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/*
 * Copyright 2003-2007 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.codehaus.groovy.ant;

import org.apache.tools.ant.AntClassLoader;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.MatchingTask;
import org.apache.tools.ant.types.Path;
import org.apache.tools.ant.types.Reference;
import org.codehaus.groovy.tools.LoaderConfiguration;
import org.codehaus.groovy.tools.RootLoader;

 
/**
 * Sets the RootLoader as reference.
 * Reexecution of this task will set a new instance of RootLoader for
 * the reference. 
 *
 * arguments:
 * 
    *
  • ref
  • *
  • classpath
  • *
* * all arguments are required. * * As ant requires an AntClassLoader as reference, this will create a RootLoader * and set an AntClassLoader as child and stored in the reference. The AntClassLoader * instance will not have a classpath nor will it have access to the classpath somehow, * all loading is done by the RootLoader parent. To avoid problems with loading classes * multiple times and using them at the same time, this task will filter out the ant jars * and the commons-logging jars. This only works if the ant jars are starting with "ant-" and * the logging jar starts with "commons-logging-". * * This was needed because if ant wants to access a task argument that uses for example a Path * it look for a matching method which includes a matching class. But two classes of the same name * with different classloaders are different, so ant would not be able to find the method. * * @see org.codehaus.groovy.tools.RootLoader * @author Jochen Theodorou * @version $Revision$ */ public class RootLoaderRef extends MatchingTask { private String name; private Path taskClasspath; /** * sets the name of the reference which should store the Loader */ public void setRef(String n){ name = n; } public void execute() throws BuildException { if (taskClasspath==null || taskClasspath.size()==0) { throw new BuildException("no classpath given"); } Project project = getProject(); AntClassLoader loader = new AntClassLoader(makeRoot(),true); project.addReference(name,loader); } private RootLoader makeRoot() { String[] list = taskClasspath.list(); LoaderConfiguration lc = new LoaderConfiguration(); for (int i=0; i




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