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ParkingRate.java

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package park;

import java.util.Calendar;

import java.util.Date;

/*

* Req3: Any registered client can book a valid parking space (i.e., currently not occupied or booked by other

* users) after login to the system, the parking rates for different types of users are different, i.e., 5$, 8$, 10$, and

* 15$ for students, faculty members, non-faculty staffs, and visitors per hour respectively.

* **/

//Component interface

interface ParkingRate {

public int calculateRate(int hours);

}

//Concrete component classes

class StudentRate implements ParkingRate {

public int calculateRate(int hours) {

return hours * 5;

}

}

class FacultyRate implements ParkingRate {

public int calculateRate(int hours) {

return hours * 8;

}

}

class StaffRate implements ParkingRate {

public int calculateRate(int hours) {

return hours * 10;

}

}

class VisitorRate implements ParkingRate {

public int calculateRate(int hours) {

return hours * 15;

}

}

//Decorator class

abstract class ParkingRateDecorator{

protected ParkingRate rate;

public ParkingRateDecorator(ParkingRate rate) {

this.rate = rate;

}

public int calculateRate(int hours) {

return rate.calculateRate(hours);

}

}

//Concrete decorator classes

class EarlyBirdDecorator extends ParkingRateDecorator {

public EarlyBirdDecorator(ParkingRate rate) {

super(rate);

}

public int calculateRate(int hours) {

return rate.calculateRate(hours);

}

}