);
  +        return Boolean.TRUE;
  +    }
  +
  +    protected Object functionFalse(EvalContext context){
  +        assertArgCount(0);
  +        return Boolean.FALSE;
  +    }
  +
  +    protected Object functionNull(EvalContext context){
  +        assertArgCount(0);
  +        return new NullPointer(null, context.getRootContext().getCurrentNodePointer().getLocale());
  +    }
  +
  +    protected Object functionNumber(EvalContext context){
  +        if (getArgumentCount() == 0){
  +            return InfoSetUtil.number(context.getCurrentNodePointer());
  +        }
  +        assertArgCount(1);
  +        return InfoSetUtil.number(getArg1().computeValue(context));
  +    }
  +
  +    protected Object functionSum(EvalContext context){
  +        assertArgCount(1);
  +        Object v = getArg1().compute(context);
  +        if (v == null){
  +            return ZERO;
  +        }
  +        else if (v instanceof EvalContext){
  +            double sum = 0.0;
  +            EvalContext ctx = (EvalContext)v;
  +            while (ctx.nextSet()){
  +                while (ctx.nextNode()){
  +                    sum += InfoSetUtil.doubleValue(ctx.getCurrentNodePointer());
  +                }
  +            }
  +            return new Double(sum);
  +        }
  +        throw new JXPathException("Invalid argument type for 'sum': "
  +            + v.getClass().getName());
  +    }
  +
  +    protected Object functionFloor(EvalContext context){
  +        assertArgCount(1);
  +        double v = InfoSetUtil.doubleValue(getArg1().computeValue(context));
  +        return new Double(Math.floor(v));
  +    }
  +
  +    protected Object functionCeiling(EvalContext context){
  +        assertArgCount(1);
  +        double v = InfoSetUtil.doubleValue(getArg1().computeValue(context));
  +        return new Double(Math.ceil(v));
  +    }
  +
  +    protected Object functionRound(EvalContext context){
  +        assertArgCount(1);
  +        double v = InfoSetUtil.doubleValue(getArg1().computeValue(context));
  +        return new Double(Math.round(v));
  +    }
  +
  +    private void assertArgCount(int count){
  +        if (getArgumentCount() != count){
  +            throw new JXPathException("Incorrect number of argument: " + this);
  +        }
       }
   }
  
  
  
  1.3       +11 -13    jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Constant.java
  
  Index: Constant.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Constant.java,v
  retrieving revision 1.2
  retrieving revision 1.3
  diff -u -r1.2 -r1.3
  --- Constant.java	24 Apr 2002 04:05:38 -0000	1.2
  +++ Constant.java	8 May 2002 00:39:59 -0000	1.3
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Constant.java,v 1.2 2002/04/24 04:05:38 dmitri Exp $
  - * $Revision: 1.2 $
  - * $Date: 2002/04/24 04:05:38 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/Constant.java,v 1.3 2002/05/08 00:39:59 dmitri Exp $
  + * $Revision: 1.3 $
  + * $Date: 2002/05/08 00:39:59 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -61,11 +61,13 @@
    */
   package org.apache.commons.jxpath.ri.compiler;
   
  +import org.apache.commons.jxpath.ri.EvalContext;
  +
   /**
    * A compile tree element containing a constant number or string.
    *
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.2 $ $Date: 2002/04/24 04:05:38 $
  + * @version $Revision: 1.3 $ $Date: 2002/05/08 00:39:59 $
    */
   public class Constant extends Expression {
   
  @@ -81,10 +83,14 @@
           this.value = string;
       }
   
  +    public Object compute(EvalContext context){
  +        return value;
  +    }
  +
       /**
        * Returns the value of the constant.
        */
  -    public Object getValue(){
  +    public Object computeValue(EvalContext context){
           return value;
       }
   
  @@ -100,14 +106,6 @@
        */
       public boolean computeContextDependent(){
           return false;
  -    }
  -
  -    /**
  -     * Ignores the argument, sets the evaluation mode to EVALUATION_MODE_ALWAYS.
  -     * There is no reason to store the constant value in a temporary register
  -     */
  -    public void setEvaluationMode(int evalMode){
  -        super.setEvaluationMode(EVALUATION_MODE_ALWAYS);
       }
   
       public String toString(){
  
  
  
  1.1                  jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/compiler/NameAttributeTest.java
  
  Index: NameAttributeTest.java
  ===================================================================
  package org.apache.commons.jxpath.ri.compiler;
  
  import org.apache.commons.jxpath.ri.EvalContext;
  
  /**
   *
   *
   * @author Dmitri Plotnikov
   * @version $Revision: 1.1 $ $Date: 2002/05/08 00:39:59 $
   */
  public class NameAttributeTest extends CoreOperation {
  
      public NameAttributeTest(Expression namePath, Expression nameValue){
          super(OP_EQ, namePath, nameValue);
      }
  
      public Expression getNameTestExpression(){
          return getArg2();
      }
  
      /**
       * @see Expression#computeContextDependent()
       */
      public boolean computeContextDependent() {
          return true;
      }
  }
  
  
  
  1.4       +11 -11    jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/axes/SimplePathInterpreter.java
  
  Index: SimplePathInterpreter.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/axes/SimplePathInterpreter.java,v
  retrieving revision 1.3
  retrieving revision 1.4
  diff -u -r1.3 -r1.4
  --- SimplePathInterpreter.java	28 Apr 2002 04:35:48 -0000	1.3
  +++ SimplePathInterpreter.java	8 May 2002 00:40:00 -0000	1.4
  @@ -70,6 +70,7 @@
   import org.apache.commons.jxpath.ri.model.NodeIterator;
   import org.apache.commons.jxpath.ri.model.NodePointer;
   import org.apache.commons.jxpath.ri.model.beans.*;
  +import org.apache.commons.jxpath.ri.InfoSetUtil;
   
   /**
    * An simple XPath evaluation mechanism, which works only for some xpaths
  @@ -119,8 +120,7 @@
               }
               else {
                   Expression lastIndexPredicate = null;
  -                if (predicates[count - 1].
  -                            getEvaluationHint(CoreOperation.DYNAMIC_PROPERTY_ACCESS_HINT) == null){
  +                if (!(predicates[count - 1] instanceof NameAttributeTest)){
                       lastIndexPredicate = predicates[count - 1];
                   }
   
  @@ -176,8 +176,7 @@
   
           int count = predicates.length;
           Expression lastIndexPredicate = null;
  -        if (predicates[count - 1].
  -                    getEvaluationHint(CoreOperation.DYNAMIC_PROPERTY_ACCESS_HINT) == null){
  +        if (!(predicates[count - 1] instanceof NameAttributeTest)){
               lastIndexPredicate = predicates[count - 1];
           }
   
  @@ -269,7 +268,7 @@
       }
   
       private static int indexFromPredicate(EvalContext context, Expression predicate){
  -        Object value = context.eval(predicate);
  +        Object value = predicate.computeValue(context);
           if (value instanceof EvalContext){
               value = ((EvalContext)value).getSingleNodePointer();
           }
  @@ -281,18 +280,19 @@
           }
   
           if (value instanceof Number){
  -            return (int)(context.doubleValue(value) + 0.5) - 1;
  +            return (int)(InfoSetUtil.doubleValue(value) + 0.5) - 1;
           }
  -        else if (context.booleanValue(value)){
  +        else if (InfoSetUtil.booleanValue(value)){
               return 0;
           }
   
           return -1;
       }
   
  -    private static String keyFromPredicate(EvalContext context, Expression predicate){
  -        Expression expr = (Expression)predicate.
  -                getEvaluationHint(CoreOperation.DYNAMIC_PROPERTY_ACCESS_HINT);
  -        return context.stringValue(context.eval(expr));
  +    private static String keyFromPredicate(EvalContext context,
  +                Expression predicate){
  +        Expression expr = ((NameAttributeTest)predicate).
  +                                    getNameTestExpression();
  +        return InfoSetUtil.stringValue(expr.computeValue(context));
       }
   }
  
  
  
  1.9       +17 -13    jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/axes/PredicateContext.java
  
  Index: PredicateContext.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/axes/PredicateContext.java,v
  retrieving revision 1.8
  retrieving revision 1.9
  diff -u -r1.8 -r1.9
  --- PredicateContext.java	28 Apr 2002 04:35:48 -0000	1.8
  +++ PredicateContext.java	8 May 2002 00:40:00 -0000	1.9
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/axes/PredicateContext.java,v 1.8 2002/04/28 04:35:48 dmitri Exp $
  - * $Revision: 1.8 $
  - * $Date: 2002/04/28 04:35:48 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/axes/PredicateContext.java,v 1.9 2002/05/08 00:40:00 dmitri Exp $
  + * $Revision: 1.9 $
  + * $Date: 2002/05/08 00:40:00 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -65,27 +65,31 @@
   import org.apache.commons.jxpath.ri.EvalContext;
   import org.apache.commons.jxpath.ri.compiler.CoreOperation;
   import org.apache.commons.jxpath.ri.compiler.Expression;
  +import org.apache.commons.jxpath.ri.compiler.NameAttributeTest;
   import org.apache.commons.jxpath.ri.model.NodePointer;
   import org.apache.commons.jxpath.ri.model.beans.PropertyOwnerPointer;
   import org.apache.commons.jxpath.ri.model.beans.PropertyPointer;
  +import org.apache.commons.jxpath.ri.InfoSetUtil;
   
   /**
    * EvalContext that checks predicates.
    *
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.8 $ $Date: 2002/04/28 04:35:48 $
  + * @version $Revision: 1.9 $ $Date: 2002/05/08 00:40:00 $
    */
   public class PredicateContext extends EvalContext {
       private Expression expression;
       private boolean done = false;
  -    private Expression dynamicPropertyNameExpression;
  +    private Expression nameTestExpression;
       private PropertyPointer dynamicPropertyPointer;
   
       public PredicateContext(EvalContext parentContext, Expression expression){
           super(parentContext);
           this.expression = expression;
  -        dynamicPropertyNameExpression = (Expression)expression.
  -            getEvaluationHint(CoreOperation.DYNAMIC_PROPERTY_ACCESS_HINT);
  +        if (expression instanceof NameAttributeTest){
  +            nameTestExpression = 
  +                ((NameAttributeTest)expression).getNameTestExpression();
  +        }
       }
   
       public boolean nextNode(){
  @@ -94,26 +98,26 @@
           }
           while (parentContext.nextNode()){
               if (setupDynamicPropertyPointer()){
  -                Object pred = parentContext.eval(dynamicPropertyNameExpression);
  +                Object pred = nameTestExpression.computeValue(parentContext);
                   if (pred instanceof NodePointer){
                       pred = ((NodePointer)pred).getValue();
                   }
  -                dynamicPropertyPointer.setPropertyName(stringValue(pred));
  +                dynamicPropertyPointer.setPropertyName(InfoSetUtil.stringValue(pred));
                   done = true;
                   return true;
               }
               else {
  -                Object pred = parentContext.eval(expression);
  +                Object pred = expression.computeValue(parentContext);
                   if (pred instanceof NodePointer){
                       pred = ((NodePointer)pred).getNodeValue();
                   }
                   if (pred instanceof Number){
  -                    int pos = (int)doubleValue(pred);
  +                    int pos = (int)InfoSetUtil.doubleValue(pred);
                       position++;
                       done = true;
                       return parentContext.setPosition(pos);
                   }
  -                else if (booleanValue(pred)){
  +                else if (InfoSetUtil.booleanValue(pred)){
                       position++;
                       return true;
                   }
  @@ -127,7 +131,7 @@
        * "map[@name = 'name']" syntax
        */
       private boolean setupDynamicPropertyPointer(){
  -        if (dynamicPropertyNameExpression == null){
  +        if (nameTestExpression == null){
               return false;
           }
   
  
  
  
  1.4       +3 -1      jakarta-commons/jxpath/xdocs/stylesheets/project.xml
  
  Index: project.xml
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/xdocs/stylesheets/project.xml,v
  retrieving revision 1.3
  retrieving revision 1.4
  diff -u -r1.3 -r1.4
  --- project.xml	28 Apr 2002 22:43:08 -0000	1.3
  +++ project.xml	8 May 2002 00:40:00 -0000	1.4
  @@ -1,7 +1,9 @@
   <?xml version="1.0" encoding="ISO-8859-1"?>
   <project name="Commons - JXPath" href="http://jakarta.apache.org/commons/jxpath">
       <title>JXPath</title>
  -    <logo href="/images/logo.jpg">Commons</logo>
  +    <!-- logo href="/images/logo.jpg">Commons</logo -->
  +    <logo href="/images/logo.gif">JXPath</logo>
  +
       <!--
         Note: Per the .vsl file, "/site" links will be prefixed with "http://jakarta.apache.org/site"
               Other links starting with "/" become "./...".
  
  
  
  1.6       +10 -7     jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/functions/MethodFunction.java
  
  Index: MethodFunction.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/functions/MethodFunction.java,v
  retrieving revision 1.5
  retrieving revision 1.6
  diff -u -r1.5 -r1.6
  --- MethodFunction.java	26 Apr 2002 03:28:37 -0000	1.5
  +++ MethodFunction.java	8 May 2002 00:40:00 -0000	1.6
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/functions/MethodFunction.java,v 1.5 2002/04/26 03:28:37 dmitri Exp $
  - * $Revision: 1.5 $
  - * $Date: 2002/04/26 03:28:37 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/functions/MethodFunction.java,v 1.6 2002/05/08 00:40:00 dmitri Exp $
  + * $Revision: 1.6 $
  + * $Date: 2002/05/08 00:40:00 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -71,7 +71,7 @@
   
   /**
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.5 $ $Date: 2002/04/26 03:28:37 $
  + * @version $Revision: 1.6 $ $Date: 2002/05/08 00:40:00 $
    */
   public class MethodFunction implements Function {
   
  @@ -107,16 +107,19 @@
               else {
                   int pi = 0;
                   Class types[] = method.getParameterTypes();
  -                if (types.length >= 1 && ExpressionContext.class.isAssignableFrom(types[0])){
  +                if (types.length >= 1 &&
  +                        ExpressionContext.class.isAssignableFrom(types[0])){
                       pi = 1;
                   }
  -                target = TypeUtils.convert(parameters[0], method.getDeclaringClass());
  +                target = TypeUtils.
  +                        convert(parameters[0], method.getDeclaringClass());
                   args = new Object[parameters.length - 1 + pi];
                   if (pi == 1){
                       args[0] = context;
                   }
                   for (int i = 1; i < parameters.length; i++){
  -                    args[pi + i - 1] = TypeUtils.convert(parameters[i], types[i - 1]);
  +                    args[pi + i - 1] =
  +                            TypeUtils.convert(parameters[i], types[i + pi - 1]);
                   }
               }
   
  
  
  
  1.6       +5 -5      jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/functions/ConstructorFunction.java
  
  Index: ConstructorFunction.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/functions/ConstructorFunction.java,v
  retrieving revision 1.5
  retrieving revision 1.6
  diff -u -r1.5 -r1.6
  --- ConstructorFunction.java	26 Apr 2002 03:28:37 -0000	1.5
  +++ ConstructorFunction.java	8 May 2002 00:40:00 -0000	1.6
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/functions/ConstructorFunction.java,v 1.5 2002/04/26 03:28:37 dmitri Exp $
  - * $Revision: 1.5 $
  - * $Date: 2002/04/26 03:28:37 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/functions/ConstructorFunction.java,v 1.6 2002/05/08 00:40:00 dmitri Exp $
  + * $Revision: 1.6 $
  + * $Date: 2002/05/08 00:40:00 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -72,7 +72,7 @@
    * An extension function that creates an instance using a constructor.
    *
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.5 $ $Date: 2002/04/26 03:28:37 $
  + * @version $Revision: 1.6 $ $Date: 2002/05/08 00:40:00 $
    */
   public class ConstructorFunction implements Function {
   
  @@ -102,7 +102,7 @@
                   args[0] = context;
               }
               for (int i = 0; i < parameters.length; i++){
  -                args[i + pi] = TypeUtils.convert(parameters[i], types[i]);
  +                args[i + pi] = TypeUtils.convert(parameters[i], types[i + pi]);
               }
               return constructor.newInstance(args);
           }
  
  
  
  1.16      +77 -23    jakarta-commons/jxpath/src/test/org/apache/commons/jxpath/JXPathTestCase.java
  
  Index: JXPathTestCase.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/test/org/apache/commons/jxpath/JXPathTestCase.java,v
  retrieving revision 1.15
  retrieving revision 1.16
  diff -u -r1.15 -r1.16
  --- JXPathTestCase.java	28 Apr 2002 04:37:01 -0000	1.15
  +++ JXPathTestCase.java	8 May 2002 00:40:00 -0000	1.16
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/test/org/apache/commons/jxpath/JXPathTestCase.java,v 1.15 2002/04/28 04:37:01 dmitri Exp $
  - * $Revision: 1.15 $
  - * $Date: 2002/04/28 04:37:01 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/test/org/apache/commons/jxpath/JXPathTestCase.java,v 1.16 2002/05/08 00:40:00 dmitri Exp $
  + * $Revision: 1.16 $
  + * $Date: 2002/05/08 00:40:00 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -70,7 +70,8 @@
   
   import org.w3c.dom.*;
   import java.util.*;
  -
  +import java.lang.reflect.*;
  +import org.apache.commons.jxpath.util.*;
   import org.apache.commons.jxpath.ri.*;
   import org.apache.commons.jxpath.ri.parser.*;
   import org.apache.commons.jxpath.ri.model.*;
  @@ -80,10 +81,10 @@
   import org.apache.commons.jxpath.ri.compiler.Expression;
   import java.beans.*;
   
  -import org.apache.xpath.XPath;
  -import org.apache.xpath.XPathContext;
  -import org.apache.xml.utils.PrefixResolver;
  -import org.apache.xml.utils.PrefixResolverDefault;
  +//import org.apache.xpath.XPath;
  +//import org.apache.xpath.XPathContext;
  +//import org.apache.xml.utils.PrefixResolver;
  +//import org.apache.xml.utils.PrefixResolverDefault;
   
   /**
    * <p>
  @@ -99,12 +100,12 @@
    * </p>
    *
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.15 $ $Date: 2002/04/28 04:37:01 $
  + * @version $Revision: 1.16 $ $Date: 2002/05/08 00:40:00 $
    */
   
   public class JXPathTestCase extends TestCase
   {
  -    private boolean enabled = true;
  +    private boolean enabled = false;
   
       /**
        * Exercises this test case only
  @@ -330,7 +331,7 @@
       private void testGetValue(JXPathContext context, String xpath, Object expected) {
           Object actual = context.getValue(xpath);
           assertEquals("Evaluating <" + xpath + ">", expected, actual);
  -        
  +
           CompiledExpression expr = context.compile(xpath);
           actual = expr.getValue(context);
           assertEquals("Evaluating CE <" + xpath + ">", expected, actual);
  @@ -339,7 +340,7 @@
       private void testGetValue(JXPathContext context, String xpath, Object expected, Class requiredType) {
           Object actual = context.getValue(xpath, requiredType);
           assertEquals("Evaluating <" + xpath + ">", expected, actual);
  - 
  +
           CompiledExpression expr = context.compile(xpath);
           actual = expr.getValue(context, requiredType);
           assertEquals("Evaluating CE <" + xpath + ">", expected, actual);
  @@ -394,11 +395,12 @@
       }
   
       public void testDocumentOrder(){
  -        if (!enabled){
  -            return;
  -        }
  +//        if (!enabled){
  +//            return;
  +//        }
   
           JXPathContext context = JXPathContext.newContext(createTestBeanWithDOM());
  +
           testDocumentOrder(context, "boolean", "int", -1);
           testDocumentOrder(context, "integers[1]", "integers[2]", -1);
           testDocumentOrder(context, "integers[1]", "integers[1]", 0);
  @@ -478,9 +480,9 @@
        * Test JXPath.createPath() with various arguments
        */
       public void testCreatePath(){
  -//        if (!enabled){
  -//            return;
  -//        }
  +        if (!enabled){
  +            return;
  +        }
           TestBean tBean = createTestBeanWithDOM();
           tBean.setNestedBean(null);
           tBean.setBeans(null);
  @@ -662,9 +664,9 @@
       }
   
       public void testParserReferenceImpl() throws Exception {
  -        if (!enabled){
  -            return;
  -        }
  +//        if (!enabled){
  +//            return;
  +//        }
           System.setProperty(JXPathContextFactory.FACTORY_NAME_PROPERTY,
                   "org.apache.commons.jxpath.ri.JXPathContextFactoryReferenceImpl");
           testParser(JXPathContextFactory.newInstance().newContext(null, bean), false);
  @@ -790,7 +792,7 @@
       }
   
       static final XP[] xpath_tests = new XP[]{
  -
  +/*
           // Numbers
           test("1", new Double(1.0)),
           testEval("1", list(new Double(1.0))),
  @@ -930,7 +932,7 @@
   
           test("name(integers)", "integers"),
           testEval("*[name(.) = 'integers']", list(new Integer(1), new Integer(2), new Integer(3), new Integer(4))),
  -
  +*/
           // Dynamic properties
           test("nestedBean[@name = 'int']", new Integer(1)),    // Not implemented in Xalan
           testPath("nestedBean[@name = 'int']", "/nestedBean/int"),
  @@ -1190,5 +1192,57 @@
           testPath("$test/object/vendor/location[1]//street", "$test/object/vendor[1]/location[1]/address[1]/street[1]"),
           test("$object//street", "Orchard Road"),
           testPath("$object//street", "$object/vendor[1]/location[1]/address[1]/street[1]"),
  +    };
  +
  +    public void testTypeConversions(){
  +        for (int i=0; i < typeConversionTests.length; i++) {
  +            TypeConversionTest test = typeConversionTests[i];
  +            try {
  +                boolean can = TypeUtils.canConvert(test.from, test.toType);
  +                assertTrue("Can convert: " + test, can);
  +                Object result = TypeUtils.convert(test.from, test.toType);
  +                if (result.getClass().isArray()){
  +                    ArrayList list = new ArrayList();
  +                    for (int j = 0; j < Array.getLength(result); j++){
  +                        list.add(Array.get(result, j));
  +                    }
  +                    result = list;
  +                }
  +                assertEquals("Convert: " + test, test.expected, result);
  +            }
  +            catch (Exception ex){
  +                System.err.println("Exception during conversion test <" + test + ">");
  +                ex.printStackTrace();
  +            }
  +        }
  +
  +    }
  +
  +    private static class TypeConversionTest {
  +        public Object from;
  +        public Class toType;
  +        public Object expected;
  +
  +        public TypeConversionTest(Object from, Class toType, Object expected){
  +            this.from = from;
  +            this.toType = toType;
  +            this.expected = expected;
  +        }
  +        public String toString(){
  +            return from.getClass() + " to " + toType;
  +        }
  +    }
  +
  +    private TypeConversionTest[] typeConversionTests = new TypeConversionTest[]{
  +        new TypeConversionTest(new Integer(1), String.class, "1"),
  +
  +        new TypeConversionTest(new int[]{1, 2}, List.class,
  +                Arrays.asList(new Object[]{new Integer(1), new Integer(2)})),
  +
  +        new TypeConversionTest(new int[]{1, 2}, String[].class,
  +                list("1", "2")),
  +
  +        new TypeConversionTest(list(new Integer(1), new Integer(2)), String[].class,
  +                list("1", "2")),
       };
   }
  
  
  
  1.15      +19 -21    jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/JXPathContextReferenceImpl.java
  
  Index: JXPathContextReferenceImpl.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/JXPathContextReferenceImpl.java,v
  retrieving revision 1.14
  retrieving revision 1.15
  diff -u -r1.14 -r1.15
  --- JXPathContextReferenceImpl.java	28 Apr 2002 04:37:01 -0000	1.14
  +++ JXPathContextReferenceImpl.java	8 May 2002 00:40:00 -0000	1.15
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/JXPathContextReferenceImpl.java,v 1.14 2002/04/28 04:37:01 dmitri Exp $
  - * $Revision: 1.14 $
  - * $Date: 2002/04/28 04:37:01 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/JXPathContextReferenceImpl.java,v 1.15 2002/05/08 00:40:00 dmitri Exp $
  + * $Revision: 1.15 $
  + * $Date: 2002/05/08 00:40:00 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -84,7 +84,7 @@
    * The reference implementation of JXPathContext.
    *
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.14 $ $Date: 2002/04/28 04:37:01 $
  + * @version $Revision: 1.15 $ $Date: 2002/05/08 00:40:00 $
    */
   public class JXPathContextReferenceImpl extends JXPathContext
   {
  @@ -146,7 +146,7 @@
       public static NodePointerFactory[] getNodePointerFactories(){
           return nodeFactoryArray;
       }
  -    
  +
       public CompiledExpression compile(String xpath){
           return new JXPathCompiledExpression(xpath, compileExpression(xpath));
       }
  @@ -161,7 +161,6 @@
               }
               if (expr == null){
                   expr = (Expression)Parser.parseExpression(xpath, compiler);
  -                expr.setEvaluationMode(Expression.EVALUATION_MODE_ONCE);
                   compiled.put(xpath, new SoftReference(expr));
                   if (cleanupCount++ >= CLEANUP_THRESHOLD){
                       cleanupCache();
  @@ -172,7 +171,6 @@
               expr = (Expression)compiled.get(xpath);
               if (expr == null){
                   expr = (Expression)Parser.parseExpression(xpath, compiler);
  -                expr.setEvaluationMode(Expression.EVALUATION_MODE_ONCE);
                   compiled.put(xpath, expr);
               }
           }
  @@ -197,9 +195,9 @@
       public Object getValue(String xpath){
           return getValue(xpath, compileExpression(xpath));
       }
  -    
  -    public Object getValue(String xpath, Expression expr){    
  -        Object result = getRootContext().eval(expr);        
  +
  +    public Object getValue(String xpath, Expression expr){
  +        Object result = expr.computeValue(getRootContext());
           if (result == null && !lenient){
               throw new JXPathException("No value for xpath: " + xpath);
           }
  @@ -222,7 +220,7 @@
           Expression expr = compileExpression(xpath);
           return getValue(xpath, expr, requiredType);
       }
  -    
  +
       public Object getValue(String xpath, Expression expr, Class requiredType){
           Object value = getValue(xpath, expr);
           if (value != null && requiredType != null){
  @@ -244,17 +242,17 @@
       public Iterator iterate(String xpath){
           return iterate(xpath, compileExpression(xpath));
       }
  -    
  +
       public Iterator iterate(String xpath, Expression expr){
  -        return getRootContext().iterate(expr);        
  +        return expr.iterate(getRootContext());
       }
   
       public Pointer getPointer(String xpath){
           return getPointer(xpath, compileExpression(xpath));
       }
  -    
  +
       public Pointer getPointer(String xpath, Expression expr){
  -        Object result = getRootContext().eval(expr);        
  +        Object result = expr.computeValue(getRootContext());
           if (result instanceof EvalContext){
               result = ((EvalContext)result).getSingleNodePointer();
           }
  @@ -269,8 +267,8 @@
       public void setValue(String xpath, Object value){
           setValue(xpath, compileExpression(xpath), value);
       }
  -    
  -    
  +
  +
       public void setValue(String xpath, Expression expr, Object value){
           try {
               setValue(xpath, expr, value, false);
  @@ -284,7 +282,7 @@
       public void createPath(String xpath, Object value){
           createPath(xpath, compileExpression(xpath), value);
       }
  -    
  +
       public void createPath(String xpath, Expression expr, Object value){
           try {
               setValue(xpath, expr, value, true);
  @@ -296,7 +294,7 @@
       }
   
       private void setValue(String xpath, Expression expr, Object value, boolean create){
  -        Object result = getRootContext().eval(expr);        
  +        Object result = expr.computeValue(getRootContext());
   //        System.err.println("RESULT: " + result);
           Pointer pointer = null;
   
  @@ -330,9 +328,9 @@
       }
   
       public Iterator iteratePointers(String xpath, Expression expr){
  -        return getRootContext().iteratePointers(expr);
  +        return expr.iteratePointers(getRootContext());
       }
  -    
  +
       private void printPointer(NodePointer pointer){
           Pointer p = pointer;
           while (p != null){
  
  
  
  1.14      +7 -1139   jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/EvalContext.java
  
  Index: EvalContext.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/EvalContext.java,v
  retrieving revision 1.13
  retrieving revision 1.14
  diff -u -r1.13 -r1.14
  --- EvalContext.java	28 Apr 2002 04:36:27 -0000	1.13
  +++ EvalContext.java	8 May 2002 00:40:00 -0000	1.14
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/EvalContext.java,v 1.13 2002/04/28 04:36:27 dmitri Exp $
  - * $Revision: 1.13 $
  - * $Date: 2002/04/28 04:36:27 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/EvalContext.java,v 1.14 2002/05/08 00:40:00 dmitri Exp $
  + * $Revision: 1.14 $
  + * $Date: 2002/05/08 00:40:00 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -79,7 +79,7 @@
    * implement behavior of various XPath axes: "child::", "parent::" etc.
    *
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.13 $ $Date: 2002/04/28 04:36:27 $
  + * @version $Revision: 1.14 $ $Date: 2002/05/08 00:40:00 $
    */
   public abstract class EvalContext implements ExpressionContext, Iterator {
       protected EvalContext parentContext;
  @@ -121,7 +121,7 @@
           }
           return true;
       }
  -    
  +
       /**
        * Returns the next node pointer in the context
        */
  @@ -149,7 +149,7 @@
           throw new UnsupportedOperationException(
               "JXPath iterators cannot remove nodes");
       }
  -    
  +
       /**
        * Returns the list of all Pointers in this context
        */
  @@ -303,6 +303,7 @@
           }
           return false;
       }
  +
       /**
        * Returns true if there is another object in the current set.
        * Switches the current position and node to the next object.
  @@ -318,1138 +319,5 @@
       public boolean setPosition(int position){
           this.position = position;
           return true;
  -    }
  -
  -    /**
  -     * Creates an EvalContext with the value of the specified
  -     * variable as its context node.
  -     */
  -    protected EvalContext getVariable(QName variableName){
  -        return getRootContext().getVariableContext(variableName);
  -    }
  -
  -    protected static Double ZERO = new Double(0);
  -    protected static Double ONE = new Double(1);
  -    protected static Double NaN = new Double(Double.NaN);
  -
  -    /**
  -     * Evaluates the expression. If the result is a node set, returns
  -     * the first element of the node set.
  -     */
  -    public Object eval(Expression expression){
  -        return eval(expression, true);
  -    }
  -    
  -    public Iterator iterate(Expression expression){
  -        Object result = eval(expression, false);
  -        if (result instanceof EvalContext){
  -            return new ValueIterator((EvalContext)result);
  -        }
  -        return ValueUtils.iterate(result);
  -    }
  -    
  -    public Iterator iteratePointers(Expression expression){
  -        Object result = eval(expression, false);
  -        if (result == null){
  -            return Collections.EMPTY_LIST.iterator();
  -        }
  -        if (result instanceof EvalContext){
  -            return (EvalContext)result;
  -        }
  -        return new PointerIterator(ValueUtils.iterate(result), 
  -                    new QName(null, "value"), 
  -                    getRootContext().getCurrentNodePointer().getLocale());
  -    }
  -    
  -    /**
  -     * Evaluates the expression. If the result is a node set, returns
  -     * the whole set if firstMatch==false or the first element otherwise.
  -     */
  -    private Object eval(Expression expression, boolean firstMatch){
  -        Object value = null;
  -        switch (expression.getEvaluationMode()){
  -            case Expression.EVALUATION_MODE_ONCE:
  -            case Expression.EVALUATION_MODE_ALWAYS:
  -                value = evalExpression(expression, firstMatch);
  -                break;
  -            case Expression.EVALUATION_MODE_ONCE_AND_SAVE:
  -                RootContext root = getRootContext();
  -                int id = expression.getID();
  -                if (id == -1){
  -                    // evaluate the expression and save the intermediate result
  -                    value = evalExpression(expression, firstMatch);
  -                    id = root.setRegisteredValue(value);
  -                    expression.setID(id);
  -                }
  -                else {
  -                    value = root.getRegisteredValue(id);
  -                }
  -        }
  -        return value;
  -    }
  -
  -    /**
  -     * Evaluates the expression. If the result is a node set, returns
  -     * the whole set if firstMatch==false or the first element otherwise.
  -     */
  -    private Object evalExpression(Expression expression, boolean firstMatch){
  -        int op = expression.getExpressionTypeCode();
  -        switch(op){
  -        case Expression.OP_CONSTANT:
  -            return ((Constant)expression).getValue();
  -
  -        case Expression.OP_UNION:
  -            return union(((CoreOperation)expression).getArg1(),
  -                         ((CoreOperation)expression).getArg2());
  -
  -        case Expression.OP_UNARY_MINUS:
  -            return minus(((CoreOperation)expression).getArg1());
  -
  -        case Expression.OP_SUM:
  -            return sum(((CoreOperation)expression).getArguments());
  -
  -        case Expression.OP_MINUS:
  -            return minus(((CoreOperation)expression).getArg1(),
  -                         ((CoreOperation)expression).getArg2());
  -
  -        case Expression.OP_MULT:
  -            return mult(((CoreOperation)expression).getArg1(),
  -                        ((CoreOperation)expression).getArg2());
  -
  -        case Expression.OP_DIV:
  -            return div(((CoreOperation)expression).getArg1(),
  -                       ((CoreOperation)expression).getArg2());
  -
  -        case Expression.OP_MOD:
  -            return mod(((CoreOperation)expression).getArg1(),
  -                       ((CoreOperation)expression).getArg2());
  -
  -        case Expression.OP_LT:
  -            return lt(((CoreOperation)expression).getArg1(),
  -                      ((CoreOperation)expression).getArg2());
  -
  -        case Expression.OP_GT:
  -            return gt(((CoreOperation)expression).getArg1(),
  -                      ((CoreOperation)expression).getArg2());
  -
  -        case Expression.OP_LTE:
  -            return lte(((CoreOperation)expression).getArg1(),
  -                       ((CoreOperation)expression).getArg2());
  -
  -        case Expression.OP_GTE:
  -            return gte(((CoreOperation)expression).getArg1(),
  -                       ((CoreOperation)expression).getArg2());
  -
  -        case Expression.OP_EQ:
  -            return eq(((CoreOperation)expression).getArg1(),
  -                      ((CoreOperation)expression).getArg2());
  -
  -        case Expression.OP_NE:
  -            return ne(((CoreOperation)expression).getArg1(),
  -                      ((CoreOperation)expression).getArg2());
  -
  -        case Expression.OP_AND:
  -            return and(((CoreOperation)expression).getArguments());
  -
  -        case Expression.OP_OR:
  -            return or(((CoreOperation)expression).getArguments());
  -
  -        case Expression.OP_VAR:
  -            return getVariable(((VariableReference)expression).getVariableName());
  -
  -        case Expression.OP_CORE_FUNCTION:
  -            return coreFunction((CoreFunction)expression);
  -
  -        case Expression.OP_LOCATION_PATH:
  -            if (firstMatch){
  -                return getSingleNodePointerForPath((LocationPath)expression);
  -            }
  -            else {
  -                return path((LocationPath)expression);
  -            }
  -
  -        case Expression.OP_EXPRESSION_PATH:
  -            return expressionPath((ExpressionPath)expression, firstMatch);
  -
  -        case Expression.OP_FUNCTION:
  -            return function(((ExtensionFunction)expression).getFunctionName(),
  -                            ((ExtensionFunction)expression).getArguments());
  -        }
  -        return null;
  -    }
  -
  -    /**
  -     * Computes <code>"left | right"<code>
  -     */
  -    protected Object union(Expression left, Expression right){
  -        Object l = eval(left, false);
  -        Object r = eval(right, false);
  -        EvalContext lctx;
  -        if (l instanceof EvalContext){
  -            lctx = (EvalContext)l;
  -        }
  -        else {
  -            lctx = getRootContext().getConstantContext(l);
  -        }
  -        EvalContext rctx;
  -        if (r instanceof EvalContext){
  -            rctx = (EvalContext)r;
  -        }
  -        else {
  -            rctx = getRootContext().getConstantContext(r);
  -        }
  -        return new UnionContext(getRootContext(), new EvalContext[]{lctx, rctx});
  -    }
  -
  -    /**
  -     * Computes <code>"-arg"<code>
  -     */
  -    protected Object minus(Expression arg){
  -        double a = doubleValue(eval(arg));
  -        return new Double(-a);
  -    }
  -
  -    /**
  -     * Computes <code>"a + b + c + d"<code>
  -     */
  -    protected Object sum(Expression[] arguments){
  -        double s = 0.0;
  -        for (int i = 0; i < arguments.length; i++){
  -            s += doubleValue(eval(arguments[i]));
  -        }
  -        return new Double(s);
  -    }
  -
  -    /**
  -     * Computes <code>"left - right"<code>
  -     */
  -    protected Object minus(Expression left, Expression right){
  -        double l = doubleValue(eval(left));
  -        double r = doubleValue(eval(right));
  -        return new Double(l - r);
  -    }
  -
  -    /**
  -     * Computes <code>"left div right"<code>
  -     */
  -    protected Object div(Expression left, Expression right){
  -        double l = doubleValue(eval(left));
  -        double r = doubleValue(eval(right));
  -        return new Double(l/r);
  -    }
  -
  -    /**
  -     * Computes <code>"left * right"<code>
  -     */
  -    protected Object mult(Expression left, Expression right){
  -        double l = doubleValue(eval(left));
  -        double r = doubleValue(eval(right));
  -        return new Double(l*r);
  -    }
  -
  -    /**
  -     * Computes <code>"left mod right"<code>
  -     */
  -    protected Object mod(Expression left, Expression right){
  -        long l = (long)doubleValue(eval(left));
  -        long r = (long)doubleValue(eval(right));
  -        return new Double(l%r);
  -    }
  -
  -    /**
  -     * Computes <code>"left &lt; right"<code>
  -     */
  -    protected Object lt(Expression left, Expression right){
  -        double l = doubleValue(eval(left));
  -        double r = doubleValue(eval(right));
  -        return l < r ? Boolean.TRUE : Boolean.FALSE;
  -    }
  -
  -    /**
  -     * Computes <code>"left &gt; right"<code>
  -     */
  -    protected Object gt(Expression left, Expression right){
  -        double l = doubleValue(eval(left));
  -        double r = doubleValue(eval(right));
  -        return l > r ? Boolean.TRUE : Boolean.FALSE;
  -    }
  -
  -    /**
  -     * Computes <code>"left &lt;= right"<code>
  -     */
  -    protected Object lte(Expression left, Expression right){
  -        double l = doubleValue(eval(left));
  -        double r = doubleValue(eval(right));
  -        return l <= r ? Boolean.TRUE : Boolean.FALSE;
  -    }
  -
  -    /**
  -     * Computes <code>"left &gt;= right"<code>
  -     */
  -    protected Object gte(Expression left, Expression right){
  -        double l = doubleValue(eval(left));
  -        double r = doubleValue(eval(right));
  -        return l >= r ? Boolean.TRUE : Boolean.FALSE;
  -    }
  -
  -    /**
  -     * Computes <code>"left = right"<code>
  -     */
  -    protected Object eq(Expression left, Expression right){
  -        return equal(left, right) ? Boolean.TRUE : Boolean.FALSE;
  -    }
  -
  -    /**
  -     * Computes <code>"left != right"<code>
  -     */
  -    protected Object ne(Expression left, Expression right){
  -        return equal(left, right) ? Boolean.FALSE : Boolean.TRUE;
  -    }
  -
  -    /**
  -     * Compares two values
  -     */
  -    protected boolean equal(Expression left, Expression right){
  -        Object l = eval(left);
  -        Object r = eval(right);
  -        boolean result;
  -        if (l == r){
  -            return true;
  -        }
  -
  -        if (l instanceof EvalContext && r instanceof EvalContext){
  -            Set lset = new HashSet(((EvalContext)l).valueSet());
  -            Set rset = new HashSet(((EvalContext)r).valueSet());
  -            return lset.equals(rset);
  -        }
  -
  -        if (l instanceof EvalContext){
  -            l = ((EvalContext)l).getSingleNodePointer();
  -        }
  -        if (r instanceof EvalContext){
  -            r = ((EvalContext)r).getSingleNodePointer();
  -        }
  -
  -        if (l instanceof Pointer && r instanceof Pointer){
  -            if (l.equals(r)){
  -                return true;
  -            }
  -        }
  -
  -        if (l instanceof NodePointer){
  -            l = ((NodePointer)l).getValue();
  -        }
  -        if (r instanceof NodePointer){
  -            r = ((NodePointer)r).getValue();
  -        }
  -
  -        if (l instanceof Boolean || r instanceof Boolean){
  -            result = (booleanValue(l) == booleanValue(r));
  -        }
  -        else if (l instanceof Number || r instanceof Number){
  -            result = (doubleValue(l) == doubleValue(r));
  -        }
  -        else if (l instanceof String || r instanceof String){
  -            result = (stringValue(l).equals(stringValue(r)));
  -        }
  -        else if (l == null){
  -            return r == null;
  -        }
  -        else {
  -            result = l.equals(r);
  -        }
  -        return result;
  -    }
  -
  -    /**
  -     * Extracts all values from a context
  -     */
  -    private Set valueSet(){
  -        HashSet set = new HashSet();
  -        while(nextSet()){
  -            while(nextNode()){
  -                NodePointer pointer = getCurrentNodePointer();
  -                set.add(pointer.getValue());
  -            }
  -        }
  -        return set;
  -    }
  -
  -    /**
  -     * Computes <code>"left and right"<code>
  -     */
  -    protected Object and(Expression[] arguments){
  -        for (int i = 0; i < arguments.length; i++){
  -            if (!booleanValue(eval(arguments[i]))){
  -                return Boolean.FALSE;
  -            }
  -        }
  -        return Boolean.TRUE;
  -    }
  -
  -    /**
  -     * Computes <code>"left or right"<code>
  -     */
  -    protected Object or(Expression[] arguments){
  -        for (int i = 0; i < arguments.length; i++){
  -            if (booleanValue(eval(arguments[i]))){
  -                return Boolean.TRUE;
  -            }
  -        }
  -        return Boolean.FALSE;
  -    }
  -
  -    /**
  -     * Converts the supplied object to String
  -     */
  -    public static String stringValue(Object object){
  -        if (object instanceof String){
  -            return (String)object;
  -        }
  -        else if (object instanceof Number){
  -            return String.valueOf(((Number)object).doubleValue());
  -        }
  -        else if (object instanceof Boolean){
  -            return ((Boolean)object).booleanValue() ? "true" : "false";
  -        }
  -        else if (object == null){
  -            return "";
  -        }
  -        else if (object instanceof NodePointer){
  -            return stringValue(((NodePointer)object).getValue());
  -        }
  -        else if (object instanceof EvalContext){
  -            EvalContext ctx = (EvalContext)object;
  -            Pointer ptr = ctx.getSingleNodePointer();
  -            if (ptr != null){
  -                return stringValue(ptr);
  -            }
  -            return "";
  -        }
  -        return String.valueOf(object);
  -    }
  -
  -    /**
  -     * Converts the supplied object to Number
  -     */
  -    protected Number number(Object object){
  -        if (object instanceof Number){
  -            return (Number)object;
  -        }
  -        else if (object instanceof Boolean){
  -            return ((Boolean)object).booleanValue() ? ONE : ZERO;
  -        }
  -        else if (object instanceof String){
  -            Double value;
  -            try {
  -                value = new Double((String)object);
  -            }
  -            catch (NumberFormatException ex){
  -                value = NaN;
  -            }
  -            return value;
  -        }
  -        else if (object instanceof EvalContext){
  -            return number(stringValue(object));
  -        }
  -        else if (object instanceof NodePointer){
  -            return number(((NodePointer)object).getValue());
  -        }
  -//        else if (object instanceof Node){
  -//            System.err.println("HERE");
  -//            return number(stringValue(object));
  -//        }
  -        return ZERO;
  -    }
  -
  -    /**
  -     * Converts the supplied object to double
  -     */
  -    public static double doubleValue(Object object){
  -        if (object instanceof Number){
  -            return ((Number)object).doubleValue();
  -        }
  -        else if (object instanceof Boolean){
  -            return ((Boolean)object).booleanValue() ? 0.0 : 1.0;
  -        }
  -        else if (object instanceof String){
  -            if (object.equals("")){
  -                return 0.0;
  -            }
  -
  -            double value;
  -            try {
  -                value = Double.parseDouble((String)object);
  -            }
  -            catch (NumberFormatException ex){
  -                value = Double.NaN;
  -            }
  -            return value;
  -        }
  -        else if (object instanceof NodePointer){
  -            return doubleValue(((NodePointer)object).getValue());
  -        }
  -        else if (object instanceof EvalContext){
  -            return doubleValue(stringValue(object));
  -        }
  -        return 0;
  -    }
  -
  -    /**
  -     * Converts the supplied object to boolean
  -     */
  -    public static boolean booleanValue(Object object){
  -        if (object instanceof Number){
  -            double value = ((Number)object).doubleValue();
  -            return value != 0 && value != -0 && !Double.isNaN(value);
  -        }
  -        else if (object instanceof Boolean){
  -            return ((Boolean)object).booleanValue();
  -        }
  -        else if (object instanceof EvalContext){
  -            EvalContext ctx = (EvalContext)object;
  -            return ctx.nextSet() && ctx.nextNode();
  -        }
  -        else if (object instanceof String){
  -            return ((String)object).length() != 0;
  -        }
  -        else if (object instanceof NodePointer){
  -            return booleanValue(((NodePointer)object).getValue());
  -        }
  -        return false;
  -    }
  -
  -    /**
  -     * Walks a location path and finds a single node that matches the path
  -     */
  -    protected Pointer getSingleNodePointerForPath(LocationPath path) {
  -        // Create a chain of contexts
  -        EvalContext rootContext;
  -        if (path.isAbsolute()) {
  -            rootContext = getRootContext();
  -        }
  -        else {
  -            rootContext = this;
  -        }
  -        return getSingleNodePointerForSteps(
  -                    new InitialContext(rootContext), path);
  -    }
  -    /**
  -     * Walks a location path and returns a context containing all
  -     * nodes matching the path
  -     */
  -    protected EvalContext path(LocationPath path){
  -        // Create a chain of contexts
  -        EvalContext rootContext;
  -        if (path.isAbsolute()){
  -            rootContext = getRootContext();
  -        }
  -        else {
  -            rootContext = this;
  -        }
  -        return evalSteps(new InitialContext(rootContext), path);
  -    }
  -
  -    /**
  -     * Walks an expression path (a path that starts with an expression)
  -     */
  -    protected Object expressionPath(ExpressionPath path, boolean firstMatch){
  -        Expression expression = path.getExpression();
  -        Object value = eval(expression, false);
  -        EvalContext context;
  -        if (value instanceof InitialContext){
  -            // This is an optimization. We can avoid iterating through a collection
  -            // if the context bean is in fact one.
  -            context = (InitialContext)value;
  -        }
  -        else if (value instanceof EvalContext){
  -            // UnionContext will collect all values from the "value" context
  -            // and treat the whole thing as a big collection.
  -            context = new UnionContext(this, new EvalContext[]{(EvalContext)value});
  -        }
  -        else {
  -            context = getRootContext().getConstantContext(value);
  -        }
  -
  -        Expression predicates[] = path.getPredicates();
  -
  -        if (firstMatch &&
  -                path.getEvaluationHint(ExpressionPath.BASIC_PREDICATES_HINT).equals(Boolean.TRUE) &&
  -                !(context instanceof UnionContext)){
  -            EvalContext ctx = context;
  -            NodePointer ptr = (NodePointer)ctx.getSingleNodePointer();
  -            if (ptr != null &&
  -                    (ptr.getIndex() == NodePointer.WHOLE_COLLECTION ||
  -                     predicates == null || predicates.length == 0)){
  -                NodePointer pointer = SimplePathInterpreter.interpretPredicates(this, ptr, predicates);
  -                return SimplePathInterpreter.interpretPath(this, pointer, path.getSteps());
  -            }
  -        }
  -
  -        if (predicates != null){
  -            for (int j = 0; j < predicates.length; j++){
  -//                System.err.println("PREDICATE: " + predicates[j]);
  -                context = new PredicateContext(context, predicates[j]);
  -            }
  -        }
  -        if (firstMatch){
  -            return getSingleNodePointerForSteps(context, path);
  -        }
  -        else {
  -            return evalSteps(context, path);
  -        }
  -    }
  -
  -    /**
  -     * Given a root context, walks a path therefrom and finds the 
  -     * pointer to the first element matching the path.
  -     */
  -    private Pointer getSingleNodePointerForSteps(EvalContext context, Path path){
  -        Step steps[] = path.getSteps();
  -        if (steps.length == 0){
  -            return context.getSingleNodePointer();
  -        }
  -
  -        if (path.getEvaluationHint(Path.BASIC_PATH_HINT).equals(Boolean.TRUE)){
  -            NodePointer ptr = (NodePointer)context.getSingleNodePointer();
  -            return SimplePathInterpreter.interpretPath(this, ptr, steps);
  -        }
  -        else {
  -            for (int i = 0; i < steps.length; i++){
  -                context = createContextForStep(context, steps[i].getAxis(), steps[i].getNodeTest());
  -                Expression predicates[] = steps[i].getPredicates();
  -                if (predicates != null){
  -                    for (int j = 0; j < predicates.length; j++){
  -                        context = new PredicateContext(context, predicates[j]);
  -                    }
  -                }
  -            }
  -    
  -            return context.getSingleNodePointer();
  -        }
  -    }
  -
  -    /**
  -     * Given a root context, walks a path therefrom and builds a context
  -     * that contains all nodes matching the path.
  -     */
  -    private EvalContext evalSteps(EvalContext context, Path path){
  -        Step steps[] = path.getSteps();
  -        if (steps.length == 0){
  -            return context;
  -        }
  -
  -        for (int i = 0; i < steps.length; i++){
  -            context = createContextForStep(context, steps[i].getAxis(), steps[i].getNodeTest());
  -            Expression predicates[] = steps[i].getPredicates();
  -            if (predicates != null){
  -                for (int j = 0; j < predicates.length; j++){
  -                    context = new PredicateContext(context, predicates[j]);
  -                }
  -            }
  -        }
  -
  -        return context;
  -    }
  -
  -    /**
  -     * Different axes are serviced by different contexts. This method
  -     * allocates the right context for the supplied step.
  -     */
  -    protected EvalContext createContextForStep(EvalContext context, int axis, NodeTest nodeTest){
  -        switch(axis){
  -            case Compiler.AXIS_ANCESTOR:
  -                return new AncestorContext(context, false, nodeTest);
  -            case Compiler.AXIS_ANCESTOR_OR_SELF:
  -                return new AncestorContext(context, true, nodeTest);
  -            case Compiler.AXIS_ATTRIBUTE:
  -                return new AttributeContext(context, nodeTest);
  -            case Compiler.AXIS_CHILD:
  -                return new ChildContext(context, nodeTest, false, false);
  -            case Compiler.AXIS_DESCENDANT:
  -                return new DescendantContext(context, false, nodeTest);
  -            case Compiler.AXIS_DESCENDANT_OR_SELF:
  -                return new DescendantContext(context, true, nodeTest);
  -            case Compiler.AXIS_FOLLOWING:
  -                return new PrecedingOrFollowingContext(context, nodeTest, false);
  -            case Compiler.AXIS_FOLLOWING_SIBLING:
  -                return new ChildContext(context, nodeTest, true, false);
  -            case Compiler.AXIS_NAMESPACE:
  -                return new NamespaceContext(context, nodeTest);
  -            case Compiler.AXIS_PARENT:
  -                return new ParentContext(context, nodeTest);
  -            case Compiler.AXIS_PRECEDING:
  -                return new PrecedingOrFollowingContext(context, nodeTest, true);
  -            case Compiler.AXIS_PRECEDING_SIBLING:
  -                return new ChildContext(context, nodeTest, true, true);
  -            case Compiler.AXIS_SELF:
  -                return new SelfContext(context, nodeTest);
  -        }
  -        return null;        // Never happens
  -    }
  -
  -    /**
  -     * Computes an extension function
  -     */
  -    protected Object function(QName functionName, Expression[] arguments){
  -        Object[] parameters = null;
  -        if (arguments != null){
  -            parameters = new Object[arguments.length];
  -            for (int i = 0; i < arguments.length; i++){
  -                Object param = eval(arguments[i], false);
  -                parameters[i] = param;
  -            }
  -        }
  -        Function function = getRootContext().getFunction(functionName, parameters);
  -        if (function == null){
  -            throw new JXPathException("No such function: " + functionName +
  -                 Arrays.asList(parameters));
  -        }
  -
  -        return function.invoke(this, parameters);
  -    }
  -
  -    /**
  -     * Computes a built-in function
  -     */
  -    protected Object coreFunction(CoreFunction function){
  -        int code = function.getFunctionCode();
  -        switch(code){
  -            case Compiler.FUNCTION_LAST:                return functionLast(function);
  -            case Compiler.FUNCTION_POSITION:            return functionPosition(function);
  -            case Compiler.FUNCTION_COUNT:               return functionCount(function);
  -            case Compiler.FUNCTION_LANG:                return functionLang(function);
  -            case Compiler.FUNCTION_ID:
  -            {
  -                System.err.println("UNIMPLEMENTED: " + function);
  -                return null;
  -            }
  -            case Compiler.FUNCTION_LOCAL_NAME:          return functionLocalName(function);
  -            case Compiler.FUNCTION_NAMESPACE_URI:       return functionNamespaceURI(function);
  -            case Compiler.FUNCTION_NAME:                return functionName(function);
  -            case Compiler.FUNCTION_STRING:              return functionString(function);
  -            case Compiler.FUNCTION_CONCAT:              return functionConcat(function);
  -            case Compiler.FUNCTION_STARTS_WITH:         return functionStartsWith(function);
  -            case Compiler.FUNCTION_CONTAINS:            return functionContains(function);
  -            case Compiler.FUNCTION_SUBSTRING_BEFORE:    return functionSubstringBefore(function);
  -            case Compiler.FUNCTION_SUBSTRING_AFTER:     return functionSubstringAfter(function);
  -            case Compiler.FUNCTION_SUBSTRING:           return functionSubstring(function);
  -            case Compiler.FUNCTION_STRING_LENGTH:       return functionStringLength(function);
  -            case Compiler.FUNCTION_NORMALIZE_SPACE:     return functionNormalizeSpace(function);
  -            case Compiler.FUNCTION_TRANSLATE:           return functionTranslate(function);
  -            case Compiler.FUNCTION_BOOLEAN:             return functionBoolean(function);
  -            case Compiler.FUNCTION_NOT:                 return functionNot(function);
  -            case Compiler.FUNCTION_TRUE:                return functionTrue(function);
  -            case Compiler.FUNCTION_FALSE:               return functionFalse(function);
  -            case Compiler.FUNCTION_NULL:                return functionNull(function);
  -            case Compiler.FUNCTION_NUMBER:              return functionNumber(function);
  -            case Compiler.FUNCTION_SUM:                 return functionSum(function);
  -            case Compiler.FUNCTION_FLOOR:               return functionFloor(function);
  -            case Compiler.FUNCTION_CEILING:             return functionCeiling(function);
  -            case Compiler.FUNCTION_ROUND:               return functionRound(function);
  -//            case Compiler.FUNCTION_KEY:
  -//                System.err.println("UNIMPLEMENTED: " + function);
  -        }
  -        return null;
  -    }
  -
  -    protected Object functionLast(CoreFunction function){
  -        assertArgCount(function, 0);
  -        // Move the position to the beginning and iterate through
  -        // the context to count nodes.
  -        int old = getCurrentPosition();
  -        reset();
  -        int count = 0;
  -        while(nextNode()){
  -            count++;
  -        }
  -
  -        // Restore the current position.
  -        if (old != 0){
  -            setPosition(old);
  -        }
  -        return new Double(count);
  -    }
  -
  -    protected Object functionPosition(CoreFunction function){
  -        assertArgCount(function, 0);
  -        return new Integer(getCurrentPosition());
  -    }
  -
  -    protected Object functionCount(CoreFunction function){
  -        assertArgCount(function, 1);
  -        Expression arg1 = function.getArg1();
  -        int count = 0;
  -        Object value = eval(arg1, false);
  -        if (value instanceof NodePointer){
  -            value = ((NodePointer)value).getValue();
  -        }
  -        if (value instanceof EvalContext){
  -            EvalContext ctx = (EvalContext)value;
  -            while(ctx.nextSet()){
  -                while(ctx.nextNode()){
  -                    count++;
  -                }
  -            }
  -        }
  -        else if (value instanceof Collection){
  -            count = ((Collection)value).size();
  -        }
  -        else if (value == null){
  -            count = 0;
  -        }
  -        else {
  -            count = 1;
  -        }
  -        return new Double(count);
  -    }
  -
  -    protected Object functionLang(CoreFunction function){
  -        assertArgCount(function, 1);
  -        String lang = stringValue(eval(function.getArg1()));
  -        NodePointer pointer = (NodePointer)getSingleNodePointer();
  -        if (pointer == null){
  -            return Boolean.FALSE;
  -        }
  -        return pointer.isLanguage(lang) ? Boolean.TRUE: Boolean.FALSE;
  -    }
  -
  -    protected Object functionNamespaceURI(CoreFunction function){
  -        if (function.getArgumentCount() == 0){
  -            return getCurrentNodePointer();
  -        }
  -        assertArgCount(function, 1);
  -        Object set = eval(function.getArg1(), false);
  -        if (set instanceof EvalContext){
  -            EvalContext ctx = (EvalContext)set;
  -            if (ctx.nextSet() && ctx.nextNode()){
  -                String str = ctx.getCurrentNodePointer().getNamespaceURI();
  -                return str == null ? "" : str;
  -            }
  -        }
  -        return "";
  -    }
  -
  -    protected Object functionLocalName(CoreFunction function){
  -        if (function.getArgumentCount() == 0){
  -            return getCurrentNodePointer();
  -        }
  -        assertArgCount(function, 1);
  -        Object set = eval(function.getArg1(), false);
  -        if (set instanceof EvalContext){
  -            EvalContext ctx = (EvalContext)set;
  -            if (ctx.nextSet() && ctx.nextNode()){
  -                return ctx.getCurrentNodePointer().getName().getName();
  -            }
  -        }
  -        return "";
  -    }
  -
  -    protected Object functionName(CoreFunction function){
  -        if (function.getArgumentCount() == 0){
  -            return getCurrentNodePointer();
  -        }
  -        assertArgCount(function, 1);
  -        Object set = eval(function.getArg1(), false);
  -        if (set instanceof EvalContext){
  -            EvalContext ctx = (EvalContext)set;
  -            if (ctx.nextSet() && ctx.nextNode()){
  -                return ctx.getCurrentNodePointer().getExpandedName().toString();
  -            }
  -        }
  -        return "";
  -    }
  -
  -    protected Object functionString(CoreFunction function){
  -        if (function.getArgumentCount() == 0){
  -            return stringValue(getCurrentNodePointer());
  -        }
  -        assertArgCount(function, 1);
  -        return stringValue(eval(function.getArg1()));
  -    }
  -
  -    protected Object functionConcat(CoreFunction function){
  -        if (function.getArgumentCount() < 2){
  -            assertArgCount(function, 2);
  -        }
  -        StringBuffer buffer = new StringBuffer();
  -        Expression args[] = function.getArguments();
  -        for (int i = 0; i < args.length; i++){
  -            buffer.append(stringValue(eval(args[i])));
  -        }
  -        return buffer.toString();
  -    }
  -
  -    protected Object functionStartsWith(CoreFunction function){
  -        assertArgCount(function, 2);
  -        String s1 = stringValue(eval(function.getArg1()));
  -        String s2 = stringValue(eval(function.getArg2()));
  -        return s1.startsWith(s2) ? Boolean.TRUE : Boolean.FALSE;
  -    }
  -
  -    protected Object functionContains(CoreFunction function){
  -        assertArgCount(function, 2);
  -        String s1 = stringValue(eval(function.getArg1()));
  -        String s2 = stringValue(eval(function.getArg2()));
  -        return s1.indexOf(s2) != -1 ? Boolean.TRUE : Boolean.FALSE;
  -    }
  -
  -    protected Object functionSubstringBefore(CoreFunction function){
  -        assertArgCount(function, 2);
  -        String s1 = stringValue(eval(function.getArg1()));
  -        String s2 = stringValue(eval(function.getArg2()));
  -        int index = s1.indexOf(s2);
  -        if (index == -1){
  -            return "";
  -        }
  -        return s1.substring(0, index);
  -    }
  -
  -    protected Object functionSubstringAfter(CoreFunction function){
  -        assertArgCount(function, 2);
  -        String s1 = stringValue(eval(function.getArg1()));
  -        String s2 = stringValue(eval(function.getArg2()));
  -        int index = s1.indexOf(s2);
  -        if (index == -1){
  -            return "";
  -        }
  -        return s1.substring(index + s2.length());
  -    }
  -
  -    protected Object functionSubstring(CoreFunction function){
  -        int ac = function.getArgumentCount();
  -        if (ac != 2 && ac != 3){
  -            assertArgCount(function, 2);
  -        }
  -
  -        String s1 = stringValue(eval(function.getArg1()));
  -        double from = doubleValue(eval(function.getArg2()));
  -        if (Double.isNaN(from)){
  -            return "";
  -        }
  -
  -        from = Math.round(from);
  -        if (ac == 2){
  -            if (from < 1){
  -                from = 1;
  -            }
  -            return s1.substring((int)from - 1);
  -        }
  -        else {
  -            double length = doubleValue(eval(function.getArg3()));
  -            length = Math.round(length);
  -            if (length < 0){
  -                return "";
  -            }
  -
  -            double to = from + length;
  -            if (to < 1){
  -                return "";
  -            }
  -
  -            if (to > s1.length() + 1){
  -                if (from < 1){
  -                    from = 1;
  -                }
  -                return s1.substring((int)from - 1);
  -            }
  -
  -            if (from < 1){
  -                from = 1;
  -            }
  -            return s1.substring((int)from - 1, (int)(to - 1));
  -        }
  -    }
  -
  -    protected Object functionStringLength(CoreFunction function){
  -        String s;
  -        if (function.getArgumentCount() == 0){
  -            s = stringValue(getCurrentNodePointer());
  -        }
  -        else {
  -            assertArgCount(function, 1);
  -            s = stringValue(eval(function.getArg1()));
  -        }
  -        return new Double(s.length());
  -    }
  -
  -    protected Object functionNormalizeSpace(CoreFunction function){
  -        assertArgCount(function, 1);
  -        String s = stringValue(eval(function.getArg1()));
  -        char chars[] = s.toCharArray();
  -        int out = 0;
  -        int phase = 0;
  -        for (int in = 0; in < chars.length; in++){
  -            switch(chars[in]){
  -                case 0x20:
  -                case 0x9:
  -                case 0xD:
  -                case 0xA:
  -                    if (phase == 0){      // beginning
  -                        ;
  -                    }
  -                    else if (phase == 1){ // non-space
  -                        phase = 2;
  -                        chars[out++] = ' ';
  -                    }
  -                    break;
  -                default:
  -                    chars[out++] = chars[in];
  -                    phase = 1;
  -            }
  -        }
  -        if (phase == 2){ // trailing-space
  -            out--;
  -        }
  -        return new String(chars, 0, out);
  -    }
  -
  -    protected Object functionTranslate(CoreFunction function){
  -        assertArgCount(function, 3);
  -        String s1 = stringValue(eval(function.getArg1()));
  -        String s2 = stringValue(eval(function.getArg2()));
  -        String s3 = stringValue(eval(function.getArg3()));
  -        char chars[] = s1.toCharArray();
  -        int out = 0;
  -        for (int in = 0; in < chars.length; in++){
  -            char c = chars[in];
  -            int inx = s2.indexOf(c);
  -            if (inx != -1){
  -                if (inx < s3.length()){
  -                    chars[out++] = s3.charAt(inx);
  -                }
  -            }
  -            else {
  -                chars[out++] = c;
  -            }
  -        }
  -        return new String(chars, 0, out);
  -    }
  -
  -    protected Object functionBoolean(CoreFunction function){
  -        assertArgCount(function, 1);
  -        return booleanValue(eval(function.getArg1())) ? Boolean.TRUE : Boolean.FALSE;
  -    }
  -
  -    protected Object functionNot(CoreFunction function){
  -        assertArgCount(function, 1);
  -        return booleanValue(eval(function.getArg1())) ? Boolean.FALSE : Boolean.TRUE;
  -    }
  -
  -    protected Object functionTrue(CoreFunction function){
  -        assertArgCount(function, 0);
  -        return Boolean.TRUE;
  -    }
  -
  -    protected Object functionFalse(CoreFunction function){
  -        assertArgCount(function, 0);
  -        return Boolean.FALSE;
  -    }
  -
  -    protected Object functionNull(CoreFunction function){
  -        assertArgCount(function, 0);
  -        return new NullPointer(null, getRootContext().getCurrentNodePointer().getLocale());
  -    }
  -
  -    protected Object functionNumber(CoreFunction function){
  -        if (function.getArgumentCount() == 0){
  -            return number(getCurrentNodePointer());
  -        }
  -        assertArgCount(function, 1);
  -        return number(eval(function.getArg1()));
  -    }
  -
  -    protected Object functionSum(CoreFunction function){
  -        assertArgCount(function, 1);
  -        Object v = eval(function.getArg1(), false);
  -        if (v == null){
  -            return ZERO;
  -        }
  -        else if (v instanceof EvalContext){
  -            double sum = 0.0;
  -            EvalContext ctx = (EvalContext)v;
  -            while (ctx.nextSet()){
  -                while (ctx.nextNode()){
  -                    sum += doubleValue(ctx.getCurrentNodePointer());
  -                }
  -            }
  -            return new Double(sum);
  -        }
  -        throw new JXPathException("Invalid argument type for 'sum': "
  -            + v.getClass().getName());
  -    }
  -
  -    protected Object functionFloor(CoreFunction function){
  -        assertArgCount(function, 1);
  -        double v = doubleValue(eval(function.getArg1()));
  -        return new Double(Math.floor(v));
  -    }
  -
  -    protected Object functionCeiling(CoreFunction function){
  -        assertArgCount(function, 1);
  -        double v = doubleValue(eval(function.getArg1()));
  -        return new Double(Math.ceil(v));
  -    }
  -
  -    protected Object functionRound(CoreFunction function){
  -        assertArgCount(function, 1);
  -        double v = doubleValue(eval(function.getArg1()));
  -        return new Double(Math.round(v));
  -    }
  -
  -    private void assertArgCount(CoreFunction function, int count){
  -        if (function.getArgumentCount() != count){
  -            throw new JXPathException("Incorrect number of argument: "
  -                + function);
  -        }
  -    }
  -    
  -    public static class PointerIterator implements Iterator {
  -        private Iterator iterator;
  -        private QName qname;
  -        private Locale locale;
  -        
  -        public PointerIterator(Iterator it, QName qname, Locale locale){
  -            this.iterator = it;
  -            this.qname = qname;
  -            this.locale = locale;
  -        }
  -        
  -        public boolean hasNext(){
  -            return iterator.hasNext();
  -        }
  -        
  -        public Object next(){
  -            Object o = iterator.next();            
  -            return NodePointer.newNodePointer(qname, o, locale);
  -        }
  -        
  -        public void remove(){
  -            throw new UnsupportedOperationException();
  -        }
  -    }
  -    
  -    public static class ValueIterator implements Iterator {
  -        private Iterator iterator;
  -        
  -        public ValueIterator(Iterator it){
  -            this.iterator = it;
  -        }
  -        
  -        public boolean hasNext(){
  -            return iterator.hasNext();
  -        }
  -        
  -        public Object next(){
  -            Object o = iterator.next();
  -            if (o instanceof Pointer){
  -                return ((Pointer)o).getValue();
  -            }
  -            return o;
  -        }
  -        
  -        public void remove(){
  -            throw new UnsupportedOperationException();
  -        }
       }
   }
  
  
  
  1.1                  jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/InfoSetUtil.java
  
  Index: InfoSetUtil.java
  ===================================================================
  /*
   * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/InfoSetUtil.java,v 1.1 2002/05/08 00:40:00 dmitri Exp $
   * $Revision: 1.1 $
   * $Date: 2002/05/08 00:40:00 $
   *
   * ====================================================================
   * The Apache Software License, Version 1.1
   *
   *
   * Copyright (c) 1999-2001 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "Commons", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation and was
   * originally based on software copyright (c) 2001, Plotnix, Inc,
   * <http://www.plotnix.com/>.
   * For more information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  package org.apache.commons.jxpath.ri;
  
  import org.apache.commons.jxpath.Pointer;
  import org.apache.commons.jxpath.ri.model.NodePointer;
  
  /**
   * @author Dmitri Plotnikov
   * @version $Revision: 1.1 $ $Date: 2002/05/08 00:40:00 $
   */
  public class InfoSetUtil {
  
      private static final Double ZERO = new Double(0);
      private static final Double ONE = new Double(1);
      private static final Double NaN = new Double(Double.NaN);
  
  
      /**
       * Converts the supplied object to String
       */
      public static String stringValue(Object object){
          if (object instanceof String){
              return (String)object;
          }
          else if (object instanceof Number){
              return String.valueOf(((Number)object).doubleValue());
          }
          else if (object instanceof Boolean){
              return ((Boolean)object).booleanValue() ? "true" : "false";
          }
          else if (object == null){
              return "";
          }
          else if (object instanceof NodePointer){
              return stringValue(((NodePointer)object).getValue());
          }
          else if (object instanceof EvalContext){
              EvalContext ctx = (EvalContext)object;
              Pointer ptr = ctx.getSingleNodePointer();
              if (ptr != null){
                  return stringValue(ptr);
              }
              return "";
          }
          return String.valueOf(object);
      }
  
      /**
       * Converts the supplied object to Number
       */
      public static Number number(Object object){
          if (object instanceof Number){
              return (Number)object;
          }
          else if (object instanceof Boolean){
              return ((Boolean)object).booleanValue() ? ONE : ZERO;
          }
          else if (object instanceof String){
              Double value;
              try {
                  value = new Double((String)object);
              }
              catch (NumberFormatException ex){
                  value = NaN;
              }
              return value;
          }
          else if (object instanceof EvalContext){
              return number(stringValue(object));
          }
          else if (object instanceof NodePointer){
              return number(((NodePointer)object).getValue());
          }
          return ZERO;
      }
  
      /**
       * Converts the supplied object to double
       */
      public static double doubleValue(Object object){
          if (object instanceof Number){
              return ((Number)object).doubleValue();
          }
          else if (object instanceof Boolean){
              return ((Boolean)object).booleanValue() ? 0.0 : 1.0;
          }
          else if (object instanceof String){
              if (object.equals("")){
                  return 0.0;
              }
  
              double value;
              try {
                  value = Double.parseDouble((String)object);
              }
              catch (NumberFormatException ex){
                  value = Double.NaN;
              }
              return value;
          }
          else if (object instanceof NodePointer){
              return doubleValue(((NodePointer)object).getValue());
          }
          else if (object instanceof EvalContext){
              return doubleValue(stringValue(object));
          }
          return 0;
      }
  
      /**
       * Converts the supplied object to boolean
       */
      public static boolean booleanValue(Object object){
          if (object instanceof Number){
              double value = ((Number)object).doubleValue();
              return value != 0 && value != -0 && !Double.isNaN(value);
          }
          else if (object instanceof Boolean){
              return ((Boolean)object).booleanValue();
          }
          else if (object instanceof EvalContext){
              EvalContext ctx = (EvalContext)object;
              return ctx.nextSet() && ctx.nextNode();
          }
          else if (object instanceof String){
              return ((String)object).length() != 0;
          }
          else if (object instanceof NodePointer){
              return booleanValue(((NodePointer)object).getValue());
          }
          return false;
      }
  }
  
  
  1.4       +6 -6      jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/model/dom/DOMAttributePointer.java
  
  Index: DOMAttributePointer.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/model/dom/DOMAttributePointer.java,v
  retrieving revision 1.3
  retrieving revision 1.4
  diff -u -r1.3 -r1.4
  --- DOMAttributePointer.java	26 Apr 2002 01:00:38 -0000	1.3
  +++ DOMAttributePointer.java	8 May 2002 00:40:00 -0000	1.4
  @@ -1,7 +1,7 @@
   /*
  - * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/model/dom/DOMAttributePointer.java,v 1.3 2002/04/26 01:00:38 dmitri Exp $
  - * $Revision: 1.3 $
  - * $Date: 2002/04/26 01:00:38 $
  + * $Header: /home/cvs/jakarta-commons/jxpath/src/java/org/apache/commons/jxpath/ri/model/dom/DOMAttributePointer.java,v 1.4 2002/05/08 00:40:00 dmitri Exp $
  + * $Revision: 1.4 $
  + * $Date: 2002/05/08 00:40:00 $
    *
    * ====================================================================
    * The Apache Software License, Version 1.1
  @@ -73,7 +73,7 @@
    * A Pointer that points to a DOM node.
    *
    * @author Dmitri Plotnikov
  - * @version $Revision: 1.3 $ $Date: 2002/04/26 01:00:38 $
  + * @version $Revision: 1.4 $ $Date: 2002/05/08 00:40:00 $
    */
   public class DOMAttributePointer extends NodePointer {
       private Attr attr;
  @@ -164,9 +164,9 @@
           DOMAttributePointer other = (DOMAttributePointer)object;
           return attr == other.attr;
       }
  -    
  +
       public int compareChildNodePointers(NodePointer pointer1, NodePointer pointer2){
           // Won't happen - attributes don't have children
           return 0;
  -    }    
  +    }
   }
  
  
  

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