View Javadoc

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.SortActionSource;
23  import org.apache.myfaces.tobago.event.SortActionSource2;
24  
25  import javax.faces.event.ActionEvent;
26  import javax.faces.view.facelets.FaceletContext;
27  import javax.faces.view.facelets.MetaRule;
28  import javax.faces.view.facelets.Metadata;
29  import javax.faces.view.facelets.MetadataTarget;
30  import javax.faces.view.facelets.TagAttribute;
31  
32  public class SortActionSourceRule extends MetaRule {
33  
34    static final Class[] ACTION_LISTENER = new Class[]{ActionEvent.class};
35  
36    public static final SortActionSourceRule INSTANCE = new SortActionSourceRule();
37  
38    public Metadata applyRule(final String name, final TagAttribute attribute,
39        final MetadataTarget metadataTarget) {
40      if (metadataTarget.isTargetInstanceOf(SortActionSource.class)) {
41        if ("sortActionListener".equals(name)) {
42          return new SortActionListenerMapper(attribute);
43        }
44      }
45      return null;
46    }
47  
48    static final class SortActionListenerMapper extends Metadata {
49  
50      private final TagAttribute attribute;
51  
52      public SortActionListenerMapper(final TagAttribute attribute) {
53        this.attribute = attribute;
54      }
55  
56      public void applyMetadata(final FaceletContext ctx, final Object instance) {
57        ((SortActionSource2) instance).setSortActionListenerExpression(
58            attribute.getMethodExpression(ctx, null, SortActionSourceRule.ACTION_LISTENER));
59      }
60    }
61  
62  }