/*
* 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:
* <ul>
* <li>ref</li>
* <li>classpath</li>
* </ul>
*
* 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<list.length; i++) {
if (list[i].matches(".*ant-[^/]*jar$")) {
continue;
}
if (list[i].matches(".*commons-logging-[^/]*jar$")) {
continue;
}
if (list[i].matches(".*xerces-[^/]*jar$")) {
continue;
}
lc.addFile(list[i]);
}
return new RootLoader(lc);
}
/**
* Set the classpath to be used for this compilation.
*
* @param classpath an Ant Path object containing the compilation classpath.
*/
public void setClasspath(Path classpath) {
if (taskClasspath == null) {
taskClasspath = classpath;
}
else {
taskClasspath.append(classpath);
}
}
/**
* Adds a reference to a classpath defined elsewhere.
* @param r a reference to a classpath
*/
public void setClasspathRef(Reference r) {
createClasspath().setRefid(r);
}
/**
* Adds a path to the classpath.
* @return a class path to be configured
*/
public Path createClasspath() {
if (taskClasspath == null) {
taskClasspath = new Path(getProject());
}
return taskClasspath.createPath();
}
}