KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > commons > jxpath > servlet > KeywordVariables


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.commons.jxpath.servlet;
17
18 import org.apache.commons.jxpath.Variables;
19
20 /**
21  * Implementation of the Variables interface that provides access
22  * to a single object using a reserved name (keyword).
23  *
24  * @author Dmitri Plotnikov
25  * @version $Revision: 1.6 $ $Date: 2004/02/29 14:17:40 $
26  */
27 public class KeywordVariables implements Variables {
28
29     private String JavaDoc keyword;
30     private Object JavaDoc object;
31
32     public KeywordVariables(String JavaDoc keyword, Object JavaDoc object) {
33         this.keyword = keyword;
34         this.object = object;
35     }
36
37     public boolean isDeclaredVariable(String JavaDoc variable) {
38         return variable.equals(keyword);
39     }
40
41     public Object JavaDoc getVariable(String JavaDoc variable) {
42         if (variable.equals(keyword)) {
43             return object;
44         }
45         return null;
46     }
47
48     public void declareVariable(String JavaDoc variable, Object JavaDoc value) {
49         throw new UnsupportedOperationException JavaDoc(
50             "Cannot declare new keyword variables.");
51     }
52
53     public void undeclareVariable(String JavaDoc variable) {
54         throw new UnsupportedOperationException JavaDoc(
55             "Cannot declare new keyword variables.");
56     }
57 }
58
Popular Tags