org.springframework.aop.framework.DefaultAopProxyFactory Maven / Gradle / Ivy
/*
* Copyright 2002-2015 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.aop.framework;
import java.io.Serializable;
import java.lang.reflect.Proxy;
import org.springframework.aop.SpringProxy;
/**
* Default {@link AopProxyFactory} implementation, creating either a CGLIB proxy
* or a JDK dynamic proxy.
*
* Creates a CGLIB proxy if one the following is true for a given
* {@link AdvisedSupport} instance:
*
* - the {@code optimize} flag is set
*
- the {@code proxyTargetClass} flag is set
*
- no proxy interfaces have been specified
*
*
* In general, specify {@code proxyTargetClass} to enforce a CGLIB proxy,
* or specify one or more interfaces to use a JDK dynamic proxy.
*
* @author Rod Johnson
* @author Juergen Hoeller
* @since 12.03.2004
* @see AdvisedSupport#setOptimize
* @see AdvisedSupport#setProxyTargetClass
* @see AdvisedSupport#setInterfaces
*/
@SuppressWarnings("serial")
public class DefaultAopProxyFactory implements AopProxyFactory, Serializable {
@Override
public AopProxy createAopProxy(AdvisedSupport config) throws AopConfigException {
if (config.isOptimize() || config.isProxyTargetClass() || hasNoUserSuppliedProxyInterfaces(config)) {
Class targetClass = config.getTargetClass();
if (targetClass == null) {
throw new AopConfigException("TargetSource cannot determine target class: " +
"Either an interface or a target is required for proxy creation.");
}
if (targetClass.isInterface() || Proxy.isProxyClass(targetClass)) {
return new JdkDynamicAopProxy(config);
}
return new ObjenesisCglibAopProxy(config);
}
else {
return new JdkDynamicAopProxy(config);
}
}
/**
* Determine whether the supplied {@link AdvisedSupport} has only the
* {@link org.springframework.aop.SpringProxy} interface specified
* (or no proxy interfaces specified at all).
*/
private boolean hasNoUserSuppliedProxyInterfaces(AdvisedSupport config) {
Class[] ifcs = config.getProxiedInterfaces();
return (ifcs.length == 0 || (ifcs.length == 1 && SpringProxy.class.isAssignableFrom(ifcs[0])));
}
}