/**
* Initialize this new Food with given x-coordinate, y-coordinate and world.
*
* @param world The world this food is placed in.
* @param xCoordinate The x-coordinate for this new food.
* @param yCoordinate The y-coordinate for this new food.
* @post | new.getWorld() == world
* @post | new.getXCoordinate() == xCoordinate
* @post | new.getYCoordinate() == yCoordinate
* @post | new.getActive() == true
*/
@Raw
public Food(World world, double xCoordinate, double yCoordinate) {
setWorld(world);
setXCoordinate(xCoordinate);
setYCoordinate(yCoordinate);
setActive(true);
}
/**
* Remove the given food from the set of food rations attached to this world.
*
* @param food The food to be removed
* @post | !new.hasAsFood(food)
* @post | if (hasAsFood(food)) | ((new food).getWorld() == null)
* @throws IllegalArgumentException() | !hasAsFood(food)
*/
public void removeAsFood(Food food) throws IllegalArgumentException {
if (!hasAsFood(food)) throw new IllegalArgumentException();
this.foodRations.remove(food);
food.setWorld(null);
}
/**
* Add the given food to the set of food rations attached to this world.
*
* @param food The food to be added.
* @post | new.hasAsFood(food)
* @post | (new food).getWorld() == this
* @throws IllegalArgumentException("You can't add this food.") | !canHaveAsFood(food)
* @throws IllegalArgumentException("You can't add this food.") | ( (food != null) | &&
* (food.getWorld() != null) )
*/
public void addAsFood(Food food) throws IllegalArgumentException {
if (!canHaveAsFood(food)) throw new IllegalArgumentException("You can't add this food.");
if (food.getWorld() != null) throw new IllegalArgumentException("You can't add this food.");
this.foodRations.add(food);
food.setWorld(this);
}