import java.util.*;
/**
* This class models a hotel reesrvation system
*
* @author Ting Shih
* @version 1.0.0
*/
public class Reservation {
/*
* occupancy is an array that indicates the occupant of each room.
* If there are no occupants, it is marked null
*/
private String[] occupancy;
/* MAX_ROOMS is the maximum number of rooms.and also represent the array size */
private int MAX_ROOMS = 5;
/**
* Creates a list of rooms and make them available (by setting them to null).
*/
public Reservation() {
/* creates the array of occupancy for the size of MAX_ROOMS */
occupancy = new String[MAX_ROOMS];
/*
* The following is not necessary, since a newly constructed array
* will have null values by default. But we will set them to null
* for illustrative purposes.
*/
for (int index = 0; index < occupancy.length; index++) {
occupancy[index] = null;
}
}
/**
* Adds a new customer to the hotel.
*
* @param customer is the name of the customer to be added.
* @return true if the hotel is not full and reservatoin was made successfully,
* false otherwise.
*/
public boolean reserve (String customer) {
int roomChecked = 0;
/* Use a while-loop to check if a room is available */
while (roomChecked < occupancy.length && occupancy[roomChecked] != null ) {
roomChecked ++;
}
/*
* if roomChecked is is less than the number of rooms in the hotel,
* then there is an availability in the hotel, otherwise, all the rooms
* have been searched and no availability was found
*/
if (roomChecked < occupancy.length) {
occupancy[roomChecked] = customer;
return true;
} else {
return false;
}
}
/**
* checks out a customer and marks the room as empty
*
* @param customer is the name of the customer checking out
* @return true if customer had a prior reservation so cancellation possible,
* false otherwise.
*/
public boolean cancel (String customer) {
int roomChecked = 0;
/* searches all the rooms until the customer who had a reservation is found */
while (roomChecked < occupancy.length &&
(occupancy[roomChecked] == null || !occupancy[roomChecked].equals(customer)) ) {
roomChecked++;
}
/*
* system cancels the reservation made by marking the room available
* otherwise return false to indicate the customer did not make a reservation
*/
if (roomChecked < occupancy.length) {
occupancy[roomChecked] = null;
return true;
} else {
return false;
}
}
}