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1 /* 2 * $Header: /home/cvs/jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/xml/ExprTag.java,v 1.8 2002/05/20 10:09:28 jstrachan Exp $ 3 * $Revision: 1.8 $ 4 * $Date: 2002/05/20 10:09:28 $ 5 * 6 * ==================================================================== 7 * 8 * The Apache Software License, Version 1.1 9 * 10 * Copyright (c) 1999-2002 The Apache Software Foundation. All rights 11 * reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in 22 * the documentation and/or other materials provided with the 23 * distribution. 24 * 25 * 3. The end-user documentation included with the redistribution, if 26 * any, must include the following acknowlegement: 27 * "This product includes software developed by the 28 * Apache Software Foundation (http://www.apache.org/)." 29 * Alternately, this acknowlegement may appear in the software itself, 30 * if and wherever such third-party acknowlegements normally appear. 31 * 32 * 4. The names "The Jakarta Project", "Commons", and "Apache Software 33 * Foundation" must not be used to endorse or promote products derived 34 * from this software without prior written permission. For written 35 * permission, please contact apache@apache.org. 36 * 37 * 5. Products derived from this software may not be called "Apache" 38 * nor may "Apache" appear in their names without prior written 39 * permission of the Apache Group. 40 * 41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 52 * SUCH DAMAGE. 53 * ==================================================================== 54 * 55 * This software consists of voluntary contributions made by many 56 * individuals on behalf of the Apache Software Foundation. For more 57 * information on the Apache Software Foundation, please see 58 * <http://www.apache.org/>;. 59 * 60 * $Id: ExprTag.java,v 1.8 2002/05/20 10:09:28 jstrachan Exp $ 61 */ 62 package org.apache.commons.jelly.tags.xml; 63 64 import java.util.Iterator; 65 import java.util.List; 66 67 import org.apache.commons.jelly.JellyContext; 68 import org.apache.commons.jelly.JellyException; 69 import org.apache.commons.jelly.MissingAttributeException; 70 import org.apache.commons.jelly.TagSupport; 71 import org.apache.commons.jelly.XMLOutput; 72 73 import org.dom4j.Element; 74 import org.dom4j.Node; 75 import org.dom4j.io.SAXWriter; 76 77 import org.jaxen.XPath; 78 79 /*** 80 * A tag which performs a copy operation like the XSLT tag, 81 * performing a shallow copy of the element and its attributes but no content. 82 * 83 * @author James Strachan 84 */ 85 public class CopyTag extends XPathTagSupport { 86 87 /*** The XPath expression to evaluate. */ 88 private XPath select; 89 90 public CopyTag() { 91 } 92 93 // Tag interface 94 //------------------------------------------------------------------------- 95 public void doTag(XMLOutput output) throws Exception { 96 Object xpathContext = getXPathContext(); 97 98 Object node = xpathContext; 99 100 if (select != null) { 101 node = select.selectSingleNode(xpathContext); 102 } 103 104 if ( node instanceof Element ) { 105 Element element = (Element) node; 106 107 SAXWriter saxWriter = new SAXWriter(output, output); 108 109 saxWriter.writeOpen(element); 110 invokeBody(output); 111 saxWriter.writeClose(element); 112 } 113 else { 114 invokeBody(output); 115 } 116 } 117 118 // Properties 119 //------------------------------------------------------------------------- 120 /*** Sets the XPath expression to evaluate. */ 121 public void setSelect(XPath select) { 122 this.select = select; 123 } 124 }

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