001    /**
002     * Copyright 2005-2011 The Kuali Foundation
003     *
004     * Licensed under the Educational Community License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.opensource.org/licenses/ecl2.php
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    package org.kuali.rice.kew.plugin;
017    
018    import org.junit.Test;
019    import org.kuali.rice.core.api.util.ContextClassLoaderBinder;
020    
021    import java.net.URL;
022    import java.net.URLClassLoader;
023    
024    import static org.junit.Assert.assertEquals;
025    import static org.junit.Assert.fail;
026    
027    /**
028     * Tests the ContextClassLoaderBinder
029     * @author Kuali Rice Team (rice.collab@kuali.org)
030     */
031    public class ContextClassLoaderBinderTest {
032    
033        /**
034         * @deprecated {@link ContextClassLoaderBinder#doInContextClassLoader(ClassLoader, java.util.concurrent.Callable)} is the safe way to
035         * run code under a specific Context ClassLoader that ensures the classloader is always set and unset properly.
036         */
037            @Test public void testBinding() {
038            try {
039                ContextClassLoaderBinder.unbind();
040                fail("unbind succeeded without any prior bind");
041            } catch (IllegalStateException ise) {
042                // expect illegal state
043            }
044    
045            ClassLoader cl0 = new URLClassLoader(new URL[] {});
046            ClassLoader cl1 = new URLClassLoader(new URL[] {});
047            ClassLoader cl2 = new URLClassLoader(new URL[] {});
048    
049            ClassLoader original = Thread.currentThread().getContextClassLoader();
050            ContextClassLoaderBinder.bind(cl0);
051            assertEquals(cl0, Thread.currentThread().getContextClassLoader());
052            ContextClassLoaderBinder.unbind();
053            assertEquals(original, Thread.currentThread().getContextClassLoader());
054    
055            ContextClassLoaderBinder.bind(cl0);
056            assertEquals(cl0, Thread.currentThread().getContextClassLoader());
057            ContextClassLoaderBinder.bind(cl1);
058            assertEquals(cl1, Thread.currentThread().getContextClassLoader());
059            ContextClassLoaderBinder.unbind();
060            assertEquals(cl0, Thread.currentThread().getContextClassLoader());
061            ContextClassLoaderBinder.unbind();
062            assertEquals(original, Thread.currentThread().getContextClassLoader());
063    
064            ContextClassLoaderBinder.bind(cl0);
065            assertEquals(cl0, Thread.currentThread().getContextClassLoader());
066            ContextClassLoaderBinder.bind(cl1);
067            assertEquals(cl1, Thread.currentThread().getContextClassLoader());
068            ContextClassLoaderBinder.bind(cl2);
069            assertEquals(cl2, Thread.currentThread().getContextClassLoader());
070            ContextClassLoaderBinder.unbind();
071            assertEquals(cl1, Thread.currentThread().getContextClassLoader());
072            ContextClassLoaderBinder.unbind();
073            assertEquals(cl0, Thread.currentThread().getContextClassLoader());
074            ContextClassLoaderBinder.unbind();
075            assertEquals(original, Thread.currentThread().getContextClassLoader());
076        }
077    }