/**
* Check whether this world has proper food rations attached to it.
*
* @return | result == | for each food in Food | ( if (this.hasAsFood(food)) | then
* canHaveAsFood(food) | && (food.getWorld() == this) )
*/
@Raw
public boolean hasProperFoodRations() {
for (Food food : this.foodRations) {
if (!canHaveAsFood(food) || food.getWorld() != this) return false;
}
return true;
}
/**
* 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);
}