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

Comparing experimental/server/XMLReader/XMLPacketMaker.java (file contents):
Revision 1.6 by pjm2, Tue Nov 14 10:15:54 2000 UTC vs.
Revision 1.10 by pjm2, Fri Nov 17 11:07:32 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 {
14
15	+	// No-args constructor.  Generally not used.
16		public XMLPacketMaker () {
17	<	// default no-args constructor.
17	>	this.xml = "<packet></packet>";
18		}
19
20	<	// Constructor for accepting a reference to an XMLPacket
21	<	public XMLPacketMaker (XMLPacket packet) {
22	<	this.packet = packet;
20	>	// Constructor for accepting XML input.
21	>	public XMLPacketMaker (String xml) {
22	>	this.xml = xml;
23		}
24
25	<	public static void main(String[] args){
23	<	if (args.length != 1) {
24	<	System.err.println ("Usage: cmd filename");
25	<	System.exit (1);
26	<	}
25	>	public XMLPacket createXMLPacket() {
26
27	+	// Create the XMLPacket to store values in.
28	+	XMLPacket packet = new XMLPacket();
29	+
30		// Use the default (non-validating) parser
31		SAXParserFactory factory = SAXParserFactory.newInstance();
32		try {
31	–	// Set up output stream
32	–	out = new OutputStreamWriter (System.out, "UTF8");
33
34	–	// Create the XMLPacket to store values in.
35	–	packet = new XMLPacket();
36	–
34		// Parse the input
35		SAXParser saxParser = factory.newSAXParser();
36	<	saxParser.parse(new File(args[0]), new XMLPacketMaker(packet));
36	>	saxParser.parse(xml, new XMLPacketParser(packet));
37
38	<	// Print out some things from the packet: -
39	<	System.out.println("bung.wibble="+packet.getParam("bung.wibble"));
40	<	System.out.println("bung.ping.value1="+packet.getParam("bung.ping.value1"));
44	<
38	>	// Print out the entire contents of the packet's HashMap.
39	>	System.out.println("XMLPacket contents: -");
40	>	packet.printAll();
41
46	–	} catch (Throwable t) {
47	–	t.printStackTrace ();
42		}
43	<	System.exit (0);
44	<	}
45	<
52	<	static private Writer out;
53	<	private String indentString = "    "; // Amount to indent
54	<	private int indentLevel = 0;
55	<
56	<	// For storing the tag heirarchy.
57	<	private ArrayList tagList = new ArrayList();
58	<	static private XMLPacket packet = null;
59	<
60	<	//===========================================================
61	<	// SAX DocumentHandler methods
62	<	//===========================================================
63	<
64	<	public void startDocument () throws SAXException {
65	<	nl();
66	<	nl();
67	<	emit ("START DOCUMENT");
68	<	nl();
69	<	emit ("<?xml version='1.0' encoding='UTF-8'?>");
70	<	}
71	<
72	<	public void endDocument () throws SAXException {
73	<	nl(); emit ("END DOCUMENT");
74	<	try {
75	<	nl();
76	<	out.flush ();
77	<	} catch (IOException e) {
78	<	throw new SAXException ("I/O error", e);
43	>	catch (Throwable t) {
44	>	System.out.println("The recieved packet did not contain valid XML, so I'm gonna reject it.");
45	>	//t.printStackTrace ();
46		}
47	+
48	+	return packet;
49		}
81	–
82	–	public void startElement (String name, AttributeList attrs) throws SAXException {
83	–	indentLevel++;
84	–	tagList.add(name);
85	–	nl(); emit ("ELEMENT: ");
86	–	emit ("<"+name);
87	–	if (attrs != null) {
88	–	for (int i = 0; i < attrs.getLength (); i++) {
89	–	nl();
90	–	emit("   ATTR: ");
91	–	emit (attrs.getName (i));
92	–	emit ("\t\"");
93	–	emit (attrs.getValue (i));
94	–	emit ("\"");
95	–	}
96	–	}
97	–	if (attrs.getLength() > 0) nl();
98	–	emit (">");
99	–	}
100	–
101	–	public void endElement (String name) throws SAXException {
102	–	nl();
103	–	emit ("END_ELM: ");
104	–	emit ("</"+name+">");
105	–	tagList.remove(tagList.size()-1);
106	–	indentLevel--;
107	–	}
108	–
109	–	public void characters (char[] buf, int offset, int len) throws SAXException {
110	–	nl(); emit ("CHARS:   ");
111	–	String s = new String(buf, offset, len);
112	–	if (!s.trim().equals("")) {
113	–	emit (s);
114	–	packet.addParam(getPath(), s);
115	–	}
116	–	}
117	–
118	–	//===========================================================
119	–	// Helpers ...
120	–	//===========================================================
121	–
122	–	// Wrap I/O exceptions in SAX exceptions, to
123	–	// suit handler signature requirements
124	–	private void emit (String s) throws SAXException {
125	–	try {
126	–	out.write (s);
127	–	out.flush ();
128	–	} catch (IOException e) {
129	–	throw new SAXException ("I/O error", e);
130	–	}
131	–	}
132	–
133	–	// Start a new line
134	–	// and indent the next line appropriately
135	–	private void nl () throws SAXException {
136	–	String lineEnd =  System.getProperty("line.separator");
137	–	try {
138	–	out.write (lineEnd);
139	–	for (int i=0; i < indentLevel; i++) out.write(indentString);
140	–	} catch (IOException e) {
141	–	throw new SAXException ("I/O error", e);
142	–	}
143	–	}
50
51	<	private String getPath () {
146	<	String path = (String)tagList.get(0);
147	<	if (tagList.size() > 0) {
148	<	for (int i = 1 ; i < tagList.size() ; i++) {
149	<	path = path + "." + (String)tagList.get(i);
150	<	}
151	<	}
152	<	return path;
153	<	}
51	>	String xml;
52		}

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