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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.filter; |
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|
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//---IMPORTS--- |
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import java.io.*; |
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import java.net.*; |
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import java.util.*; |
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import uk.ac.ukc.iscream.core.*; |
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import uk.ac.ukc.iscream.filter.*; |
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import uk.ac.ukc.iscream.xml.*; |
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|
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/** |
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* Handle an incoming UDP packet as a separate thread. |
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* |
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* @author $Author: tdb1 $ |
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* @version $Id: FilterThread.java,v 1.8 2000/11/29 19:26:00 tdb1 Exp $ |
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*/ |
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public class FilterThread extends Thread{ |
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|
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//---FINAL ATTRIBUTES--- |
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|
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/** |
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* The current CVS revision of this class |
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*/ |
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public final String REVISION = "$Revision: 1.8 $"; |
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|
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//---STATIC METHODS--- |
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|
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//---CONSTRUCTORS--- |
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|
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// Class constructor. Obtains the byte[] from a DatagramPacket. |
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public FilterThread(DatagramPacket packet, String name, Filter parent, Logger logger){ |
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_name = name; |
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this.parent = parent; |
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this.rawPacket = packet.getData(); |
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this.logger = logger; |
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logger.write(this.toString(), Logger.DEBUG, "created"); |
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|
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} |
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|
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// Class constructor for passing XML Strings. |
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public FilterThread(String xml, String name, Filter parent, Logger logger){ |
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_name = name; |
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this.logger = logger; |
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this.parent = parent; |
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this.rawPacket = xml.getBytes(); |
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logger.write(this.toString(), Logger.DEBUG, "created"); |
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} |
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|
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//---PUBLIC METHODS--- |
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|
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public void run(){ |
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|
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// Get a string without any null characters in it. |
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String xml = new String(rawPacket); |
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if (xml.indexOf(0) != -1) { |
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xml = xml.substring(0, xml.indexOf(0)); |
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} |
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else { |
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xml = xml.substring(0, xml.length()); |
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} |
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|
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// Use my XMLPacketMaker to make an XMLPacket object. |
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XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml, logger); |
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XMLPacket packet = xmlPacketMaker.createXMLPacket(); |
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|
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logger.write(this.toString(), Logger.DEBUG, "got data, filtering and passing to parent - " + packet.printAll()); |
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|
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if (packet == null){ |
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// A null XML packet was returned - don't pass it on. |
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logger.write(this.toString(), Logger.SYSMSG, "An XML UDP packet was sucessfully filtered from the system."); |
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return; |
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} |
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|
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// Now do something with this XMLPacket!!! |
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// .... let's try this... |
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parent.receiveXML(xml); |
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|
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} |
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|
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/** |
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* Overrides the {@link java.lang.Object#toString() Object.toString()} |
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* method to provide clean logging (every class should have this). |
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* |
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* @return the name of this class and its CVS revision |
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*/ |
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public String toString() { |
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return this.getClass().getName() + "{" + _name + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")"; |
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} |
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|
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//---PRIVATE METHODS--- |
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|
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//---ACCESSOR/MUTATOR METHODS--- |
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|
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//---ATTRIBUTES--- |
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|
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Filter parent; |
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byte[] rawPacket; |
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Logger logger; |
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String _name; |
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|
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//---STATIC ATTRIBUTES--- |
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|
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} |
