/*
* Copyright 2002-2014 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;
import java.lang.instrument.
ClassFileTransformer;
import org.springframework.core.
OverridingClassLoader;
import org.springframework.lang.
UsesJava7;
/**
* Simplistic implementation of an instrumentable {@code ClassLoader}.
*
* <p>Usable in tests and standalone environments.
*
* @author Rod Johnson
* @author Costin Leau
* @since 2.0
*/
@
UsesJava7
public class
SimpleInstrumentableClassLoader extends
OverridingClassLoader {
static {
if (
parallelCapableClassLoaderAvailable) {
ClassLoader.
registerAsParallelCapable();
}
}
private final
WeavingTransformer weavingTransformer;
/**
* Create a new SimpleInstrumentableClassLoader for the given ClassLoader.
* @param parent the ClassLoader to build an instrumentable ClassLoader for
*/
public
SimpleInstrumentableClassLoader(
ClassLoader parent) {
super(
parent);
this.
weavingTransformer = new
WeavingTransformer(
parent);
}
/**
* Add a {@link ClassFileTransformer} to be applied by this ClassLoader.
* @param transformer the {@link ClassFileTransformer} to register
*/
public void
addTransformer(
ClassFileTransformer transformer) {
this.
weavingTransformer.
addTransformer(
transformer);
}
@
Override
protected byte[]
transformIfNecessary(
String name, byte[]
bytes) {
return this.
weavingTransformer.
transformIfNecessary(
name,
bytes);
}
}