/**
@author 	Amol Salunkhe
@version	Date of Creation: 11/29/2016
 */
(function(){
	CommonClassFactory = function (){
		function createDataSource (url,dataTemplate,argumentField,dataPostProcessFn,dataReshapeFn){
			return {
				  load: function (loadOptions) {
					  var d = new $.Deferred();
					  var params = {};
					   //Getting filter options
					   if (loadOptions.filter)  {
						   params.filter = JSON.stringify(loadOptions.filter);
					   }
					   //Getting sort options
					   if (loadOptions.sort)  {
						   params.sort = JSON.stringify(loadOptions.sort);
					   }    
					   //Getting dataField option
					   if (loadOptions.dataField)  {
						   params.dataField = loadOptions.dataField;
					   }         
			
			
					   //If the select expression is specified
					   if (loadOptions.select)  {
						   params.select= JSON.stringify(loadOptions.select);
					   } 
					   
					   //Getting group options
					   if (loadOptions.group)  {
						   params.group = JSON.stringify(loadOptions.group);
					   } 
			
					  //skip and take are used for paging
					  params.skip = loadOptions.skip; //A number of records that should be skipped
					  params.take = loadOptions.take; //A number of records that should be taken
					  $.getJSON(url, params).done(function (data) {
						  	if($.isFunction(dataReshapeFn)){
						  		data = dataReshapeFn(data);
						  	}
						  
							//arrange the data according to  the dataTemplate 
						  	if(dataTemplate){
						  		var map = {};
						  		var dataAsPerTemplate = new Array(dataTemplate.length);
						  		var cnt = 0, maxCnt = dataAsPerTemplate.length;
						  		while(cnt < maxCnt){
						  			map[dataTemplate[cnt][argumentField]] = cnt;
						  			dataAsPerTemplate[cnt] = $.extend( true,{}, dataTemplate[cnt]);
						  			cnt++;
						  		}//while(cnt < maxCnt)
						  		
						  		cnt = 0, maxCnt = data.length;
						  		while(cnt < maxCnt){
						  			if($.isNumeric(map[data[cnt][argumentField]])){
						  				dataAsPerTemplate[map[data[cnt][argumentField]]] = $.extend( true,{}, data[cnt]);
						  			}
						  			cnt++;
						  		}//while(cnt < maxCnt)
						  		
						  		data = dataAsPerTemplate;
						  	}//if(dataTemplate)
						  	
						  	if($.isFunction(dataPostProcessFn)){
						  		data = dataPostProcessFn(data);
						  	}

						  	//If your data service allows returning total count in a single request, use the following code 
							d.resolve(data, { totalCount: data.length }); //where data.items array of items, data.count a number of items without applying filter
							//In this case, you will not need to implement the totalCount method as shown below
						  });
						  return d.promise();
					  }
				};
		}//function createDataSource
		this.createDataSource = createDataSource;


		return this;
	};//CommonClassFactory = function

})();//anonym function -- IFFE