| 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 | } |