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

Comparing experimental/server/XMLReader/XMLPacketMaker.java (file contents):
Revision 1.2 by pjm2, Tue Nov 14 09:18:20 2000 UTC vs.
Revision 1.9 by pjm2, Tue Nov 14 12:36:11 2000 UTC

#	Line 1 | Line 1
1	<	import java.io.*;
2	<
3	<	import org.xml.sax.*;
4	<
5	<	import javax.xml.parsers.SAXParserFactory;
6	<	import javax.xml.parsers.ParserConfigurationException;
7	<	import javax.xml.parsers.SAXParser;
8	<
9	<
10	<	public class XMLPacketMaker extends HandlerBase
11	<	{
12	<	public static void main (String argv [])
13	<	{
14	<	if (argv.length != 1) {
15	<	System.err.println ("Usage: cmd filename.xml");
16	<	System.exit (1);
17	<	}
18	<
19	<	// Use the default (non-validating) parser
20	<	SAXParserFactory factory = SAXParserFactory.newInstance();
21	<	try {
22	<	// Set up output stream
23	<	out = new OutputStreamWriter (System.out, "UTF8");
24	<
25	<	// Parse the input
26	<	SAXParser saxParser = factory.newSAXParser();
27	<	saxParser.parse( new File(argv [0]), new XMLPacketMaker() );
28	<
29	<	} catch (Throwable t) {
30	<	t.printStackTrace ();
31	<	}
32	<	System.exit (0);
33	<	}
34	<
35	<	static private Writer  out;
36	<	private String indentString = "    "; // Amount to indent
37	<	private int indentLevel = 0;
38	<
39	<
40	<	//===========================================================
41	<	// SAX DocumentHandler methods
42	<	//===========================================================
43	<
44	<	public void startDocument ()
45	<	throws SAXException
46	<	{
47	<	nl();
48	<	//nl();
49	<	emit ("START DOCUMENT");
50	<	nl();
51	<	//emit ("<?xml version='1.0' encoding='UTF-8'?>");
52	<	}
53	<
54	<	public void endDocument ()
55	<	throws SAXException
56	<	{
57	<	nl(); emit ("END DOCUMENT");
58	<	try {
59	<	nl();
60	<	out.flush ();
61	<	} catch (IOException e) {
62	<	throw new SAXException ("I/O error", e);
63	<	}
64	<	}
65	<
66	<	public void startElement (String name, AttributeList attrs)
67	<	throws SAXException
68	<	{
69	<	indentLevel++;
70	<	//nl(); emit ("ELEMENT: ");
71	<	//emit ("<"+name);
72	<	if (attrs != null) {
73	<	for (int i = 0; i < attrs.getLength (); i++) {
74	<	nl();
75	<	emit("   ATTR: ");
76	<	emit (attrs.getName (i));
77	<	emit ("\t\"");
78	<	emit (attrs.getValue (i));
79	<	emit ("\"");
80	<	}
81	<	}
82	<	//if (attrs.getLength() > 0) nl();
83	<	//emit (">");
84	<	}
85	<
86	<	public void endElement (String name)
87	<	throws SAXException
88	<	{
89	<	//nl();
90	<	//emit ("END_ELM: ");
91	<	//emit ("</"+name+">");
92	<	indentLevel--;
93	<	}
94	<
95	<	public void characters (char buf [], int offset, int len) throws SAXException {
96	<	nl(); emit ("Value:   ");
97	<	String s = new String(buf, offset, len);
98	<	if (!s.trim().equals("")) emit (s);
99	<	}
100	<
101	<	//===========================================================
102	<	// Helpers ...
103	<	//===========================================================
104	<
105	<	// Wrap I/O exceptions in SAX exceptions, to
106	<	// suit handler signature requirements
107	<	private void emit (String s) throws SAXException {
108	<	try {
109	<	out.write (s);
110	<	out.flush ();
111	<	} catch (IOException e) {
112	<	throw new SAXException ("I/O error", e);
113	<	}
114	<	}
115	<
116	<	// Start a new line
117	<	// and indent the next line appropriately
118	<	private void nl () throws SAXException {
119	<	String lineEnd =  System.getProperty("line.separator");
120	<	try {
121	<	out.write (lineEnd);
122	<	for (int i=0; i < indentLevel; i++) out.write(indentString);
123	<	} catch (IOException e) {
124	<	throw new SAXException ("I/O error", e);
125	<	}
126	<	}
127	<	}
1	>	import java.io.*;
2	>	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;
9	>
10	>	// Paul Mutton, pjm2@ukc.ac.uk
11	>
12	>	// XMLPacketMaker - Creates an XMLPacket object.
13	>	public class XMLPacketMaker extends HandlerBase {
14	>
15	>	public XMLPacketMaker () {
16	>	// default no-args constructor.
17	>	}
18	>
19	>	// Constructor for accepting a reference to an XMLPacket
20	>	public XMLPacketMaker (XMLPacket packet) {
21	>	this.packet = packet;
22	>	}
23	>
24	>	public static void main(String[] args){
25	>	if (args.length != 1) {
26	>	System.err.println ("Usage: cmd filename");
27	>	System.exit (1);
28	>	}
29	>
30	>	// Use the default (non-validating) parser
31	>	SAXParserFactory factory = SAXParserFactory.newInstance();
32	>	try {
33	>	// Set up output stream
34	>	out = new OutputStreamWriter (System.out, "UTF8");
35	>
36	>	// Create the XMLPacket to store values in.
37	>	packet = new XMLPacket();
38	>
39	>	// Parse the input
40	>	SAXParser saxParser = factory.newSAXParser();
41	>	saxParser.parse(new File(args[0]), new XMLPacketMaker(packet));
42	>
43	>	// Print out the entire contents of the packet's HashMap.
44	>	System.out.println("XMLPacket contents: -");
45	>	packet.printAll();
46	>
47	>	} catch (Throwable t) {
48	>	System.out.println("The recieved packet did not contain valid XML, so I'm gonna reject it.");
49	>	//t.printStackTrace ();
50	>	}
51	>	System.exit (0);
52	>	}
53	>
54	>	static private Writer out;
55	>	private String indentString = "    "; // Amount to indent
56	>	private int indentLevel = 0;
57	>
58	>	// For storing the tag heirarchy.
59	>	private ArrayList tagList = new ArrayList();
60	>	static private XMLPacket packet = null;
61	>
62	>	//===========================================================
63	>	// SAX DocumentHandler methods
64	>	//===========================================================
65	>
66	>	public void startDocument () throws SAXException {
67	>	// No purpose currently.
68	>	}
69	>
70	>	public void endDocument () throws SAXException {
71	>	// No purpose currently.
72	>	}
73	>
74	>	// Add each tag's attribute to the XMLPacket.
75	>	// Note that all attributes within an opening tag are
76	>	// stored as "someroot.sometag.attributes.attribute_name"
77	>	// E.g. If <packet> is the root node, then:
78	>	//     <packet machine_name="raptor">
79	>	// is stored as:
80	>	//     "packet.attributes.machine_name"
81	>	// within the XMLPacket.
82	>	public void startElement (String name, AttributeList attrs) throws SAXException {
83	>	indentLevel++;
84	>	tagList.add(name);
85	>	if (attrs != null) {
86	>	for (int i = 0; i < attrs.getLength (); i++) {
87	>	packet.addParam(getPath()+".attributes."+attrs.getName(i), attrs.getValue(i));
88	>	}
89	>	}
90	>	}
91	>
92	>	// When an XML element is finished with, we must remove
93	>	// the tag name from the tagList and decrement the indent
94	>	// level.
95	>	public void endElement (String name) throws SAXException {
96	>	tagList.remove(tagList.size()-1);
97	>	indentLevel--;
98	>	}
99	>
100	>	// Any text falling within a pair of terminal tags must
101	>	// be added to the XMLPacket.  Trim leading and trailing
102	>	// spaces and do not bother to add if there is no data
103	>	// specified within the tags.
104	>	public void characters (char[] buf, int offset, int len) throws SAXException {
105	>	String s = new String(buf, offset, len);
106	>	if (!s.trim().equals("")) {
107	>	packet.addParam(getPath(), s);
108	>	}
109	>	}
110	>
111	>
112	>	//===========================================================
113	>	// Helpers ...
114	>	//===========================================================
115	>
116	>
117	>	// Return the heirarchical string to be used as a key value
118	>	// in the XMLPacket.
119	>	private String getPath () {
120	>	String path = (String)tagList.get(0);
121	>	if (tagList.size() > 0) {
122	>	for (int i = 1 ; i < tagList.size() ; i++) {
123	>	path = path + "." + (String)tagList.get(i);
124	>	}
125	>	}
126	>	return path;
127	>	}
128	>
129	>	}

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