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 }