1 /* Copyright 2002-2004 Elliotte Rusty Harold 2 3 This library is free software; you can redistribute it and/or modify 4 it under the terms of version 2.1 of the GNU Lesser General Public 5 License as published by the Free Software Foundation. 6 7 This library is distributed in the hope that it will be useful, 8 but WITHOUT ANY WARRANTY; without even the implied warranty of 9 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 GNU Lesser General Public License for more details. 11 12 You should have received a copy of the GNU Lesser General Public 13 License along with this library; if not, write to the 14 Free Software Foundation, Inc., 59 Temple Place, Suite 330, 15 Boston, MA 02111-1307 USA 16 17 You can contact Elliotte Rusty Harold by sending e-mail to 18 elharo@ibiblio.org. Please include the word "XOM" in the 19 subject line. The XOM home page is located at http://www.xom.nu/ 20 */ 21 22 package nu.xom.samples; 23 24 import java.io.IOException; 25 26 import nu.xom.Builder; 27 import nu.xom.Element; 28 import nu.xom.Nodes; 29 import nu.xom.ParsingException; 30 31 /** 32 * <p> 33 * Print just the headlines from an RSS feed 34 * </p> 35 * 36 * @author Elliotte Rusty Harold 37 * @version 1.0 38 */ 39 public class RSSHeadlines extends MinimalNodeFactory { 40 41 private boolean inTitle = false; 42 private Nodes empty = new Nodes(); 43 startMakingElement(String name, String namespace)44 public Element startMakingElement(String name, String namespace) { 45 if ("title".equals(name) ) { 46 inTitle = true; 47 } 48 return new Element(name, namespace); 49 } 50 makeText(String data)51 public Nodes makeText(String data) { 52 if (inTitle) System.out.print(data); 53 return empty; 54 } 55 finishMakingElement(Element element)56 public Nodes finishMakingElement(Element element) { 57 if ("title".equals(element.getQualifiedName()) ) { 58 System.out.println(); 59 inTitle = false; 60 } 61 return new Nodes(element); 62 } 63 main(String[] args)64 public static void main(String[] args) { 65 66 String url = "http://www.bbc.co.uk/syndication/feeds/news/ukfs_news/world/rss091.xml"; 67 if (args.length > 0) { 68 url = args[0]; 69 } 70 71 try { 72 Builder parser = new Builder(new RSSHeadlines()); 73 parser.build(url); 74 } 75 catch (ParsingException ex) { 76 System.out.println(url + " is not well-formed."); 77 System.out.println(ex.getMessage()); 78 } 79 catch (IOException ex) { 80 System.out.println( 81 "Due to an IOException, the parser could not read " + url 82 ); 83 } 84 85 } 86 87 } 88