src/ch/epfl/maze/physical/Predator.java


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package ch.epfl.maze.physical;

import ch.epfl.maze.util.Direction;
import ch.epfl.maze.util.Vector2D;

import java.util.Arrays;
import java.util.EnumSet;
import java.util.Set;

/**
 * Predator that kills a prey when they meet with each other in the labyrinth.
 *
 * @author EPFL
 * @author Pacien TRAN-GIRARD
 */
abstract public class Predator extends ProbabilisticAnimal {

    /**
     * Constructs a predator with a specified position.
     *
     * @param position Position of the predator in the labyrinth
     */
    public Predator(Vector2D position) {
        super(position);
    }

    /**
     * Retrieves the next direction of the animal, by selecting one choice among
     * the ones available from its position.
     * <p>
     * In this variation, the animal knows the world entirely. It can therefore
     * use the position of other animals in the daedalus to hunt more
     * effectively.
     *
     * @param choices  The choices left to the animal at its current position (see
     *                 {@link ch.epfl.maze.physical.World#getChoices(Vector2D)
     *                 World.getChoices(Vector2D)})
     * @param daedalus The world in which the animal moves
     * @return The next direction of the animal, chosen in {@code choices}
     */
    abstract public Direction move(Set<Direction> choices, Daedalus daedalus);

    /**
     * Retrieves the next direction of the animal, by selecting one choice among
     * the ones available from its position.
     * <p>
     * In this variation, the animal knows the world entirely. It can therefore
     * use the position of other animals in the daedalus to hunt more
     * effectively.
     *
     * @param choices  The choices left to the animal at its current position (see
     *                 {@link ch.epfl.maze.physical.World#getChoices(Vector2D)
     *                 World.getChoices(Vector2D)})
     * @param daedalus The world in which the animal moves
     * @return The next direction of the animal, chosen in {@code choices}
     */
    public final Direction move(Direction[] choices, Daedalus daedalus) {
        return this.move(EnumSet.copyOf(Arrays.asList(choices)), daedalus);
    }

}