| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999 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 "Xalan" 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 based on software copyright (c) 1999, Lotus |
| * Development Corporation., http://www.lotus.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| // This file uses 4 space indents, no tabs. |
| |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.util.Properties; |
| import org.apache.xerces.parsers.DOMParser; |
| import org.apache.xpath.XPathAPI; |
| import org.apache.xml.utils.TreeWalker; |
| import org.apache.xml.utils.DOMBuilder; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.DocumentFragment; |
| import org.w3c.dom.Node; |
| import org.w3c.dom.NodeList; |
| import org.w3c.dom.traversal.NodeIterator; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.InputSource; |
| |
| // Imported JAVA API for XML Parsing 1.0 classes |
| import javax.xml.parsers.DocumentBuilder; |
| import javax.xml.parsers.DocumentBuilderFactory; |
| import javax.xml.parsers.ParserConfigurationException; |
| |
| // Imported Serializer classes |
| import javax.xml.transform.*; |
| import javax.xml.transform.stream.*; |
| import javax.xml.transform.dom.*; |
| |
| /** |
| * Very basic utility for applying an XPath epxression to an xml file and printing information |
| / about the execution of the XPath object and the nodes it finds. |
| * Takes 2 arguments: |
| * (1) an xml filename |
| * (2) an XPath expression to apply to the file |
| * Examples: |
| * java ApplyXPath foo.xml / |
| * java ApplyXPath foo.xml /doc/name[1]/@last |
| * @see XPathAPI |
| */ |
| public class ApplyXPath |
| { |
| protected String filename = null; |
| protected String xpath = null; |
| |
| /** Process input args and execute the XPath. */ |
| public void doMain(String[] args) |
| throws Exception |
| { |
| filename = args[0]; |
| xpath = args[1]; |
| |
| if ((filename != null) && (filename.length() > 0) |
| && (xpath != null) && (xpath.length() > 0)) |
| { |
| // Tell that we're loading classes and parsing, so the time it |
| // takes to do this doesn't get confused with the time to do |
| // the actual query and serialization. |
| System.out.println("Loading classes, parsing "+filename+", and setting up serializer"); |
| |
| // Set up a DOM tree to query. |
| InputSource in = new InputSource(new FileInputStream(filename)); |
| DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance(); |
| dfactory.setNamespaceAware(true); |
| Document doc = dfactory.newDocumentBuilder().parse(in); |
| |
| // Set up an identity transformer to use as serializer. |
| Transformer serializer = TransformerFactory.newInstance().newTransformer(); |
| serializer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); |
| |
| // Use the simple XPath API to select a nodeIterator. |
| System.out.println("Querying DOM using "+xpath); |
| NodeIterator nl = XPathAPI.selectNodeIterator(doc, xpath); |
| |
| // Serialize the found nodes to System.out. |
| System.out.println("<output>"); |
| |
| Node n; |
| while ((n = nl.nextNode())!= null) |
| { |
| if (isTextNode(n)) { |
| // DOM may have more than one node corresponding to a |
| // single XPath text node. Coalesce all contiguous text nodes |
| // at this level |
| StringBuffer sb = new StringBuffer(n.getNodeValue()); |
| for ( |
| Node nn = n.getNextSibling(); |
| isTextNode(nn); |
| nn = nn.getNextSibling() |
| ) { |
| sb.append(nn.getNodeValue()); |
| } |
| System.out.print(sb); |
| } |
| else { |
| serializer.transform(new DOMSource(n), new StreamResult(System.out)); |
| } |
| System.out.println(); |
| } |
| System.out.println("</output>"); |
| } |
| else |
| { |
| System.out.println("Bad input args: " + filename + ", " + xpath); |
| } |
| } |
| |
| /** Decide if the node is text, and so must be handled specially */ |
| static boolean isTextNode(Node n) { |
| if (n == null) |
| return false; |
| short nodeType = n.getNodeType(); |
| return nodeType == Node.CDATA_SECTION_NODE || nodeType == Node.TEXT_NODE; |
| } |
| |
| /** Main method to run from the command line. */ |
| public static void main (String[] args) |
| throws Exception |
| { |
| if (args.length != 2) |
| { |
| System.out.println("java ApplyXPath filename.xml xpath\n" |
| + "Reads filename.xml and applies the xpath; prints the nodelist found."); |
| return; |
| } |
| |
| ApplyXPath app = new ApplyXPath(); |
| app.doMain(args); |
| } |
| |
| } // end of class ApplyXPath |
| |