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.el.unified.resolver.implicitobject;
20
21 import java.beans.FeatureDescriptor;
22 import java.util.List;
23
24 import javax.el.ELContext;
25 import javax.faces.component.UIComponent;
26 import javax.faces.context.FacesContext;
27
28 import org.apache.myfaces.view.facelets.el.CompositeComponentELUtils;
29
30 /**
31 * Encapsulates information needed by the ImplicitObjectResolver
32 *
33 * @author Leonardo Uribe (latest modification by $Author$)
34 * @version $Revision$ $Date$
35 */
36 public class CompositeComponentImplicitObject extends ImplicitObject
37 {
38
39 private static final String NAME = "cc";
40
41 /** Creates a new instance of CompositeComponentImplicitObjectImplicitObject */
42 public CompositeComponentImplicitObject()
43 {
44 }
45
46 @Override
47 public Object getValue(ELContext context)
48 {
49 FacesContext facesContext = facesContext(context);
50
51 // Look for the attribute set by LocationValueExpression
52 // or LocationMethodExpression on the FacesContext
53 List<UIComponent> list = (List<UIComponent>) facesContext.getAttributes()
54 .get(CompositeComponentELUtils.CURRENT_COMPOSITE_COMPONENT_KEY);
55
56 UIComponent cc = null;
57
58 if (list != null && !list.isEmpty())
59 {
60 cc = list.get(list.size()-1);
61 }
62 if (cc == null)
63 {
64 // take the composite component from the stack
65 cc = UIComponent.getCurrentCompositeComponent(facesContext(context));
66 }
67 return cc;
68 }
69
70 @Override
71 public String getName()
72 {
73 return NAME;
74 }
75
76 @Override
77 public Class<?> getType()
78 {
79 return null;
80 }
81
82 @Override
83 public FeatureDescriptor getDescriptor()
84 {
85 return makeDescriptor(NAME,
86 "Represents the composite component most recently pushed using UIComponent.pushComponentToEL",
87 UIComponent.class);
88 }
89 }