org.springframework.aop.framework.ProxyFactory Maven / Gradle / Ivy
/*
* Copyright 2002-2005 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 org.aopalliance.intercept.Interceptor;
import org.springframework.util.ClassUtils;
import org.springframework.aop.TargetSource;
/**
* Factory for AOP proxies for programmatic use, rather than via a bean
* factory. This class provides a simple way of obtaining and configuring
* AOP proxies in code.
*
* @author Rod Johnson
* @author Rob Harrop
* @since 14.03.2003
*/
public class ProxyFactory extends AdvisedSupport {
/**
* Create a new ProxyFactory.
*/
public ProxyFactory() {
}
/**
* Create a new ProxyFactory.
* Proxy all interfaces of the given target.
*/
public ProxyFactory(Object target) throws AopConfigException {
if (target == null) {
throw new AopConfigException("Can't proxy null object");
}
setInterfaces(ClassUtils.getAllInterfaces(target));
setTarget(target);
}
/**
* Create a new ProxyFactory.
* No target, only interfaces. Must add interceptors.
*/
public ProxyFactory(Class[] interfaces) {
setInterfaces(interfaces);
}
/**
* Create a new proxy according to the settings in this factory.
* Can be called repeatedly. Effect will vary if we've added
* or removed interfaces. Can add and remove interceptors.
* @return the new proxy
*/
public Object getProxy() {
AopProxy proxy = createAopProxy();
return proxy.getProxy();
}
/**
* Create a new proxy for the given interface and interceptor.
* Convenience method for creating a proxy for a single interceptor,
* assuming that the interceptor handles all calls itself rather than
* delegating to a target, like in the case of remoting proxies.
* @param proxyInterface the interface that the proxy should implement
* @param interceptor the interceptor that the proxy should invoke
* @return the new proxy
*/
public static Object getProxy(Class proxyInterface, Interceptor interceptor) {
ProxyFactory proxyFactory = new ProxyFactory();
proxyFactory.addInterface(proxyInterface);
proxyFactory.addAdvice(interceptor);
return proxyFactory.getProxy();
}
/**
* Creates a proxy for the specified TargetSource that implements the
* specified interface.
*/
public static Object getProxy(Class proxyInterface, TargetSource targetSource) {
ProxyFactory proxyFactory = new ProxyFactory();
proxyFactory.addInterface(proxyInterface);
proxyFactory.setTargetSource(targetSource);
return proxyFactory.getProxy();
}
/**
* Create a proxy for the specified TargetSource that extends the
* target class of the TargetSource.
*/
public static Object getProxy(TargetSource targetSource) {
if(targetSource.getTargetClass() == null) {
throw new IllegalArgumentException("Cannot create class proxy for TargetSource with null target class");
}
ProxyFactory proxyFactory = new ProxyFactory();
proxyFactory.setTargetSource(targetSource);
proxyFactory.setProxyTargetClass(true);
return proxyFactory.getProxy();
}
}