package calculator2003;

	/** Strategy to use (once) after an operator key is hit to make
	 *  sure the display is saved and we are set up for the next value.
	 *  Implements the Decorator Design Pattern, and the Immutable pattern.
	 * @author jbergin
	 *	 
	 **/
	public class SaveStrategy implements NumberStrategy // A decorator
	{
		public SaveStrategy(NumberStrategy decorated, CalculatorModel calc)
		{	this.decorated = decorated;
			calculator = calc;
		}

		public void apply(int value)
		{	calculator.saveValue();
			decorated.apply(value);
			calculator.resetStrategy();
		}

		private NumberStrategy decorated = null;
		private CalculatorModel calculator = null;
	}