Package com.ntu.fdae.group1.bto.enums

Enum ApplicationStatus

java.lang.Object

java.lang.Enum<ApplicationStatus>

com.ntu.fdae.group1.bto.enums.ApplicationStatus

All Implemented Interfaces:

Serializable, Comparable<ApplicationStatus>, java.lang.constant.Constable

public enum ApplicationStatus
extends Enum<ApplicationStatus>

Defines the possible statuses for BTO housing applications in the system.

This enum tracks the lifecycle of a housing application from submission through completion. Applications follow a specific workflow with valid status transitions:

Valid status transitions:

• PENDING → SUCCESSFUL → BOOKED
• PENDING → UNSUCCESSFUL
• SUCCESSFUL → UNSUCCESSFUL (withdrawal before booking)
• BOOKED → UNSUCCESSFUL (withdrawal after booking)

Invalid status transitions:

• PENDING → BOOKED (must go through SUCCESSFUL first)
• SUCCESSFUL → PENDING (cannot revert to previous status)

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
BOOKED	Represents an application where the applicant has successfully selected and booked a flat.
PENDING	Represents an application that has been submitted but not yet processed.
SUCCESSFUL	Represents an application that has been processed and selected for a flat.
UNSUCCESSFUL	Represents an application that was rejected, withdrawn, or otherwise did not result in a flat booking.

Method Summary

Modifier and Type	Method	Description
static ApplicationStatus	valueOf(String name)	Returns the enum constant of this type with the specified name.
static ApplicationStatus[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

PENDING

public static final ApplicationStatus PENDING

Represents an application that has been submitted but not yet processed. This is the initial state of all applications.

SUCCESSFUL

public static final ApplicationStatus SUCCESSFUL

Represents an application that has been processed and selected for a flat. Applications in this state have passed the ballot but haven't yet booked a flat.

UNSUCCESSFUL

public static final ApplicationStatus UNSUCCESSFUL

Represents an application that was rejected, withdrawn, or otherwise did not result in a flat booking. Applications can enter this state from PENDING (direct rejection) or from SUCCESSFUL/BOOKED (withdrawal by applicant).

BOOKED

public static final ApplicationStatus BOOKED

Represents an application where the applicant has successfully selected and booked a flat. This is the final successful state in the application process.

Method Details

values

public static ApplicationStatus[] values()

Returns an array containing the constants of this enum type, in the order they are declared.

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static ApplicationStatus valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null