1
2
3
4
5
6
7
8
9
10
11
12
13
14
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 keyword;
30 private Object object;
31
32 public KeywordVariables(String keyword, Object object) {
33 this.keyword = keyword;
34 this.object = object;
35 }
36
37 public boolean isDeclaredVariable(String variable) {
38 return variable.equals(keyword);
39 }
40
41 public Object getVariable(String variable) {
42 if (variable.equals(keyword)) {
43 return object;
44 }
45 return null;
46 }
47
48 public void declareVariable(String variable, Object value) {
49 throw new UnsupportedOperationException(
50 "Cannot declare new keyword variables.");
51 }
52
53 public void undeclareVariable(String variable) {
54 throw new UnsupportedOperationException(
55 "Cannot declare new keyword variables.");
56 }
57 }