001 // Copyright 2004, 2005 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. 014 015 package org.apache.tapestry.engine; 016 017 import java.io.IOException; 018 import java.util.HashMap; 019 import java.util.Map; 020 021 import org.apache.tapestry.IRequestCycle; 022 import org.apache.tapestry.Tapestry; 023 import org.apache.tapestry.services.LinkFactory; 024 import org.apache.tapestry.services.ResponseRenderer; 025 import org.apache.tapestry.services.ServiceConstants; 026 027 /** 028 * An implementation of the home service that renders the Home page. This is the most likely 029 * candidate for overriding ... for example, to select the page to render based on known information 030 * about the user (stored as a cookie). 031 * 032 * @author Howard Lewis Ship 033 * @since 1.0.9 034 */ 035 036 public class HomeService implements IEngineService 037 { 038 /** @since 4.0 */ 039 private ResponseRenderer _responseRenderer; 040 041 /** @since 4.0 */ 042 043 private LinkFactory _linkFactory; 044 045 /** @since 4.0 */ 046 047 private String _pageName; 048 049 public ILink getLink(boolean post, Object parameter) 050 { 051 if (parameter != null) 052 throw new IllegalArgumentException(EngineMessages.serviceNoParameter(this)); 053 054 Map parameters = new HashMap(); 055 056 parameters.put(ServiceConstants.SERVICE, getName()); 057 058 return _linkFactory.constructLink(this, post, parameters, true); 059 } 060 061 public void service(IRequestCycle cycle) throws IOException 062 { 063 cycle.activate(_pageName); 064 065 _responseRenderer.renderResponse(cycle); 066 } 067 068 public String getName() 069 { 070 return Tapestry.HOME_SERVICE; 071 } 072 073 /** @since 4.0 */ 074 public void setResponseRenderer(ResponseRenderer responseRenderer) 075 { 076 _responseRenderer = responseRenderer; 077 } 078 079 /** @since 4.0 */ 080 public void setLinkFactory(LinkFactory linkFactory) 081 { 082 _linkFactory = linkFactory; 083 } 084 085 /** @since 4.0 */ 086 public void setPageName(String pageName) 087 { 088 _pageName = pageName; 089 } 090 091 /** @since 4.0 */ 092 public String getPageName() 093 { 094 return _pageName; 095 } 096 }