public AlertType getType(Integer id, Integer datavalue){
		
		if(alertTypes.isEmpty()){
			
			for(AlertType type : AlertType.values()){
				
				alertTypes.put(type.getItemId() + ":" + type.getDataValue(), type);
			}
		}
		
		AlertType type = alertTypes.get(id + ":" + datavalue);
		
		return type;
	}