org.apache.commons.pool2.proxy.CglibProxySource Maven / Gradle / Ivy
/*
* 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.pool2.proxy;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.Factory;
import org.apache.commons.pool2.UsageTracking;
/**
* Provides proxy objects using CGLib.
*
* @param type of the pooled object to be proxied
*
* @since 2.0
*/
public class CglibProxySource implements ProxySource {
private final Class superclass;
/**
* Create a new proxy source for the given class.
*
* @param superclass The class to proxy
*/
public CglibProxySource(final Class superclass) {
this.superclass = superclass;
}
@Override
public T createProxy(final T pooledObject, final UsageTracking usageTracking) {
final Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(superclass);
final CglibProxyHandler proxyInterceptor =
new CglibProxyHandler<>(pooledObject, usageTracking);
enhancer.setCallback(proxyInterceptor);
@SuppressWarnings("unchecked")
final
T proxy = (T) enhancer.create();
return proxy;
}
@Override
public T resolveProxy(final T proxy) {
@SuppressWarnings("unchecked")
final
CglibProxyHandler cglibProxyHandler =
(CglibProxyHandler) ((Factory) proxy).getCallback(0);
final T pooledObject = cglibProxyHandler.disableProxy();
return pooledObject;
}
/**
* @since 2.4.3
*/
@Override
public String toString() {
final StringBuilder builder = new StringBuilder();
builder.append("CglibProxySource [superclass=");
builder.append(superclass);
builder.append("]");
return builder.toString();
}
}