/* * JBoss, Home of Professional Open Source * Copyright 2011, Red Hat, Inc., 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. */ package org.jboss.seam.faces.environment; import javax.enterprise.context.ContextNotActiveException; import javax.enterprise.context.RequestScoped; import javax.enterprise.inject.Produces; import javax.faces.context.FacesContext; import javax.faces.context.Flash; /** * <p> * A producer which retrieves the {@link Flash} for the current request of the JavaServer Faces application by calling * {@link FacesContext#getCurrentInstance()} and stores the result as a request-scoped bean instance. * </p> * <p/> * <p> * This producer allows the {@link Flash} to be injected: * </p> * <p/> * <pre> * @Inject * Flash flash; * </pre> * * @author Lincoln Baxter */ public class FacesFlashProducer { @Produces @RequestScoped public Flash getFlash() { FacesContext facesContext = FacesContext.getCurrentInstance(); if (facesContext == null) { throw new ContextNotActiveException("FacesContext is not active"); } Flash ctx = facesContext.getExternalContext().getFlash(); if (ctx == null) { throw new ContextNotActiveException("Flash is not active"); } return ctx; } }