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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.tools.ant;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.Arrays;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import org.apache.tools.ant.types.Path;
import org.apache.tools.ant.util.FileUtils;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
/**
* Test case for ant class loader
*
*/
public class AntClassLoaderDelegationTest {
/** Instance of a utility class to use for file operations. */
private static final FileUtils FILE_UTILS = FileUtils.getFileUtils();
private Project p;
@Before
public void setUp() {
p = new Project();
p.init();
}
/** Sample resource present in build/testcases/ */
private static final String TEST_RESOURCE
= "apache/tools/ant/IncludeTest.class";
@Test
public void testFindResources() throws Exception {
// This path should contain the class files for these testcases:
String buildTestcases = System.getProperty("build.tests");
assertNotNull("defined ${build.tests}", buildTestcases);
assertTrue("have a dir " + buildTestcases,
new File(buildTestcases).isDirectory());
Path path = new Path(p, buildTestcases + "/org");
// A special parent loader which is not the system class loader:
ClassLoader parent = new ParentLoader();
// An AntClassLoader which is supposed to delegate to
// the parent and then to the disk path:
ClassLoader acl = new AntClassLoader(parent, p, path, true);
// The intended result URLs:
URL urlFromPath = new URL(
FILE_UTILS.toURI(buildTestcases) + "org/" + TEST_RESOURCE);
URL urlFromParent = new URL("http://ant.apache.org/" + TEST_RESOURCE);
assertEquals("correct resources (regular delegation order)",
Arrays.asList(new URL[] {urlFromParent, urlFromPath}),
enum2List(acl.getResources(TEST_RESOURCE)));
acl = new AntClassLoader(parent, p, path, false);
assertEquals("correct resources (reverse delegation order)",
Arrays.asList(new URL[] {urlFromPath, urlFromParent}),
enum2List(acl.getResources(TEST_RESOURCE)));
}
@Test
public void testFindIsolateResources() throws Exception {
String buildTestcases = System.getProperty("build.tests");
assertNotNull("defined ${build.tests}", buildTestcases);
assertTrue("have a dir " + buildTestcases,
new File(buildTestcases).isDirectory());
Path path = new Path(p, buildTestcases + "/org");
// A special parent loader which is not the system class loader:
ClassLoader parent = new ParentLoader();
URL urlFromPath = new URL(
FILE_UTILS.toURI(buildTestcases) + "org/" + TEST_RESOURCE);
AntClassLoader acl = new AntClassLoader(parent, p, path, false);
acl.setIsolated(true);
assertEquals("correct resources (reverse delegation order)",
Arrays.asList(new URL[] {urlFromPath}),
enum2List(acl.getResources(TEST_RESOURCE)));
}
private static List enum2List(Enumeration e) {
return Collections.list(e);
}
/** Special loader that just knows how to find TEST_RESOURCE. */
private static final class ParentLoader extends ClassLoader {
public ParentLoader() {}
protected Enumeration findResources(String name) throws IOException {
if (name.equals(TEST_RESOURCE)) {
return Collections.enumeration(
Collections.singleton(
new URL("http://ant.apache.org/" + name)));
} else {
return Collections.enumeration(Collections.EMPTY_SET);
}
}
}
}
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