| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| SimpleVariableContext |
|
| 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 | } |