public void
freeCounter() { // To set the state of the counter - Not an interface method : must be called
// internally by other functions
this.state = CounterState.FREE;
Log.enter(this.toString() + " is now free");
element = null;
}
public void updateState() {
if (quantity == 0) {
this.state = CounterState.CLOSED;
Log.enter(this.toString() + " is now closed");
}
}
public void reduceQuantity(int reductionAmount) { // To take away value of amount of goods
this.quantity -= reductionAmount;
if (this.quantity < 0) this.quantity = 0;
Log.enter(
this.toString() + " has lost " + reductionAmount + " and has only " + quantity + " left");
}