--- projects/cms/source/util/uk/org/iscream/cms/util/XMLPacketMaker.java	2000/12/12 20:44:30	1.7
+++ projects/cms/source/util/uk/org/iscream/cms/util/XMLPacketMaker.java	2001/03/10 04:03:52	1.13
@@ -3,62 +3,54 @@ package uk.ac.ukc.iscream.util;
 
 //---IMPORTS---
 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;
+import javax.xml.parsers.*;
 
-import uk.ac.ukc.iscream.core.*;
-
 /**
  * XMLPacketMaker - Creates an XMLPacket object.
  *
- * @author  $Author: ajm $
- * @version $Id: XMLPacketMaker.java,v 1.7 2000/12/12 20:44:30 ajm Exp $
+ * @author  $Author: tdb $
+ * @version $Id: XMLPacketMaker.java,v 1.13 2001/03/10 04:03:52 tdb Exp $
  */
-public class XMLPacketMaker extends HandlerBase {
+public class XMLPacketMaker {
 
 //---FINAL ATTRIBUTES---
 
     /**
      * The current CVS revision of this class
      */
-    public final String REVISION = "$Revision: 1.7 $";
-    
+    public final String REVISION = "$Revision: 1.13 $";
+     
 //---STATIC METHODS---
 
 //---CONSTRUCTORS---
 
-    // Constructor for accepting XML input.
-    public XMLPacketMaker (String xml) {
-        _xml = xml;
-    }
-
 //---PUBLIC METHODS---
 
-    public XMLPacket createXMLPacket() {
+    /**
+     * Method to create an XML packet from the data this
+     * class was constructed with.
+     *
+     * @param xml the XML String to parse
+     * @return an XMLPacket representing the XML String given
+     * @throws InvalidXMLException if the XML cannot be parsed
+     */
+    public XMLPacket createXMLPacket(String xml) throws InvalidXMLException {
 
         // 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
-            InputSource inputSource = new InputSource(new StringReader(_xml));
-            SAXParser saxParser = factory.newSAXParser();
-            saxParser.parse(inputSource, new XMLStringParser(packet));
-
+            InputSource inputSource = new InputSource(new StringReader(xml));
+            _factory.newSAXParser().parse(inputSource, new XMLStringParser(packet));
         }
         catch (Exception e) {
-            _logger.write(this.toString(), Logger.WARNING, e.toString());
-            _logger.write(this.toString(), Logger.WARNING, "An invalid XML UDP packet has been detected: "+packet.printAll());
-            return null;
+            // couldn't parse the XML for some reason
+            throw new InvalidXMLException("Could not parse the XML: "+xml);
         }
         
+        // parsed successfully, return the packet
         return packet;
     }
 
@@ -83,19 +75,8 @@ public class XMLPacketMaker extends HandlerBase {
 //---ACCESSOR/MUTATOR METHODS---
 
 //---ATTRIBUTES---
-
-    /**
-     * Holds the xml
-     */
-    String _xml;
     
     /**
-     * This holds a reference to the
-     * system logger that is being used.
-     */
-    private Logger _logger = ReferenceManager.getInstance().getLogger();
-    
-    /**
      * This is the friendly identifier of the
      * component this class is running in.
      * eg, a Filter may be called "filter1",
@@ -107,5 +88,10 @@ public class XMLPacketMaker extends HandlerBase {
     private String _name = null;
 
 //---STATIC ATTRIBUTES---
+
+    /** 
+     * A static reference to the system saxParser factory
+     */ 
+    private static SAXParserFactory _factory = SAXParserFactory.newInstance();
 
 }