1 /* 2 * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/DefaultAbsoluteLocationPath.java,v 1.15 2005/09/06 13:41:01 elharo Exp $ 3 * $Revision: 1.15 $ 4 * $Date: 2005/09/06 13:41:01 $ 5 * 6 * ==================================================================== 7 * 8 * Copyright (C) 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 13 * are met: 14 * 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions, and the following disclaimer. 17 * 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions, and the disclaimer that follows 20 * these conditions in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * 3. The name "Jaxen" must not be used to endorse or promote products 24 * derived from this software without prior written permission. For 25 * written permission, please contact license@jaxen.org. 26 * 27 * 4. Products derived from this software may not be called "Jaxen", nor 28 * may "Jaxen" appear in their name, without prior written permission 29 * from the Jaxen Project Management (pm@jaxen.org). 30 * 31 * In addition, we request (but do not require) that you include in the 32 * end-user documentation provided with the redistribution and/or in the 33 * software itself an acknowledgement equivalent to the following: 34 * "This product includes software developed by the 35 * Jaxen Project <http://www.jaxen.org/>." 36 * Alternatively, the acknowledgment may be graphical using the logos 37 * available at http://www.jaxen.org/ 38 * 39 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 40 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 41 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 42 * DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT 43 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 45 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 46 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 47 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 48 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 49 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * ==================================================================== 53 * This software consists of voluntary contributions made by many 54 * individuals on behalf of the Jaxen Project and was originally 55 * created by bob mcwhirter <bob@werken.com> and 56 * James Strachan <jstrachan@apache.org>. For more information on the 57 * Jaxen Project, please see <http://www.jaxen.org/>. 58 * 59 * $Id: DefaultAbsoluteLocationPath.java,v 1.15 2005/09/06 13:41:01 elharo Exp $ 60 */ 61 package org.jaxen.expr; 62 63 import java.util.Collections; 64 import java.util.List; 65 66 import org.jaxen.Context; 67 import org.jaxen.ContextSupport; 68 import org.jaxen.JaxenException; 69 import org.jaxen.Navigator; 70 import org.jaxen.util.SingletonList; 71 72 /*** 73 * @deprecated this class will become non-public in the future; 74 * use the interface instead 75 */ 76 public class DefaultAbsoluteLocationPath extends DefaultLocationPath 77 { 78 public DefaultAbsoluteLocationPath() 79 { 80 } 81 82 public String toString() 83 { 84 return "[(DefaultAbsoluteLocationPath): " + super.toString() + "]"; 85 } 86 87 public boolean isAbsolute() 88 { 89 return true; 90 } 91 92 public String getText() 93 { 94 return "/" + super.getText(); 95 } 96 97 public Object evaluate(Context context) throws JaxenException 98 { 99 ContextSupport support = context.getContextSupport(); 100 Navigator nav = support.getNavigator(); 101 Context absContext = new Context( support ); 102 List contextNodes = context.getNodeSet(); 103 104 if ( contextNodes.isEmpty() ) 105 { 106 return Collections.EMPTY_LIST; 107 } 108 109 Object firstNode = contextNodes.get( 0 ); 110 Object docNode = nav.getDocumentNode( firstNode ); 111 112 if ( docNode == null ) 113 { 114 return Collections.EMPTY_LIST; 115 } 116 117 List list = new SingletonList(docNode); 118 119 absContext.setNodeSet( list ); 120 121 return super.evaluate( absContext ); 122 } 123 124 public void accept(Visitor visitor) 125 { 126 visitor.visit(this); 127 } 128 } 129