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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.myfaces.view.facelets.tag.composite;
20  
21  import java.beans.BeanDescriptor;
22  import java.beans.IntrospectionException;
23  import java.beans.PropertyDescriptor;
24  import java.io.IOException;
25  import java.util.HashMap;
26  import java.util.Map;
27  import java.util.logging.Level;
28  import java.util.logging.Logger;
29  
30  import javax.faces.component.UIComponent;
31  import javax.faces.view.Location;
32  import javax.faces.view.facelets.FaceletContext;
33  import javax.faces.view.facelets.TagConfig;
34  import javax.faces.view.facelets.TagException;
35  import javax.faces.view.facelets.TagHandler;
36  
37  import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFFaceletTag;
38  import org.apache.myfaces.view.facelets.AbstractFaceletContext;
39  import org.apache.myfaces.view.facelets.FaceletCompositionContext;
40  
41  /**
42   * @author Leonardo Uribe (latest modification by $Author: struberg $)
43   * @version $Revision: 1194861 $ $Date: 2011-10-29 05:02:34 -0500 (Sat, 29 Oct 2011) $
44   */
45  @JSFFaceletTag(name="composite:implementation")
46  public class ImplementationHandler extends TagHandler
47  {
48      //private static final Log log = LogFactory.getLog(ImplementationHandler.class);
49      private static final Logger log = Logger.getLogger(ImplementationHandler.class.getName());
50      
51      public final static String NAME = "implementation";
52  
53      public ImplementationHandler(TagConfig config)
54      {
55          super(config);
56      }
57  
58      public void apply(FaceletContext ctx, UIComponent parent)
59              throws IOException
60      {
61          if (!((AbstractFaceletContext)ctx).isBuildingCompositeComponentMetadata())
62          {
63              // If this tag is found in a facelet, the compiler has trimmed all
64              // tags outside this one excluding composite:interface, so "parent"
65              // is a component used as value for the facet key
66              // UIComponent.COMPOSITE_FACET_NAME in a composite component. 
67              nextHandler.apply(ctx, parent);
68          }
69          else
70          {
71              UIComponent compositeBaseParent
72                      = FaceletCompositionContext.getCurrentInstance(ctx).getCompositeComponentFromStack();
73              // Register the facet UIComponent.COMPOSITE_FACET_NAME
74              CompositeComponentBeanInfo beanInfo = 
75                  (CompositeComponentBeanInfo) compositeBaseParent.getAttributes()
76                  .get(UIComponent.BEANINFO_KEY);
77              
78              if (beanInfo == null)
79              {
80                  if (log.isLoggable(Level.SEVERE))
81                  {
82                      log.severe("Cannot find composite bean descriptor UIComponent.BEANINFO_KEY ");
83                  }
84                  return;
85              }
86              
87              BeanDescriptor beanDescriptor = beanInfo.getBeanDescriptor();
88              
89              Map<String, PropertyDescriptor> facetPropertyDescriptorMap = 
90                  (Map<String, PropertyDescriptor>) beanDescriptor.getValue(UIComponent.FACETS_KEY);
91          
92              if (facetPropertyDescriptorMap == null)
93              {
94                  facetPropertyDescriptorMap = new HashMap<String, PropertyDescriptor>();
95                  beanDescriptor.setValue(UIComponent.FACETS_KEY, facetPropertyDescriptorMap);
96              }
97              
98              if (!facetPropertyDescriptorMap.containsKey(UIComponent.COMPOSITE_FACET_NAME))
99              {
100                 try
101                 {
102                     facetPropertyDescriptorMap.put(UIComponent.COMPOSITE_FACET_NAME, 
103                             new CompositeComponentPropertyDescriptor(UIComponent.COMPOSITE_FACET_NAME));
104                 }
105                 catch (IntrospectionException e)
106                 {
107                     if (log.isLoggable(Level.SEVERE))
108                     {
109                         log.log(Level.SEVERE, "Cannot create PropertyDescriptor for facet ",e);
110                     }
111                     throw new TagException(tag,e);
112                 }
113             }
114             
115             // Pass to nextHandler, to give the chance to cc:insertChildren, cc:insertFacet and cc:renderFacet
116             // to save metadata information.
117             nextHandler.apply(ctx, parent);
118         }
119     }
120     
121     public Location getLocation()
122     {
123         return this.tag.getLocation();
124     }
125 }