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/* |
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* Copyright 2004 The Apache Software Foundation |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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package org.apache.tools.ant; |
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import java.io.File; |
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import java.io.IOException; |
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import java.net.URL; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.Collections; |
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import java.util.Enumeration; |
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import java.util.List; |
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import junit.framework.TestCase; |
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import org.apache.tools.ant.BuildException; |
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import org.apache.tools.ant.Project; |
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import org.apache.tools.ant.types.Path; |
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import org.apache.tools.ant.util.FileUtils; |
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/** |
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* Test case for ant class loader |
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* |
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*/ |
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public class AntClassLoaderDelegationTest extends TestCase { |
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private Project p; |
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public AntClassLoaderDelegationTest(String name) { |
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super(name); |
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} |
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public void setUp() { |
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p = new Project(); |
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p.init(); |
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} |
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/** Sample resource present in build/testcases/ */ |
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private static final String TEST_RESOURCE = "org/apache/tools/ant/IncludeTest.class"; |
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public void testFindResources() throws Exception { |
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//System.err.println("loading from: " + AntClassLoader.class.getProtectionDomain().getCodeSource().getLocation()); |
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// See bug #30161. |
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// This path should contain the class files for these testcases: |
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String buildTestcases = System.getProperty("build.tests"); |
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assertNotNull("defined ${build.tests}", buildTestcases); |
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assertTrue("have a dir " + buildTestcases, new File(buildTestcases).isDirectory()); |
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Path path = new Path(p, buildTestcases); |
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// A special parent loader which is not the system class loader: |
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ClassLoader parent = new ParentLoader(); |
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// An AntClassLoader which is supposed to delegate to the parent and then to the disk path: |
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ClassLoader acl = new AntClassLoader(parent, p, path, true); |
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// The intended result URLs: |
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URL urlFromPath = new URL(FileUtils.newFileUtils().toURI(buildTestcases) + TEST_RESOURCE); |
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URL urlFromParent = new URL("http://ant.apache.org/" + TEST_RESOURCE); |
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assertEquals("correct resources (regular delegation order)", |
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Arrays.asList(new URL[] {urlFromParent, urlFromPath}), |
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enum2List(acl.getResources(TEST_RESOURCE))); |
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acl = new AntClassLoader(parent, p, path, false); |
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assertEquals("correct resources (reverse delegation order)", |
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Arrays.asList(new URL[] {urlFromPath, urlFromParent}), |
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enum2List(acl.getResources(TEST_RESOURCE))); |
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} |
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private static List enum2List(Enumeration e) { |
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// JDK 1.4: return Collections.list(e); |
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List l = new ArrayList(); |
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while (e.hasMoreElements()) { |
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l.add(e.nextElement()); |
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} |
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return l; |
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} |
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/** Special loader that just knows how to find TEST_RESOURCE. */ |
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private static final class ParentLoader extends ClassLoader { |
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public ParentLoader() {} |
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protected Enumeration findResources(String name) throws IOException { |
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if (name.equals(TEST_RESOURCE)) { |
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return Collections.enumeration(Collections.singleton(new URL("http://ant.apache.org/" + name))); |
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} else { |
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return Collections.enumeration(Collections.EMPTY_SET); |
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} |
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} |
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} |
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} |
Stefan Bodewig