001 // Copyright 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.portlet; 016 017 import javax.portlet.PortletConfig; 018 019 import org.apache.hivemind.Resource; 020 import org.apache.tapestry.parse.ISpecificationParser; 021 import org.apache.tapestry.services.ApplicationGlobals; 022 import org.apache.tapestry.spec.ApplicationSpecification; 023 import org.apache.tapestry.spec.IApplicationSpecification; 024 import org.apache.tapestry.web.WebContext; 025 import org.apache.tapestry.web.WebContextResource; 026 027 /** 028 * Locates and reads the application specification for the portlet and stores it into 029 * {@link org.apache.tapestry.services.ApplicationGlobals}. 030 * <p> 031 * TODO: Merge this code with 032 * {@link org.apache.tapestry.services.impl.ApplicationSpecificationInitializer}, they're very 033 * similar. This would probably be an additional service that would do the lookup based on the 034 * {@link org.apache.tapestry.web.WebActivator} and the {@link org.apache.tapestry.web.WebContext}. 035 * 036 * @author Howard M. Lewis Ship 037 * @since 4.0 038 * @see org.apache.tapestry.services.impl.ApplicationSpecificationInitializer 039 */ 040 public class PortletApplicationSpecificationInitializer implements PortletApplicationInitializer 041 { 042 private WebContext _context; 043 044 private ApplicationGlobals _globals; 045 046 private ISpecificationParser _parser; 047 048 public void initialize(PortletConfig portletConfig) 049 { 050 String name = portletConfig.getPortletName(); 051 052 Resource resource = findApplicationSpecification(name); 053 054 IApplicationSpecification specification = resource == null ? constructStandinSpecification(name) 055 : _parser.parseApplicationSpecification(resource); 056 057 _globals.storeSpecification(specification); 058 } 059 060 private Resource findApplicationSpecification(String name) 061 { 062 String expectedName = name + ".application"; 063 064 Resource webInfLocation = new WebContextResource(_context, "/WEB-INF/"); 065 Resource webInfAppLocation = webInfLocation.getRelativeResource(name + "/"); 066 067 Resource result = check(webInfAppLocation, expectedName); 068 if (result != null) 069 return result; 070 071 return check(webInfLocation, expectedName); 072 } 073 074 private Resource check(Resource resource, String name) 075 { 076 Resource result = resource.getRelativeResource(name); 077 078 if (result.getResourceURL() != null) 079 return result; 080 081 return null; 082 } 083 084 private IApplicationSpecification constructStandinSpecification(String name) 085 { 086 ApplicationSpecification result = new ApplicationSpecification(); 087 088 // Pretend the file exists in the most common expected location. 089 090 Resource virtualLocation = new WebContextResource(_context, "/WEB-INF/" + name 091 + ".application"); 092 093 result.setSpecificationLocation(virtualLocation); 094 095 result.setName(name); 096 097 return result; 098 } 099 100 public void setContext(WebContext context) 101 { 102 _context = context; 103 } 104 105 public void setGlobals(ApplicationGlobals globals) 106 { 107 _globals = globals; 108 } 109 110 public void setParser(ISpecificationParser parser) 111 { 112 _parser = parser; 113 } 114 }