Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
SimpleVariableContext |
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| 1.75;1.75 |
1 | /* |
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2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/SimpleVariableContext.java,v 1.16 2005/09/25 11:39:21 elharo Exp $ |
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3 | * $Revision: 1.16 $ |
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4 | * $Date: 2005/09/25 11:39:21 $ |
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5 | * |
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6 | * ==================================================================== |
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7 | * |
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8 | * Copyright (C) 2000-2002 bob mcwhirter & James Strachan. |
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9 | * All rights reserved. |
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10 | * |
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11 | * Redistribution and use in source and binary forms, with or without |
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12 | * modification, are permitted provided that the following conditions |
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13 | * are met: |
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14 | * |
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15 | * 1. Redistributions of source code must retain the above copyright |
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16 | * notice, this list of conditions, and the following disclaimer. |
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17 | * |
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18 | * 2. Redistributions in binary form must reproduce the above copyright |
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19 | * notice, this list of conditions, and the disclaimer that follows |
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20 | * these conditions in the documentation and/or other materials |
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21 | * provided with the distribution. |
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22 | * |
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23 | * 3. The name "Jaxen" must not be used to endorse or promote products |
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24 | * derived from this software without prior written permission. For |
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25 | * written permission, please contact license@jaxen.org. |
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26 | * |
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27 | * 4. Products derived from this software may not be called "Jaxen", nor |
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28 | * may "Jaxen" appear in their name, without prior written permission |
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29 | * from the Jaxen Project Management (pm@jaxen.org). |
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30 | * |
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31 | * In addition, we request (but do not require) that you include in the |
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32 | * end-user documentation provided with the redistribution and/or in the |
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33 | * software itself an acknowledgement equivalent to the following: |
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34 | * "This product includes software developed by the |
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35 | * Jaxen Project <http://www.jaxen.org/>." |
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36 | * Alternatively, the acknowledgment may be graphical using the logos |
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37 | * available at http://www.jaxen.org/ |
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38 | * |
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39 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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40 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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41 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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42 | * DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT |
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43 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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45 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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46 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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47 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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48 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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49 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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50 | * SUCH DAMAGE. |
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51 | * |
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52 | * ==================================================================== |
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53 | * This software consists of voluntary contributions made by many |
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54 | * individuals on behalf of the Jaxen Project and was originally |
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55 | * created by bob mcwhirter <bob@werken.com> and |
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56 | * James Strachan <jstrachan@apache.org>. For more information on the |
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57 | * Jaxen Project, please see <http://www.jaxen.org/>. |
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58 | * |
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59 | * $Id: SimpleVariableContext.java,v 1.16 2005/09/25 11:39:21 elharo Exp $ |
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60 | */ |
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61 | ||
62 | ||
63 | package org.jaxen; |
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64 | ||
65 | import java.io.Serializable; |
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66 | import java.util.HashMap; |
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67 | import java.util.Map; |
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68 | ||
69 | /** Simple default implementation for <code>VariableContext</code>. |
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70 | * |
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71 | * <p> |
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72 | * This is a simple table-based key-lookup implementation |
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73 | * for <code>VariableContext</code> which can be programmatically |
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74 | * extended by setting additional variables. |
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75 | * </p> |
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76 | * |
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77 | * @author <a href="mailto:bob@werken.com">bob mcwhirter</a> |
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78 | */ |
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79 | public class SimpleVariableContext implements VariableContext, Serializable |
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80 | { |
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81 | /** Table of variable bindings. */ |
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82 | private Map variables; |
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83 | ||
84 | /** Construct. |
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85 | * |
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86 | * <p> |
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87 | * Create a new empty variable context. |
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88 | * </p> |
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89 | */ |
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90 | public SimpleVariableContext() |
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91 | 4920 | { |
92 | 4920 | variables = new HashMap(); |
93 | 4920 | } |
94 | ||
95 | /** Set the value associated with a variable. |
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96 | * |
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97 | * <p> |
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98 | * This method sets a variable that is |
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99 | * associated with a particular namespace. |
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100 | * These variables appear such as <code>$prefix:foo</code> |
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101 | * in an XPath expression. Prefix to URI resolution |
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102 | * is the responsibility of a <code>NamespaceContext</code>. |
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103 | * Variables within a <code>VariableContext</code> are |
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104 | * referred to purely based upon their namespace URI, |
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105 | * if any. |
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106 | * </p> |
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107 | * |
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108 | * @param namespaceURI the namespace URI of the variable |
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109 | * @param localName the local name of the variable |
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110 | * @param value The value to be bound to the variable |
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111 | */ |
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112 | public void setVariableValue( String namespaceURI, |
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113 | String localName, |
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114 | Object value ) |
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115 | { |
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116 | 48 | this.variables.put( new QualifiedName(namespaceURI, null, localName), |
117 | value ); |
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118 | 48 | } |
119 | ||
120 | /** Set the value associated with a variable. |
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121 | * |
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122 | * <p> |
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123 | * This method sets a variable that is <strong>not</strong> |
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124 | * associated with any particular namespace. |
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125 | * These variables look like <code>$foo</code> |
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126 | * in an XPath expression. |
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127 | * </p> |
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128 | * |
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129 | * @param localName the local name of the variable |
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130 | * @param value the value to be bound to the variable |
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131 | */ |
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132 | public void setVariableValue( String localName, |
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133 | Object value ) |
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134 | { |
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135 | 6 | this.variables.put( new QualifiedName(null, null, localName), value ); |
136 | 6 | } |
137 | ||
138 | public Object getVariableValue( String namespaceURI, |
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139 | String prefix, |
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140 | String localName ) |
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141 | throws UnresolvableException |
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142 | { |
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143 | 90 | QualifiedName key = new QualifiedName( namespaceURI, prefix, localName ); |
144 | ||
145 | 90 | if ( this.variables.containsKey(key) ) |
146 | { |
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147 | 78 | return this.variables.get( key ); |
148 | } |
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149 | else |
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150 | { |
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151 | 12 | throw new UnresolvableException( "Variable " + key.getClarkForm() ); |
152 | } |
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153 | } |
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154 | } |