| /* |
| * 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.myfaces.cdi; |
| |
| import java.lang.annotation.Annotation; |
| import java.util.Map; |
| import javax.enterprise.context.ContextNotActiveException; |
| import javax.enterprise.context.spi.Context; |
| import javax.enterprise.context.spi.Contextual; |
| import javax.enterprise.context.spi.CreationalContext; |
| import javax.enterprise.inject.Typed; |
| import javax.enterprise.inject.spi.BeanManager; |
| import javax.faces.context.FacesContext; |
| import org.apache.myfaces.cdi.util.ContextualInstanceInfo; |
| import org.apache.myfaces.cdi.util.ContextualStorage; |
| |
| /** |
| * Minimal implementation of FacesScope. |
| */ |
| @Typed() |
| public class FacesScopeContextImpl implements Context |
| { |
| private BeanManager beanManager; |
| |
| public FacesScopeContextImpl(BeanManager beanManager) |
| { |
| this.beanManager = beanManager; |
| } |
| |
| protected FacesScopeBeanHolder getFacesScopeBeanHolder() |
| { |
| return getFacesScopeBeanHolder(FacesContext.getCurrentInstance()); |
| } |
| |
| protected FacesScopeBeanHolder getFacesScopeBeanHolder(FacesContext facesContext) |
| { |
| return new FacesScopeBeanHolder(); |
| } |
| |
| /** |
| * An implementation has to return the underlying storage which |
| * contains the items held in the Context. |
| * @param createIfNotExist whether a ContextualStorage shall get created if it doesn't yet exist. |
| * @return the underlying storage |
| */ |
| protected ContextualStorage getContextualStorage(boolean createIfNotExist, FacesContext facesContext) |
| { |
| if (facesContext == null) |
| { |
| throw new ContextNotActiveException(this.getClass().getName() + ": no current active facesContext"); |
| } |
| |
| if (createIfNotExist) |
| { |
| return getFacesScopeBeanHolder(facesContext).getContextualStorage(beanManager, facesContext); |
| } |
| else |
| { |
| return getFacesScopeBeanHolder(facesContext).getContextualStorageNoCreate(beanManager, facesContext); |
| } |
| } |
| |
| @Override |
| public Class<? extends Annotation> getScope() |
| { |
| return FacesScoped.class; |
| } |
| |
| @Override |
| public boolean isActive() |
| { |
| return FacesContext.getCurrentInstance() != null; |
| } |
| |
| @Override |
| public <T> T get(Contextual<T> bean) |
| { |
| FacesContext facesContext = FacesContext.getCurrentInstance(); |
| |
| checkActive(facesContext); |
| |
| if (facesContext != null) |
| { |
| ContextualStorage storage = getContextualStorage(false, facesContext); |
| if (storage != null) |
| { |
| Map<Object, ContextualInstanceInfo<?>> contextMap = storage.getStorage(); |
| ContextualInstanceInfo<?> contextualInstanceInfo = contextMap.get(storage.getBeanKey(bean)); |
| |
| if (contextualInstanceInfo != null) |
| { |
| return (T) contextualInstanceInfo.getContextualInstance(); |
| } |
| } |
| } |
| else |
| { |
| throw new IllegalStateException("FacesContext cannot be found when resolving bean " +bean.toString()); |
| } |
| return null; |
| } |
| |
| @Override |
| public <T> T get(Contextual<T> bean, CreationalContext<T> creationalContext) |
| { |
| FacesContext facesContext = FacesContext.getCurrentInstance(); |
| |
| checkActive(facesContext); |
| |
| ContextualStorage storage = getContextualStorage(true, facesContext); |
| |
| Map<Object, ContextualInstanceInfo<?>> contextMap = storage.getStorage(); |
| ContextualInstanceInfo<?> contextualInstanceInfo = contextMap.get(storage.getBeanKey(bean)); |
| |
| if (contextualInstanceInfo != null) |
| { |
| @SuppressWarnings("unchecked") |
| final T instance = (T) contextualInstanceInfo.getContextualInstance(); |
| |
| if (instance != null) |
| { |
| return instance; |
| } |
| } |
| |
| return storage.createContextualInstance(bean, creationalContext); |
| } |
| |
| /** |
| * Destroy the Contextual Instance of the given Bean. |
| * @param bean dictates which bean shall get cleaned up |
| * @return <code>true</code> if the bean was destroyed, <code>false</code> if there was no such bean. |
| */ |
| public boolean destroy(Contextual bean) |
| { |
| FacesContext facesContext = FacesContext.getCurrentInstance(); |
| ContextualStorage storage = getContextualStorage(false, facesContext); |
| if (storage == null) |
| { |
| return false; |
| } |
| ContextualInstanceInfo<?> contextualInstanceInfo = storage.getStorage().get(storage.getBeanKey(bean)); |
| |
| if (contextualInstanceInfo == null) |
| { |
| return false; |
| } |
| |
| bean.destroy(contextualInstanceInfo.getContextualInstance(), contextualInstanceInfo.getCreationalContext()); |
| return true; |
| } |
| |
| /** |
| * Destroys all the Contextual Instances in the specified ContextualStorage. |
| * This is a static method to allow various holder objects to cleanup |
| * properly in @PreDestroy. |
| */ |
| public static void destroyAllActive(ContextualStorage storage) |
| { |
| Map<Object, ContextualInstanceInfo<?>> contextMap = storage.getStorage(); |
| for (Map.Entry<Object, ContextualInstanceInfo<?>> entry : contextMap.entrySet()) |
| { |
| if (!FacesScopeBeanHolder.FACES_SCOPE_MAP_INFO.equals(entry.getKey())) |
| { |
| Contextual bean = storage.getBean(entry.getKey()); |
| |
| ContextualInstanceInfo<?> contextualInstanceInfo = entry.getValue(); |
| bean.destroy(contextualInstanceInfo.getContextualInstance(), |
| contextualInstanceInfo.getCreationalContext()); |
| } |
| } |
| } |
| |
| /** |
| * Make sure that the Context is really active. |
| * @throws ContextNotActiveException if there is no active |
| * Context for the current Thread. |
| */ |
| protected void checkActive(FacesContext facesContext) |
| { |
| if (facesContext == null) |
| { |
| throw new ContextNotActiveException("CDI context with scope annotation @" |
| + getScope().getName() + " is not active with respect to the current thread"); |
| } |
| } |
| |
| } |