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From ste...@apache.org
Subject cvs commit: ant/src/main/org/apache/tools/ant/types Assertions.java
Date Fri, 13 Jun 2003 05:16:36 GMT
stevel      2003/06/12 22:16:36

  Added:       src/main/org/apache/tools/ant/types Assertions.java
  Log:
  This is not yet linked into <java> but its the intent, or maybe commandLineJava: a
datatype for configuring assertion options. This'll be a fun one to test :)
  
  Revision  Changes    Path
  1.1                  ant/src/main/org/apache/tools/ant/types/Assertions.java
  
  Index: Assertions.java
  ===================================================================
  /*
   *  The Apache Software License, Version 1.1
   *
   *  Copyright (c) 2003 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", "Ant", 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.  For more
   *  information on the Apache Software Foundation, please see
   *  <http://www.apache.org/>.
   */
  
  package org.apache.tools.ant.types;
  
  import org.apache.tools.ant.BuildException;
  
  import java.util.List;
  import java.util.ArrayList;
  import java.util.Iterator;
  
  /**
   * implement the assertion datatype. This type describes
   * assertion settings for the &lt;java&gt; task and derivatives.
   * One can set the system assertions, and enable/disable those in
   * packages & classes.
   * Assertions can only be enabled or disabled when forking Java.
   *
   * Example: set system assertions and all org.apache packages except
   * for ant, and the class org.apache.tools.ant.Main.
   * <pre>
   * &lt;assertions enableSystemAssertions="true" &gt;
   *   &lt;enable package="org.apache" /&gt;
   *   &lt;disable package="org.apache.ant" /&gt;
   *   &lt;enable class="org.apache.tools.ant.Main"/&gt;
   * &lt;/assertions&gt;
   *</pre>
   * Disable system assertions; enable those in the anonymous package
   * <pre>
   * &lt;assertions enableSystemAssertions="false" &gt;
   *   &lt;enable package="..." /&gt;
   * &lt;/assertions&gt;
   * </pre>
   * enable assertions in a class called Test 
   * <pre>
   * &lt;assertions &gt;
   *   &lt;enable class="Test" /&gt;
   * &lt;/assertions&gt;
   * </pre>
   * This type is a datatype, so you can declare assertions and use them later
   *
   * <pre>
   * &lt;assertions id="project.assertions" &gt;
   *   &lt;enable project="org.apache.test" /&gt;
   * &lt;/assertions&gt;
   *
   * &lt;assertions refid="project.assertions" /&gt;
   *
   * </pre>
   * @since Ant 1.6
   * @author steve loughran
   */
  public class Assertions extends DataType {
  
      /**
       * enable/disable sys assertions; null means undefined
       */
      private Boolean enableSystemAssertions;
  
      /**
       * list of type BaseAssertion
       */
      private List assertionList=new ArrayList();
  
  
      /**
       * enable assertions
       * @param assertion
       */
      public void addEnable(EnabledAssertion assertion) {
          checkChildrenAllowed();
          assertionList.add(assertion);
      }
  
      /**
       * disable assertions
       * @param assertion
       */
      public void addDisable(EnabledAssertion assertion) {
          checkChildrenAllowed();
          assertionList.add(assertion);
      }
  
      /**
       * enable or disable system assertions
       * @param enableSystemAssertions
       */
      public void setEnableSystemAssertions(Boolean enableSystemAssertions) {
          checkAttributesAllowed();
          this.enableSystemAssertions = enableSystemAssertions;
      }
  
      /**
       * Set the value of the refid attribute.
       *
       * <p>Subclasses may need to check whether any other attributes
       * have been set as well or child elements have been created and
       * thus override this method. if they do the must call
       * <code>super.setRefid</code>.</p>
       */
      public void setRefid(Reference ref) {
          if(assertionList.size()>0 || enableSystemAssertions!=null) {
              throw tooManyAttributes();
          }
          super.setRefid(ref);
      }
  
      /**
       * get whatever we are referencing to. This could be ourself.
       * @return the object that contains the assertion info
       */
      private Assertions getFinalReference() {
          if(getRefid()==null) {
              return this;
          } else {
              Object o = getRefid().getReferencedObject(getProject());
              if(!(o instanceof Assertions)) {
                  throw new BuildException("reference is of wrong type");
              }
              return (Assertions)o;
          }
      }
  
      /**
       * apply all the assertions to the command.
       * @param command
       */
      public void applyAssertions(CommandlineJava command) {
          Assertions clause=getFinalReference();
          //do the system assertions
          if(Boolean.TRUE.equals(clause.enableSystemAssertions)) {
              addVmArgument(command,"-enablesystemassertions");
          } else if (Boolean.FALSE.equals(clause.enableSystemAssertions)) {
              addVmArgument(command, "-disablesystemassertions");
          }
  
          //now any inner assertions
          Iterator it= clause.assertionList.iterator();
          while (it.hasNext()) {
              BaseAssertion assertion = (BaseAssertion) it.next();
              String arg=assertion.toCommand();
              addVmArgument(command, arg);
          }
      }
  
      /**
       * helper method to add a string JVM argument to a command
       * @param command
       * @param arg
       */
      private static void addVmArgument(CommandlineJava command, String arg) {
          Commandline.Argument argument;
          argument = command.createVmArgument();
          argument.setValue(arg);
      }
  
      /**
       * base class for our assertion elements.
       */
  
      public static abstract class BaseAssertion {
          private String packageName;
          private String className;
  
          /**
           * name a class
           * @param className
           */
          public void setClass(String className) {
              this.className = className;
          }
  
          /**
           * name a package
           * @param packageName
           */
          public void setPackage(String packageName) {
              this.packageName = packageName;
          }
  
          /**
           * what is the class name?
           * @return classname or null
           * @see #setClass
           */
          protected String getClassName() {
              return className;
          }
  
          /**
           * what is the package name?
           * @return package name or null
           * @see #setPackage
           */
          protected String getPackageName() {
              return packageName;
          }
  
          /**
           * get the prefix used to begin the command; -ea or -da.
           * @return prefix
           */
          public abstract String getCommandPrefix();
  
          /**
           * create a full command string from this class
           * @throws BuildException in case of trouble
           * @return
           */
          public String toCommand() {
              //catch invalidness
              if(getPackageName()!=null && getClassName()!=null) {
                  throw new BuildException("Both package and class have been set");
              }
              StringBuffer command=new StringBuffer(getCommandPrefix());
              //see if it is a package or a class
              if(getPackageName() != null) {
                  //packages get a ... prefix
                  command.append(':');
                  command.append(getPackageName());
                  if(!command.toString().endsWith("...")) {
                      //append the ... suffix if not there already
                      command.append("...");
                  }
              } else if(getClassName()!=null) {
                  //classes just get the classname
                  command.append(':');
                  command.append(getClassName());
              }
              return command.toString();
          }
      }
  
  
      /**
       * an enabled assertion enables things
       */
      public static class EnabledAssertion extends BaseAssertion {
          /**
           * get the prefix used to begin the command; -ea or -da.
           * @return prefix
           */
          public String getCommandPrefix() {
              return "-ea";
          }
  
      }
  
      /**
       * A disabled assertion disables things
       */
      public static class DisabledAssertion extends BaseAssertion {
          /**
           * get the prefix used to begin the command; -ea or -da.
           * @return prefix
           */
          public String getCommandPrefix() {
              return "-da";
          }
  
      }
  }
  
  
  

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