package FileSystem;

/**
 * FileSystem is intended to handle the high-level work, including handling user
 * commands. You are not required to use anything in this class, although this
 * class must contain your project's main method.
 * 
 * @author 
 * 
 */
public class FileSystem {

    InputSource in;

    public FileSystem(InputSource i) {
	in = i;
    }

    /**
     * command takes in a string that inputed by the user, parses it, and
     * processes it accordingly. This method should contain no more than 40
     * lines of code, although you can certainly do it with much less.
     * 
     * @param s
     *            The user input.
     */
    public void command(String[] s) {
	if (s == null)
	    exit(0);
    }

    /**
     * This uses the InputSource to get strings one line at a time.
     */
    public static void main(String[] args) {
	InputSource in;
	if (args.length == 0) {
	    in = new InputSource();
	} else {
	    in = new InputSource(args[0]);
	}
	FileSystem fs = new FileSystem(in);
	String[] strings;
	while (true) {
	    strings = in.nextLine();
	    fs.command(strings);
	}
    }

    /**
     * The Following methods are provided for student testing.
     */

    /**
     * Exit from the program. When the testing state is true, throws
     * ExitException with the given CODE as parameter. Otherwise, behaves just
     * like System.exit. For this all to work, other parts of the program should
     * not call System.exit directly.
     */
    static void exit(int code) {
	throw new ExitException(code);
    }
}