| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2001 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xerces" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally developed by Christian Geuer-Pollmann. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| package dom.treewalker; |
| import java.io.*; |
| import javax.xml.parsers.*; |
| import org.w3c.dom.*; |
| import org.w3c.dom.traversal.*; |
| import org.xml.sax.*; |
| |
| |
| /** |
| * The class tests TreeWalkerImpl.firstChild() and TreeWalkerImpl.nextSibling(); |
| * The class generates simple XML document and traverses it. |
| * |
| * @author Christian Geuer-Pollmann <geuer-pollmann@nue.et-inf.uni-siegen.de> |
| * @version $Id$ |
| */ |
| public class TestFirstChild { |
| |
| public static void main(String args[]) throws Exception { |
| |
| |
| System.out.println(" --- " |
| + org.apache.xerces.impl.Version.fVersion |
| + " --- "); |
| Document doc = getNodeSet1(); |
| NodeFilter nodefilter = null; |
| boolean entityReferenceExpansion = true; |
| int whatToShow = NodeFilter.SHOW_ALL; |
| TreeWalker treewalker = |
| ((DocumentTraversal) doc).createTreeWalker(doc, whatToShow, |
| nodefilter, entityReferenceExpansion); |
| ByteArrayOutputStream bytearrayoutputstream = |
| new ByteArrayOutputStream(); |
| PrintWriter printwriter = |
| new PrintWriter(new OutputStreamWriter(bytearrayoutputstream, |
| "UTF8")); |
| |
| process2(treewalker, printwriter); |
| printwriter.flush(); |
| |
| System.out.println(); |
| System.out.println("Testing the following XML document:\n" + new String(bytearrayoutputstream.toByteArray())); |
| } |
| |
| /** |
| * Method getNodeSet1 |
| * |
| * @return |
| * @throws ParserConfigurationException |
| */ |
| private static Document getNodeSet1() |
| throws ParserConfigurationException { |
| |
| DocumentBuilderFactory dfactory = |
| DocumentBuilderFactory.newInstance(); |
| |
| dfactory.setValidating(false); |
| dfactory.setNamespaceAware(true); |
| |
| DocumentBuilder db = dfactory.newDocumentBuilder(); |
| Document doc = db.newDocument(); |
| Element root = doc.createElement("RootElement"); |
| Element e1 = doc.createElement("Element1"); |
| Element e2 = doc.createElement("Element2"); |
| Element e3 = doc.createElement("Element3"); |
| Text e3t = doc.createTextNode("Text in Element3"); |
| |
| e3.appendChild(e3t); |
| root.appendChild(e1); |
| root.appendChild(e2); |
| root.appendChild(e3); |
| doc.appendChild(root); |
| |
| String s1 ="<RootElement><Element1/><Element2/><Element3>Text in Element3</Element3></RootElement>"; |
| |
| return doc; |
| } |
| |
| /** |
| * recursively traverses the tree |
| * |
| * for simplicity, I don't handle comments, Attributes, PIs etc. |
| * Only Text, Document and Element |
| * |
| * @param treewalker |
| * @param printwriter |
| */ |
| private static void process2(TreeWalker treewalker, |
| PrintWriter printwriter) { |
| |
| Node currentNode = treewalker.getCurrentNode(); |
| |
| switch (currentNode.getNodeType()) { |
| |
| case Node.TEXT_NODE : |
| case Node.CDATA_SECTION_NODE : |
| printwriter.print(currentNode.getNodeValue()); |
| break; |
| |
| case Node.ENTITY_REFERENCE_NODE : |
| case Node.DOCUMENT_NODE : |
| case Node.ELEMENT_NODE : |
| default : |
| if (currentNode.getNodeType() == Node.ELEMENT_NODE) { |
| printwriter.print('<'); |
| printwriter.print(currentNode.getNodeName()); |
| printwriter.print(">"); |
| } |
| |
| Node node1 = treewalker.firstChild(); |
| |
| if (node1 == null) { |
| System.out.println(getNodeTypeString(currentNode.getNodeType()) |
| + "_NODE parent: " |
| + currentNode.getNodeName() |
| + " has no children "); |
| } |
| else { |
| System.out.println(getNodeTypeString(currentNode.getNodeType()) |
| + "_NODE parent: " |
| + currentNode.getNodeName() |
| + " has children "); |
| |
| while (node1 != null) { |
| { |
| String qStr = ""; |
| |
| for (Node q = node1; q != null; q = q.getParentNode()) { |
| qStr = q.getNodeName() + "/" + qStr; |
| } |
| |
| System.out.println(getNodeTypeString(currentNode.getNodeType()) |
| + "_NODE process child " + qStr); |
| } |
| |
| |
| // recursion !!! |
| process2(treewalker, printwriter); |
| |
| node1 = treewalker.nextSibling(); |
| if (node1 != null) { |
| System.out.println("treewalker.nextSibling() = " |
| + node1.getNodeName()); |
| } |
| } // while(node1 != null) |
| } |
| |
| System.out.println("setCurrentNode() back to " |
| + currentNode.getNodeName()); |
| treewalker.setCurrentNode(currentNode); |
| |
| if (currentNode.getNodeType() == Node.ELEMENT_NODE) { |
| printwriter.print("</"); |
| printwriter.print(currentNode.getNodeName()); |
| printwriter.print(">"); |
| } |
| |
| break; |
| } |
| } |
| |
| /** Field nodeTypeString */ |
| private static String[] nodeTypeString = new String[]{ "", "ELEMENT", |
| "ATTRIBUTE", |
| "TEXT_NODE", |
| "CDATA_SECTION", |
| "ENTITY_REFERENCE", |
| "ENTITY", |
| "PROCESSING_INSTRUCTION", |
| "COMMENT", |
| "DOCUMENT", |
| "DOCUMENT_TYPE", |
| "DOCUMENT_FRAGMENT", |
| "NOTATION"}; |
| |
| |
| |
| /** |
| * |
| * Transforms <code>org.w3c.dom.Node.XXX_NODE</code> NodeType values into |
| * XXX Strings. |
| * |
| * @param nodeType as taken from the {@link org.w3c.dom.Node#getNodeType} |
| * function |
| * @return the String value. |
| * @see org.w3c.dom.Node#getNodeType |
| * @param nodeType |
| * @return |
| */ |
| public static String getNodeTypeString(short nodeType) { |
| |
| if ((nodeType > 0) && (nodeType < 13)) { |
| return nodeTypeString[nodeType]; |
| } |
| else { |
| return ""; |
| } |
| } |
| |
| } |
