/*
* Copyright 2006 - 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.springmodules.xt.model.introductor.bean;
import org.springmodules.xt.model.introductor.AbstractDynamicIntroductor;
import org.springframework.aop.framework.ProxyFactory;
/**
* <p>
* Introductor implementation for introducing JavaBeans style interfaces via {@link BeanIntroductorAdvisor}
* and {@link BeanIntroductorInterceptor}.<br>
* This introductor introduces additional interfaces into a target object, and creates a proxy object that behaves
* like the following:
* <ul>
* <li>Every call to a getter/setter method declared into the introduced interface is delegated to the target object
* if this declares and implements a public method with equal signature, otherwise it is automatically implemented
* by the proxy.</li>
* <li>Every call to a non getter/setter method declared into the introduced interface throws an exception.</li>
* <li>Every call to a method not declared into the introduced interface is directly delegated
* to the target object </li>
* </ul>
* Moreover, it is possible to change the introductor behaviour by annotating the introduced interfaces with
* annotations contained in the <i>org.springmodules.xt.model.introductor.annotation</i> package; it is possible to
* use the following annotations:
* <ul>
* <li>{@link org.springmodules.xt.model.introductor.annotation.MapToTargetField}</li>
* <li>{@link org.springmodules.xt.model.introductor.annotation.OverrideTarget}</li>
* </ul>
* </p>
* <p>
* <b>Restrictions</b>: The only restriction is that introduced methods cannot return primitive values; so, you
* have to use wrapper objects instead when you need to return a primitive type.
* </p>
* <p>This class is <b>thread-safe</b>.</p>
*
* @author Sergio Bossa
*/
public class DynamicBeanIntroductor extends AbstractDynamicIntroductor {
/**
* @see AbstractDynamicIntroductor#introduceInterfaces(Object , Class[] )
*/
public Object introduceInterfaces(Object target, Class[] introducedInterfaces) {
ProxyFactory proxyFactory = new ProxyFactory();
proxyFactory.setProxyTargetClass(true);
proxyFactory.addAdvisor(new BeanIntroductorAdvisor(introducedInterfaces));
proxyFactory.setTarget(target);
return proxyFactory.getProxy();
}
/**
* @see AbstractDynamicIntroductor#introduceInterfaces(Object , Class[] , Class[] )
*/
public Object introduceInterfaces(Object target, Class[] introducedInterfaces, Class[] targetInterfaces) {
ProxyFactory proxyFactory = new ProxyFactory();
proxyFactory.addAdvisor(new BeanIntroductorAdvisor(introducedInterfaces));
proxyFactory.setTarget(target);
proxyFactory.setInterfaces(this.merge(introducedInterfaces, targetInterfaces));
return proxyFactory.getProxy();
}
}