001// Copyright 2006, 2007, 2008, 2009 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry5.internal.services; 016 017import org.apache.tapestry5.ComponentResources; 018import org.apache.tapestry5.internal.structure.Page; 019import org.apache.tapestry5.ioc.annotations.Marker; 020import org.apache.tapestry5.runtime.Component; 021import org.apache.tapestry5.services.ComponentEventResultProcessor; 022import org.apache.tapestry5.services.Traditional; 023import org.slf4j.Logger; 024 025import java.io.IOException; 026 027@Marker({Traditional.class, ComponentInstanceProcessor.class}) 028public class ComponentInstanceResultProcessor implements ComponentEventResultProcessor<Component> 029{ 030 private final RequestPageCache requestPageCache; 031 032 private final Logger logger; 033 034 private final ActionRenderResponseGenerator generator; 035 036 public ComponentInstanceResultProcessor(Logger logger, RequestPageCache requestPageCache, 037 ActionRenderResponseGenerator generator) 038 { 039 this.requestPageCache = requestPageCache; 040 this.logger = logger; 041 this.generator = generator; 042 } 043 044 public void processResultValue(Component value) throws IOException 045 { 046 ComponentResources resources = value.getComponentResources(); 047 048 if (resources.getContainer() != null) 049 logger.warn(ServicesMessages.componentInstanceIsNotAPage(value)); 050 051 // We have all these layers and layers between us and the page instance, but its easy to 052 // extract the page class name and quickly re-resolve that to the page instance. 053 054 Page page = requestPageCache.get(resources.getPageName()); 055 056 generator.generateResponse(page); 057 } 058}