package com.azabani.java.rover;

public class RoverCommandCodec {
	public static String encode(RoverCommand c) {
		return c.toString();
	}
	public static RoverCommand decode(String s) {
		// TODO: write the decoding algorithm
		return null;
	}
}

@@ -185,60 +185,690 @@
 %7B%0A%09%09
-// TODO: write the decoding algorithm%0A%09%09return null;
+String%5B%5D tokens = s.split(%22:%22, 2);%0A%09%09String kind = tokens%5B0%5D;%0A%09%09if (kind.equals(%22rotate%22)) %7B%0A%09%09%09double angle = Double.parseDouble(tokens%5B1%5D);%0A%09%09%09return new RotationCommand(angle);%0A%09%09%7D else if (kind.equals(%22translate%22)) %7B%0A%09%09%09double distance = Double.parseDouble(tokens%5B1%5D);%0A%09%09%09return new TranslationCommand(distance);%0A%09%09%7D else if (kind.equals(%22analyse%22)) %7B%0A%09%09%09return new AnalysisCommand();%0A%09%09%7D else if (kind.equals(%22photograph%22)) %7B%0A%09%09%09return new PhotographyCommand();%0A%09%09%7D else if (kind.equals(%22call%22)) %7B%0A%09%09%09int listIndex = Integer.parseInt(tokens%5B1%5D);%0A%09%09%09return new RecursionCommand(listIndex);%0A%09%09%7D else %7B%0A%09%09%09throw new IllegalArgumentException(%0A%09%09%09%09%22invalid command string%22%0A%09%09%09);%0A%09%09%7D
 %0A%09%7D%0A

implement RoverCommandCodec.decode()