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

Comparing experimental/server/XMLReader/XMLPacketMaker.java (file contents):
Revision 1.5 by pjm2, Tue Nov 14 10:04:01 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 {
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	<
38	>	// Print out the entire contents of the packet's HashMap.
39	>	System.out.println("XMLPacket contents: -");
40	>	packet.printAll();
41
44	–	} catch (Throwable t) {
45	–	t.printStackTrace ();
42		}
43	<	System.exit (0);
44	<	}
45	<
46	<	static private Writer out;
51	<	private String indentString = "    "; // Amount to indent
52	<	private int indentLevel = 0;
53	<
54	<	// For storing the tag heirarchy.
55	<	private ArrayList tagList = new ArrayList();
56	<	static private XMLPacket packet = null;
57	<
58	<	//===========================================================
59	<	// SAX DocumentHandler methods
60	<	//===========================================================
61	<
62	<	public void startDocument () throws SAXException {
63	<	nl();
64	<	nl();
65	<	emit ("START DOCUMENT");
66	<	nl();
67	<	emit ("<?xml version='1.0' encoding='UTF-8'?>");
68	<	}
69	<
70	<	public void endDocument () throws SAXException {
71	<	nl(); emit ("END DOCUMENT");
72	<	try {
73	<	nl();
74	<	out.flush ();
75	<	} catch (IOException e) {
76	<	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	<	public void startElement (String name, AttributeList attrs) throws SAXException {
81	<	indentLevel++;
82	<	tagList.add(name);
83	<	nl(); emit ("ELEMENT: ");
84	<	emit ("<"+name);
85	<	if (attrs != null) {
86	<	for (int i = 0; i < attrs.getLength (); i++) {
87	<	nl();
88	<	emit("   ATTR: ");
89	<	emit (attrs.getName (i));
90	<	emit ("\t\"");
91	<	emit (attrs.getValue (i));
92	<	emit ("\"");
93	<	}
94	<	}
95	<	if (attrs.getLength() > 0) nl();
96	<	emit (">");
97	<	}
98	<
99	<	public void endElement (String name) throws SAXException {
100	<	nl();
101	<	emit ("END_ELM: ");
102	<	emit ("</"+name+">");
103	<	tagList.remove(tagList.size()-1);
104	<	indentLevel--;
105	<	}
106	<
107	<	public void characters (char[] buf, int offset, int len) throws SAXException {
108	<	nl(); emit ("CHARS:   ");
109	<	String s = new String(buf, offset, len);
110	<	if (!s.trim().equals("")) {
111	<	emit (s);
112	<	packet.addParam((String)tagList.get(tagList.size()-1), s);
113	<	}
114	<	}
115	<
116	<	//===========================================================
117	<	// Helpers ...
118	<	//===========================================================
119	<
120	<	// Wrap I/O exceptions in SAX exceptions, to
121	<	// suit handler signature requirements
122	<	private void emit (String s) throws SAXException {
123	<	try {
124	<	out.write (s);
125	<	out.flush ();
126	<	} catch (IOException e) {
127	<	throw new SAXException ("I/O error", e);
128	<	}
129	<	}
130	<
131	<	// Start a new line
132	<	// and indent the next line appropriately
133	<	private void nl () throws SAXException {
134	<	String lineEnd =  System.getProperty("line.separator");
135	<	try {
136	<	out.write (lineEnd);
137	<	for (int i=0; i < indentLevel; i++) out.write(indentString);
138	<	} catch (IOException e) {
139	<	throw new SAXException ("I/O error", e);
140	<	}
141	<	}
51	>
52	>	String xml;
53		}

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