libjava/classpath/examples/gnu/classpath/examples/html/Demo.java

   1 /* Demo.java --
   2    Copyright (C) 2005 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38 package gnu.classpath.examples.html;
  39
  40 import gnu.javax.swing.text.html.parser.HTML_401F;
  41
  42 import gnu.xml.dom.html2.DomHTMLParser;
  43
  44 import java.io.IOException;
  45 import java.io.PrintStream;
  46 import java.io.StringReader;
  47
  48 import org.w3c.dom.NamedNodeMap;
  49 import org.w3c.dom.Node;
  50 import org.w3c.dom.NodeList;
  51 import org.w3c.dom.html2.HTMLDocument;
  52
  53 /**
  54  * This example demonstrates how to parse HTML input into
  55  * org.w3c.dom.html2 document model.
  56  * @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
  57  */
  58 public class Demo
  59 {
  60   /**
  61    * The sample HTML to parse.
  62    */
  63   static String input = "<!--2-->a<b iD=1>x</b>y<b><i>c</b>d</i>e";
  64
  65   public static void main(String[] args)
  66   {
  67     try
  68       {
  69         // Create a parser, using our DTD.
  70         DomHTMLParser p = new DomHTMLParser(HTML_401F.getInstance());
  71         HTMLDocument d = p.parseDocument(new StringReader(input));
  72
  73         // Print the input HTML.
  74         System.out.println(input);
  75
  76         // Print the parsed data structure.
  77         print(System.out, d, 0);
  78       }
  79     catch (IOException ex)
  80       {
  81         ex.printStackTrace();
  82       }
  83   }
  84
  85   /**
  86    * Print the parsed data structure.
  87    *
  88    * @param stream the output
  89    * @param node the node
  90    * @param ident the identation
  91    */
  92   static void print(PrintStream stream, Node node, int ident)
  93   {
  94     if (node == null)
  95       return;
  96
  97     StringBuilder tab = new StringBuilder();
  98     stream.println();
  99     for (int i = 0; i < ident; i++)
 100       {
 101         tab.append(' ');
 102       }
 103
 104     stream.print(tab + node.getNodeName());
 105     if (node.getNodeValue() != null)
 106       {
 107         stream.println();
 108         stream.print(tab + " '" + node.getNodeValue() + "'");
 109       }
 110
 111     NamedNodeMap attributes = node.getAttributes();
 112     if (attributes != null && attributes.getLength() != 0)
 113       {
 114         stream.print(' ');
 115         for (int i = 0; i < attributes.getLength(); i++)
 116           {
 117             Node a = attributes.item(i);
 118             stream.print(a.getNodeName() + "='" + a.getNodeValue() + "'");
 119           }
 120       }
 121
 122     ident += 2;
 123
 124     NodeList childs = node.getChildNodes();
 125     if (childs != null)
 126       for (int i = 0; i < childs.getLength(); i++)
 127         {
 128           print(stream, childs.item(i), ident);
 129         }
 130   }
 131 }