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
029 * into {@link org.apache.tapestry.services.ApplicationGlobals}.
030 * <p>
031 * TODO: Merge this code with
032 * {@link org.apache.tapestry.services.impl.ApplicationSpecificationInitializer},
033 * they're very similar. This would probably be an additional service that would
034 * do the lookup based on the {@link org.apache.tapestry.web.WebActivator} and
035 * the {@link org.apache.tapestry.web.WebContext}.
036 *
037 * @author Howard M. Lewis Ship
038 * @since 4.0
039 * @see org.apache.tapestry.services.impl.ApplicationSpecificationInitializer
040 */
041 public class PortletApplicationSpecificationInitializer implements
042 PortletApplicationInitializer
043 {
044
045 private WebContext _context;
046
047 private ApplicationGlobals _globals;
048
049 private ISpecificationParser _parser;
050
051 public void initialize(PortletConfig portletConfig)
052 {
053 String name = portletConfig.getPortletName();
054
055 Resource resource = findApplicationSpecification(name);
056
057 IApplicationSpecification specification = resource == null ? constructStandinSpecification(name)
058 : _parser.parseApplicationSpecification(resource);
059
060 _globals.storeSpecification(specification);
061 }
062
063 private Resource findApplicationSpecification(String name)
064 {
065 String expectedName = name + ".application";
066
067 Resource webInfLocation = new WebContextResource(_context, "/WEB-INF/");
068 Resource webInfAppLocation = webInfLocation.getRelativeResource(name
069 + "/");
070
071 Resource result = check(webInfAppLocation, expectedName);
072 if (result != null) return result;
073
074 return check(webInfLocation, expectedName);
075 }
076
077 private Resource check(Resource resource, String name)
078 {
079 Resource result = resource.getRelativeResource(name);
080
081 if (result.getResourceURL() != null) return result;
082
083 return null;
084 }
085
086 private IApplicationSpecification constructStandinSpecification(String name)
087 {
088 ApplicationSpecification result = new ApplicationSpecification();
089
090 // Pretend the file exists in the most common expected location.
091
092 Resource virtualLocation = new WebContextResource(_context, "/WEB-INF/"
093 + name + ".application");
094
095 result.setSpecificationLocation(virtualLocation);
096
097 result.setName(name);
098
099 return result;
100 }
101
102 public void setContext(WebContext context)
103 {
104 _context = context;
105 }
106
107 public void setGlobals(ApplicationGlobals globals)
108 {
109 _globals = globals;
110 }
111
112 public void setParser(ISpecificationParser parser)
113 {
114 _parser = parser;
115 }
116 }