--- experimental/server/XMLReader/XMLPacketMaker.java 2000/11/14 09:32:31 1.3 +++ experimental/server/XMLReader/XMLPacketMaker.java 2000/11/17 12:16:39 1.11 @@ -3,117 +3,51 @@ import java.util.ArrayList; import org.xml.sax.*; -import javax.xml.parsers.SAXParserFactory; -import javax.xml.parsers.ParserConfigurationException; -import javax.xml.parsers.SAXParser; +import javax.xml.parsers.SAXParserFactory; +import javax.xml.parsers.ParserConfigurationException; +import javax.xml.parsers.SAXParser; +// Paul Mutton, pjm2@ukc.ac.uk +// XMLPacketMaker - Creates an XMLPacket object. public class XMLPacketMaker extends HandlerBase { - public static void main(String[] args){ - if (args.length != 1) { - System.err.println ("Usage: cmd filename"); - System.exit (1); - } - // Use the default (non-validating) parser - SAXParserFactory factory = SAXParserFactory.newInstance(); - try { - // Set up output stream - out = new OutputStreamWriter (System.out, "UTF8"); + // No-args constructor. Generally not used. + public XMLPacketMaker () { + this.xml = ""; + } - // Parse the input - SAXParser saxParser = factory.newSAXParser(); - saxParser.parse(new File(args[0]), new XMLPacketMaker()); - - } catch (Throwable t) { - t.printStackTrace (); - } - System.exit (0); + // Constructor for accepting XML input. + public XMLPacketMaker (String xml) { + this.xml = xml; } - static private Writer out; - private String indentString = " "; // Amount to indent - private int indentLevel = 0; + public XMLPacket createXMLPacket() { - private ArrayList tagList = new ArrayList(); + // Create the XMLPacket to store values in. + XMLPacket packet = new XMLPacket(); - //=========================================================== - // SAX DocumentHandler methods - //=========================================================== - - public void startDocument () throws SAXException { - nl(); - nl(); - emit ("START DOCUMENT"); - nl(); - emit (""); - } - - public void endDocument () throws SAXException { - nl(); emit ("END DOCUMENT"); + // Use the default (non-validating) parser + SAXParserFactory factory = SAXParserFactory.newInstance(); try { - nl(); - out.flush (); - } catch (IOException e) { - throw new SAXException ("I/O error", e); - } - } - public void startElement (String name, AttributeList attrs) throws SAXException { - indentLevel++; - nl(); emit ("ELEMENT: "); - emit ("<"+name); - if (attrs != null) { - for (int i = 0; i < attrs.getLength (); i++) { - nl(); - emit(" ATTR: "); - emit (attrs.getName (i)); - emit ("\t\""); - emit (attrs.getValue (i)); - emit ("\""); - } - } - if (attrs.getLength() > 0) nl(); - emit (">"); - } + // Parse the input + SAXParser saxParser = factory.newSAXParser(); + saxParser.parse(xml, new XMLPacketParser(packet)); - public void endElement (String name) throws SAXException { - nl(); - emit ("END_ELM: "); - emit (""); - indentLevel--; - } + // Print out the entire contents of the packet's HashMap. + System.out.println("XMLPacket contents: -"); + packet.printAll(); - public void characters (char[] buf, int offset, int len) throws SAXException { - nl(); emit ("CHARS: "); - String s = new String(buf, offset, len); - if (!s.trim().equals("")) emit (s); - } - - //=========================================================== - // Helpers ... - //=========================================================== - - // Wrap I/O exceptions in SAX exceptions, to - // suit handler signature requirements - private void emit (String s) throws SAXException { - try { - out.write (s); - out.flush (); - } catch (IOException e) { - throw new SAXException ("I/O error", e); } - } - - // Start a new line - // and indent the next line appropriately - private void nl () throws SAXException { - String lineEnd = System.getProperty("line.separator"); - try { - out.write (lineEnd); - for (int i=0; i < indentLevel; i++) out.write(indentString); - } catch (IOException e) { - throw new SAXException ("I/O error", e); + catch (Exception e) { + System.out.println("XMLPacketMaker - I just received an XML packet that did not contain valid XML."); + System.out.println(e); + return null; } + + return packet; } + + String xml; } \ No newline at end of file