/*
* Copyright 2002-2007 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.springframework.instrument.classloading.oc4j;
import java.lang.instrument.ClassFileTransformer;
import org.springframework.instrument.classloading.LoadTimeWeaver;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
/**
* {@link LoadTimeWeaver} implementation for OC4J's instrumentable ClassLoader.
*
* <p><b>NOTE:</b> Requires Oracle OC4J version 10.1.3.1 or higher.
*
* <p>Many thanks to <a href="mailto:[email protected]">Mike Keith</a>
* for his assistance.
*
* @author Costin Leau
* @author Juergen Hoeller
* @since 2.0
*/
public class OC4JLoadTimeWeaver implements LoadTimeWeaver {
private final OC4JClassLoaderAdapter classLoader;
/**
* Creates a new instance of thie {@link OC4JLoadTimeWeaver} class
* using the default {@link ClassLoader class loader}.
* @see org.springframework.util.ClassUtils#getDefaultClassLoader()
*/
public OC4JLoadTimeWeaver() {
this(ClassUtils.getDefaultClassLoader());
}
/**
* Creates a new instance of the {@link OC4JLoadTimeWeaver} class
* using the supplied {@link ClassLoader}.
* @param classLoader the <code>ClassLoader</code> to delegate to for weaving
*/
public OC4JLoadTimeWeaver(ClassLoader classLoader) {
Assert.notNull(classLoader, "ClassLoader must not be null");
this.classLoader = new OC4JClassLoaderAdapter(classLoader);
}
public void addTransformer(ClassFileTransformer transformer) {
Assert.notNull(transformer, "Transformer must not be null");
// Since OC4J 10.1.3's PolicyClassLoader is going to be removed,
// we rely on the ClassLoaderUtilities API instead.
classLoader.addTransformer(transformer);
}
public ClassLoader getInstrumentableClassLoader() {
return classLoader.getClassLoader();
}
public ClassLoader getThrowawayClassLoader() {
return classLoader.getThrowawayClassLoader();
}
}
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