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Subject: svn commit: r1608218 [9/14] - in
 /roller/trunk/app/src/main/webapp/roller-ui/yui: animation/
 assets/skins/sam/ autocomplete/ autocomplete/assets/
 autocomplete/assets/skins/sam/ base/ button/ button/assets/
 button/assets/skins/sam/ connection/ container...
Date: Sun, 06 Jul 2014 15:15:21 -0000
To: commits@roller.apache.org
From: snoopdave@apache.org
Message-Id: <20140706151525.C2CDE2388BA2@eris.apache.org>

Added: roller/trunk/app/src/main/webapp/roller-ui/yui/datasource/datasource-debug.js
URL: http://svn.apache.org/viewvc/roller/trunk/app/src/main/webapp/roller-ui/yui/datasource/datasource-debug.js?rev=1608218&view=auto
==============================================================================
--- roller/trunk/app/src/main/webapp/roller-ui/yui/datasource/datasource-debug.js (added)
+++ roller/trunk/app/src/main/webapp/roller-ui/yui/datasource/datasource-debug.js Sun Jul  6 15:15:18 2014
@@ -0,0 +1,3067 @@
+/*
+Copyright (c) 2010, Yahoo! Inc. All rights reserved.
+Code licensed under the BSD License:
+http://developer.yahoo.net/yui/license.txt
+version: 2.8.0r6
+*/
+(function () {
+
+var lang   = YAHOO.lang,
+    util   = YAHOO.util,
+    Ev     = util.Event;
+
+/**
+ * The DataSource utility provides a common configurable interface for widgets to
+ * access a variety of data, from JavaScript arrays to online database servers.
+ *
+ * @module datasource
+ * @requires yahoo, event
+ * @optional json, get, connection 
+ * @title DataSource Utility
+ */
+
+/****************************************************************************/
+/****************************************************************************/
+/****************************************************************************/
+
+/**
+ * Base class for the YUI DataSource utility.
+ *
+ * @namespace YAHOO.util
+ * @class YAHOO.util.DataSourceBase
+ * @constructor
+ * @param oLiveData {HTMLElement}  Pointer to live data.
+ * @param oConfigs {object} (optional) Object literal of configuration values.
+ */
+util.DataSourceBase = function(oLiveData, oConfigs) {
+    if(oLiveData === null || oLiveData === undefined) {
+        YAHOO.log("Could not instantiate DataSource due to invalid live database",
+                "error", this.toString());
+        return;
+    }
+    
+    this.liveData = oLiveData;
+    this._oQueue = {interval:null, conn:null, requests:[]};
+    this.responseSchema = {};   
+
+    // Set any config params passed in to override defaults
+    if(oConfigs && (oConfigs.constructor == Object)) {
+        for(var sConfig in oConfigs) {
+            if(sConfig) {
+                this[sConfig] = oConfigs[sConfig];
+            }
+        }
+    }
+    
+    // Validate and initialize public configs
+    var maxCacheEntries = this.maxCacheEntries;
+    if(!lang.isNumber(maxCacheEntries) || (maxCacheEntries < 0)) {
+        maxCacheEntries = 0;
+    }
+
+    // Initialize interval tracker
+    this._aIntervals = [];
+
+    /////////////////////////////////////////////////////////////////////////////
+    //
+    // Custom Events
+    //
+    /////////////////////////////////////////////////////////////////////////////
+
+    /**
+     * Fired when a request is made to the local cache.
+     *
+     * @event cacheRequestEvent
+     * @param oArgs.request {Object} The request object.
+     * @param oArgs.callback {Object} The callback object.
+     * @param oArgs.caller {Object} (deprecated) Use callback.scope.
+     */
+    this.createEvent("cacheRequestEvent");
+
+    /**
+     * Fired when data is retrieved from the local cache.
+     *
+     * @event cacheResponseEvent
+     * @param oArgs.request {Object} The request object.
+     * @param oArgs.response {Object} The response object.
+     * @param oArgs.callback {Object} The callback object.
+     * @param oArgs.caller {Object} (deprecated) Use callback.scope.
+     */
+    this.createEvent("cacheResponseEvent");
+
+    /**
+     * Fired when a request is sent to the live data source.
+     *
+     * @event requestEvent
+     * @param oArgs.request {Object} The request object.
+     * @param oArgs.callback {Object} The callback object.
+     * @param oArgs.tId {Number} Transaction ID.     
+     * @param oArgs.caller {Object} (deprecated) Use callback.scope.
+     */
+    this.createEvent("requestEvent");
+
+    /**
+     * Fired when live data source sends response.
+     *
+     * @event responseEvent
+     * @param oArgs.request {Object} The request object.
+     * @param oArgs.response {Object} The raw response object.
+     * @param oArgs.callback {Object} The callback object.
+     * @param oArgs.tId {Number} Transaction ID.     
+     * @param oArgs.caller {Object} (deprecated) Use callback.scope.
+     */
+    this.createEvent("responseEvent");
+
+    /**
+     * Fired when response is parsed.
+     *
+     * @event responseParseEvent
+     * @param oArgs.request {Object} The request object.
+     * @param oArgs.response {Object} The parsed response object.
+     * @param oArgs.callback {Object} The callback object.
+     * @param oArgs.caller {Object} (deprecated) Use callback.scope.
+     */
+    this.createEvent("responseParseEvent");
+
+    /**
+     * Fired when response is cached.
+     *
+     * @event responseCacheEvent
+     * @param oArgs.request {Object} The request object.
+     * @param oArgs.response {Object} The parsed response object.
+     * @param oArgs.callback {Object} The callback object.
+     * @param oArgs.caller {Object} (deprecated) Use callback.scope.
+     */
+    this.createEvent("responseCacheEvent");
+    /**
+     * Fired when an error is encountered with the live data source.
+     *
+     * @event dataErrorEvent
+     * @param oArgs.request {Object} The request object.
+     * @param oArgs.response {String} The response object (if available).
+     * @param oArgs.callback {Object} The callback object.
+     * @param oArgs.caller {Object} (deprecated) Use callback.scope.
+     * @param oArgs.message {String} The error message.
+     */
+    this.createEvent("dataErrorEvent");
+
+    /**
+     * Fired when the local cache is flushed.
+     *
+     * @event cacheFlushEvent
+     */
+    this.createEvent("cacheFlushEvent");
+
+    var DS = util.DataSourceBase;
+    this._sName = "DataSource instance" + DS._nIndex;
+    DS._nIndex++;
+    YAHOO.log("DataSource initialized", "info", this.toString());
+};
+
+var DS = util.DataSourceBase;
+
+lang.augmentObject(DS, {
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// DataSourceBase public constants
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Type is unknown.
+ *
+ * @property TYPE_UNKNOWN
+ * @type Number
+ * @final
+ * @default -1
+ */
+TYPE_UNKNOWN : -1,
+
+/**
+ * Type is a JavaScript Array.
+ *
+ * @property TYPE_JSARRAY
+ * @type Number
+ * @final
+ * @default 0
+ */
+TYPE_JSARRAY : 0,
+
+/**
+ * Type is a JavaScript Function.
+ *
+ * @property TYPE_JSFUNCTION
+ * @type Number
+ * @final
+ * @default 1
+ */
+TYPE_JSFUNCTION : 1,
+
+/**
+ * Type is hosted on a server via an XHR connection.
+ *
+ * @property TYPE_XHR
+ * @type Number
+ * @final
+ * @default 2
+ */
+TYPE_XHR : 2,
+
+/**
+ * Type is JSON.
+ *
+ * @property TYPE_JSON
+ * @type Number
+ * @final
+ * @default 3
+ */
+TYPE_JSON : 3,
+
+/**
+ * Type is XML.
+ *
+ * @property TYPE_XML
+ * @type Number
+ * @final
+ * @default 4
+ */
+TYPE_XML : 4,
+
+/**
+ * Type is plain text.
+ *
+ * @property TYPE_TEXT
+ * @type Number
+ * @final
+ * @default 5
+ */
+TYPE_TEXT : 5,
+
+/**
+ * Type is an HTML TABLE element. Data is parsed out of TR elements from all TBODY elements.
+ *
+ * @property TYPE_HTMLTABLE
+ * @type Number
+ * @final
+ * @default 6
+ */
+TYPE_HTMLTABLE : 6,
+
+/**
+ * Type is hosted on a server via a dynamic script node.
+ *
+ * @property TYPE_SCRIPTNODE
+ * @type Number
+ * @final
+ * @default 7
+ */
+TYPE_SCRIPTNODE : 7,
+
+/**
+ * Type is local.
+ *
+ * @property TYPE_LOCAL
+ * @type Number
+ * @final
+ * @default 8
+ */
+TYPE_LOCAL : 8,
+
+/**
+ * Error message for invalid dataresponses.
+ *
+ * @property ERROR_DATAINVALID
+ * @type String
+ * @final
+ * @default "Invalid data"
+ */
+ERROR_DATAINVALID : "Invalid data",
+
+/**
+ * Error message for null data responses.
+ *
+ * @property ERROR_DATANULL
+ * @type String
+ * @final
+ * @default "Null data"
+ */
+ERROR_DATANULL : "Null data",
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// DataSourceBase private static properties
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Internal class variable to index multiple DataSource instances.
+ *
+ * @property DataSourceBase._nIndex
+ * @type Number
+ * @private
+ * @static
+ */
+_nIndex : 0,
+
+/**
+ * Internal class variable to assign unique transaction IDs.
+ *
+ * @property DataSourceBase._nTransactionId
+ * @type Number
+ * @private
+ * @static
+ */
+_nTransactionId : 0,
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// DataSourceBase private static methods
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Get an XPath-specified value for a given field from an XML node or document.
+ *
+ * @method _getLocationValue
+ * @param field {String | Object} Field definition.
+ * @param context {Object} XML node or document to search within.
+ * @return {Object} Data value or null.
+ * @static
+ * @private
+ */
+_getLocationValue: function(field, context) {
+    var locator = field.locator || field.key || field,
+        xmldoc = context.ownerDocument || context,
+        result, res, value = null;
+
+    try {
+        // Standards mode
+        if(!lang.isUndefined(xmldoc.evaluate)) {
+            result = xmldoc.evaluate(locator, context, xmldoc.createNSResolver(!context.ownerDocument ? context.documentElement : context.ownerDocument.documentElement), 0, null);
+            while(res = result.iterateNext()) {
+                value = res.textContent;
+            }
+        }
+        // IE mode
+        else {
+            xmldoc.setProperty("SelectionLanguage", "XPath");
+            result = context.selectNodes(locator)[0];
+            value = result.value || result.text || null;
+        }
+        return value;
+
+    }
+    catch(e) {
+    }
+},
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// DataSourceBase public static methods
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Executes a configured callback.  For object literal callbacks, the third
+ * param determines whether to execute the success handler or failure handler.
+ *  
+ * @method issueCallback
+ * @param callback {Function|Object} the callback to execute
+ * @param params {Array} params to be passed to the callback method
+ * @param error {Boolean} whether an error occurred
+ * @param scope {Object} the scope from which to execute the callback
+ * (deprecated - use an object literal callback)
+ * @static     
+ */
+issueCallback : function (callback,params,error,scope) {
+    if (lang.isFunction(callback)) {
+        callback.apply(scope, params);
+    } else if (lang.isObject(callback)) {
+        scope = callback.scope || scope || window;
+        var callbackFunc = callback.success;
+        if (error) {
+            callbackFunc = callback.failure;
+        }
+        if (callbackFunc) {
+            callbackFunc.apply(scope, params.concat([callback.argument]));
+        }
+    }
+},
+
+/**
+ * Converts data to type String.
+ *
+ * @method DataSourceBase.parseString
+ * @param oData {String | Number | Boolean | Date | Array | Object} Data to parse.
+ * The special values null and undefined will return null.
+ * @return {String} A string, or null.
+ * @static
+ */
+parseString : function(oData) {
+    // Special case null and undefined
+    if(!lang.isValue(oData)) {
+        return null;
+    }
+    
+    //Convert to string
+    var string = oData + "";
+
+    // Validate
+    if(lang.isString(string)) {
+        return string;
+    }
+    else {
+        YAHOO.log("Could not convert data " + lang.dump(oData) + " to type String", "warn", this.toString());
+        return null;
+    }
+},
+
+/**
+ * Converts data to type Number.
+ *
+ * @method DataSourceBase.parseNumber
+ * @param oData {String | Number | Boolean} Data to convert. Note, the following
+ * values return as null: null, undefined, NaN, "". 
+ * @return {Number} A number, or null.
+ * @static
+ */
+parseNumber : function(oData) {
+    if(!lang.isValue(oData) || (oData === "")) {
+        return null;
+    }
+
+    //Convert to number
+    var number = oData * 1;
+    
+    // Validate
+    if(lang.isNumber(number)) {
+        return number;
+    }
+    else {
+        YAHOO.log("Could not convert data " + lang.dump(oData) + " to type Number", "warn", this.toString());
+        return null;
+    }
+},
+// Backward compatibility
+convertNumber : function(oData) {
+    YAHOO.log("The method YAHOO.util.DataSourceBase.convertNumber() has been" +
+    " deprecated in favor of YAHOO.util.DataSourceBase.parseNumber()", "warn",
+    this.toString());
+    return DS.parseNumber(oData);
+},
+
+/**
+ * Converts data to type Date.
+ *
+ * @method DataSourceBase.parseDate
+ * @param oData {Date | String | Number} Data to convert.
+ * @return {Date} A Date instance.
+ * @static
+ */
+parseDate : function(oData) {
+    var date = null;
+    
+    //Convert to date
+    if(!(oData instanceof Date)) {
+        date = new Date(oData);
+    }
+    else {
+        return oData;
+    }
+    
+    // Validate
+    if(date instanceof Date) {
+        return date;
+    }
+    else {
+        YAHOO.log("Could not convert data " + lang.dump(oData) + " to type Date", "warn", this.toString());
+        return null;
+    }
+},
+// Backward compatibility
+convertDate : function(oData) {
+    YAHOO.log("The method YAHOO.util.DataSourceBase.convertDate() has been" +
+    " deprecated in favor of YAHOO.util.DataSourceBase.parseDate()", "warn",
+    this.toString());
+    return DS.parseDate(oData);
+}
+
+});
+
+// Done in separate step so referenced functions are defined.
+/**
+ * Data parsing functions.
+ * @property DataSource.Parser
+ * @type Object
+ * @static
+ */
+DS.Parser = {
+    string   : DS.parseString,
+    number   : DS.parseNumber,
+    date     : DS.parseDate
+};
+
+// Prototype properties and methods
+DS.prototype = {
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// DataSourceBase private properties
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Name of DataSource instance.
+ *
+ * @property _sName
+ * @type String
+ * @private
+ */
+_sName : null,
+
+/**
+ * Local cache of data result object literals indexed chronologically.
+ *
+ * @property _aCache
+ * @type Object[]
+ * @private
+ */
+_aCache : null,
+
+/**
+ * Local queue of request connections, enabled if queue needs to be managed.
+ *
+ * @property _oQueue
+ * @type Object
+ * @private
+ */
+_oQueue : null,
+
+/**
+ * Array of polling interval IDs that have been enabled, needed to clear all intervals.
+ *
+ * @property _aIntervals
+ * @type Array
+ * @private
+ */
+_aIntervals : null,
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// DataSourceBase public properties
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Max size of the local cache.  Set to 0 to turn off caching.  Caching is
+ * useful to reduce the number of server connections.  Recommended only for data
+ * sources that return comprehensive results for queries or when stale data is
+ * not an issue.
+ *
+ * @property maxCacheEntries
+ * @type Number
+ * @default 0
+ */
+maxCacheEntries : 0,
+
+ /**
+ * Pointer to live database.
+ *
+ * @property liveData
+ * @type Object
+ */
+liveData : null,
+
+/**
+ * Where the live data is held:
+ * 
+ * <dl>  
+ *    <dt>TYPE_UNKNOWN</dt>
+ *    <dt>TYPE_LOCAL</dt>
+ *    <dt>TYPE_XHR</dt>
+ *    <dt>TYPE_SCRIPTNODE</dt>
+ *    <dt>TYPE_JSFUNCTION</dt>
+ * </dl> 
+ *  
+ * @property dataType
+ * @type Number
+ * @default YAHOO.util.DataSourceBase.TYPE_UNKNOWN
+ *
+ */
+dataType : DS.TYPE_UNKNOWN,
+
+/**
+ * Format of response:
+ *  
+ * <dl>  
+ *    <dt>TYPE_UNKNOWN</dt>
+ *    <dt>TYPE_JSARRAY</dt>
+ *    <dt>TYPE_JSON</dt>
+ *    <dt>TYPE_XML</dt>
+ *    <dt>TYPE_TEXT</dt>
+ *    <dt>TYPE_HTMLTABLE</dt> 
+ * </dl> 
+ *
+ * @property responseType
+ * @type Number
+ * @default YAHOO.util.DataSourceBase.TYPE_UNKNOWN
+ */
+responseType : DS.TYPE_UNKNOWN,
+
+/**
+ * Response schema object literal takes a combination of the following properties:
+ *
+ * <dl>
+ * <dt>resultsList</dt> <dd>Pointer to array of tabular data</dd>
+ * <dt>resultNode</dt> <dd>Pointer to node name of row data (XML data only)</dd>
+ * <dt>recordDelim</dt> <dd>Record delimiter (text data only)</dd>
+ * <dt>fieldDelim</dt> <dd>Field delimiter (text data only)</dd>
+ * <dt>fields</dt> <dd>Array of field names (aka keys), or array of object literals
+ * such as: {key:"fieldname",parser:YAHOO.util.DataSourceBase.parseDate}</dd>
+ * <dt>metaFields</dt> <dd>Object literal of keys to include in the oParsedResponse.meta collection</dd>
+ * <dt>metaNode</dt> <dd>Name of the node under which to search for meta information in XML response data</dd>
+ * </dl>
+ *
+ * @property responseSchema
+ * @type Object
+ */
+responseSchema : null,
+
+/**
+ * Additional arguments passed to the JSON parse routine.  The JSON string
+ * is the assumed first argument (where applicable).  This property is not
+ * set by default, but the parse methods will use it if present.
+ *
+ * @property parseJSONArgs
+ * @type {MIXED|Array} If an Array, contents are used as individual arguments.
+ *                     Otherwise, value is used as an additional argument.
+ */
+// property intentionally undefined
+ 
+/**
+ * When working with XML data, setting this property to true enables support for
+ * XPath-syntaxed locators in schema definitions.
+ *
+ * @property useXPath
+ * @type Boolean
+ * @default false
+ */
+useXPath : false,
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// DataSourceBase public methods
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Public accessor to the unique name of the DataSource instance.
+ *
+ * @method toString
+ * @return {String} Unique name of the DataSource instance.
+ */
+toString : function() {
+    return this._sName;
+},
+
+/**
+ * Overridable method passes request to cache and returns cached response if any,
+ * refreshing the hit in the cache as the newest item. Returns null if there is
+ * no cache hit.
+ *
+ * @method getCachedResponse
+ * @param oRequest {Object} Request object.
+ * @param oCallback {Object} Callback object.
+ * @param oCaller {Object} (deprecated) Use callback object.
+ * @return {Object} Cached response object or null.
+ */
+getCachedResponse : function(oRequest, oCallback, oCaller) {
+    var aCache = this._aCache;
+
+    // If cache is enabled...
+    if(this.maxCacheEntries > 0) {        
+        // Initialize local cache
+        if(!aCache) {
+            this._aCache = [];
+            YAHOO.log("Cache initialized", "info", this.toString());
+        }
+        // Look in local cache
+        else {
+            var nCacheLength = aCache.length;
+            if(nCacheLength > 0) {
+                var oResponse = null;
+                this.fireEvent("cacheRequestEvent", {request:oRequest,callback:oCallback,caller:oCaller});
+        
+                // Loop through each cached element
+                for(var i = nCacheLength-1; i >= 0; i--) {
+                    var oCacheElem = aCache[i];
+        
+                    // Defer cache hit logic to a public overridable method
+                    if(this.isCacheHit(oRequest,oCacheElem.request)) {
+                        // The cache returned a hit!
+                        // Grab the cached response
+                        oResponse = oCacheElem.response;
+                        this.fireEvent("cacheResponseEvent", {request:oRequest,response:oResponse,callback:oCallback,caller:oCaller});
+                        
+                        // Refresh the position of the cache hit
+                        if(i < nCacheLength-1) {
+                            // Remove element from its original location
+                            aCache.splice(i,1);
+                            // Add as newest
+                            this.addToCache(oRequest, oResponse);
+                            YAHOO.log("Refreshed cache position of the response for \"" +  oRequest + "\"", "info", this.toString());
+                        }
+                        
+                        // Add a cache flag
+                        oResponse.cached = true;
+                        break;
+                    }
+                }
+                YAHOO.log("The cached response for \"" + lang.dump(oRequest) +
+                        "\" is " + lang.dump(oResponse), "info", this.toString());
+                return oResponse;
+            }
+        }
+    }
+    else if(aCache) {
+        this._aCache = null;
+        YAHOO.log("Cache destroyed", "info", this.toString());
+    }
+    return null;
+},
+
+/**
+ * Default overridable method matches given request to given cached request.
+ * Returns true if is a hit, returns false otherwise.  Implementers should
+ * override this method to customize the cache-matching algorithm.
+ *
+ * @method isCacheHit
+ * @param oRequest {Object} Request object.
+ * @param oCachedRequest {Object} Cached request object.
+ * @return {Boolean} True if given request matches cached request, false otherwise.
+ */
+isCacheHit : function(oRequest, oCachedRequest) {
+    return (oRequest === oCachedRequest);
+},
+
+/**
+ * Adds a new item to the cache. If cache is full, evicts the stalest item
+ * before adding the new item.
+ *
+ * @method addToCache
+ * @param oRequest {Object} Request object.
+ * @param oResponse {Object} Response object to cache.
+ */
+addToCache : function(oRequest, oResponse) {
+    var aCache = this._aCache;
+    if(!aCache) {
+        return;
+    }
+
+    // If the cache is full, make room by removing stalest element (index=0)
+    while(aCache.length >= this.maxCacheEntries) {
+        aCache.shift();
+    }
+
+    // Add to cache in the newest position, at the end of the array
+    var oCacheElem = {request:oRequest,response:oResponse};
+    aCache[aCache.length] = oCacheElem;
+    this.fireEvent("responseCacheEvent", {request:oRequest,response:oResponse});
+    YAHOO.log("Cached the response for \"" +  oRequest + "\"", "info", this.toString());
+},
+
+/**
+ * Flushes cache.
+ *
+ * @method flushCache
+ */
+flushCache : function() {
+    if(this._aCache) {
+        this._aCache = [];
+        this.fireEvent("cacheFlushEvent");
+        YAHOO.log("Flushed the cache", "info", this.toString());
+    }
+},
+
+/**
+ * Sets up a polling mechanism to send requests at set intervals and forward
+ * responses to given callback.
+ *
+ * @method setInterval
+ * @param nMsec {Number} Length of interval in milliseconds.
+ * @param oRequest {Object} Request object.
+ * @param oCallback {Function} Handler function to receive the response.
+ * @param oCaller {Object} (deprecated) Use oCallback.scope.
+ * @return {Number} Interval ID.
+ */
+setInterval : function(nMsec, oRequest, oCallback, oCaller) {
+    if(lang.isNumber(nMsec) && (nMsec >= 0)) {
+        YAHOO.log("Enabling polling to live data for \"" + oRequest + "\" at interval " + nMsec, "info", this.toString());
+        var oSelf = this;
+        var nId = setInterval(function() {
+            oSelf.makeConnection(oRequest, oCallback, oCaller);
+        }, nMsec);
+        this._aIntervals.push(nId);
+        return nId;
+    }
+    else {
+        YAHOO.log("Could not enable polling to live data for \"" + oRequest + "\" at interval " + nMsec, "info", this.toString());
+    }
+},
+
+/**
+ * Disables polling mechanism associated with the given interval ID.
+ *
+ * @method clearInterval
+ * @param nId {Number} Interval ID.
+ */
+clearInterval : function(nId) {
+    // Remove from tracker if there
+    var tracker = this._aIntervals || [];
+    for(var i=tracker.length-1; i>-1; i--) {
+        if(tracker[i] === nId) {
+            tracker.splice(i,1);
+            clearInterval(nId);
+        }
+    }
+},
+
+/**
+ * Disables all known polling intervals.
+ *
+ * @method clearAllIntervals
+ */
+clearAllIntervals : function() {
+    var tracker = this._aIntervals || [];
+    for(var i=tracker.length-1; i>-1; i--) {
+        clearInterval(tracker[i]);
+    }
+    tracker = [];
+},
+
+/**
+ * First looks for cached response, then sends request to live data. The
+ * following arguments are passed to the callback function:
+ *     <dl>
+ *     <dt><code>oRequest</code></dt>
+ *     <dd>The same value that was passed in as the first argument to sendRequest.</dd>
+ *     <dt><code>oParsedResponse</code></dt>
+ *     <dd>An object literal containing the following properties:
+ *         <dl>
+ *         <dt><code>tId</code></dt>
+ *         <dd>Unique transaction ID number.</dd>
+ *         <dt><code>results</code></dt>
+ *         <dd>Schema-parsed data results.</dd>
+ *         <dt><code>error</code></dt>
+ *         <dd>True in cases of data error.</dd>
+ *         <dt><code>cached</code></dt>
+ *         <dd>True when response is returned from DataSource cache.</dd> 
+ *         <dt><code>meta</code></dt>
+ *         <dd>Schema-parsed meta data.</dd>
+ *         </dl>
+ *     <dt><code>oPayload</code></dt>
+ *     <dd>The same value as was passed in as <code>argument</code> in the oCallback object literal.</dd>
+ *     </dl> 
+ *
+ * @method sendRequest
+ * @param oRequest {Object} Request object.
+ * @param oCallback {Object} An object literal with the following properties:
+ *     <dl>
+ *     <dt><code>success</code></dt>
+ *     <dd>The function to call when the data is ready.</dd>
+ *     <dt><code>failure</code></dt>
+ *     <dd>The function to call upon a response failure condition.</dd>
+ *     <dt><code>scope</code></dt>
+ *     <dd>The object to serve as the scope for the success and failure handlers.</dd>
+ *     <dt><code>argument</code></dt>
+ *     <dd>Arbitrary data that will be passed back to the success and failure handlers.</dd>
+ *     </dl> 
+ * @param oCaller {Object} (deprecated) Use oCallback.scope.
+ * @return {Number} Transaction ID, or null if response found in cache.
+ */
+sendRequest : function(oRequest, oCallback, oCaller) {
+    // First look in cache
+    var oCachedResponse = this.getCachedResponse(oRequest, oCallback, oCaller);
+    if(oCachedResponse) {
+        DS.issueCallback(oCallback,[oRequest,oCachedResponse],false,oCaller);
+        return null;
+    }
+
+
+    // Not in cache, so forward request to live data
+    YAHOO.log("Making connection to live data for \"" + oRequest + "\"", "info", this.toString());
+    return this.makeConnection(oRequest, oCallback, oCaller);
+},
+
+/**
+ * Overridable default method generates a unique transaction ID and passes 
+ * the live data reference directly to the  handleResponse function. This
+ * method should be implemented by subclasses to achieve more complex behavior
+ * or to access remote data.          
+ *
+ * @method makeConnection
+ * @param oRequest {Object} Request object.
+ * @param oCallback {Object} Callback object literal.
+ * @param oCaller {Object} (deprecated) Use oCallback.scope.
+ * @return {Number} Transaction ID.
+ */
+makeConnection : function(oRequest, oCallback, oCaller) {
+    var tId = DS._nTransactionId++;
+    this.fireEvent("requestEvent", {tId:tId, request:oRequest,callback:oCallback,caller:oCaller});
+
+    /* accounts for the following cases:
+    YAHOO.util.DataSourceBase.TYPE_UNKNOWN
+    YAHOO.util.DataSourceBase.TYPE_JSARRAY
+    YAHOO.util.DataSourceBase.TYPE_JSON
+    YAHOO.util.DataSourceBase.TYPE_HTMLTABLE
+    YAHOO.util.DataSourceBase.TYPE_XML
+    YAHOO.util.DataSourceBase.TYPE_TEXT
+    */
+    var oRawResponse = this.liveData;
+    
+    this.handleResponse(oRequest, oRawResponse, oCallback, oCaller, tId);
+    return tId;
+},
+
+/**
+ * Receives raw data response and type converts to XML, JSON, etc as necessary.
+ * Forwards oFullResponse to appropriate parsing function to get turned into
+ * oParsedResponse. Calls doBeforeCallback() and adds oParsedResponse to 
+ * the cache when appropriate before calling issueCallback().
+ * 
+ * The oParsedResponse object literal has the following properties:
+ * <dl>
+ *     <dd><dt>tId {Number}</dt> Unique transaction ID</dd>
+ *     <dd><dt>results {Array}</dt> Array of parsed data results</dd>
+ *     <dd><dt>meta {Object}</dt> Object literal of meta values</dd> 
+ *     <dd><dt>error {Boolean}</dt> (optional) True if there was an error</dd>
+ *     <dd><dt>cached {Boolean}</dt> (optional) True if response was cached</dd>
+ * </dl>
+ *
+ * @method handleResponse
+ * @param oRequest {Object} Request object
+ * @param oRawResponse {Object} The raw response from the live database.
+ * @param oCallback {Object} Callback object literal.
+ * @param oCaller {Object} (deprecated) Use oCallback.scope.
+ * @param tId {Number} Transaction ID.
+ */
+handleResponse : function(oRequest, oRawResponse, oCallback, oCaller, tId) {
+    this.fireEvent("responseEvent", {tId:tId, request:oRequest, response:oRawResponse,
+            callback:oCallback, caller:oCaller});
+    YAHOO.log("Received live data response for \"" + oRequest + "\"", "info", this.toString());
+    var xhr = (this.dataType == DS.TYPE_XHR) ? true : false;
+    var oParsedResponse = null;
+    var oFullResponse = oRawResponse;
+    
+    // Try to sniff data type if it has not been defined
+    if(this.responseType === DS.TYPE_UNKNOWN) {
+        var ctype = (oRawResponse && oRawResponse.getResponseHeader) ? oRawResponse.getResponseHeader["Content-Type"] : null;
+        if(ctype) {
+             // xml
+            if(ctype.indexOf("text/xml") > -1) {
+                this.responseType = DS.TYPE_XML;
+            }
+            else if(ctype.indexOf("application/json") > -1) { // json
+                this.responseType = DS.TYPE_JSON;
+            }
+            else if(ctype.indexOf("text/plain") > -1) { // text
+                this.responseType = DS.TYPE_TEXT;
+            }
+        }
+        else {
+            if(YAHOO.lang.isArray(oRawResponse)) { // array
+                this.responseType = DS.TYPE_JSARRAY;
+            }
+             // xml
+            else if(oRawResponse && oRawResponse.nodeType && (oRawResponse.nodeType === 9 || oRawResponse.nodeType === 1 || oRawResponse.nodeType === 11)) {
+                this.responseType = DS.TYPE_XML;
+            }
+            else if(oRawResponse && oRawResponse.nodeName && (oRawResponse.nodeName.toLowerCase() == "table")) { // table
+                this.responseType = DS.TYPE_HTMLTABLE;
+            }    
+            else if(YAHOO.lang.isObject(oRawResponse)) { // json
+                this.responseType = DS.TYPE_JSON;
+            }
+            else if(YAHOO.lang.isString(oRawResponse)) { // text
+                this.responseType = DS.TYPE_TEXT;
+            }
+        }
+    }
+
+    switch(this.responseType) {
+        case DS.TYPE_JSARRAY:
+            if(xhr && oRawResponse && oRawResponse.responseText) {
+                oFullResponse = oRawResponse.responseText; 
+            }
+            try {
+                // Convert to JS array if it's a string
+                if(lang.isString(oFullResponse)) {
+                    var parseArgs = [oFullResponse].concat(this.parseJSONArgs);
+                    // Check for YUI JSON Util
+                    if(lang.JSON) {
+                        oFullResponse = lang.JSON.parse.apply(lang.JSON,parseArgs);
+                    }
+                    // Look for JSON parsers using an API similar to json2.js
+                    else if(window.JSON && JSON.parse) {
+                        oFullResponse = JSON.parse.apply(JSON,parseArgs);
+                    }
+                    // Look for JSON parsers using an API similar to json.js
+                    else if(oFullResponse.parseJSON) {
+                        oFullResponse = oFullResponse.parseJSON.apply(oFullResponse,parseArgs.slice(1));
+                    }
+                    // No JSON lib found so parse the string
+                    else {
+                        // Trim leading spaces
+                        while (oFullResponse.length > 0 &&
+                                (oFullResponse.charAt(0) != "{") &&
+                                (oFullResponse.charAt(0) != "[")) {
+                            oFullResponse = oFullResponse.substring(1, oFullResponse.length);
+                        }
+
+                        if(oFullResponse.length > 0) {
+                            // Strip extraneous stuff at the end
+                            var arrayEnd =
+Math.max(oFullResponse.lastIndexOf("]"),oFullResponse.lastIndexOf("}"));
+                            oFullResponse = oFullResponse.substring(0,arrayEnd+1);
+
+                            // Turn the string into an object literal...
+                            // ...eval is necessary here
+                            oFullResponse = eval("(" + oFullResponse + ")");
+
+                        }
+                    }
+                }
+            }
+            catch(e1) {
+            }
+            oFullResponse = this.doBeforeParseData(oRequest, oFullResponse, oCallback);
+            oParsedResponse = this.parseArrayData(oRequest, oFullResponse);
+            break;
+        case DS.TYPE_JSON:
+            if(xhr && oRawResponse && oRawResponse.responseText) {
+                oFullResponse = oRawResponse.responseText;
+            }
+            try {
+                // Convert to JSON object if it's a string
+                if(lang.isString(oFullResponse)) {
+                    var parseArgs = [oFullResponse].concat(this.parseJSONArgs);
+                    // Check for YUI JSON Util
+                    if(lang.JSON) {
+                        oFullResponse = lang.JSON.parse.apply(lang.JSON,parseArgs);
+                    }
+                    // Look for JSON parsers using an API similar to json2.js
+                    else if(window.JSON && JSON.parse) {
+                        oFullResponse = JSON.parse.apply(JSON,parseArgs);
+                    }
+                    // Look for JSON parsers using an API similar to json.js
+                    else if(oFullResponse.parseJSON) {
+                        oFullResponse = oFullResponse.parseJSON.apply(oFullResponse,parseArgs.slice(1));
+                    }
+                    // No JSON lib found so parse the string
+                    else {
+                        // Trim leading spaces
+                        while (oFullResponse.length > 0 &&
+                                (oFullResponse.charAt(0) != "{") &&
+                                (oFullResponse.charAt(0) != "[")) {
+                            oFullResponse = oFullResponse.substring(1, oFullResponse.length);
+                        }
+    
+                        if(oFullResponse.length > 0) {
+                            // Strip extraneous stuff at the end
+                            var objEnd = Math.max(oFullResponse.lastIndexOf("]"),oFullResponse.lastIndexOf("}"));
+                            oFullResponse = oFullResponse.substring(0,objEnd+1);
+    
+                            // Turn the string into an object literal...
+                            // ...eval is necessary here
+                            oFullResponse = eval("(" + oFullResponse + ")");
+    
+                        }
+                    }
+                }
+            }
+            catch(e) {
+            }
+
+            oFullResponse = this.doBeforeParseData(oRequest, oFullResponse, oCallback);
+            oParsedResponse = this.parseJSONData(oRequest, oFullResponse);
+            break;
+        case DS.TYPE_HTMLTABLE:
+            if(xhr && oRawResponse.responseText) {
+                var el = document.createElement('div');
+                el.innerHTML = oRawResponse.responseText;
+                oFullResponse = el.getElementsByTagName('table')[0];
+            }
+            oFullResponse = this.doBeforeParseData(oRequest, oFullResponse, oCallback);
+            oParsedResponse = this.parseHTMLTableData(oRequest, oFullResponse);
+            break;
+        case DS.TYPE_XML:
+            if(xhr && oRawResponse.responseXML) {
+                oFullResponse = oRawResponse.responseXML;
+            }
+            oFullResponse = this.doBeforeParseData(oRequest, oFullResponse, oCallback);
+            oParsedResponse = this.parseXMLData(oRequest, oFullResponse);
+            break;
+        case DS.TYPE_TEXT:
+            if(xhr && lang.isString(oRawResponse.responseText)) {
+                oFullResponse = oRawResponse.responseText;
+            }
+            oFullResponse = this.doBeforeParseData(oRequest, oFullResponse, oCallback);
+            oParsedResponse = this.parseTextData(oRequest, oFullResponse);
+            break;
+        default:
+            oFullResponse = this.doBeforeParseData(oRequest, oFullResponse, oCallback);
+            oParsedResponse = this.parseData(oRequest, oFullResponse);
+            break;
+    }
+
+
+    // Clean up for consistent signature
+    oParsedResponse = oParsedResponse || {};
+    if(!oParsedResponse.results) {
+        oParsedResponse.results = [];
+    }
+    if(!oParsedResponse.meta) {
+        oParsedResponse.meta = {};
+    }
+
+    // Success
+    if(!oParsedResponse.error) {
+        // Last chance to touch the raw response or the parsed response
+        oParsedResponse = this.doBeforeCallback(oRequest, oFullResponse, oParsedResponse, oCallback);
+        this.fireEvent("responseParseEvent", {request:oRequest,
+                response:oParsedResponse, callback:oCallback, caller:oCaller});
+        // Cache the response
+        this.addToCache(oRequest, oParsedResponse);
+    }
+    // Error
+    else {
+        // Be sure the error flag is on
+        oParsedResponse.error = true;
+        this.fireEvent("dataErrorEvent", {request:oRequest, response: oRawResponse, callback:oCallback, 
+                caller:oCaller, message:DS.ERROR_DATANULL});
+        YAHOO.log(DS.ERROR_DATANULL, "error", this.toString());
+    }
+
+    // Send the response back to the caller
+    oParsedResponse.tId = tId;
+    DS.issueCallback(oCallback,[oRequest,oParsedResponse],oParsedResponse.error,oCaller);
+},
+
+/**
+ * Overridable method gives implementers access to the original full response
+ * before the data gets parsed. Implementers should take care not to return an
+ * unparsable or otherwise invalid response.
+ *
+ * @method doBeforeParseData
+ * @param oRequest {Object} Request object.
+ * @param oFullResponse {Object} The full response from the live database.
+ * @param oCallback {Object} The callback object.  
+ * @return {Object} Full response for parsing.
+  
+ */
+doBeforeParseData : function(oRequest, oFullResponse, oCallback) {
+    return oFullResponse;
+},
+
+/**
+ * Overridable method gives implementers access to the original full response and
+ * the parsed response (parsed against the given schema) before the data
+ * is added to the cache (if applicable) and then sent back to callback function.
+ * This is your chance to access the raw response and/or populate the parsed
+ * response with any custom data.
+ *
+ * @method doBeforeCallback
+ * @param oRequest {Object} Request object.
+ * @param oFullResponse {Object} The full response from the live database.
+ * @param oParsedResponse {Object} The parsed response to return to calling object.
+ * @param oCallback {Object} The callback object. 
+ * @return {Object} Parsed response object.
+ */
+doBeforeCallback : function(oRequest, oFullResponse, oParsedResponse, oCallback) {
+    return oParsedResponse;
+},
+
+/**
+ * Overridable method parses data of generic RESPONSE_TYPE into a response object.
+ *
+ * @method parseData
+ * @param oRequest {Object} Request object.
+ * @param oFullResponse {Object} The full Array from the live database.
+ * @return {Object} Parsed response object with the following properties:<br>
+ *     - results {Array} Array of parsed data results<br>
+ *     - meta {Object} Object literal of meta values<br>
+ *     - error {Boolean} (optional) True if there was an error<br>
+ */
+parseData : function(oRequest, oFullResponse) {
+    if(lang.isValue(oFullResponse)) {
+        var oParsedResponse = {results:oFullResponse,meta:{}};
+        YAHOO.log("Parsed generic data is " +
+                lang.dump(oParsedResponse), "info", this.toString());
+        return oParsedResponse;
+
+    }
+    YAHOO.log("Generic data could not be parsed: " + lang.dump(oFullResponse), 
+            "error", this.toString());
+    return null;
+},
+
+/**
+ * Overridable method parses Array data into a response object.
+ *
+ * @method parseArrayData
+ * @param oRequest {Object} Request object.
+ * @param oFullResponse {Object} The full Array from the live database.
+ * @return {Object} Parsed response object with the following properties:<br>
+ *     - results (Array) Array of parsed data results<br>
+ *     - error (Boolean) True if there was an error
+ */
+parseArrayData : function(oRequest, oFullResponse) {
+    if(lang.isArray(oFullResponse)) {
+        var results = [],
+            i, j,
+            rec, field, data;
+        
+        // Parse for fields
+        if(lang.isArray(this.responseSchema.fields)) {
+            var fields = this.responseSchema.fields;
+            for (i = fields.length - 1; i >= 0; --i) {
+                if (typeof fields[i] !== 'object') {
+                    fields[i] = { key : fields[i] };
+                }
+            }
+
+            var parsers = {}, p;
+            for (i = fields.length - 1; i >= 0; --i) {
+                p = (typeof fields[i].parser === 'function' ?
+                          fields[i].parser :
+                          DS.Parser[fields[i].parser+'']) || fields[i].converter;
+                if (p) {
+                    parsers[fields[i].key] = p;
+                }
+            }
+
+            var arrType = lang.isArray(oFullResponse[0]);
+            for(i=oFullResponse.length-1; i>-1; i--) {
+                var oResult = {};
+                rec = oFullResponse[i];
+                if (typeof rec === 'object') {
+                    for(j=fields.length-1; j>-1; j--) {
+                        field = fields[j];
+                        data = arrType ? rec[j] : rec[field.key];
+
+                        if (parsers[field.key]) {
+                            data = parsers[field.key].call(this,data);
+                        }
+
+                        // Safety measure
+                        if(data === undefined) {
+                            data = null;
+                        }
+
+                        oResult[field.key] = data;
+                    }
+                }
+                else if (lang.isString(rec)) {
+                    for(j=fields.length-1; j>-1; j--) {
+                        field = fields[j];
+                        data = rec;
+
+                        if (parsers[field.key]) {
+                            data = parsers[field.key].call(this,data);
+                        }
+
+                        // Safety measure
+                        if(data === undefined) {
+                            data = null;
+                        }
+
+                        oResult[field.key] = data;
+                    }                
+                }
+                results[i] = oResult;
+            }    
+        }
+        // Return entire data set
+        else {
+            results = oFullResponse;
+        }
+        var oParsedResponse = {results:results};
+        YAHOO.log("Parsed array data is " +
+                lang.dump(oParsedResponse), "info", this.toString());
+        return oParsedResponse;
+
+    }
+    YAHOO.log("Array data could not be parsed: " + lang.dump(oFullResponse), 
+            "error", this.toString());
+    return null;
+},
+
+/**
+ * Overridable method parses plain text data into a response object.
+ *
+ * @method parseTextData
+ * @param oRequest {Object} Request object.
+ * @param oFullResponse {Object} The full text response from the live database.
+ * @return {Object} Parsed response object with the following properties:<br>
+ *     - results (Array) Array of parsed data results<br>
+ *     - error (Boolean) True if there was an error
+ */
+parseTextData : function(oRequest, oFullResponse) {
+    if(lang.isString(oFullResponse)) {
+        if(lang.isString(this.responseSchema.recordDelim) &&
+                lang.isString(this.responseSchema.fieldDelim)) {
+            var oParsedResponse = {results:[]};
+            var recDelim = this.responseSchema.recordDelim;
+            var fieldDelim = this.responseSchema.fieldDelim;
+            if(oFullResponse.length > 0) {
+                // Delete the last line delimiter at the end of the data if it exists
+                var newLength = oFullResponse.length-recDelim.length;
+                if(oFullResponse.substr(newLength) == recDelim) {
+                    oFullResponse = oFullResponse.substr(0, newLength);
+                }
+                if(oFullResponse.length > 0) {
+                    // Split along record delimiter to get an array of strings
+                    var recordsarray = oFullResponse.split(recDelim);
+                    // Cycle through each record
+                    for(var i = 0, len = recordsarray.length, recIdx = 0; i < len; ++i) {
+                        var bError = false,
+                            sRecord = recordsarray[i];
+                        if (lang.isString(sRecord) && (sRecord.length > 0)) {
+                            // Split each record along field delimiter to get data
+                            var fielddataarray = recordsarray[i].split(fieldDelim);
+                            var oResult = {};
+                            
+                            // Filter for fields data
+                            if(lang.isArray(this.responseSchema.fields)) {
+                                var fields = this.responseSchema.fields;
+                                for(var j=fields.length-1; j>-1; j--) {
+                                    try {
+                                        // Remove quotation marks from edges, if applicable
+                                        var data = fielddataarray[j];
+                                        if (lang.isString(data)) {
+                                            if(data.charAt(0) == "\"") {
+                                                data = data.substr(1);
+                                            }
+                                            if(data.charAt(data.length-1) == "\"") {
+                                                data = data.substr(0,data.length-1);
+                                            }
+                                            var field = fields[j];
+                                            var key = (lang.isValue(field.key)) ? field.key : field;
+                                            // Backward compatibility
+                                            if(!field.parser && field.converter) {
+                                                field.parser = field.converter;
+                                                YAHOO.log("The field property converter has been deprecated" +
+                                                        " in favor of parser", "warn", this.toString());
+                                            }
+                                            var parser = (typeof field.parser === 'function') ?
+                                                field.parser :
+                                                DS.Parser[field.parser+''];
+                                            if(parser) {
+                                                data = parser.call(this, data);
+                                            }
+                                            // Safety measure
+                                            if(data === undefined) {
+                                                data = null;
+                                            }
+                                            oResult[key] = data;
+                                        }
+                                        else {
+                                            bError = true;
+                                        }
+                                    }
+                                    catch(e) {
+                                        bError = true;
+                                    }
+                                }
+                            }            
+                            // No fields defined so pass along all data as an array
+                            else {
+                                oResult = fielddataarray;
+                            }
+                            if(!bError) {
+                                oParsedResponse.results[recIdx++] = oResult;
+                            }
+                        }
+                    }
+                }
+            }
+            YAHOO.log("Parsed text data is " +
+                    lang.dump(oParsedResponse), "info", this.toString());
+            return oParsedResponse;
+        }
+    }
+    YAHOO.log("Text data could not be parsed: " + lang.dump(oFullResponse), 
+            "error", this.toString());
+    return null;
+            
+},
+
+/**
+ * Overridable method parses XML data for one result into an object literal.
+ *
+ * @method parseXMLResult
+ * @param result {XML} XML for one result.
+ * @return {Object} Object literal of data for one result.
+ */
+parseXMLResult : function(result) {
+    var oResult = {},
+        schema = this.responseSchema;
+        
+    try {
+        // Loop through each data field in each result using the schema
+        for(var m = schema.fields.length-1; m >= 0 ; m--) {
+            var field = schema.fields[m];
+            var key = (lang.isValue(field.key)) ? field.key : field;
+            var data = null;
+
+            if(this.useXPath) {
+                data = YAHOO.util.DataSource._getLocationValue(field, result);
+            }
+            else {
+                // Values may be held in an attribute...
+                var xmlAttr = result.attributes.getNamedItem(key);
+                if(xmlAttr) {
+                    data = xmlAttr.value;
+                }
+                // ...or in a node
+                else {
+                    var xmlNode = result.getElementsByTagName(key);
+                    if(xmlNode && xmlNode.item(0)) {
+                        var item = xmlNode.item(0);
+                        // For IE, then DOM...
+                        data = (item) ? ((item.text) ? item.text : (item.textContent) ? item.textContent : null) : null;
+                        // ...then fallback, but check for multiple child nodes
+                        if(!data) {
+                            var datapieces = [];
+                            for(var j=0, len=item.childNodes.length; j<len; j++) {
+                                if(item.childNodes[j].nodeValue) {
+                                    datapieces[datapieces.length] = item.childNodes[j].nodeValue;
+                                }
+                            }
+                            if(datapieces.length > 0) {
+                                data = datapieces.join("");
+                            }
+                        }
+                    }
+                }
+            }
+            
+            
+            // Safety net
+            if(data === null) {
+                   data = "";
+            }
+            // Backward compatibility
+            if(!field.parser && field.converter) {
+                field.parser = field.converter;
+                YAHOO.log("The field property converter has been deprecated" +
+                        " in favor of parser", "warn", this.toString());
+            }
+            var parser = (typeof field.parser === 'function') ?
+                field.parser :
+                DS.Parser[field.parser+''];
+            if(parser) {
+                data = parser.call(this, data);
+            }
+            // Safety measure
+            if(data === undefined) {
+                data = null;
+            }
+            oResult[key] = data;
+        }
+    }
+    catch(e) {
+        YAHOO.log("Error while parsing XML result: " + e.message);
+    }
+
+    return oResult;
+},
+
+
+
+/**
+ * Overridable method parses XML data into a response object.
+ *
+ * @method parseXMLData
+ * @param oRequest {Object} Request object.
+ * @param oFullResponse {Object} The full XML response from the live database.
+ * @return {Object} Parsed response object with the following properties<br>
+ *     - results (Array) Array of parsed data results<br>
+ *     - error (Boolean) True if there was an error
+ */
+parseXMLData : function(oRequest, oFullResponse) {
+    var bError = false,
+        schema = this.responseSchema,
+        oParsedResponse = {meta:{}},
+        xmlList = null,
+        metaNode      = schema.metaNode,
+        metaLocators  = schema.metaFields || {},
+        i,k,loc,v;
+
+    // In case oFullResponse is something funky
+    try {
+        // Pull any meta identified
+        if(this.useXPath) {
+            for (k in metaLocators) {
+                oParsedResponse.meta[k] = YAHOO.util.DataSource._getLocationValue(metaLocators[k], oFullResponse);
+            }
+        }
+        else {
+            metaNode = metaNode ? oFullResponse.getElementsByTagName(metaNode)[0] :
+                       oFullResponse;
+
+            if (metaNode) {
+                for (k in metaLocators) {
+                    if (lang.hasOwnProperty(metaLocators, k)) {
+                        loc = metaLocators[k];
+                        // Look for a node
+                        v = metaNode.getElementsByTagName(loc)[0];
+
+                        if (v) {
+                            v = v.firstChild.nodeValue;
+                        } else {
+                            // Look for an attribute
+                            v = metaNode.attributes.getNamedItem(loc);
+                            if (v) {
+                                v = v.value;
+                            }
+                        }
+
+                        if (lang.isValue(v)) {
+                            oParsedResponse.meta[k] = v;
+                        }
+                    }
+                }
+            }
+        }
+        
+        // For result data
+        xmlList = (schema.resultNode) ?
+            oFullResponse.getElementsByTagName(schema.resultNode) :
+            null;
+    }
+    catch(e) {
+        YAHOO.log("Error while parsing XML data: " + e.message);
+    }
+    if(!xmlList || !lang.isArray(schema.fields)) {
+        bError = true;
+    }
+    // Loop through each result
+    else {
+        oParsedResponse.results = [];
+        for(i = xmlList.length-1; i >= 0 ; --i) {
+            var oResult = this.parseXMLResult(xmlList.item(i));
+            // Capture each array of values into an array of results
+            oParsedResponse.results[i] = oResult;
+        }
+    }
+    if(bError) {
+        YAHOO.log("XML data could not be parsed: " +
+                lang.dump(oFullResponse), "error", this.toString());
+        oParsedResponse.error = true;
+    }
+    else {
+        YAHOO.log("Parsed XML data is " +
+                lang.dump(oParsedResponse), "info", this.toString());
+    }
+    return oParsedResponse;
+},
+
+/**
+ * Overridable method parses JSON data into a response object.
+ *
+ * @method parseJSONData
+ * @param oRequest {Object} Request object.
+ * @param oFullResponse {Object} The full JSON from the live database.
+ * @return {Object} Parsed response object with the following properties<br>
+ *     - results (Array) Array of parsed data results<br>
+ *     - error (Boolean) True if there was an error
+ */
+parseJSONData : function(oRequest, oFullResponse) {
+    var oParsedResponse = {results:[],meta:{}};
+    
+    if(lang.isObject(oFullResponse) && this.responseSchema.resultsList) {
+        var schema = this.responseSchema,
+            fields          = schema.fields,
+            resultsList     = oFullResponse,
+            results         = [],
+            metaFields      = schema.metaFields || {},
+            fieldParsers    = [],
+            fieldPaths      = [],
+            simpleFields    = [],
+            bError          = false,
+            i,len,j,v,key,parser,path;
+
+        // Function to convert the schema's fields into walk paths
+        var buildPath = function (needle) {
+            var path = null, keys = [], i = 0;
+            if (needle) {
+                // Strip the ["string keys"] and [1] array indexes
+                needle = needle.
+                    replace(/\[(['"])(.*?)\1\]/g,
+                    function (x,$1,$2) {keys[i]=$2;return '.@'+(i++);}).
+                    replace(/\[(\d+)\]/g,
+                    function (x,$1) {keys[i]=parseInt($1,10)|0;return '.@'+(i++);}).
+                    replace(/^\./,''); // remove leading dot
+
+                // If the cleaned needle contains invalid characters, the
+                // path is invalid
+                if (!/[^\w\.\$@]/.test(needle)) {
+                    path = needle.split('.');
+                    for (i=path.length-1; i >= 0; --i) {
+                        if (path[i].charAt(0) === '@') {
+                            path[i] = keys[parseInt(path[i].substr(1),10)];
+                        }
+                    }
+                }
+                else {
+                    YAHOO.log("Invalid locator: " + needle, "error", this.toString());
+                }
+            }
+            return path;
+        };
+
+
+        // Function to walk a path and return the pot of gold
+        var walkPath = function (path, origin) {
+            var v=origin,i=0,len=path.length;
+            for (;i<len && v;++i) {
+                v = v[path[i]];
+            }
+            return v;
+        };
+
+        // Parse the response
+        // Step 1. Pull the resultsList from oFullResponse (default assumes
+        // oFullResponse IS the resultsList)
+        path = buildPath(schema.resultsList);
+        if (path) {
+            resultsList = walkPath(path, oFullResponse);
+            if (resultsList === undefined) {
+                bError = true;
+            }
+        } else {
+            bError = true;
+        }
+        
+        if (!resultsList) {
+            resultsList = [];
+        }
+
+        if (!lang.isArray(resultsList)) {
+            resultsList = [resultsList];
+        }
+
+        if (!bError) {
+            // Step 2. Parse out field data if identified
+            if(schema.fields) {
+                var field;
+                // Build the field parser map and location paths
+                for (i=0, len=fields.length; i<len; i++) {
+                    field = fields[i];
+                    key    = field.key || field;
+                    parser = ((typeof field.parser === 'function') ?
+                        field.parser :
+                        DS.Parser[field.parser+'']) || field.converter;
+                    path   = buildPath(key);
+    
+                    if (parser) {
+                        fieldParsers[fieldParsers.length] = {key:key,parser:parser};
+                    }
+    
+                    if (path) {
+                        if (path.length > 1) {
+                            fieldPaths[fieldPaths.length] = {key:key,path:path};
+                        } else {
+                            simpleFields[simpleFields.length] = {key:key,path:path[0]};
+                        }
+                    } else {
+                        YAHOO.log("Invalid key syntax: " + key,"warn",this.toString());
+                    }
+                }
+
+                // Process the results, flattening the records and/or applying parsers if needed
+                for (i = resultsList.length - 1; i >= 0; --i) {
+                    var r = resultsList[i], rec = {};
+                    if(r) {
+                        for (j = simpleFields.length - 1; j >= 0; --j) {
+                            // Bug 1777850: data might be held in an array
+                            rec[simpleFields[j].key] =
+                                    (r[simpleFields[j].path] !== undefined) ?
+                                    r[simpleFields[j].path] : r[j];
+                        }
+
+                        for (j = fieldPaths.length - 1; j >= 0; --j) {
+                            rec[fieldPaths[j].key] = walkPath(fieldPaths[j].path,r);
+                        }
+
+                        for (j = fieldParsers.length - 1; j >= 0; --j) {
+                            var p = fieldParsers[j].key;
+                            rec[p] = fieldParsers[j].parser(rec[p]);
+                            if (rec[p] === undefined) {
+                                rec[p] = null;
+                            }
+                        }
+                    }
+                    results[i] = rec;
+                }
+            }
+            else {
+                results = resultsList;
+            }
+
+            for (key in metaFields) {
+                if (lang.hasOwnProperty(metaFields,key)) {
+                    path = buildPath(metaFields[key]);
+                    if (path) {
+                        v = walkPath(path, oFullResponse);
+                        oParsedResponse.meta[key] = v;
+                    }
+                }
+            }
+
+        } else {
+            YAHOO.log("JSON data could not be parsed due to invalid responseSchema.resultsList or invalid response: " +
+                    lang.dump(oFullResponse), "error", this.toString());
+
+            oParsedResponse.error = true;
+        }
+
+        oParsedResponse.results = results;
+    }
+    else {
+        YAHOO.log("JSON data could not be parsed: " +
+                lang.dump(oFullResponse), "error", this.toString());
+        oParsedResponse.error = true;
+    }
+
+    return oParsedResponse;
+},
+
+/**
+ * Overridable method parses an HTML TABLE element reference into a response object.
+ * Data is parsed out of TR elements from all TBODY elements. 
+ *
+ * @method parseHTMLTableData
+ * @param oRequest {Object} Request object.
+ * @param oFullResponse {Object} The full HTML element reference from the live database.
+ * @return {Object} Parsed response object with the following properties<br>
+ *     - results (Array) Array of parsed data results<br>
+ *     - error (Boolean) True if there was an error
+ */
+parseHTMLTableData : function(oRequest, oFullResponse) {
+    var bError = false;
+    var elTable = oFullResponse;
+    var fields = this.responseSchema.fields;
+    var oParsedResponse = {results:[]};
+
+    if(lang.isArray(fields)) {
+        // Iterate through each TBODY
+        for(var i=0; i<elTable.tBodies.length; i++) {
+            var elTbody = elTable.tBodies[i];
+    
+            // Iterate through each TR
+            for(var j=elTbody.rows.length-1; j>-1; j--) {
+                var elRow = elTbody.rows[j];
+                var oResult = {};
+                
+                for(var k=fields.length-1; k>-1; k--) {
+                    var field = fields[k];
+                    var key = (lang.isValue(field.key)) ? field.key : field;
+                    var data = elRow.cells[k].innerHTML;
+    
+                    // Backward compatibility
+                    if(!field.parser && field.converter) {
+                        field.parser = field.converter;
+                        YAHOO.log("The field property converter has been deprecated" +
+                                " in favor of parser", "warn", this.toString());
+                    }
+                    var parser = (typeof field.parser === 'function') ?
+                        field.parser :
+                        DS.Parser[field.parser+''];
+                    if(parser) {
+                        data = parser.call(this, data);
+                    }
+                    // Safety measure
+                    if(data === undefined) {
+                        data = null;
+                    }
+                    oResult[key] = data;
+                }
+                oParsedResponse.results[j] = oResult;
+            }
+        }
+    }
+    else {
+        bError = true;
+        YAHOO.log("Invalid responseSchema.fields", "error", this.toString());
+    }
+
+    if(bError) {
+        YAHOO.log("HTML TABLE data could not be parsed: " +
+                lang.dump(oFullResponse), "error", this.toString());
+        oParsedResponse.error = true;
+    }
+    else {
+        YAHOO.log("Parsed HTML TABLE data is " +
+                lang.dump(oParsedResponse), "info", this.toString());
+    }
+    return oParsedResponse;
+}
+
+};
+
+// DataSourceBase uses EventProvider
+lang.augmentProto(DS, util.EventProvider);
+
+
+
+/****************************************************************************/
+/****************************************************************************/
+/****************************************************************************/
+
+/**
+ * LocalDataSource class for in-memory data structs including JavaScript arrays,
+ * JavaScript object literals (JSON), XML documents, and HTML tables.
+ *
+ * @namespace YAHOO.util
+ * @class YAHOO.util.LocalDataSource
+ * @extends YAHOO.util.DataSourceBase 
+ * @constructor
+ * @param oLiveData {HTMLElement}  Pointer to live data.
+ * @param oConfigs {object} (optional) Object literal of configuration values.
+ */
+util.LocalDataSource = function(oLiveData, oConfigs) {
+    this.dataType = DS.TYPE_LOCAL;
+    
+    if(oLiveData) {
+        if(YAHOO.lang.isArray(oLiveData)) { // array
+            this.responseType = DS.TYPE_JSARRAY;
+        }
+         // xml
+        else if(oLiveData.nodeType && oLiveData.nodeType == 9) {
+            this.responseType = DS.TYPE_XML;
+        }
+        else if(oLiveData.nodeName && (oLiveData.nodeName.toLowerCase() == "table")) { // table
+            this.responseType = DS.TYPE_HTMLTABLE;
+            oLiveData = oLiveData.cloneNode(true);
+        }    
+        else if(YAHOO.lang.isString(oLiveData)) { // text
+            this.responseType = DS.TYPE_TEXT;
+        }
+        else if(YAHOO.lang.isObject(oLiveData)) { // json
+            this.responseType = DS.TYPE_JSON;
+        }
+    }
+    else {
+        oLiveData = [];
+        this.responseType = DS.TYPE_JSARRAY;
+    }
+    
+    util.LocalDataSource.superclass.constructor.call(this, oLiveData, oConfigs); 
+};
+
+// LocalDataSource extends DataSourceBase
+lang.extend(util.LocalDataSource, DS);
+
+// Copy static members to LocalDataSource class
+lang.augmentObject(util.LocalDataSource, DS);
+
+
+
+
+
+
+
+
+
+
+
+
+
+/****************************************************************************/
+/****************************************************************************/
+/****************************************************************************/
+
+/**
+ * FunctionDataSource class for JavaScript functions.
+ *
+ * @namespace YAHOO.util
+ * @class YAHOO.util.FunctionDataSource
+ * @extends YAHOO.util.DataSourceBase  
+ * @constructor
+ * @param oLiveData {HTMLElement}  Pointer to live data.
+ * @param oConfigs {object} (optional) Object literal of configuration values.
+ */
+util.FunctionDataSource = function(oLiveData, oConfigs) {
+    this.dataType = DS.TYPE_JSFUNCTION;
+    oLiveData = oLiveData || function() {};
+    
+    util.FunctionDataSource.superclass.constructor.call(this, oLiveData, oConfigs); 
+};
+
+// FunctionDataSource extends DataSourceBase
+lang.extend(util.FunctionDataSource, DS, {
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// FunctionDataSource public properties
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Context in which to execute the function. By default, is the DataSource
+ * instance itself. If set, the function will receive the DataSource instance
+ * as an additional argument. 
+ *
+ * @property scope
+ * @type Object
+ * @default null
+ */
+scope : null,
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// FunctionDataSource public methods
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Overriding method passes query to a function. The returned response is then
+ * forwarded to the handleResponse function.
+ *
+ * @method makeConnection
+ * @param oRequest {Object} Request object.
+ * @param oCallback {Object} Callback object literal.
+ * @param oCaller {Object} (deprecated) Use oCallback.scope.
+ * @return {Number} Transaction ID.
+ */
+makeConnection : function(oRequest, oCallback, oCaller) {
+    var tId = DS._nTransactionId++;
+    this.fireEvent("requestEvent", {tId:tId,request:oRequest,callback:oCallback,caller:oCaller});
+
+    // Pass the request in as a parameter and
+    // forward the return value to the handler
+    
+    
+    var oRawResponse = (this.scope) ? this.liveData.call(this.scope, oRequest, this) : this.liveData(oRequest);
+    
+    // Try to sniff data type if it has not been defined
+    if(this.responseType === DS.TYPE_UNKNOWN) {
+        if(YAHOO.lang.isArray(oRawResponse)) { // array
+            this.responseType = DS.TYPE_JSARRAY;
+        }
+         // xml
+        else if(oRawResponse && oRawResponse.nodeType && oRawResponse.nodeType == 9) {
+            this.responseType = DS.TYPE_XML;
+        }
+        else if(oRawResponse && oRawResponse.nodeName && (oRawResponse.nodeName.toLowerCase() == "table")) { // table
+            this.responseType = DS.TYPE_HTMLTABLE;
+        }    
+        else if(YAHOO.lang.isObject(oRawResponse)) { // json
+            this.responseType = DS.TYPE_JSON;
+        }
+        else if(YAHOO.lang.isString(oRawResponse)) { // text
+            this.responseType = DS.TYPE_TEXT;
+        }
+    }
+
+    this.handleResponse(oRequest, oRawResponse, oCallback, oCaller, tId);
+    return tId;
+}
+
+});
+
+// Copy static members to FunctionDataSource class
+lang.augmentObject(util.FunctionDataSource, DS);
+
+
+
+
+
+
+
+
+
+
+
+
+
+/****************************************************************************/
+/****************************************************************************/
+/****************************************************************************/
+
+/**
+ * ScriptNodeDataSource class for accessing remote data via the YUI Get Utility. 
+ *
+ * @namespace YAHOO.util
+ * @class YAHOO.util.ScriptNodeDataSource
+ * @extends YAHOO.util.DataSourceBase  
+ * @constructor
+ * @param oLiveData {HTMLElement}  Pointer to live data.
+ * @param oConfigs {object} (optional) Object literal of configuration values.
+ */
+util.ScriptNodeDataSource = function(oLiveData, oConfigs) {
+    this.dataType = DS.TYPE_SCRIPTNODE;
+    oLiveData = oLiveData || "";
+    
+    util.ScriptNodeDataSource.superclass.constructor.call(this, oLiveData, oConfigs); 
+};
+
+// ScriptNodeDataSource extends DataSourceBase
+lang.extend(util.ScriptNodeDataSource, DS, {
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// ScriptNodeDataSource public properties
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Alias to YUI Get Utility, to allow implementers to use a custom class.
+ *
+ * @property getUtility
+ * @type Object
+ * @default YAHOO.util.Get
+ */
+getUtility : util.Get,
+
+/**
+ * Defines request/response management in the following manner:
+ * <dl>
+ *     <!--<dt>queueRequests</dt>
+ *     <dd>If a request is already in progress, wait until response is returned before sending the next request.</dd>
+ *     <dt>cancelStaleRequests</dt>
+ *     <dd>If a request is already in progress, cancel it before sending the next request.</dd>-->
+ *     <dt>ignoreStaleResponses</dt>
+ *     <dd>Send all requests, but handle only the response for the most recently sent request.</dd>
+ *     <dt>allowAll</dt>
+ *     <dd>Send all requests and handle all responses.</dd>
+ * </dl>
+ *
+ * @property asyncMode
+ * @type String
+ * @default "allowAll"
+ */
+asyncMode : "allowAll",
+
+/**
+ * Callback string parameter name sent to the remote script. By default,
+ * requests are sent to
+ * &#60;URI&#62;?&#60;scriptCallbackParam&#62;=callbackFunction
+ *
+ * @property scriptCallbackParam
+ * @type String
+ * @default "callback"
+ */
+scriptCallbackParam : "callback",
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// ScriptNodeDataSource public methods
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Creates a request callback that gets appended to the script URI. Implementers
+ * can customize this string to match their server's query syntax.
+ *
+ * @method generateRequestCallback
+ * @return {String} String fragment that gets appended to script URI that 
+ * specifies the callback function 
+ */
+generateRequestCallback : function(id) {
+    return "&" + this.scriptCallbackParam + "=YAHOO.util.ScriptNodeDataSource.callbacks["+id+"]" ;
+},
+
+/**
+ * Overridable method gives implementers access to modify the URI before the dynamic
+ * script node gets inserted. Implementers should take care not to return an
+ * invalid URI.
+ *
+ * @method doBeforeGetScriptNode
+ * @param {String} URI to the script 
+ * @return {String} URI to the script
+ */
+doBeforeGetScriptNode : function(sUri) {
+    return sUri;
+},
+
+/**
+ * Overriding method passes query to Get Utility. The returned
+ * response is then forwarded to the handleResponse function.
+ *
+ * @method makeConnection
+ * @param oRequest {Object} Request object.
+ * @param oCallback {Object} Callback object literal.
+ * @param oCaller {Object} (deprecated) Use oCallback.scope.
+ * @return {Number} Transaction ID.
+ */
+makeConnection : function(oRequest, oCallback, oCaller) {
+    var tId = DS._nTransactionId++;
+    this.fireEvent("requestEvent", {tId:tId,request:oRequest,callback:oCallback,caller:oCaller});
+    
+    // If there are no global pending requests, it is safe to purge global callback stack and global counter
+    if(util.ScriptNodeDataSource._nPending === 0) {
+        util.ScriptNodeDataSource.callbacks = [];
+        util.ScriptNodeDataSource._nId = 0;
+    }
+    
+    // ID for this request
+    var id = util.ScriptNodeDataSource._nId;
+    util.ScriptNodeDataSource._nId++;
+    
+    // Dynamically add handler function with a closure to the callback stack
+    var oSelf = this;
+    util.ScriptNodeDataSource.callbacks[id] = function(oRawResponse) {
+        if((oSelf.asyncMode !== "ignoreStaleResponses")||
+                (id === util.ScriptNodeDataSource.callbacks.length-1)) { // Must ignore stale responses
+                
+            // Try to sniff data type if it has not been defined
+            if(oSelf.responseType === DS.TYPE_UNKNOWN) {
+                if(YAHOO.lang.isArray(oRawResponse)) { // array
+                    oSelf.responseType = DS.TYPE_JSARRAY;
+                }
+                 // xml
+                else if(oRawResponse.nodeType && oRawResponse.nodeType == 9) {
+                    oSelf.responseType = DS.TYPE_XML;
+                }
+                else if(oRawResponse.nodeName && (oRawResponse.nodeName.toLowerCase() == "table")) { // table
+                    oSelf.responseType = DS.TYPE_HTMLTABLE;
+                }    
+                else if(YAHOO.lang.isObject(oRawResponse)) { // json
+                    oSelf.responseType = DS.TYPE_JSON;
+                }
+                else if(YAHOO.lang.isString(oRawResponse)) { // text
+                    oSelf.responseType = DS.TYPE_TEXT;
+                }
+            }
+
+            oSelf.handleResponse(oRequest, oRawResponse, oCallback, oCaller, tId);
+        }
+        else {
+            YAHOO.log("DataSource ignored stale response for tId " + tId + "(" + oRequest + ")", "info", oSelf.toString());
+        }
+    
+        delete util.ScriptNodeDataSource.callbacks[id];
+    };
+    
+    // We are now creating a request
+    util.ScriptNodeDataSource._nPending++;
+    var sUri = this.liveData + oRequest + this.generateRequestCallback(id);
+    sUri = this.doBeforeGetScriptNode(sUri);
+    YAHOO.log("DataSource is querying URL " + sUri, "info", this.toString());
+    this.getUtility.script(sUri,
+            {autopurge: true,
+            onsuccess: util.ScriptNodeDataSource._bumpPendingDown,
+            onfail: util.ScriptNodeDataSource._bumpPendingDown});
+
+    return tId;
+}
+
+});
+
+// Copy static members to ScriptNodeDataSource class
+lang.augmentObject(util.ScriptNodeDataSource, DS);
+
+// Copy static members to ScriptNodeDataSource class
+lang.augmentObject(util.ScriptNodeDataSource,  {
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// ScriptNodeDataSource private static properties
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Unique ID to track requests.
+ *
+ * @property _nId
+ * @type Number
+ * @private
+ * @static
+ */
+_nId : 0,
+
+/**
+ * Counter for pending requests. When this is 0, it is safe to purge callbacks
+ * array.
+ *
+ * @property _nPending
+ * @type Number
+ * @private
+ * @static
+ */
+_nPending : 0,
+
+/**
+ * Global array of callback functions, one for each request sent.
+ *
+ * @property callbacks
+ * @type Function[]
+ * @static
+ */
+callbacks : []
+
+});
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+/****************************************************************************/
+/****************************************************************************/
+/****************************************************************************/
+
+/**
+ * XHRDataSource class for accessing remote data via the YUI Connection Manager
+ * Utility
+ *
+ * @namespace YAHOO.util
+ * @class YAHOO.util.XHRDataSource
+ * @extends YAHOO.util.DataSourceBase  
+ * @constructor
+ * @param oLiveData {HTMLElement}  Pointer to live data.
+ * @param oConfigs {object} (optional) Object literal of configuration values.
+ */
+util.XHRDataSource = function(oLiveData, oConfigs) {
+    this.dataType = DS.TYPE_XHR;
+    this.connMgr = this.connMgr || util.Connect;
+    oLiveData = oLiveData || "";
+    
+    util.XHRDataSource.superclass.constructor.call(this, oLiveData, oConfigs); 
+};
+
+// XHRDataSource extends DataSourceBase
+lang.extend(util.XHRDataSource, DS, {
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// XHRDataSource public properties
+//
+/////////////////////////////////////////////////////////////////////////////
+
+ /**
+ * Alias to YUI Connection Manager, to allow implementers to use a custom class.
+ *
+ * @property connMgr
+ * @type Object
+ * @default YAHOO.util.Connect
+ */
+connMgr: null,
+
+ /**
+ * Defines request/response management in the following manner:
+ * <dl>
+ *     <dt>queueRequests</dt>
+ *     <dd>If a request is already in progress, wait until response is returned
+ *     before sending the next request.</dd>
+ *
+ *     <dt>cancelStaleRequests</dt>
+ *     <dd>If a request is already in progress, cancel it before sending the next
+ *     request.</dd>
+ *
+ *     <dt>ignoreStaleResponses</dt>
+ *     <dd>Send all requests, but handle only the response for the most recently
+ *     sent request.</dd>
+ *
+ *     <dt>allowAll</dt>
+ *     <dd>Send all requests and handle all responses.</dd>
+ *
+ * </dl>
+ *
+ * @property connXhrMode
+ * @type String
+ * @default "allowAll"
+ */
+connXhrMode: "allowAll",
+
+ /**
+ * True if data is to be sent via POST. By default, data will be sent via GET.
+ *
+ * @property connMethodPost
+ * @type Boolean
+ * @default false
+ */
+connMethodPost: false,
+
+ /**
+ * The connection timeout defines how many  milliseconds the XHR connection will
+ * wait for a server response. Any non-zero value will enable the Connection Manager's
+ * Auto-Abort feature.
+ *
+ * @property connTimeout
+ * @type Number
+ * @default 0
+ */
+connTimeout: 0,
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// XHRDataSource public methods
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Overriding method passes query to Connection Manager. The returned
+ * response is then forwarded to the handleResponse function.
+ *
+ * @method makeConnection
+ * @param oRequest {Object} Request object.
+ * @param oCallback {Object} Callback object literal.
+ * @param oCaller {Object} (deprecated) Use oCallback.scope.
+ * @return {Number} Transaction ID.
+ */
+makeConnection : function(oRequest, oCallback, oCaller) {
+
+    var oRawResponse = null;
+    var tId = DS._nTransactionId++;
+    this.fireEvent("requestEvent", {tId:tId,request:oRequest,callback:oCallback,caller:oCaller});
+
+    // Set up the callback object and
+    // pass the request in as a URL query and
+    // forward the response to the handler
+    var oSelf = this;
+    var oConnMgr = this.connMgr;
+    var oQueue = this._oQueue;
+
+    /**
+     * Define Connection Manager success handler
+     *
+     * @method _xhrSuccess
+     * @param oResponse {Object} HTTPXMLRequest object
+     * @private
+     */
+    var _xhrSuccess = function(oResponse) {
+        // If response ID does not match last made request ID,
+        // silently fail and wait for the next response
+        if(oResponse && (this.connXhrMode == "ignoreStaleResponses") &&
+                (oResponse.tId != oQueue.conn.tId)) {
+            YAHOO.log("Ignored stale response", "warn", this.toString());
+            return null;
+        }
+        // Error if no response
+        else if(!oResponse) {
+            this.fireEvent("dataErrorEvent", {request:oRequest, response:null,
+                    callback:oCallback, caller:oCaller,
+                    message:DS.ERROR_DATANULL});
+            YAHOO.log(DS.ERROR_DATANULL, "error", this.toString());
+
+            // Send error response back to the caller with the error flag on
+            DS.issueCallback(oCallback,[oRequest, {error:true}], true, oCaller);
+
+            return null;
+        }
+        // Forward to handler
+        else {
+            // Try to sniff data type if it has not been defined
+            if(this.responseType === DS.TYPE_UNKNOWN) {
+                var ctype = (oResponse.getResponseHeader) ? oResponse.getResponseHeader["Content-Type"] : null;
+                if(ctype) {
+                    // xml
+                    if(ctype.indexOf("text/xml") > -1) {
+                        this.responseType = DS.TYPE_XML;
+                    }
+                    else if(ctype.indexOf("application/json") > -1) { // json
+                        this.responseType = DS.TYPE_JSON;
+                    }
+                    else if(ctype.indexOf("text/plain") > -1) { // text
+                        this.responseType = DS.TYPE_TEXT;
+                    }
+                }
+            }
+            this.handleResponse(oRequest, oResponse, oCallback, oCaller, tId);
+        }
+    };
+
+    /**
+     * Define Connection Manager failure handler
+     *
+     * @method _xhrFailure
+     * @param oResponse {Object} HTTPXMLRequest object
+     * @private
+     */
+    var _xhrFailure = function(oResponse) {
+        this.fireEvent("dataErrorEvent", {request:oRequest, response: oResponse,
+                callback:oCallback, caller:oCaller,
+                message:DS.ERROR_DATAINVALID});
+        YAHOO.log(DS.ERROR_DATAINVALID + ": " +
+                oResponse.statusText, "error", this.toString());
+
+        // Backward compatibility
+        if(lang.isString(this.liveData) && lang.isString(oRequest) &&
+            (this.liveData.lastIndexOf("?") !== this.liveData.length-1) &&
+            (oRequest.indexOf("?") !== 0)){
+                YAHOO.log("DataSources using XHR no longer automatically supply " + 
+                "a \"?\" between the host and query parameters" +
+                " -- please check that the request URL is correct", "warn", this.toString());
+        }
+
+        // Send failure response back to the caller with the error flag on
+        oResponse = oResponse || {};
+        oResponse.error = true;
+        DS.issueCallback(oCallback,[oRequest,oResponse],true, oCaller);
+
+        return null;
+    };
+
+    /**
+     * Define Connection Manager callback object
+     *
+     * @property _xhrCallback
+     * @param oResponse {Object} HTTPXMLRequest object
+     * @private
+     */
+     var _xhrCallback = {
+        success:_xhrSuccess,
+        failure:_xhrFailure,
+        scope: this
+    };
+
+    // Apply Connection Manager timeout
+    if(lang.isNumber(this.connTimeout)) {
+        _xhrCallback.timeout = this.connTimeout;
+    }
+
+    // Cancel stale requests
+    if(this.connXhrMode == "cancelStaleRequests") {
+            // Look in queue for stale requests
+            if(oQueue.conn) {
+                if(oConnMgr.abort) {
+                    oConnMgr.abort(oQueue.conn);
+                    oQueue.conn = null;
+                    YAHOO.log("Canceled stale request", "warn", this.toString());
+                }
+                else {
+                    YAHOO.log("Could not find Connection Manager abort() function", "error", this.toString());
+                }
+            }
+    }
+
+    // Get ready to send the request URL
+    if(oConnMgr && oConnMgr.asyncRequest) {
+        var sLiveData = this.liveData;
+        var isPost = this.connMethodPost;
+        var sMethod = (isPost) ? "POST" : "GET";
+        // Validate request
+        var sUri = (isPost || !lang.isValue(oRequest)) ? sLiveData : sLiveData+oRequest;
+        var sRequest = (isPost) ? oRequest : null;
+
+        // Send the request right away
+        if(this.connXhrMode != "queueRequests") {
+            oQueue.conn = oConnMgr.asyncRequest(sMethod, sUri, _xhrCallback, sRequest);
+        }
+        // Queue up then send the request
+        else {
+            // Found a request already in progress
+            if(oQueue.conn) {
+                var allRequests = oQueue.requests;
+                // Add request to queue
+                allRequests.push({request:oRequest, callback:_xhrCallback});
+
+                // Interval needs to be started
+                if(!oQueue.interval) {
+                    oQueue.interval = setInterval(function() {
+                        // Connection is in progress
+                        if(oConnMgr.isCallInProgress(oQueue.conn)) {
+                            return;
+                        }
+                        else {
+                            // Send next request
+                            if(allRequests.length > 0) {
+                                // Validate request
+                                sUri = (isPost || !lang.isValue(allRequests[0].request)) ? sLiveData : sLiveData+allRequests[0].request;
+                                sRequest = (isPost) ? allRequests[0].request : null;
+                                oQueue.conn = oConnMgr.asyncRequest(sMethod, sUri, allRequests[0].callback, sRequest);
+
+                                // Remove request from queue
+                                allRequests.shift();
+                            }
+                            // No more requests
+                            else {
+                                clearInterval(oQueue.interval);
+                                oQueue.interval = null;
+                            }
+                        }
+                    }, 50);
+                }
+            }
+            // Nothing is in progress
+            else {
+                oQueue.conn = oConnMgr.asyncRequest(sMethod, sUri, _xhrCallback, sRequest);
+            }
+        }
+    }
+    else {
+        YAHOO.log("Could not find Connection Manager asyncRequest() function", "error", this.toString());
+        // Send null response back to the caller with the error flag on
+        DS.issueCallback(oCallback,[oRequest,{error:true}],true,oCaller);
+    }
+
+    return tId;
+}
+
+});
+
+// Copy static members to XHRDataSource class
+lang.augmentObject(util.XHRDataSource, DS);
+
+
+
+
+
+
+
+
+
+
+
+
+
+/****************************************************************************/
+/****************************************************************************/
+/****************************************************************************/
+
+/**
+ * Factory class for creating a BaseDataSource subclass instance. The sublcass is
+ * determined by oLiveData's type, unless the dataType config is explicitly passed in.  
+ *
+ * @namespace YAHOO.util
+ * @class YAHOO.util.DataSource
+ * @constructor
+ * @param oLiveData {HTMLElement}  Pointer to live data.
+ * @param oConfigs {object} (optional) Object literal of configuration values.
+ */
+util.DataSource = function(oLiveData, oConfigs) {
+    oConfigs = oConfigs || {};
+    
+    // Point to one of the subclasses, first by dataType if given, then by sniffing oLiveData type.
+    var dataType = oConfigs.dataType;
+    if(dataType) {
+        if(dataType == DS.TYPE_LOCAL) {
+            lang.augmentObject(util.DataSource, util.LocalDataSource);
+            return new util.LocalDataSource(oLiveData, oConfigs);            

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