Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
SimpleVariableContext |
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| 1.75;1.75 |
1 | /* | |
2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/SimpleVariableContext.java,v 1.19 2006/06/03 20:19:54 elharo Exp $ | |
3 | * $Revision: 1.19 $ | |
4 | * $Date: 2006/06/03 20:19:54 $ | |
5 | * | |
6 | * ==================================================================== | |
7 | * | |
8 | * Copyright 2000-2002 bob mcwhirter & James Strachan. | |
9 | * All rights reserved. | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions are | |
13 | * met: | |
14 | * | |
15 | * * Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * | |
18 | * * Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * | |
22 | * * Neither the name of the Jaxen Project nor the names of its | |
23 | * contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS | |
27 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | |
28 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A | |
29 | * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER | |
30 | * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
31 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
32 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
33 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
34 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
35 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
36 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
37 | * | |
38 | * ==================================================================== | |
39 | * This software consists of voluntary contributions made by many | |
40 | * individuals on behalf of the Jaxen Project and was originally | |
41 | * created by bob mcwhirter <bob@werken.com> and | |
42 | * James Strachan <jstrachan@apache.org>. For more information on the | |
43 | * Jaxen Project, please see <http://www.jaxen.org/>. | |
44 | * | |
45 | * $Id: SimpleVariableContext.java,v 1.19 2006/06/03 20:19:54 elharo Exp $ | |
46 | */ | |
47 | ||
48 | ||
49 | package org.jaxen; | |
50 | ||
51 | import java.io.Serializable; | |
52 | import java.util.HashMap; | |
53 | import java.util.Map; | |
54 | ||
55 | /** Simple default implementation for <code>VariableContext</code>. | |
56 | * | |
57 | * <p> | |
58 | * This is a simple table-based key-lookup implementation | |
59 | * for <code>VariableContext</code> which can be programmatically | |
60 | * extended by setting additional variables. | |
61 | * </p> | |
62 | * | |
63 | * @author <a href="mailto:bob@werken.com">bob mcwhirter</a> | |
64 | */ | |
65 | public class SimpleVariableContext implements VariableContext, Serializable | |
66 | { | |
67 | /** | |
68 | * | |
69 | */ | |
70 | private static final long serialVersionUID = 961322093794516518L; | |
71 | /** Table of variable bindings. */ | |
72 | private Map variables; | |
73 | ||
74 | /** Construct. | |
75 | * | |
76 | * <p> | |
77 | * Create a new empty variable context. | |
78 | * </p> | |
79 | */ | |
80 | public SimpleVariableContext() | |
81 | 1714 | { |
82 | 1714 | variables = new HashMap(); |
83 | 1714 | } |
84 | ||
85 | /** Set the value associated with a variable. | |
86 | * | |
87 | * <p> | |
88 | * This method sets a variable that is | |
89 | * associated with a particular namespace. | |
90 | * These variables appear such as <code>$prefix:foo</code> | |
91 | * in an XPath expression. Prefix to URI resolution | |
92 | * is the responsibility of a <code>NamespaceContext</code>. | |
93 | * Variables within a <code>VariableContext</code> are | |
94 | * referred to purely based upon their namespace URI, | |
95 | * if any. | |
96 | * </p> | |
97 | * | |
98 | * @param namespaceURI the namespace URI of the variable | |
99 | * @param localName the local name of the variable | |
100 | * @param value The value to be bound to the variable | |
101 | */ | |
102 | public void setVariableValue( String namespaceURI, | |
103 | String localName, | |
104 | Object value ) | |
105 | { | |
106 | 16 | this.variables.put( new QualifiedName(namespaceURI, localName), |
107 | value ); | |
108 | 16 | } |
109 | ||
110 | /** Set the value associated with a variable. | |
111 | * | |
112 | * <p> | |
113 | * This method sets a variable that is <strong>not</strong> | |
114 | * associated with any particular namespace. | |
115 | * These variables look like <code>$foo</code> | |
116 | * in an XPath expression. | |
117 | * </p> | |
118 | * | |
119 | * @param localName the local name of the variable | |
120 | * @param value the value to be bound to the variable | |
121 | */ | |
122 | public void setVariableValue( String localName, | |
123 | Object value ) | |
124 | { | |
125 | 8 | this.variables.put( new QualifiedName(null, localName), value ); |
126 | 8 | } |
127 | ||
128 | public Object getVariableValue( String namespaceURI, | |
129 | String prefix, | |
130 | String localName ) | |
131 | throws UnresolvableException | |
132 | { | |
133 | 42 | QualifiedName key = new QualifiedName( namespaceURI, localName ); |
134 | ||
135 | 42 | if ( this.variables.containsKey(key) ) |
136 | { | |
137 | 38 | return this.variables.get( key ); |
138 | } | |
139 | else | |
140 | { | |
141 | 4 | throw new UnresolvableException( "Variable " + key.getClarkForm() ); |
142 | } | |
143 | } | |
144 | } |