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 /**
 * Extends DataSource with schema-parsing on XML data.
 *
 * @module datasource
 * @submodule datasource-xmlschema
 */
 
 /**
 * Adds schema-parsing to the DataSource Utility.
 * @class DataSourceXMLSchema
 * @extends Plugin.Base
 */
 var DataSourceXMLSchema = function() {
 DataSourceXMLSchema.superclass.constructor.apply(this, arguments);
 };
 
 Y.mix(DataSourceXMLSchema, {
 /**
 * The namespace for the plugin. This will be the property on the host which
 * references the plugin instance.
 *
 * @property NS
 * @type String
 * @static
 * @final
 * @value "schema"
 */
 NS: "schema",
 
 /**
 * Class name.
 *
 * @property NAME
 * @type String
 * @static
 * @final
 * @value "dataSourceXMLSchema"
 */
 NAME: "dataSourceXMLSchema",
 
 /////////////////////////////////////////////////////////////////////////////
 //
 // DataSourceXMLSchema Attributes
 //
 /////////////////////////////////////////////////////////////////////////////
 
 ATTRS: {
 schema: {
 //value: {}
 }
 }
 });
 
 Y.extend(DataSourceXMLSchema, Y.Plugin.Base, {
 /**
 * Internal init() handler.
 *
 * @method initializer
 * @param config {Object} Config object.
 * @private
 */
 initializer: function(config) {
 this.doBefore("_defDataFn", this._beforeDefDataFn);
 },
 
 /**
 * Parses raw data into a normalized response.
 *
 * @method _beforeDefDataFn
 * @param tId {Number} Unique transaction ID.
 * @param request {Object} The request.
 * @param callback {Object} The callback object with the following properties:
 * <dl>
 * <dt>success (Function)</dt> <dd>Success handler.</dd>
 * <dt>failure (Function)</dt> <dd>Failure handler.</dd>
 * </dl>
 * @param data {Object} Raw data.
 * @protected
 */
 _beforeDefDataFn: function(e) {
 var schema = this.get('schema'),
 payload = e.details[0],
 // TODO: Do I need to sniff for DS.IO + responseXML.nodeType 9?
 data = Y.XML.parse(e.data.responseText) || e.data;
 
 payload.response = Y.DataSchema.XML.apply.call(this, schema, data) || {
 meta: {},
 results: data
 };
 
 this.get("host").fire("response", payload);
 
 return new Y.Do.Halt("DataSourceXMLSchema plugin halted _defDataFn");
 }
 });
 
 Y.namespace('Plugin').DataSourceXMLSchema = DataSourceXMLSchema;