function Row(json)
{   
   this._systemStatus = {};
   
   this._data = {};
   
   this._init = function()
   {
   		if(json == null)
   		{
   			return;
   		}
   		this._data = json;
   		if(json["_sys_status"] == null)
   		{
   			this._data["_sys_status"] = {}; 
   		} 
   		 this._systemStatus = this._data["_sys_status"];
   		 if(this.getStatus() == null)
   		 {
   			this.setStatus("new");
   		 }
   }

   this.getItemValue = function(columnName)
   {
   		return this._data[columnName];
   }
   
   this.setStatus = function(statusData)
   {
   		this._systemStatus["status"] = statusData;
   }
   
   this.getStatus = function()
   {
	   return this._systemStatus["status"];
   }
   
   this.setItemValue = function(columnName,value)
   {
   	    var oldValue = this._data[columnName];
   	    if(oldValue == value)
   	    {
   	    	return;
   	    }
   		this._data[columnName] = value;
   		if(this._systemStatus[columnName] == null)
   		{
   			this._systemStatus[columnName] = {};
   		}
   		if(this.getStatus() == "new")
   		{
   			this.setStatus("newModify");
   		}
   		else if(this.getStatus() == "notModify")
   		{
   			this.setStatus("dataModified");
   		}
//   		this._systemStatus[columnName]["status"] = "dataModified";
//   		if(this._systemStatus[columnName]["original"] == null)
//   		{
//   			this._systemStatus[columnName]["original"] = oldValue;
//   		}
   }
   
   this.getData = function()
   {
   		return this._data;
   }
   
   this._init();
}