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From mben...@apache.org
Subject cvs commit: ant/src/main/org/apache/tools/ant ComponentHelper.java
Date Wed, 26 Jan 2005 20:14:58 GMT
mbenson     2005/01/26 12:14:58

  Modified:    src/main/org/apache/tools/ant Tag: ANT_16_BRANCH
                        ComponentHelper.java
  Log:
  Sync with HEAD
  
  Revision  Changes    Path
  No                   revision
  No                   revision
  1.28.2.8  +77 -120   ant/src/main/org/apache/tools/ant/ComponentHelper.java
  
  Index: ComponentHelper.java
  ===================================================================
  RCS file: /home/cvs/ant/src/main/org/apache/tools/ant/ComponentHelper.java,v
  retrieving revision 1.28.2.7
  retrieving revision 1.28.2.8
  diff -u -r1.28.2.7 -r1.28.2.8
  --- ComponentHelper.java	14 Apr 2004 15:42:40 -0000	1.28.2.7
  +++ ComponentHelper.java	26 Jan 2005 20:14:58 -0000	1.28.2.8
  @@ -1,5 +1,5 @@
   /*
  - * Copyright  2003-2004 The Apache Software Foundation
  + * Copyright  2003-2005 The Apache Software Foundation
    *
    *  Licensed under the Apache License, Version 2.0 (the "License");
    *  you may not use this file except in compliance with the License.
  @@ -85,10 +85,10 @@
       private Project project;
   
       /**
  -     * find a project component for a specific project, creating
  -     * it if it does not exist
  -     * @param project the project
  -     * @return the project component for a specific project
  +     * Find a project component for a specific project, creating
  +     * it if it does not exist.
  +     * @param project the project.
  +     * @return the project component for a specific project.
        */
       public static ComponentHelper getComponentHelper(Project project) {
           // Singleton for now, it may change ( per/classloader )
  @@ -111,27 +111,27 @@
       }
   
       /**
  -     * Set the next chained component helper
  +     * Set the next chained component helper.
        *
  -     * @param next the next chained component helper
  +     * @param next the next chained component helper.
        */
       public void setNext(ComponentHelper next) {
           this.next = next;
       }
   
       /**
  -     * Get the next chained component helper
  +     * Get the next chained component helper.
        *
  -     * @return the next chained component helper
  +     * @return the next chained component helper.
        */
       public ComponentHelper getNext() {
           return next;
       }
   
       /**
  -     * Sets the project for this component helper
  +     * Sets the project for this component helper.
        *
  -     * @param project the project for this helper
  +     * @param project the project for this helper.
        */
       public void setProject(Project project) {
           this.project = project;
  @@ -142,7 +142,7 @@
        * Used with creating child projects. Each child
        * project inherits the component definitions
        * from its parent.
  -     * @param helper the component helper of the parent project
  +     * @param helper the component helper of the parent project.
        */
       public void initSubProject(ComponentHelper helper) {
           // add the types of the parent project
  @@ -157,26 +157,23 @@
           }
       }
   
  -    /** Factory method to create the components.
  +    /**
  +     * Factory method to create the components.
        *
        * This should be called by UnknownElement.
        *
  -     * @param ue The Unknown Element creating this component
  -     * @param ns Namespace URI. Also available as ue.getNamespace()
  +     * @param ue The Unknown Element creating this component.
  +     * @param ns Namespace URI. Also available as ue.getNamespace().
        * @param componentType The component type,
  -     *                       Also available as ue.getComponentName()
  -     * @return the created component
  -     * @throws BuildException if an error occurs
  +     *                       Also available as ue.getComponentName().
  +     * @return the created component.
  +     * @throws BuildException if an error occurs.
        */
       public Object createComponent(UnknownElement ue,
                                     String ns,
                                     String componentType)
           throws BuildException {
           Object component = createComponent(componentType);
  -        if (component == null) {
  -            return null;
  -        }
  -
           if (component instanceof Task) {
               Task task = (Task) component;
               task.setLocation(ue.getLocation());
  @@ -186,7 +183,6 @@
               task.init();
               addCreatedTask(componentType, task);
           }
  -
           return component;
       }
   
  @@ -195,15 +191,12 @@
        *
        * @param componentName the name of the component, if
        *                      the component is in a namespace, the
  -     *                      name is prefixed with the namespace uri and ":"
  +     *                      name is prefixed with the namespace uri and ":".
        * @return the class if found or null if not.
        */
       public Object createComponent(String componentName) {
           AntTypeDefinition def = getDefinition(componentName);
  -        if (def == null) {
  -            return null;
  -        }
  -        return def.create(project);
  +        return (def == null) ? null : def.create(project);
       }
   
       /**
  @@ -211,27 +204,22 @@
        *
        * @param componentName the name of the component, if
        *                      the component is in a namespace, the
  -     *                      name is prefixed with the namespace uri and ":"
  +     *                      name is prefixed with the namespace uri and ":".
        * @return the class if found or null if not.
        */
       public Class getComponentClass(String componentName) {
           AntTypeDefinition def = getDefinition(componentName);
  -        if (def == null) {
  -            return null;
  -        }
  -        return def.getExposedClass(project);
  +        return (def == null) ? null : def.getExposedClass(project);
       }
   
       /**
  -     * Return the antTypeDefinition for a componentName
  -     * @param componentName the name of the component
  -     * @return the ant definition or null if not present
  +     * Return the antTypeDefinition for a componentName.
  +     * @param componentName the name of the component.
  +     * @return the ant definition or null if not present.
        */
       public AntTypeDefinition getDefinition(String componentName) {
           checkNamespace(componentName);
  -        AntTypeDefinition ret = null;
  -        ret = antTypeTable.getDefinition(componentName);
  -        return ret;
  +        return antTypeTable.getDefinition(componentName);
       }
   
       /**
  @@ -300,7 +288,7 @@
               throw new BuildException(message);
           }
           try {
  -            taskClass.getConstructor(null);
  +            taskClass.getConstructor((Class[]) null);
               // don't have to check for public, since
               // getConstructor finds public constructors only.
           } catch (NoSuchMethodException e) {
  @@ -397,15 +385,14 @@
           def.setName(typeName);
           def.setClass(typeClass);
           updateDataTypeDefinition(def);
  -        String msg = " +User datatype: " + typeName + "     "
  -                + typeClass.getName();
  -        project.log(msg, Project.MSG_DEBUG);
  +        project.log(" +User datatype: " + typeName + "     "
  +                + typeClass.getName(), Project.MSG_DEBUG);
       }
   
       /**
        * Describe <code>addDataTypeDefinition</code> method here.
        *
  -     * @param def an <code>AntTypeDefinition</code> value
  +     * @param def an <code>AntTypeDefinition</code> value.
        */
       public void addDataTypeDefinition(AntTypeDefinition def) {
           updateDataTypeDefinition(def);
  @@ -448,7 +435,6 @@
                                 org.apache.tools.ant.taskdefs.Property.class);
               task = createNewTask(taskType);
           }
  -
           if (task != null) {
               addCreatedTask(taskType, task);
           }
  @@ -470,11 +456,7 @@
        */
       private Task createNewTask(String taskType) throws BuildException {
           Class c = getComponentClass(taskType);
  -        if (c == null) {
  -            return null;
  -        }
  -
  -        if (!(Task.class.isAssignableFrom(c))) {
  +        if (c == null || !(Task.class.isAssignableFrom(c))) {
               return null;
           }
           Task task = (Task) createComponent(taskType);
  @@ -486,8 +468,7 @@
           // set default value, can be changed by the user
           task.setTaskName(taskType);
   
  -        String msg = "   +Task: " + taskType;
  -        project.log (msg, Project.MSG_DEBUG);
  +        project.log("   +Task: " + taskType, Project.MSG_DEBUG);
           return task;
       }
   
  @@ -525,8 +506,7 @@
               if (v != null) {
                   Enumeration taskEnum = v.elements();
                   while (taskEnum.hasMoreElements()) {
  -                    WeakReference ref =
  -                            (WeakReference) taskEnum.nextElement();
  +                    WeakReference ref = (WeakReference) taskEnum.nextElement();
                       Task t = (Task) ref.get();
                       //being a weak ref, it may be null by this point
                       if (t != null) {
  @@ -563,7 +543,7 @@
        * @param element The element to describe.
        *                Must not be <code>null</code>.
        *
  -     * @return a description of the element type
  +     * @return a description of the element type.
        *
        * @since Ant 1.6
        */
  @@ -583,39 +563,34 @@
   
   
       /**
  -     * check if definition is a valid definition - it
  +     * Check if definition is a valid definition - it
        * may be a definition of an optional task that
  -     * does not exist
  -     * @param def the definition to test
  -     * @return true if exposed type of definition is present
  +     * does not exist.
  +     * @param def the definition to test.
  +     * @return true if exposed type of definition is present.
        */
       private boolean validDefinition(AntTypeDefinition def) {
  -        if (def.getTypeClass(project) == null
  -            || def.getExposedClass(project) == null) {
  -            return false;
  -        }
  -        return true;
  +        return !(def.getTypeClass(project) == null
  +            || def.getExposedClass(project) == null);
       }
   
       /**
  -     * check if two definitions are the same
  -     * @param def  the new definition
  -     * @param old the old definition
  -     * @return true if the two definitions are the same
  +     * Check if two definitions are the same.
  +     * @param def  the new definition.
  +     * @param old the old definition.
  +     * @return true if the two definitions are the same.
        */
       private boolean sameDefinition(
           AntTypeDefinition def, AntTypeDefinition old) {
  -        if (!validDefinition(def) || !validDefinition(old)) {
  -            return validDefinition(def) == validDefinition(old);
  -        }
  -        return def.sameDefinition(old, project);
  +        boolean defValid = validDefinition(def);
  +        boolean sameValidity = !(defValid ^ validDefinition(old));
  +        return sameValidity && (!defValid || def.sameDefinition(old, project));
       }
   
  -
       /**
  -     * update the component definition table with a new or
  +     * Update the component definition table with a new or
        * modified definition.
  -     * @param def the definition to update or insert
  +     * @param def the definition to update or insert.
        */
       private void updateDataTypeDefinition(AntTypeDefinition def) {
           String name = def.getName();
  @@ -627,17 +602,13 @@
                   if (sameDefinition(def, old)) {
                       return;
                   }
  -                int logLevel = Project.MSG_WARN;
  -                if (def.similarDefinition(old, project)) {
  -                    logLevel = Project.MSG_VERBOSE;
  -                }
                   Class oldClass = antTypeTable.getExposedClass(name);
                   boolean isTask =
                       (oldClass != null && Task.class.isAssignableFrom(oldClass));
  -                project.log(
  -                    "Trying to override old definition of "
  -                    + (isTask ? "task" : "datatype")
  -                    + " " + name, logLevel);
  +                project.log("Trying to override old definition of "
  +                    + (isTask ? "task " : "datatype ") + name,
  +                    (def.similarDefinition(old, project))
  +                    ? Project.MSG_VERBOSE : Project.MSG_WARN);
                   if (isTask) {
                       invalidateCreatedTasks(name);
                   }
  @@ -649,8 +620,8 @@
       }
   
       /**
  -     * Called at the start of processing an antlib
  -     * @param uri the uri that is associated with this antlib
  +     * Called at the start of processing an antlib.
  +     * @param uri the uri that is associated with this antlib.
        */
       public void enterAntLib(String uri) {
           antLibCurrentUri = uri;
  @@ -658,26 +629,23 @@
       }
   
       /**
  -     * @return the current antlib uri
  +     * @return the current antlib uri.
        */
       public String getCurrentAntlibUri() {
           return antLibCurrentUri;
       }
   
       /**
  -     * Called at the end of processing an antlib
  +     * Called at the end of processing an antlib.
        */
       public void exitAntLib() {
           antLibStack.pop();
  -        if (antLibStack.size() != 0) {
  -            antLibCurrentUri = (String) antLibStack.peek();
  -        } else {
  -            antLibCurrentUri = null;
  -        }
  +        antLibCurrentUri = (antLibStack.size() == 0)
  +            ? null : (String) antLibStack.peek();
       }
   
       /**
  -     * load ant's tasks
  +     * Load ant's tasks.
        */
       private void initTasks() {
           ClassLoader classLoader = null;
  @@ -722,7 +690,7 @@
       }
   
       /**
  -     * load ant's datatypes
  +     * Load ant's datatypes.
        */
       private void initTypes() {
           ClassLoader classLoader = null;
  @@ -765,15 +733,14 @@
       }
   
       /**
  -     * called for each component name, check if the
  +     * Called for each component name, check if the
        * associated URI has been examined for antlibs.
        */
       private synchronized void checkNamespace(String componentName) {
  -        if (componentName.indexOf(':') == -1) {
  -            return; // not a namespaced name
  -        }
  -
           String uri = ProjectHelper.extractUriFromComponentName(componentName);
  +        if ("".equals(uri)) {
  +            uri = ProjectHelper.ANT_CORE_URI;
  +        }
           if (!uri.startsWith(ProjectHelper.ANTLIB_URI)) {
               return; // namespace that does not contain antlib
           }
  @@ -794,7 +761,7 @@
       }
   
       /**
  -     * map that contains the component definitions
  +     * Map that contains the component definitions.
        */
       private static class AntTypeTable extends Hashtable {
           private Project project;
  @@ -804,8 +771,7 @@
           }
   
           public AntTypeDefinition getDefinition(String key) {
  -            AntTypeDefinition ret = (AntTypeDefinition) super.get(key);
  -            return ret;
  +            return (AntTypeDefinition) (super.get(key));
           }
   
           /** Equivalent to getTypeType */
  @@ -815,37 +781,28 @@
   
           public Object create(String name) {
               AntTypeDefinition def = getDefinition(name);
  -            if (def == null) {
  -                return null;
  -            }
  -            return def.create(project);
  +            return (def == null) ? null : def.create(project);
           }
   
           public Class getTypeClass(String name) {
               AntTypeDefinition def = getDefinition(name);
  -            if (def == null) {
  -                return null;
  -            }
  -            return def.getTypeClass(project);
  +            return (def == null) ? null : def.getTypeClass(project);
           }
   
           public Class getExposedClass(String name) {
               AntTypeDefinition def = getDefinition(name);
  -            if (def == null) {
  -                return null;
  -            }
  -            return def.getExposedClass(project);
  +            return (def == null) ? null : def.getExposedClass(project);
           }
   
           public boolean contains(Object clazz) {
  -            for (Iterator i = values().iterator(); i.hasNext();) {
  -                AntTypeDefinition def = (AntTypeDefinition) i.next();
  -                Class c = def.getExposedClass(project);
  -                if (c == clazz) {
  -                    return true;
  +            boolean found = false;
  +            if (clazz instanceof Class) {
  +                for (Iterator i = values().iterator(); i.hasNext() && !found;)
{
  +                    found |= (((AntTypeDefinition) (i.next())).getExposedClass(
  +                        project) == clazz);
                   }
               }
  -            return false;
  +            return found;
           }
   
           public boolean containsValue(Object value) {
  
  
  

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