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root/i-scream/experimental/server/XMLReader/XMLPacketMaker.java

Comparing experimental/server/XMLReader/XMLPacketMaker.java (file contents):
Revision 1.4 by pjm2, Tue Nov 14 09:48:06 2000 UTC vs.
Revision 1.11 by pjm2, Fri Nov 17 12:16:39 2000 UTC

#	Line 3 | Line 3 | import java.util.ArrayList;
3
4		import org.xml.sax.*;
5
6	<	import javax.xml.parsers.SAXParserFactory;
7	<	import javax.xml.parsers.ParserConfigurationException;
8	<	import javax.xml.parsers.SAXParser;
6	>	import javax.xml.parsers.SAXParserFactory;
7	>	import javax.xml.parsers.ParserConfigurationException;
8	>	import javax.xml.parsers.SAXParser;
9
10	+	// Paul Mutton, pjm2@ukc.ac.uk
11
12	+	// XMLPacketMaker - Creates an XMLPacket object.
13		public class XMLPacketMaker extends HandlerBase {
12	–	public static void main(String[] args){
13	–	if (args.length != 1) {
14	–	System.err.println ("Usage: cmd filename");
15	–	System.exit (1);
16	–	}
14
15	<	// Use the default (non-validating) parser
16	<	SAXParserFactory factory = SAXParserFactory.newInstance();
17	<	try {
18	<	// Set up output stream
22	<	out = new OutputStreamWriter (System.out, "UTF8");
15	>	// No-args constructor.  Generally not used.
16	>	public XMLPacketMaker () {
17	>	this.xml = "<packet></packet>";
18	>	}
19
20	<	// Parse the input
21	<	SAXParser saxParser = factory.newSAXParser();
22	<	saxParser.parse(new File(args[0]), new XMLPacketMaker());
27	<
28	<	} catch (Throwable t) {
29	<	t.printStackTrace ();
30	<	}
31	<	System.exit (0);
20	>	// Constructor for accepting XML input.
21	>	public XMLPacketMaker (String xml) {
22	>	this.xml = xml;
23		}
24
25	<	static private Writer out;
35	<	private String indentString = "    "; // Amount to indent
36	<	private int indentLevel = 0;
25	>	public XMLPacket createXMLPacket() {
26
27	<	// For storing the tag heirarchy.
28	<	private ArrayList tagList = new ArrayList();
27	>	// Create the XMLPacket to store values in.
28	>	XMLPacket packet = new XMLPacket();
29
30	<	//===========================================================
31	<	// SAX DocumentHandler methods
43	<	//===========================================================
44	<
45	<	public void startDocument () throws SAXException {
46	<	nl();
47	<	nl();
48	<	emit ("START DOCUMENT");
49	<	nl();
50	<	emit ("<?xml version='1.0' encoding='UTF-8'?>");
51	<	}
52	<
53	<	public void endDocument () throws SAXException {
54	<	nl(); emit ("END DOCUMENT");
30	>	// Use the default (non-validating) parser
31	>	SAXParserFactory factory = SAXParserFactory.newInstance();
32		try {
56	–	nl();
57	–	out.flush ();
58	–	} catch (IOException e) {
59	–	throw new SAXException ("I/O error", e);
60	–	}
61	–	}
33
34	<	public void startElement (String name, AttributeList attrs) throws SAXException {
35	<	indentLevel++;
36	<	nl(); emit ("ELEMENT: ");
66	<	emit ("<"+name);
67	<	if (attrs != null) {
68	<	for (int i = 0; i < attrs.getLength (); i++) {
69	<	nl();
70	<	emit("   ATTR: ");
71	<	emit (attrs.getName (i));
72	<	emit ("\t\"");
73	<	emit (attrs.getValue (i));
74	<	emit ("\"");
75	<	}
76	<	}
77	<	if (attrs.getLength() > 0) nl();
78	<	emit (">");
79	<	}
34	>	// Parse the input
35	>	SAXParser saxParser = factory.newSAXParser();
36	>	saxParser.parse(xml, new XMLPacketParser(packet));
37
38	<	public void endElement (String name) throws SAXException {
39	<	nl();
40	<	emit ("END_ELM: ");
84	<	emit ("</"+name+">");
85	<	indentLevel--;
86	<	}
38	>	// Print out the entire contents of the packet's HashMap.
39	>	System.out.println("XMLPacket contents: -");
40	>	packet.printAll();
41
88	–	public void characters (char[] buf, int offset, int len) throws SAXException {
89	–	nl(); emit ("CHARS:   ");
90	–	String s = new String(buf, offset, len);
91	–	if (!s.trim().equals("")) emit (s);
92	–	}
93	–
94	–	//===========================================================
95	–	// Helpers ...
96	–	//===========================================================
97	–
98	–	// Wrap I/O exceptions in SAX exceptions, to
99	–	// suit handler signature requirements
100	–	private void emit (String s) throws SAXException {
101	–	try {
102	–	out.write (s);
103	–	out.flush ();
104	–	} catch (IOException e) {
105	–	throw new SAXException ("I/O error", e);
42		}
43	<	}
44	<
45	<	// Start a new line
46	<	// and indent the next line appropriately
111	<	private void nl () throws SAXException {
112	<	String lineEnd =  System.getProperty("line.separator");
113	<	try {
114	<	out.write (lineEnd);
115	<	for (int i=0; i < indentLevel; i++) out.write(indentString);
116	<	} catch (IOException e) {
117	<	throw new SAXException ("I/O error", e);
43	>	catch (Exception e) {
44	>	System.out.println("XMLPacketMaker - I just received an XML packet that did not contain valid XML.");
45	>	System.out.println(e);
46	>	return null;
47		}
48	+
49	+	return packet;
50		}
51	+
52	+	String xml;
53		}

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