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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  
20  package org.apache.myfaces.tobago.facelets;
21  
22  import org.apache.myfaces.tobago.event.TabChangeEvent;
23  import org.apache.myfaces.tobago.event.TabChangeSource2;
24  
25  import javax.faces.view.facelets.FaceletContext;
26  import javax.faces.view.facelets.MetaRule;
27  import javax.faces.view.facelets.Metadata;
28  import javax.faces.view.facelets.MetadataTarget;
29  import javax.faces.view.facelets.TagAttribute;
30  
31  public class TabChangeSourceRule extends MetaRule {
32    static final Class[] ACTION_LISTENER = new Class[]{TabChangeEvent.class};
33    public static final TabChangeSourceRule INSTANCE = new TabChangeSourceRule();
34  
35    public Metadata applyRule(String name, TagAttribute attribute, MetadataTarget metadataTarget) {
36      if (metadataTarget.isTargetInstanceOf(TabChangeSource2.class)) {
37        if ("tabChangeListener".equals(name)) {
38          return new TabChangeListenerMapper(attribute);
39        }
40      }
41      return null;
42    }
43  
44    static final class TabChangeListenerMapper extends Metadata {
45  
46      private final TagAttribute attribute;
47  
48      public TabChangeListenerMapper(TagAttribute attribute) {
49        this.attribute = attribute;
50      }
51  
52      public void applyMetadata(FaceletContext ctx, Object instance) {
53        ((TabChangeSource2) instance).setTabChangeListenerExpression(
54            attribute.getMethodExpression(ctx, null, TabChangeSourceRule.ACTION_LISTENER));
55      }
56    }
57  }