server/XMLReader/XMLPacketMaker.java

import java.io.*;
import java.util.ArrayList;

import org.xml.sax.*;

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 {

    // No-args constructor.  Generally not used.
    public XMLPacketMaker () {
        this.xml = "<packet></packet>";
    }

    // Constructor for accepting XML input.
    public XMLPacketMaker (String xml) {
        this.xml = xml;
    }

    public XMLPacket createXMLPacket() {

        // Create the XMLPacket to store values in.
        XMLPacket packet = new XMLPacket();

        // Use the default (non-validating) parser
        SAXParserFactory factory = SAXParserFactory.newInstance();
        try {

            // Parse the input
            SAXParser saxParser = factory.newSAXParser();
            saxParser.parse(xml, new XMLPacketParser(packet));

            // Print out the entire contents of the packet's HashMap.
            System.out.println("XMLPacket contents: -");
            packet.printAll();

        }
        catch (Throwable t) {
            System.out.println("The recieved packet did not contain valid XML, so I'm gonna reject it.");
            //t.printStackTrace ();
        }
        
        return packet;
    }
    
    String xml;
}
Revision:	1.10
Committed:	Fri Nov 17 11:07:32 2000 UTC (23 years, 5 months ago) by pjm2
Branch:	MAIN
Changes since 1.9:	+15 -92 lines
Log Message:	Added a new class - XMLPacketParser.java This new class looks after the SAX parsing methods which are used to create our XMLPacket contents. The XMLPacketMaker class has also been altered to make use of the XMLPacketParser class. The XMLPacketMaker class now accepts a String argument in its constructor. It uses the XMLPacketParser to populate the XMLPacket, for which the XMLPacketMaker provides an accessor.
#	User	Rev	Content
1	pjm2	1.3	import java.io.*;
2			import java.util.ArrayList;
3
4			import org.xml.sax.*;
5
6	pjm2	1.7	import javax.xml.parsers.SAXParserFactory;
7			import javax.xml.parsers.ParserConfigurationException;
8			import javax.xml.parsers.SAXParser;
9	pjm2	1.3
10	pjm2	1.7	// Paul Mutton, pjm2@ukc.ac.uk
11	pjm2	1.3
12	pjm2	1.7	// XMLPacketMaker - Creates an XMLPacket object.
13	pjm2	1.3	public class XMLPacketMaker extends HandlerBase {
14	pjm2	1.5
15	pjm2	1.10	// No-args constructor. Generally not used.
16	pjm2	1.5	public XMLPacketMaker () {
17	pjm2	1.10	this.xml = "<packet></packet>";
18	pjm2	1.5	}
19
20	pjm2	1.10	// Constructor for accepting XML input.
21			public XMLPacketMaker (String xml) {
22			this.xml = xml;
23	pjm2	1.5	}
24
25	pjm2	1.10	public XMLPacket createXMLPacket() {
26
27			// Create the XMLPacket to store values in.
28			XMLPacket packet = new XMLPacket();
29	pjm2	1.3
30			// Use the default (non-validating) parser
31			SAXParserFactory factory = SAXParserFactory.newInstance();
32			try {
33	pjm2	1.5
34	pjm2	1.3	// Parse the input
35			SAXParser saxParser = factory.newSAXParser();
36	pjm2	1.10	saxParser.parse(xml, new XMLPacketParser(packet));
37	pjm2	1.5
38	pjm2	1.8	// Print out the entire contents of the packet's HashMap.
39			System.out.println("XMLPacket contents: -");
40	pjm2	1.7	packet.printAll();
41	pjm2	1.3
42	pjm2	1.10	}
43			catch (Throwable t) {
44	pjm2	1.9	System.out.println("The recieved packet did not contain valid XML, so I'm gonna reject it.");
45			//t.printStackTrace ();
46	pjm2	1.3	}
47	pjm2	1.10
48			return packet;
49	pjm2	1.3	}
50	pjm2	1.8
51	pjm2	1.10	String xml;
52	pjm2	1.3	}