Index: lams_common/src/flash/org/lamsfoundation/lams/common/comms/Communication.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/comms/Communication.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/comms/Communication.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,129 @@
+import org.lamsfoundation.lams.common.util.*
+import org.lamsfoundation.lams.common.comms.*
+/**
+* @
+* @author  DI   05/04/05
+* @version 0.1
+* 
+*/
+class org.lamsfoundation.lams.common.comms.Communication {
+    private var _serverUrl:String;
+    private var errorCodes:Array;
+    private var url:String;           //URL for server
+    private var ignoreWhite:Boolean;  //
+    private var responseXML:XML;      //XML object for server response
+    private var wddx:Wddx;            //WDDX serializer/de-serializer
+    //TODO DI 11/04/05 Manage key/handler relationship - temp solution
+    private var requestCallBack:Function;
+    private var onXMLData:Function;
+    
+    /**
+    * Comms constructor
+    */
+    function Communication(){
+        trace('Communication.constructor');
+        //Set up error codes used in communication with server
+        errorCodes=[1,2,3];
+        ignoreWhite = true;
+        _serverUrl = '';
+        wddx = new Wddx();
+    }
+    
+    /**
+    * request a design from the server
+    * @param requestUrl URL on the server for request script
+    * @param handlerFn  a callback function to call with the response object
+    */
+    public function getRequest(requestUrl:String,handlerFn:Function){
+        trace('Communication.getRequest()');
+        //Create XML response object (deleting old XML if neccesary), assign data+load events and load XML
+        if(responseXML!=null){
+            delete responseXML;
+        }
+        responseXML = new XML();
+
+        //Set ondata handler to validate data returned in XML object
+        responseXML.onData = function(src){
+            if (src != undefined) {
+                //Check for login page
+                if(src.indexOf("j_security_login_page") != -1){
+                    //TODO DI 12/04/05 deal with error from session timeout/server error
+                    trace('j_security_login_page received');
+                    this.onLoad(false);
+                }else {
+                    //Data alright, must be a packet, allow onLoad event
+                    this.parseXML(src);
+                    this.loaded=true;
+                    this.onLoad(true,this);
+                }
+            } else {
+                this.onLoad(false);
+            }            
+        }
+        //Assign onLoad handler
+        responseXML.onLoad = Proxy.create(this,xmlOnLoad,responseXML);
+        
+        //TODO DI 11/04/05 Stub here for now until we have server implmenting new WDDX structure
+        //responseXML.load(_serverUrl+requestUrl);
+        responseXML.load('xml/sampleLearningDesign.xml');
+        requestCallBack = handlerFn;
+    }
+    
+    /**
+    * XML onLoad handler called after data validation
+    * @param success            XML load status
+    * @param wrappedPacketXML   The wrapped XML response object 
+    */
+    private function xmlOnLoad(success:Boolean,wrappedPacketXML:XML){
+        /*
+        * Validate the XML
+        * If No Errors THEN
+        *   Use key to lookup the handler for the object
+        *   fire callback handler passing in server response object
+        * ELSE
+        *   deal with errors
+        * END IF
+        */
+        trace('Communication.xmlOnLoad')
+        
+        //Load ok?
+        if(success){
+            var responseObj:Object = wddx.deserialize(wrappedPacketXML);
+            //Call request handler function now that we have a response
+            //Match key with handler and call handler
+            requestCallBack(responseObj.messageValue);
+        }else {
+            //TODO DI 12/04/05 Handle onLoad error
+            trace('XML load failed!');
+        }
+    }
+    
+    /**
+    * Send an object to the server
+    */
+    public function sendObject(){
+        
+    }
+    
+    /**
+    * @param obj    WDDX Packet 
+    */
+    public function sendAndReceiveXML (obj:XML){
+        
+    }
+    
+    /**
+    * returns current server URL  
+    */
+    function get serverUrl():String{
+        return _serverUrl;
+    }
+
+
+    /**
+    * sets current server URL  
+    */
+    function set serverUrl(val:String){
+        _serverUrl = val;
+    }
+}
\ No newline at end of file
Index: lams_common/src/flash/org/lamsfoundation/lams/common/comms/Wddx.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/comms/Wddx.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/comms/Wddx.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,424 @@
+/*
+Wddx Serializer/Deserializer for Flash MX 2004 v1.0
+Coded to work with ActionScript 2.0
+-------------------------------------------------- 
+	Created by 
+		Branden Hall (bhall@waxpraxis.org)
+		Dave Gallerizzo (dgallerizzo@figleaf.com)
+
+	Based on code by
+		Simeon Simeonov (simeons@allaire.com)
+		Nate Weiss (nweiss@icesinc.com)
+
+	Version History:
+		8/10/2000 - First created
+		9/5/2000  - Minor bug fix to the deserializer
+		9/15/2000 - Commented out Wddxserializetype creation in the 
+					 deserializer as they are not needed in most cases.
+		9/21/2000 - Simplified the use of the deserializer. No longer need
+		            to create the XML object yourself and the load and
+					onLoad methods are part of the Wddx class.
+		9/30/2000 - Cleaned up code and removed load and onLoad methods.
+					Updated sample code.
+		12/28/2000 - Added new duplicate method to WddxRecordset object
+		1/10/2001 - Fixed problem where serialization caused text to always drop to lower
+					case. Thanks to Bill Tremblay for spotting this one!
+		1/17/2001 - Minor update to the serializer code so that it properly adds text nodes.
+					Thanks for the catch from Carlos Mathews! 
+					Also, the deserialization of primitive types now results in primitives 
+					rather than instances of the object wrapper
+		1/20/2001 - Quick fix to the deserializer for recordsets so that for..in loops can get
+					the elements of the recordset in the proper order.
+		2/5/2001  - Fix to the string deserialization so that it handles special characters 
+					properly, thanks to Spike Washburn for this one!
+		11/9/2001 - Finished small optimizations, fixed encoding issues and fixed case preservation
+					issue.
+		11/16/01  - (bkruse@macromedia.com)- put all Wddx classes in Object.Wddx namespace to fix
+					scoping issues.
+		4/19/2002 - Fixed various small bugs with date and number serialization/deserialization
+		4/19/2002 - Removed Wddx classes from Wddx namespace and put into _global namespace
+		9/11/2003 - Converted to AS 2.0 by Jobe Makar. Divided into two classes: Wddx and WddxRecordset
+	Authors notes: 
+		Serialization:	
+			- Create an instance of the Wddx class
+			- Call the serialize method, passing it the object your wish
+			  to serialize, it will return an XML object filled with the
+			  serialized object.
+
+
+			Example:
+				var myXML:XML;
+				var foo:Wddx = new Wddx();
+				myXML = foo.serialize(bar);
+	
+			 
+		Deserializtion:
+			- Get the XML you want to deserialize
+			- Create an instance of the Wddx class
+			- Call the serialize method of your Wddx
+			  object and pass it your XML. It will return
+			  the deserialized object.
+
+			Example:
+				var myXML:XML = new XML();
+				//
+				// XML is loaded here
+				//
+				var foo:Wddx = new Wddx();
+				var myObj:Object = foo.deserialize(myXML);
+
+			
+		- Branden 9/30/00
+
+*/
+
+import org.lamsfoundation.lams.common.comms.*
+
+class org.lamsfoundation.lams.common.comms.Wddx {
+	// Build some tables needed for CDATA encoding
+	var et:Object = new Object();
+	var etRev:Object = new Object();
+	var at:Object = new Object();
+	var atRev:Object = new Object();
+	var timezoneString:String;
+	var preserveVarCase:Boolean = true;
+	var useTimezoneInfo:Boolean = true;
+	var packet:XML;
+	var wddxPacket:XMLNode;
+	var useTimeZoneInfo:String;
+	var tzOffset:Number;
+	function Wddx() {
+		for (var i = 0; i<256; ++i) {
+			if (i<32 && i != 9 && i != 10 && i != 13) {
+				var hex = i.toString(16);
+				if (hex.length == 1) {
+					hex = "0"+hex;
+				}
+				et[i] = "<char code='"+hex+"'/>";
+				at[i] = "";
+			} else if (i<128) {
+				et[i] = chr(i);
+				at[i] = chr(i);
+			} else {
+				et[i] = "&#x"+i.toString(16)+";";
+				etRev["&#x"+i.toString(16)+";"] = chr(i);
+				at[i] = "&#x"+i.toString(16)+";";
+				atRev["&#x"+i.toString(16)+";"] = chr(i);
+			}
+		}
+		et[ord("<")] = "&lt;";
+		et[ord(">")] = "&gt;";
+		et[ord("&")] = "&amp;";
+		etRev["&lt;"] = "<";
+		etRev["&gt;"] = ">";
+		etRev["&amp;"] = "&";
+		at[ord("<")] = "&lt;";
+		at[ord(">")] = "&gt;";
+		at[ord("&")] = "&amp;";
+		at[ord("'")] = "&apos;";
+		at[ord("\"")] = "&quot;";
+		atRev["&lt;"] = "<";
+		atRev["&gt;"] = ">";
+		atRev["&amp;"] = "&";
+		atRev["&apos;"] = "'";
+		atRev["&quot;"] = "\"";
+		// Deal with timezone offsets
+		tzOffset = (new Date()).getTimezoneOffset();
+		if (tzOffset>=0) {
+			timezoneString = "-";
+		} else {
+			timezoneString = "+";
+		}
+		timezoneString += Math.floor(Math.abs(tzOffset)/60)+":"+(Math.abs(tzOffset)%60);
+	}
+	// Serialize a Flash object
+	function serialize(rootObj) {
+		delete wddxPacket;
+		var temp:XML = new XML();
+		packet = new XML();
+		packet.appendChild(temp.createElement("wddxPacket"));
+		wddxPacket = packet.firstChild;
+		wddxPacket.attributes["version"] = "1.0";
+		wddxPacket.appendChild(temp.createElement("header"));
+		wddxPacket.appendChild(temp.createElement("data"));
+		if (serializeValue(rootObj, wddxPacket.childNodes[1])) {
+			return packet;
+		} else {
+			return null;
+		}
+	}
+	// Determine the type of a Flash object and serialize it
+	function serializeValue(obj, node) {
+		var bSuccess:Boolean = true;
+		var val:String = obj.valueOf();
+		var tzString = null;
+		var temp:XML = new XML();
+		//  null object
+		if (obj == null) {
+			node.appendChild(temp.createElement("null"));
+			// string object
+		} else if (typeof (val) == "string") {
+			serializeString(val, node);
+			//  numeric objects (number or date)
+		} else if (typeof (val) == "number") {
+			//  date object
+			if (typeof (obj.getTimezoneOffset) == "function") {
+				//  deal with timezone offset if asked to
+				if (useTimeZoneInfo) {
+					tzString = timezoneString;
+				}
+				node.appendChild(temp.createElement("dateTime"));
+				node.lastChild.appendChild(temp.createTextNode(obj.getFullYear()+"-"+(obj.getMonth()+1)+"-"+obj.getDate()+"T"+obj.getHours()+":"+obj.getMinutes()+":"+obj.getSeconds()+tzString));
+				//  number object
+			} else {
+				node.appendChild((new XML()).createElement("number"));
+				node.lastChild.appendChild((new XML()).createTextNode(val));
+			}
+			//  boolean object
+		} else if (typeof (val) == "boolean") {
+			node.appendChild(temp.createElement("boolean"));
+			node.lastChild.attributes["value"] = val;
+			//  actual objects
+		} else if (typeof (obj) == "object") {
+			//  if it has a built in serializer, use it
+			if (typeof (obj.wddxSerialize) == "function") {
+				bSuccess = obj.wddxSerialize(this, node);
+				//  array object
+			} else if (typeof (obj.join) == "function" && typeof (obj.reverse) == "function") {
+				node.appendChild(temp.createElement("array"));
+				node.lastChild.attributes["length"] = obj.length;
+				for (var i:Number = 0; bSuccess && i<obj.length; ++i) {
+					bSuccess = serializeValue(obj[i], node.lastChild);
+				}
+				//  generic object
+			} else {
+				node.appendChild(temp.createElement("struct"));
+				if (typeof (obj.wddxSerializationType) == "string") {
+					node.lastChild.attributes["type"] = obj.wddxSerializationType;
+				}
+				for (var prop in obj) {
+					if (prop != "wddxSerializationType") {
+						bSuccess = serializeVariable(prop, obj[prop], node.lastChild);
+						if (!bSuccess) {
+							break;
+						}
+					}
+				}
+			}
+		} else {
+			//  Error: undefined values or functions
+			bSuccess = false;
+		}
+		//  Successful serialization
+		return bSuccess;
+	}
+	// Serialize a Flash varible
+	function serializeVariable(name:String, obj:Object, node:XMLNode) {
+		var bSuccess = true;
+		var temp = new XML();
+		if (typeof (obj) != "function") {
+			node.appendChild(temp.createElement("var"));
+			node.lastChild.attributes["name"] = preserveVarCase ? this.serializeAttr(name) : this.serializeAttr(name.toLowerCase());
+			
+		bSuccess = this.serializeValue(obj, node.lastChild);
+		}
+		return bSuccess;
+	}
+	// Serialize a Flash String
+	function serializeString(s:String, node:XMLNode) {
+		var tempString:String = "";
+		var temp:XML = new XML();
+		var max:Number = s.length;
+		node.appendChild(temp.createElement("string"));
+		for (var i:Number = 0; i<max; ++i) {
+			var char:String = substring(s, i+1, 1);
+			tempString += (this.et[ord(substring(s, i+1, 1))]);
+		}
+		node.lastChild.appendChild(temp.createTextNode(tempString));
+	}
+	// Serialize attributes of a Flash variable
+	function serializeAttr(s:String) {
+		var tempString:String = "";
+		var max:Number = s.length;
+		for (var i:Number = 0; i<max; ++i) {
+			tempString += (this.at[ord(substring(s, i+1, 1))]);
+		}
+		return (tempString);
+	}
+	// wddx deserializer
+	function deserialize(wddxPacket) {
+		if (typeof (wddxPacket) != "object") {
+			wddxPacket = new XML(wddxPacket);
+		}
+		var wddxRoot:XML = new XML();
+		var wddxChildren:Array = new Array();
+		var temp:Number;
+		var dataObj:Object = new Object();
+		// Get first node that is not Null
+		while (wddxPacket.nodeName == null) {
+			wddxPacket = wddxPacket.firstChild;
+		}
+		wddxRoot = wddxPacket;
+		if (wddxRoot.nodeName.toLowerCase() == "wddxpacket") {
+			wddxChildren = wddxRoot.childNodes;
+			temp = 0;
+			// dig down until we find the data node or run out of nodes
+			while (wddxChildren[temp].nodeName.toLowerCase() != "data" && temp<wddxChildren.length) {
+				++temp;
+			}
+			// if we found a data node then deserialize its contents
+			if (temp<wddxChildren.length) {
+				dataObj = this.deserializeNode(wddxChildren[temp].firstChild);
+				return dataObj;
+			} else {
+				return null;
+			}
+		} else {
+			return null;
+		}
+	}
+	// deserialize a single node of a WDDX packet
+	function deserializeNode(node:XMLNode) {
+		// get the name of the node
+		var nodeType:String = node.nodeName.toLowerCase();
+		// number node 
+		if (nodeType == "number") {
+			var dataObj:Object = node.firstChild.nodeValue;
+			//	dataObj.wddxSerializationType = "number";
+			return Number(dataObj);
+			// boolean node
+		} else if (nodeType == "boolean") {
+			var dataObj:Boolean = (String(node.attributes.value).toLowerCase() == "true");
+			//	dataObj.wddxSerializationType = "boolean";
+			return dataObj;
+			// string node
+		} else if (nodeType == "string") {
+			var dataObj:Object;
+			if (node.childNodes.length>1) {
+				dataObj = "";
+				var i:Number = 0;
+				for (i=0; i<node.childNodes.length; i++) {
+					if (node.childNodes[i].nodeType == 3) {
+						//this is a text node
+						dataObj = dataObj+this.deserializeString(node.childNodes[i].nodeValue);
+					} else if (node.childNodes[i].nodeName == 'char') {
+						dataObj += chr(parseInt(node.childNodes[i].attributes["code"], 16));
+					}
+				}
+			} else {
+				dataObj = this.deserializeString(node.firstChild.nodeValue);
+			}
+			//	dataObj.wddxSerializationType = "string";
+			return dataObj;
+			// array node
+		} else if (nodeType == "array") {
+			var dataObj:Array = new Array();
+			var temp:Number = 0;
+			for (var i:Number = 0; i<node.attributes["length"]; ++i) {
+				dataObj[i] = this.deserializeNode(node.childNodes[i].cloneNode(true));
+			}
+			//	dataObj.wddxSerializationType = "array";
+			return dataObj;
+			// datetime node
+		} else if (nodeType == "datetime") {
+			var dtString:Object = node.firstChild.nodeValue;
+			var tPos:Number = dtString.indexOf("T");
+			var tzPos:Number = dtString.indexOf("+");
+			var dateArray:Array = new Array();
+			var timeArray:Array = new Array();
+			var tzArray:Array = new Array();
+			var dataObj:Date = new Date();
+			if (tzPos == -1) {
+				tzPos = dtString.lastIndexOf("-");
+				if (tzPos<tPos) {
+					tzPos = -1;
+				}
+			}
+			// slice the datetime node value into the date, time, and timezone info
+			dateArray = (dtString.slice(0, tPos)).split("-");
+			timeArray = (dtString.slice(tPos+1, tzPos)).split(":");
+			tzArray = (dtString.slice(tzPos)).split(":");
+			// set the time and date of the object
+			dataObj.setFullYear(parseInt(dateArray[0]), parseInt(dateArray[1])-1, parseInt(dateArray[2]));
+			dataObj.setHours(parseInt(timeArray[0]), parseInt(timeArray[1]));
+			// deal with timezone offset if there is one
+			if (tzPos != -1) {
+				tzOffset = parseInt(tzArray[0])*60+parseInt(tzArray[1]);
+				dataObj.setMinutes(dataObj.getMinutes()-(dataObj.getTimezoneOffset()+tzOffset));
+			}
+			//	dataObj.wddxSerializationType = "datetime";
+			return dataObj;
+			// struct node
+		} else if (nodeType == "struct") {
+			var dataObj:Object = new Object();
+			for (var i = 0; i<node.childNodes.length; i++) {
+				if (node.childNodes[i].nodeName.toLowerCase() == "var") {
+					dataObj[this.deserializeAttr(node.childNodes[i].attributes["name"])] = this.deserializeNode(node.childNodes[i].firstChild);
+				}
+			}
+			//	dataObj.wddxSerializationType = "struct";
+			return dataObj;
+			// recordset node
+		} else if (nodeType == "recordset") {
+			var dataObj = new WddxRecordset((node.attributes["fieldNames"]).split(",").reverse(), parseInt(node.attributes["rowCount"]));
+			for (var i = (node.childNodes.length-1); i>=0; i--) {
+				if (node.childNodes[i].nodeName.toLowerCase() == "field") {
+					var attr:Object = this.deserializeAttr(node.childNodes[i].attributes["name"]);
+					dataObj[attr].wddxSerializationType = "field";
+					for (var j = (node.childNodes[i].childNodes.length-1); j>=0; j--) {
+						dataObj[attr][j] = new Object();
+						var tempObj:Object = this.deserializeNode(node.childNodes[i].childNodes[j]);
+						dataObj.setField(j, attr, tempObj);
+					}
+				}
+			}
+			//	dataObj.wddxSerializationType = "recordset";
+			return dataObj;
+		}
+	}
+	function deserializeAttr(attr) {
+		var max:Number = attr.length;
+		var i:Number = 0;
+		var char:String;
+		var output:String = "";
+		while (i<max) {
+			char = substring(attr, i+1, 1);
+			if (char == "&") {
+				var buff = char;
+				do {
+					char = substring(attr, i+1, 1);
+					buff += char;
+					++i;
+				} while (char != ";");
+				output += this.atRev[buff];
+			} else {
+				output += char;
+			}
+			++i;
+		}
+		return output;
+	}
+	function deserializeString(str) {
+		var max:Number = str.length;
+		var i:Number = 0;
+		var char:String;
+		var output:String = "";
+		while (i<max) {
+			char = substring(str, i+1, 1);
+			if (char == "&") {
+				var buff:String = char;
+				do {
+					++i;
+					char = substring(str, i+1, 1);
+					buff += char;
+				} while (char != ";");
+				output += this.etRev[buff];
+			} else {
+				output += char;
+			}
+			++i;
+		}
+		//trace(output);
+		return output;
+	}
+}
Index: lams_common/src/flash/org/lamsfoundation/lams/common/comms/WddxRecordset.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/comms/WddxRecordset.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/comms/WddxRecordset.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,139 @@
+import org.lamsfoundation.lams.common.comms.*
+class org.lamsfoundation.lams.common.comms.WddxRecordset {
+	//  Add default properties
+	var preserveFieldCase:Boolean = true;
+	//  Add extensions
+	/*
+		if (typeof (wddxRecordsetExtensions) == "object") {
+			for (prop in wddxRecordsetExtensions) {
+				//  Hook-up method to WddxRecordset object
+				this[prop] = wddxRecordsetExtensions[prop];
+			}
+		}
+		*/
+	//  Perfom any needed initialization
+	function WddxRecordset(arguments) {
+		if (arguments.length>0) {
+			var val;
+			if (typeof (val=arguments[0].valueOf()) == "boolean") {
+				//  Case preservation flag is provided as 1st argument
+				preserveFieldCase = arguments[0];
+			} else {
+				//  First argument is the array of column names
+				var cols = arguments[0];
+				//  Second argument could be the length or the preserve case flag
+				var nLen = 0;
+				if (arguments.length>1) {
+					if (typeof (val=arguments[1].valueOf()) == "boolean") {
+						//  Case preservation flag is provided as 2nd argument
+						preserveFieldCase = arguments[1];
+					} else {
+						//  Explicitly specified recordset length
+						nLen = arguments[1];
+						if (arguments.length>2) {
+							//  Case preservation flag is provided as 3rd argument
+							preserveFieldCase = arguments[2];
+						}
+					}
+				}
+				for (var i:Number = 0; i<cols.length; ++i) {
+					var colValue:Array = new Array(nLen);
+					for (var j:Number = 0; j<nLen; ++j) {
+						colValue[j] = null;
+					}
+					this[preserveFieldCase ? cols[i] : cols[i].toLowerCase()] = colValue;
+				}
+			}
+		}
+	}
+	//  duplicate() returns a new copy of the current recordset
+	function duplicate() {
+		var copy:WddxRecordset = new WddxRecordset();
+		for (var i in this) {
+			if (i.toUpperCase() == "PRESERVEFIELDCASE") {
+				copy[i] = this[i];
+			} else {
+				if (this[i].isColumn()) {
+					copy.addColumn(i);
+					for (var j in this[i]) {
+						copy.setField(j, i, this.getField(j, i));
+					}
+				}
+			}
+		}
+		return (copy);
+	}
+	//  isColumn(name) returns true/false based on whether this is a column name
+	function isColumn(name) {
+		return (typeof (this[name]) == "object" && name.indexOf("_private_") == -1);
+	}
+	//  getRowCount() returns the number of rows in the recordset
+	function getRowCount() {
+		var nRowCount:Number = 0;
+		for (var col in this) {
+			if (this.isColumn(col)) {
+				nRowCount = this[col].length;
+				break;
+			}
+		}
+		return nRowCount;
+	}
+	//  addColumn(name) adds a column with that name and length == getRowCount()
+	function addColumn(name:String) {
+		var nLen = this.getRowCount();
+		var colValue = new Array(nLen);
+		for (var i = 0; i<nLen; ++i) {
+			colValue[i] = null;
+		}
+		this[this.preserveFieldCase ? name : name.toLowerCase()] = colValue;
+	}
+	//  addRows() adds n rows to all columns of the recordset
+	function addRows(n:Number) {
+		for (var col in this) {
+			if (isColumn(col)) {
+				var nLen = this[col].length;
+				for (var i:Number = nLen; i<nLen+n; ++i) {
+					this[col][i] = "";
+				}
+			}
+		}
+	}
+	//  getField() returns the element in a given (row, col) position
+	function getField(row, col) {
+		return this[preserveFieldCase ? col : col.toLowerCase()][row];
+	}
+	//  setField() sets the element in a given (row, col) position to value
+	function setField(row, col, value) {
+		this[preserveFieldCase ? col : col.toLowerCase()][row] = value;
+	}
+	//  wddxSerialize() serializes a recordset
+	//  returns true/false
+	function wddxSerialize(serializer, node) {
+		var colNamesList:String = "";
+		var colNames:Array = new Array();
+		var i:Number = 0;
+		for (var col in this) {
+			if (isColumn(col)) {
+				colNames[i++] = col;
+				if (colNamesList.length>0) {
+					colNamesList += ",";
+				}
+				colNamesList += col;
+			}
+		}
+		var nRows:Number = this.getRowCount();
+		node.appendChild((new XML()).createElement("recordset"));
+		node.lastChild.attributes["rowCount"] = nRows;
+		node.lastChild.attributes["fieldNames"] = colNamesList;
+		var bSuccess:Boolean = true;
+		for (i=0; bSuccess && i<colNames.length; i++) {
+			var name = colNames[i];
+			node.lastChild.appendChild((new XML()).createElement("field"));
+			node.lastChild.lastChild.attributes["name"] = name;
+			for (var row:Number = 0; bSuccess && row<nRows; row++) {
+				bSuccess = serializer.serializeValue(this[name][row], node.lastChild.lastChild);
+			}
+		}
+		return bSuccess;
+	}
+}
Index: lams_common/src/flash/org/lamsfoundation/lams/common/mvc/AbstractController.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/mvc/AbstractController.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/mvc/AbstractController.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,42 @@
+import org.lamsfoundation.lams.common.util.*;
+import org.lamsfoundation.lams.common.mvc.*;
+/**
+* Provides basic services for the "controller" of a Model/View/Controller triad.
+*/
+class org.lamsfoundation.lams.common.mvc.AbstractController implements Controller {
+	private var model : Observable;
+	private var view : View;
+	/**
+	* Constructor
+	*
+	* @param   m   The model this controller's view is observing.
+	*/
+	public function AbstractController (m:Observable){
+		// Set the model.
+		setModel (m);
+	}
+	/**
+	* Sets the model for this controller.
+	*/
+	public function setModel (m : Observable):Void 	{
+		model = m;
+	}
+	/**
+	* Returns the model for this controller.
+	*/
+	public function getModel () : Observable {
+		return model;
+	}
+	/**
+	* Sets the view that this controller is servicing.
+	*/
+	public function setView (v : View) : Void {
+		view = v;
+	}
+	/**
+	* Returns this controller's view.
+	*/
+	public function getView () : View {
+		return view;
+	}
+}
Index: lams_common/src/flash/org/lamsfoundation/lams/common/mvc/AbstractView.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/mvc/AbstractView.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/mvc/AbstractView.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,74 @@
+import org.lamsfoundation.lams.common.util.*;
+import org.lamsfoundation.lams.common.mvc.*;
+
+/**
+ * Provides basic services for the "view" of
+ * a Model/View/Controller triad.
+ */
+class org.lamsfoundation.lams.common.mvc.AbstractView implements Observer, View {
+  private var model:Observable;
+  private var controller:Controller;
+
+  public function AbstractView (m:Observable, c:Controller) {
+    // Set the model.
+    setModel(m);
+    // If a controller was supplied, use it. Otherwise let the first
+    // call to getController() create the default controller.
+    if (c !== undefined) {
+      setController(c);
+    }
+  }
+
+  /**
+   * Returns the default controller for this view.
+   */
+  public function defaultController (model:Observable):Controller {
+    return null;
+  }
+
+  /**
+   * Sets the model this view is observing.
+   */
+  public function setModel (m:Observable):Void {
+    model = m;
+  }
+
+  /**
+   * Returns the model this view is observing.
+   */
+  public function getModel ():Observable {
+    return model;
+  }
+
+  /**
+   * Sets the controller for this view.
+   */
+  public function setController (c:Controller):Void {
+    controller = c;
+    // Tell the controller this object is its view.
+    getController().setView(this);
+  }
+
+  /**
+   * Returns this view's controller.
+   */
+  public function getController ():Controller {
+     //trace('getController()');
+    // If a controller hasn't been defined yet...
+    if (controller === undefined) {
+      // ...make one. Note that defaultController() is normally overridden 
+      // by the AbstractView subclass so that it returns the appropriate
+      // controller for the view.
+      setController(defaultController(getModel()));
+    }
+    return controller;
+  }
+
+  /**
+   * A do-nothing implementation of the Observer interface's
+   * update() method. Subclasses of AbstractView will provide
+   * a concrete implementation for this method.
+   */
+  public function update(o:Observable, infoObj:Object):Void {
+  }
+}
\ No newline at end of file
Index: lams_common/src/flash/org/lamsfoundation/lams/common/mvc/Controller.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/mvc/Controller.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/mvc/Controller.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,28 @@
+import org.lamsfoundation.lams.common.util.*;
+import org.lamsfoundation.lams.common.mvc.*;
+
+/**
+ * Specifies the minimum services that the "controller" of
+ * a Model/View/Controller triad must provide.
+ */
+interface org.lamsfoundation.lams.common.mvc.Controller {
+  /**
+   * Sets the model for this controller.
+   */
+  public function setModel (m:Observable):Void;
+
+  /**
+   * Returns the model for this controller.
+   */
+  public function getModel ():Observable;
+
+  /**
+   * Sets the view this controller is servicing.
+   */
+  public function setView (v:View):Void;
+
+  /**
+   * Returns this controller's view.
+   */
+  public function getView ():View;
+}
\ No newline at end of file
Index: lams_common/src/flash/org/lamsfoundation/lams/common/mvc/View.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/mvc/View.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/mvc/View.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,33 @@
+import org.lamsfoundation.lams.common.util.*;
+import org.lamsfoundation.lams.common.mvc.*;
+
+/**
+ * Specifies the minimum services that the "view" 
+ * of a Model/View/Controller triad must provide.
+ */
+interface org.lamsfoundation.lams.common.mvc.View {
+  /**
+   * Sets the model this view is observing.
+   */
+  public function setModel (m:Observable):Void;
+
+  /**
+   * Returns the model this view is observing.
+   */
+  public function getModel ():Observable;
+
+  /**
+   * Sets the controller for this view.
+   */
+  public function setController (c:Controller):Void;
+
+  /**
+   * Returns this view's controller.
+   */
+  public function getController ():Controller;
+
+  /**
+   * Returns the default controller for this view.
+   */
+  public function defaultController (model:Observable):Controller;
+}
\ No newline at end of file
Index: lams_common/src/flash/org/lamsfoundation/lams/common/util/CallBack.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/util/CallBack.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/util/CallBack.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,39 @@
+/**
+ *
+ * @author  DI
+ * @version 12/04/05
+ * 
+ */
+ class org.lamsfoundation.lams.common.util.CallBack {
+    
+    private var scope:Object;
+    private var fn:Function;
+    private var args:Array;
+    
+    
+    function CallBack(scope:Object,fn:Function){
+        this.scope = scope;
+        this.fn = fn;
+        args = [];
+        
+        //Get arguments from the arguments object ignoring first two as they are scope+function
+		var l = arguments.length;
+		for (var i = 2; i < l; i++) {
+			args[i - 2] = arguments[i];
+		}
+    }
+    
+    /**
+    * Apply the callback
+    */
+    public function call(){
+        fn.apply(scope,args);
+    }
+    
+    /**
+    * Adds additional arguments to args array for dynamic runtime callback modification
+    */
+    public function addArgs(extraArgs:Array){
+        args = args.concat(extraArgs);
+    }
+}
\ No newline at end of file
Index: lams_common/src/flash/org/lamsfoundation/lams/common/util/Observable.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/util/Observable.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/util/Observable.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,131 @@
+import org.lamsfoundation.lams.common.util.Observer;
+
+/**
+ * A Java-style Observable class used to represent the "subject"
+ * of the Observer design pattern. Observers must implement the Observer
+ * interface, and register to observe the subject via addObserver().
+ */
+class org.lamsfoundation.lams.common.util.Observable {
+  // A flag indicating whether this object has changed.
+  private var changed:Boolean = false;
+  // A list of observers.
+  private var observers:Array;
+
+  /**
+   * Constructor function.
+   */
+  public function Observable () {
+    observers = new Array();
+  }
+
+  /**
+   * Adds an observer to the list of observers.
+   * @param   o   The observer to be added.
+   */
+  public function addObserver(o:Observer):Boolean {
+    // Can't add a null observer.
+    if (o == null) {
+      return false;
+    }
+
+    // Don't add an observer more than once.
+    for (var i:Number = 0; i < observers.length; i++) {
+      if (observers[i] == o) {
+        // The observer is already observing, so quit.
+        return false;
+      }
+    }
+
+    // Put the observer into the list.
+    observers.push(o);
+    return true;
+  }
+
+  /**
+   * Removes an observer from the list of observers.
+   *
+   * @param   o   The observer to remove.
+   */
+  public function removeObserver(o:Observer):Boolean {
+    // Find and remove the observer.
+    var len:Number = observers.length;
+    for (var i:Number = 0; i < len; i++) {
+      if (observers[i] == o) {
+        observers.splice(i, 1);
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /**
+   * Tell all observers that the subject has changed.
+   *
+   * @param   infoObj   An object containing arbitrary data 
+   *                    to pass to observers.
+   */
+  public function notifyObservers(infoObj:Object):Void {
+    // Use a null infoObject if none is supplied.
+    if (infoObj == undefined) {
+      infoObj = null;
+    }
+
+    // If the object hasn't changed, don't bother notifying observers.
+    if (!changed) {
+      return;
+    }
+
+    // Make a copy of the observers array. We do this
+    // so that we can be sure the list won't change while
+    // we're processing it.
+    var observersSnapshot:Array = observers.slice(0);
+
+    // This change has been processed, so unset the "changed" flag.
+    clearChanged();
+
+    // Invoke update() on all observers.
+    for (var i:Number = observersSnapshot.length-1; i >= 0; i--) {
+      observersSnapshot[i].update(this, infoObj);
+    }
+  }
+
+  /**
+   * Removes all observers from the observer list.
+   */
+  public function clearObservers():Void {
+    observers = new Array();
+  }
+
+  /**
+   * Indicates that the subject has changed.
+   */
+  private function setChanged():Void {
+    changed = true;
+  }
+
+  /**
+   * Indicates that the subject has either not changed or
+   * has notified its observers of the most recent change.
+   */
+  private function clearChanged():Void {
+    changed = false;
+  }
+
+  /**
+   * Checks if the subject has changed.
+   *
+   * @return   true if the subject has changed, as determined by setChanged().
+   */
+  public function hasChanged():Boolean {
+    return changed;
+  }
+
+  /**
+   * Returns the number of observers in the observer list.
+   *
+   * @return   An integer: the number of observers for this subject.
+   */
+  public function countObservers():Number {
+    return observers.length;
+  }
+}
\ No newline at end of file
Index: lams_common/src/flash/org/lamsfoundation/lams/common/util/Observer.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/util/Observer.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/util/Observer.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,16 @@
+import org.lamsfoundation.lams.common.util.Observable;
+
+/**
+ * The interface that must be implemented by all observers of an
+ * Observable object.
+ */
+interface org.lamsfoundation.lams.common.util.Observer {
+  /**
+   * Invoked automatically by an observed object when it changes.
+   * 
+   * @param   o   The observed object (an instance of Observable).
+   * @param   infoObj   An arbitrary data object sent by 
+   *                    the observed object.
+   */
+  public function update(o:Observable, infoObj:Object):Void;
+}
\ No newline at end of file
Index: lams_common/src/flash/org/lamsfoundation/lams/common/util/Proxy.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/util/Proxy.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/util/Proxy.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,17 @@
+import org.lamsfoundation.lams.common.util.*
+class org.lamsfoundation.lams.common.util.Proxy {
+	public static function create (oTarget:Object, fFunction:Function):Function	{
+		var parameters:Array = new Array ();
+		var l = arguments.length;
+		
+		for (var i = 2; i < l; i++) {
+			parameters[i - 2] = arguments[i];
+		}
+		
+		var fProxy:Function = function (){
+			var totalParameters:Array = arguments.concat (parameters);
+			fFunction.apply (oTarget, totalParameters);
+		};
+		return fProxy;
+	}
+}
Index: lams_common/src/flash/org/lamsfoundation/lams/common/ws/Workspace.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/ws/Workspace.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/ws/Workspace.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,39 @@
+import org.lamsfoundation.lams.common.ws.*
+import org.lamsfoundation.lams.authoring.*
+
+/**
+* Canvas is
+*/
+class org.lamsfoundation.lams.common.ws.Workspace {
+	//Model
+	private var workspaceModel:WorkspaceModel;
+	//View
+	private var workspaceView:WorkspaceView;
+
+	/**
+	 * workspace Constructor
+	 *
+	 * @param   target_mc	Target clip for attaching view
+	 */
+	public function Workspace (target_mc:MovieClip,depth:Number,x:Number,y:Number,w:Number,h:Number){
+        //trace('workspace.constructor')
+		//Create the model.
+		workspaceModel = new WorkspaceModel();
+		
+		//Create the authoring view and register with model
+		workspaceView = new WorkspaceView(workspaceModel, undefined,target_mc,depth,x,y,w,h);
+		workspaceModel.addObserver(workspaceView);
+	}
+	
+    
+    public function userSelectItem(id:Number){
+        trace('Workspace.userSelectItem');
+        //todo DI 07/04/05 write code user design selection, just a stub at the moment, calls itemSelected
+        itemSelected(1);
+    }
+    
+    private function itemSelected(designId:Number){
+        //Design has been chosen, get Canvas to open design
+        Application.getInstance().getCanvas().openDesignById(designId);
+    }
+}
Index: lams_common/src/flash/org/lamsfoundation/lams/common/ws/WorkspaceController.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/ws/WorkspaceController.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/ws/WorkspaceController.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,18 @@
+import org.lamsfoundation.lams.common.ws.CanvasModel
+import org.lamsfoundation.lams.common.mvc.*
+import org.lamsfoundation.lams.common.util.*
+
+/*
+* Makes changes to the Canvas Authoring model's data based on user input.
+*/
+class org.lamsfoundation.lams.common.ws.WorkspaceController extends AbstractController {
+	/**
+	* Constructor
+	*
+	* @param   cm   The model to modify.
+	*/
+	public function WorkspaceController (cm:Observable) {
+		super (cm);
+	}
+   
+}
Index: lams_common/src/flash/org/lamsfoundation/lams/common/ws/WorkspaceModel.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/ws/WorkspaceModel.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/ws/WorkspaceModel.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,12 @@
+import org.lamsfoundation.lams.common.util.Observable;
+import org.lamsfoundation.lams.common.ws.*;
+/*
+* Model for the Canvas
+*/
+class org.lamsfoundation.lams.common.ws.WorkspaceModel extends Observable {
+	/*
+	* Constructor.
+	*/
+	public function WorkspaceModel (){
+	}
+}
Index: lams_common/src/flash/org/lamsfoundation/lams/common/ws/WorkspaceView.as
===================================================================
diff -u
--- lams_common/src/flash/org/lamsfoundation/lams/common/ws/WorkspaceView.as	(revision 0)
+++ lams_common/src/flash/org/lamsfoundation/lams/common/ws/WorkspaceView.as	(revision 0c2296844646cad43d3baf2c2bbfe745367ef1cc)
@@ -0,0 +1,50 @@
+import org.lamsfoundation.lams.common.util.*
+import org.lamsfoundation.lams.common.ws.*
+import org.lamsfoundation.lams.common.mvc.*
+/**
+Authoring view for the canvas
+*/
+class org.lamsfoundation.lams.common.ws.WorkspaceView extends AbstractView 
+{
+	//Canvas clip
+	private var _workspace_mc:MovieClip;
+	
+	/*
+	* Constructor
+	*/
+	public function WorkspaceView (m:Observable, c:Controller,target_mc:MovieClip,depth:Number,x:Number,y:Number,w:Number,h:Number){
+		// Invoke superconstructor, which sets up MVC relationships.
+		// This view has no user inputs, so no controller is required.
+		super (m, c);
+		//
+		createWorkspace (target_mc,depth,x,y,w,h);
+	}
+	/*
+	* Creates workspace movie clip 
+	*
+	* @param   target_mc	The clip in which to create the movie clip.
+	* @param   depth   		The depth at which to create the movie clip.
+	* @param   x   			The movie clip's horizontal position in target.
+	* @param   y   			The movie clip's vertical position in target.
+	*/
+	public function createWorkspace (target_mc:MovieClip,depth:Number,x:Number,y:Number,w:Number,h:Number):Void 
+	{
+		_workspace_mc = target_mc.attachMovie ("Workspace", "workspace_mc", depth);
+		_workspace_mc._x = x;
+		_workspace_mc._y = y;
+		_workspace_mc.bg_mc._width = w;
+		_workspace_mc.bg_mc._height = h;
+        //Workspace initially invisible
+        _workspace_mc._visible = false;
+	}
+	
+	/*
+	* Updates state of the canvas, called by Canvas Model
+	*
+	* @param   o   		The model object that is broadcasting an update.
+	* @param   infoObj  object with details of changes to model
+	*/
+	public function update (o:Observable,infoObj:Object):Void {
+		//Go through update object and update mc with visual changes required 
+	}
+}