src/org/xml/sax/demo/CharacterStreamDemo.java

   1 package org.xml.sax.demo;
   2 // SAX demonstration for parsing from a UTF-16 character stream.
   3 // No warranty; no copyright -- use this as you will.
   4 // $Id: CharacterStreamDemo.java,v 1.3 1998/05/01 20:44:33 david Exp $
   5
   6 import org.xml.sax.Parser;
   7 import org.xml.sax.InputSource;
   8 import org.xml.sax.SAXException;
   9
  10 import org.xml.sax.helpers.ParserFactory;
  11
  12 import java.io.StringReader;
  13
  14
  15 /**
  16   * Demonstrate parsing from a UTF-16 character stream.
  17   *
  18   * <p>Usage: java -Dorg.xml.sax.parser=<var>CLASSNAME</var>
  19   * CharacterStreamDemo</p>
  20   *
  21   * <p>The SAX parser will read the document from a character
  22   * stream connected to an internal string.</p>
  23   *
  24   * <p>Note that the Java implementation of SAX represents a
  25   * character stream using a Reader.</p>
  26   *
  27   * @see DemoHandler
  28   * @see org.xml.org.xml.sax.parser
  29   * @see org.xml.sax.InputSource
  30   * @see org.xml.sax.helpers.ParserFactory
  31   * @see java.io.StringReader
  32   */
  33 public class CharacterStreamDemo {
  34
  35                                 // This is the document, in all its glory.
  36                                 // In a read-world application, this
  37                                 // could come from a database, a text
  38                                 // field, or just about anywhere.
  39   final static String doc = "<?xml version=\"1.0\"?>" +
  40                             "<doc>\n" +
  41                             "<title>Hello</title>\n" +
  42                             "<para>Hello, world!</para>\n" +
  43                             "</doc>\n";
  44
  45   /**
  46     * Main entry point for an application.
  47     */
  48   public static void main (String args[])
  49     throws Exception
  50   {
  51     DemoHandler handler;
  52     InputSource source;
  53     Parser parser;
  54     StringReader reader;
  55
  56                                 // First, check the command-line
  57                                 // arguments.
  58     if (args.length != 0) {
  59       System.err.println("Usage: java CharTest");
  60       System.exit(2);
  61     }
  62
  63                                 // Allocate a SAX Parser object, using
  64                                 // the class name provided in the
  65                                 // org.xml.sax.parser property (you could
  66                                 // also specify a classname here).
  67     parser = ParserFactory.makeParser();
  68
  69                                 // Allocate an event handler, and register
  70                                 // it with the SAX parser for all four
  71                                 // types of events (we could use a
  72                                 // separate object for each).
  73     handler = new DemoHandler();
  74     parser.setEntityResolver(handler);
  75     parser.setDTDHandler(handler);
  76     parser.setDocumentHandler(handler);
  77     parser.setErrorHandler(handler);
  78
  79                                 // Create a Java-specific StringReader
  80                                 // for the internal document.
  81     reader = new StringReader(doc);
  82
  83                                 // Parse the document from the
  84                                 // character stream.
  85     parser.parse(new InputSource(reader));
  86   }
  87
  88 }