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.jstl.core;
20
21 import javax.el.ELContext;
22 import javax.el.ValueExpression;
23
24 /**
25 * @author Jacob Hookom
26 * @version $Id$
27 */
28 public final class IndexedValueExpression extends ValueExpression
29 {
30
31 /**
32 *
33 */
34 private static final long serialVersionUID = 1L;
35
36 private final Integer i;
37
38 private final ValueExpression orig;
39
40 /**
41 *
42 */
43 public IndexedValueExpression(ValueExpression orig, int i)
44 {
45 this.i = Integer.valueOf(i);
46 this.orig = orig;
47 }
48
49 /*
50 * (non-Javadoc)
51 *
52 * @see javax.el.ValueExpression#getValue(javax.el.ELContext)
53 */
54 public Object getValue(ELContext context)
55 {
56 Object base = this.orig.getValue(context);
57 if (base != null)
58 {
59 context.setPropertyResolved(false);
60 return context.getELResolver().getValue(context, base, i);
61 }
62 return null;
63 }
64
65 /*
66 * (non-Javadoc)
67 *
68 * @see javax.el.ValueExpression#setValue(javax.el.ELContext, java.lang.Object)
69 */
70 public void setValue(ELContext context, Object value)
71 {
72 Object base = this.orig.getValue(context);
73 if (base != null)
74 {
75 context.setPropertyResolved(false);
76 context.getELResolver().setValue(context, base, i, value);
77 }
78 }
79
80 /*
81 * (non-Javadoc)
82 *
83 * @see javax.el.ValueExpression#isReadOnly(javax.el.ELContext)
84 */
85 public boolean isReadOnly(ELContext context)
86 {
87 Object base = this.orig.getValue(context);
88 if (base != null)
89 {
90 context.setPropertyResolved(false);
91 return context.getELResolver().isReadOnly(context, base, i);
92 }
93 return true;
94 }
95
96 /*
97 * (non-Javadoc)
98 *
99 * @see javax.el.ValueExpression#getType(javax.el.ELContext)
100 */
101 public Class getType(ELContext context)
102 {
103 Object base = this.orig.getValue(context);
104 if (base != null)
105 {
106 context.setPropertyResolved(false);
107 return context.getELResolver().getType(context, base, i);
108 }
109 return null;
110 }
111
112 /*
113 * (non-Javadoc)
114 *
115 * @see javax.el.ValueExpression#getExpectedType()
116 */
117 public Class getExpectedType()
118 {
119 return Object.class;
120 }
121
122 /*
123 * (non-Javadoc)
124 *
125 * @see javax.el.Expression#getExpressionString()
126 */
127 public String getExpressionString()
128 {
129 return this.orig.getExpressionString();
130 }
131
132 /*
133 * (non-Javadoc)
134 *
135 * @see javax.el.Expression#equals(java.lang.Object)
136 */
137 public boolean equals(Object obj)
138 {
139 return this.orig.equals(obj);
140 }
141
142 /*
143 * (non-Javadoc)
144 *
145 * @see javax.el.Expression#hashCode()
146 */
147 public int hashCode()
148 {
149 return this.orig.hashCode();
150 }
151
152 /*
153 * (non-Javadoc)
154 *
155 * @see javax.el.Expression#isLiteralText()
156 */
157 public boolean isLiteralText()
158 {
159 return false;
160 }
161
162 }