public static Workshop getWorkshopByInfo(String code, String title, String date, String time){
		ArrayList<Object>data = ReadFromFile.getData("WORKSHOPS");
		Workshop w = null;
		for(int i = 0; i < data.size();i++){
			Workshop temp = (Workshop)data.get(i);
			if(temp.getCode().equals(code) && temp.getTitle().equals(title) && temp.getDate().equals(date) && temp.getTime().equals(time)){
				w = temp;
			}
		}
		return w;
	}