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rework decoration process, elliminate recursivity, separate handling …
…of delegate and non-delegate references inside getInjectableReference
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impl/src/main/java/org/jboss/weld/bean/proxy/DecorationHelper.java
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| /* | ||
| * JBoss, Home of Professional Open Source | ||
| * Copyright 2010, Red Hat, Inc. and/or its affiliates, and individual | ||
| * contributors by the @authors tag. See the copyright.txt in the | ||
| * distribution for a full listing of individual contributors. | ||
| * | ||
| * 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. | ||
| */ | ||
|
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| package org.jboss.weld.bean.proxy; | ||
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| import static org.jboss.weld.logging.messages.BeanMessage.PROXY_INSTANTIATION_BEAN_ACCESS_FAILED; | ||
| import static org.jboss.weld.logging.messages.BeanMessage.PROXY_INSTANTIATION_FAILED; | ||
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| import javax.enterprise.context.spi.CreationalContext; | ||
| import javax.enterprise.inject.spi.Decorator; | ||
| import javax.enterprise.inject.spi.InjectionPoint; | ||
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| import java.util.LinkedList; | ||
| import java.util.List; | ||
| import java.util.Stack; | ||
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| import org.jboss.weld.context.SerializableContextualInstanceImpl; | ||
| import org.jboss.weld.exceptions.WeldException; | ||
| import org.jboss.weld.manager.BeanManagerImpl; | ||
| import org.jboss.weld.util.Proxies; | ||
| import org.jboss.weld.util.reflection.SecureReflections; | ||
|
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| /** | ||
| * @author Marius Bogoevici | ||
| */ | ||
| public class DecorationHelper<T> | ||
| { | ||
| private static ThreadLocal<Stack<DecorationHelper<?>>> helperStackHolder = new ThreadLocal<Stack<DecorationHelper<?>>>() | ||
| { | ||
| @Override protected Stack<DecorationHelper<?>> initialValue() | ||
| { | ||
| return new Stack<DecorationHelper<?>>(); | ||
| } | ||
| }; | ||
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| private Class<T> proxyClassForDecorator; | ||
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| private T originalInstance; | ||
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| private T previousDelegate; | ||
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| private int counter; | ||
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| private BeanManagerImpl beanManager; | ||
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| List<Decorator<?>> decorators; | ||
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| public DecorationHelper(T originalInstance, Class<T> proxyClassForDecorator, BeanManagerImpl beanManager, List<Decorator<?>> decorators) | ||
| { | ||
| this.originalInstance = originalInstance; | ||
| this.beanManager = beanManager; | ||
| this.decorators = new LinkedList<Decorator<?>>(decorators); | ||
| this.proxyClassForDecorator = proxyClassForDecorator; | ||
| counter = 0; | ||
| } | ||
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| public static Stack<DecorationHelper<?>> getHelperStack() | ||
| { | ||
| return helperStackHolder.get(); | ||
| } | ||
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| public DecoratorProxyMethodHandler createMethodHandler(InjectionPoint injectionPoint, CreationalContext<?> creationalContext, Decorator<Object> decorator) | ||
| { | ||
| Object decoratorInstance = beanManager.getReference(injectionPoint, decorator, creationalContext); | ||
| SerializableContextualInstanceImpl<Decorator<Object>, Object> serializableContextualInstance = new SerializableContextualInstanceImpl<Decorator<Object>, Object>(decorator, decoratorInstance, null); | ||
| return new DecoratorProxyMethodHandler(serializableContextualInstance, previousDelegate); | ||
| } | ||
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| public T getNextDelegate(InjectionPoint injectionPoint, CreationalContext<?> creationalContext) | ||
| { | ||
| if (counter == decorators.size()) | ||
| { | ||
| previousDelegate = originalInstance; | ||
| return originalInstance; | ||
| } | ||
| else | ||
| { | ||
| try | ||
| { | ||
| T proxy = SecureReflections.newInstance(proxyClassForDecorator); | ||
| Proxies.attachMethodHandler(proxy, createMethodHandler(injectionPoint, creationalContext, (Decorator<Object>) decorators.get(counter++))); | ||
| previousDelegate = proxy; | ||
| return proxy; | ||
| } | ||
| catch (InstantiationException e) | ||
| { | ||
| throw new WeldException(PROXY_INSTANTIATION_FAILED, e, this); | ||
| } | ||
| catch (IllegalAccessException e) | ||
| { | ||
| throw new WeldException(PROXY_INSTANTIATION_BEAN_ACCESS_FAILED, e, this); | ||
| } | ||
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| } | ||
| } | ||
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| } |
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