1 /* 2 * Redistribution and use of this software and associated documentation ("Software"), with or 3 * without modification, are permitted provided that the following conditions are met: 4 * 5 * 1. Redistributions of source code must retain copyright statements and notices. Redistributions 6 * must also contain a copy of this document. 7 * 8 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of 9 * conditions and the following disclaimer in the documentation and/or other materials provided with 10 * the distribution. 11 * 12 * 3. The name "Exolab" must not be used to endorse or promote products derived from this Software 13 * without prior written permission of Intalio, Inc. For written permission, please contact 14 * info@exolab.org. 15 * 16 * 4. Products derived from this Software may not be called "Exolab" nor may "Exolab" appear in 17 * their names without prior written permission of Intalio, Inc. Exolab is a registered trademark of 18 * Intalio, Inc. 19 * 20 * 5. Due credit should be given to the Exolab Project (http://www.exolab.org/). 21 * 22 * THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESSED OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 24 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTALIO, INC. OR ITS 25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 28 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY 29 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 * Copyright 1999, 2000 (C) Intalio, Inc. All Rights Reserved. 32 * 33 * $Id$ 34 */ 35 package org.exolab.castor.xml.util; 36 37 import org.w3c.dom.Document; 38 import org.w3c.dom.Element; 39 import org.w3c.dom.Node; 40 import org.w3c.dom.ProcessingInstruction; 41 import org.w3c.dom.Text; 42 import org.xml.sax.AttributeList; 43 import org.xml.sax.HandlerBase; 44 import org.xml.sax.SAXException; 45 46 import java.util.Stack; 47 48 /** 49 * A class for converting a SAX events to DOM nodes. 50 * 51 * @author <a href="mailto:andrew.fawcett@coda.com">Andrew Fawcett</a> 52 */ 53 public class SAX2DOMHandler extends HandlerBase { 54 55 private final Node _node; 56 57 private final Stack<Element> _parents = new Stack<Element>(); 58 59 /** 60 * Creates new instance of {@link SAX2DOMHandler} class. 61 * 62 * @param node the DOM node to use 63 */ 64 public SAX2DOMHandler(Node node) { 65 _node = node; 66 } 67 68 @Override 69 public void startElement(final String name, final AttributeList attributes) { 70 Node parent = !_parents.isEmpty() ? _parents.peek() : _node; 71 final Document document = getDocument(parent); 72 73 Element element = document.createElement(name); 74 int length = attributes.getLength(); 75 for (int i = 0; i < length; i++) { 76 element.setAttribute(attributes.getName(i), attributes.getValue(i)); 77 } 78 parent.appendChild(element); 79 _parents.push(element); 80 } 81 82 @Override 83 public void characters(final char[] chars, final int offset, final int length) { 84 String data = new String(chars, offset, length); 85 Node parent = !_parents.isEmpty() ? _parents.peek() : _node; 86 Node last = parent.getLastChild(); 87 if ((last != null) && (last.getNodeType() == Node.TEXT_NODE)) { 88 ((Text) last).appendData(data); 89 } else { 90 Text text = parent.getOwnerDocument().createTextNode(data); 91 parent.appendChild(text); 92 } 93 } 94 95 @Override 96 public void endElement(final String name) { 97 _parents.pop(); 98 } 99 100 @Override 101 public void processingInstruction(String target, String data) throws SAXException { 102 // adds the given processing instruction to the document root 103 Document document = getDocument(_node); 104 ProcessingInstruction instruction = document.createProcessingInstruction(target, data); 105 document.insertBefore(instruction, document.getFirstChild()); 106 } 107 108 /** 109 * Returns the owning {@link Document} for the given {@link Node}. 110 * 111 * @param node A given node. 112 * @return the owning {@link Document} for the give node. 113 */ 114 private Document getDocument(Node node) { 115 Document document; 116 if (node instanceof Document) { 117 document = (Document) node; 118 } else { 119 document = node.getOwnerDocument(); 120 } 121 return document; 122 } 123 }