JRummikub/src/jrummikub/model/IStoneTray.java

package jrummikub.model;

import jrummikub.util.Pair;

public interface IStoneTray<E extends Sizeable> extends
		Iterable<Pair<E, Position>>, Cloneable {

	/**
	 * Removes object from tray and returns it
	 * 
	 * @param position
	 *          position of the object that will be removed
	 * @return the picked up stone
	 */
	public E pickUp(Position position);

	/**
	 * Adds object to the tray
	 * 
	 * @param object
	 *          object to add to Hand
	 * @param position
	 *          {@link Position} to put the object
	 */
	public void drop(E object, Position position);

	/**
	 * Returns the position of an object that is already on the tray
	 * 
	 * @param object
	 *          object whose position is requested
	 * @return position of the object or null when the object is not on the tray
	 */
	public Position getPosition(E object);

	public boolean pickUp(E object);

	public IStoneTray<E> clone();

	public int getSize();

}