package LockAPPC;

public abstract class LockComponent
{
	boolean lock;
	
	// classes to be defined by the extending inner class
	public abstract Object get_host();

	public abstract void actualOp(Object passed);
	public abstract void actualOp(Object passed, Object passed2);
	public abstract Object actualOp();

	// real component methods
	public void pushOp(Object passed)
	{
		if (!lock)
		{
			System.out.println("Locking");
			actualOp(passed);
			System.out.println("Unlocking");
		}
	}
	public void pushOp(Object passed, Object passed2)
	{
		if (!lock)
		{
			System.out.println("Locking");
			actualOp(passed, passed2);
			System.out.println("Unlocking");
		}
	}
	public Object popOp()
	{
		if (!lock)
		{
			System.out.println("Locking");
			Object pop = actualOp();
			System.out.println("Unlocking");
			return pop;
		}
		return null;
	}
	
}