1 |
//---PACKAGE DECLARATION--- |
2 |
package uk.ac.ukc.iscream.filter; |
3 |
|
4 |
//---IMPORTS--- |
5 |
import java.io.*; |
6 |
import java.net.*; |
7 |
import java.util.*; |
8 |
import uk.ac.ukc.iscream.core.*; |
9 |
import uk.ac.ukc.iscream.filter.*; |
10 |
import uk.ac.ukc.iscream.util.*; |
11 |
|
12 |
/** |
13 |
* Handle an incoming UDP packet as a separate thread. |
14 |
* |
15 |
* @author $Author: ajm4 $ |
16 |
* @version $Id: FilterThread.java,v 1.12 2000/11/30 03:16:17 ajm4 Exp $ |
17 |
*/ |
18 |
public class FilterThread extends Thread{ |
19 |
|
20 |
//---FINAL ATTRIBUTES--- |
21 |
|
22 |
/** |
23 |
* The current CVS revision of this class |
24 |
*/ |
25 |
public final String REVISION = "$Revision: 1.12 $"; |
26 |
|
27 |
//---STATIC METHODS--- |
28 |
|
29 |
//---CONSTRUCTORS--- |
30 |
|
31 |
// Class constructor. Obtains the byte[] from a DatagramPacket. |
32 |
public FilterThread(DatagramPacket packet, Filter parent){ |
33 |
_parent = parent; |
34 |
_rawPacket = packet.getData(); |
35 |
_logger.write(this.toString(), Logger.DEBUG, "created"); |
36 |
|
37 |
} |
38 |
|
39 |
// Class constructor for passing XML Strings. |
40 |
public FilterThread(String xml, Filter parent){ |
41 |
_parent = parent; |
42 |
_rawPacket = xml.getBytes(); |
43 |
_logger.write(this.toString(), Logger.DEBUG, "created"); |
44 |
} |
45 |
|
46 |
//---PUBLIC METHODS--- |
47 |
|
48 |
public void run(){ |
49 |
|
50 |
// Get a string without any null characters in it. |
51 |
// -- maybe String.trim() would be better here ? |
52 |
String xml = new String(_rawPacket); |
53 |
if (xml.indexOf(0) != -1) { |
54 |
xml = xml.substring(0, xml.indexOf(0)); |
55 |
} |
56 |
else { |
57 |
xml = xml.substring(0, xml.length()); |
58 |
} |
59 |
|
60 |
// Use my XMLPacketMaker to make an XMLPacket object. |
61 |
XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml); |
62 |
XMLPacket packet = xmlPacketMaker.createXMLPacket(); |
63 |
|
64 |
if(packet != null && PluginFilterManager.getInstance().runFilters(packet)) { |
65 |
// packet is not null |
66 |
// packet was not dropped by a plugin |
67 |
// ... best pass it on ! |
68 |
_parent.receiveXML(xml); |
69 |
} |
70 |
else { |
71 |
// either we had a null, or a plugin dropped it |
72 |
_logger.write(this.toString(), Logger.DEBUG, "An XML packet was sucessfully filtered from the system."); |
73 |
} |
74 |
|
75 |
} |
76 |
|
77 |
/** |
78 |
* Overrides the {@link java.lang.Object#toString() Object.toString()} |
79 |
* method to provide clean logging (every class should have this). |
80 |
* |
81 |
* @return the name of this class and its CVS revision |
82 |
*/ |
83 |
public String toString() { |
84 |
return this.getClass().getName() + "{" + _name + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")"; |
85 |
} |
86 |
|
87 |
//---PRIVATE METHODS--- |
88 |
|
89 |
//---ACCESSOR/MUTATOR METHODS--- |
90 |
|
91 |
//---ATTRIBUTES--- |
92 |
|
93 |
Filter _parent; |
94 |
byte[] _rawPacket; |
95 |
Logger _logger = ReferenceManager.getInstance().getLogger(); |
96 |
String _name = ReferenceManager.getInstance().getName(); |
97 |
|
98 |
//---STATIC ATTRIBUTES--- |
99 |
|
100 |
} |