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Java > Open Source Codes > org > apache > cocoon > components > treeprocessor > variables > NOPVariableResolver


1 /*
2  * Copyright 1999-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */

16 package org.apache.cocoon.components.treeprocessor.variables;
17
18 import org.apache.cocoon.components.treeprocessor.InvokeContext;
19
20 import java.util.Map JavaDoc;
21
22 /**
23  * No-op implementation of {@link VariableResolver} for constant expressions
24  *
25  * @version CVS $Id: NOPVariableResolver.java 30932 2004-07-29 17:35:38Z vgritsenko $
26  */

27 public class NOPVariableResolver extends VariableResolver {
28
29     private String JavaDoc expression = null;
30
31     public NOPVariableResolver(String JavaDoc expression) {
32         super(expression);
33         if (expression != null) {
34             this.expression = VariableResolverFactory.unescape(expression);
35         }
36     }
37
38     public final String JavaDoc resolve(InvokeContext context, Map JavaDoc objectModel) {
39         return this.expression;
40     }
41     
42     public final void release() {
43         // Nothing to do
44
}
45 }
46
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