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Commons Beanutils example source code file (ClassReloaderTestCase.java)

This example Commons Beanutils source code file (ClassReloaderTestCase.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Beanutils tags/keywords

class, classloader, classreloader, classreloader, classreloadertestcase, classreloadertestcase, dummyclass, obj1, obj2, obj2, object, object, testcase, testsuite

The Commons Beanutils ClassReloaderTestCase.java source code

/*
 * 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.commons.beanutils.converters;

import junit.framework.TestCase;
import junit.framework.TestSuite;

/**
 * Tests for the ClassReloader utility class.
 */

public class ClassReloaderTestCase extends TestCase {

    // ------------------------------------------------------------------------

    public ClassReloaderTestCase(String name) {
        super(name);
    }


    public static TestSuite suite() {
        return new TestSuite(ClassReloaderTestCase.class);
    }

    // ------------------------------------------------------------------------

    public static class DummyClass {
    }
        
    /**
     * Test basic operation of the ClassReloader.
     */
    public void testBasicOperation() throws Exception {
        ClassLoader sharedLoader = this.getClass().getClassLoader();
        ClassReloader componentLoader = new ClassReloader(sharedLoader);

        Class sharedClass = DummyClass.class;
        Class componentClass = componentLoader.reload(sharedClass);

        // the two Class objects contain the same bytecode, but are not equal
        assertTrue(sharedClass != componentClass);
        
        // the two class objects have different classloaders
        assertSame(sharedLoader, sharedClass.getClassLoader());
        assertSame(componentLoader, componentClass.getClassLoader());
        assertTrue(sharedLoader != componentLoader);

        // verify that objects of these two types are not assignment-compatible
        Object obj1 = sharedClass.newInstance();
        Object obj2 = componentClass.newInstance();

        assertTrue("Obj1 class incorrect", sharedClass.isInstance(obj1));
        assertFalse("Obj1 class incorrect", componentClass.isInstance(obj1));
        assertFalse("Obj2 class incorrect", sharedClass.isInstance(obj2));
        assertTrue("Obj2 class incorrect", componentClass.isInstance(obj2));
    }

}

Other Commons Beanutils examples (source code examples)

Here is a short list of links related to this Commons Beanutils ClassReloaderTestCase.java source code file:

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