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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.MissingAttributeException; 69 import org.apache.commons.jelly.TagSupport; 70 import org.apache.commons.jelly.XMLOutput; 71 72 import org.dom4j.Node; 73 import org.dom4j.io.SAXWriter; 74 75 import org.jaxen.XPath; 76 77 /*** A tag which performs a copy-of operation like the XSLT tag 78 * 79 * @author James Strachan 80 */ 81 public class CopyOfTag extends XPathTagSupport { 82 83 /*** The XPath expression to evaluate. */ 84 private XPath select; 85 86 public CopyOfTag() { 87 } 88 89 // Tag interface 90 //------------------------------------------------------------------------- 91 public void doTag(XMLOutput output) throws Exception { 92 Object xpathContext = getXPathContext(); 93 94 if (select == null) { 95 throw new MissingAttributeException( "select" ); 96 } 97 98 SAXWriter saxWriter = new SAXWriter(output, output); 99 List nodes = select.selectNodes(xpathContext); 100 for (Iterator iter = nodes.iterator(); iter.hasNext(); ) { 101 Object object = iter.next(); 102 if ( object instanceof Node ) { 103 saxWriter.write( (Node) object ); 104 } 105 else if (object != null ) { 106 output.write( object.toString() ); 107 } 108 } 109 } 110 111 // Properties 112 //------------------------------------------------------------------------- 113 /*** Sets the XPath expression to evaluate. */ 114 public void setSelect(XPath select) { 115 this.select = select; 116 } 117 }

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