Package crms.lib

Class RentalDatabase

java.lang.Object

crms.lib.Database<Rental>

crms.lib.RentalDatabase

public class RentalDatabase
extends Database<Rental>

The RentalDatabase class is responsible for managing rental operations including fetching recorded Rental objects from the local database, checking car availability, and generating rental reports.

This class follows the singleton pattern to ensure that only one instance of RentalDatabase is created.

Field Summary

Fields inherited from class crms.lib.Database

dataList

Method Summary

Modifier and Type	Method	Description
void	fetchFromDisk()	Fetches the recorded Rental objects from the file rentals.txt.
static RentalDatabase	getInstance()	Returns the singleton instance of RentalDatabase.
Rental	getItemById(String id)	Retrieves a rental by its ID.
void	saveToDisk()	Saves the list of Rental objects to the file rentals.txt.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

getInstance

public static RentalDatabase getInstance()

Returns the singleton instance of RentalDatabase. If the instance does not exist, it is created and the rentals are fetched from disk.

Returns:

the singleton instance of RentalDatabase.

getItemById

public Rental getItemById(String id)

Retrieves a rental by its ID.

Specified by:

getItemById in class Database<Rental>

Parameters:

id - the ID of the rental.

Returns:

the Rental with the specified ID, or null if not found.

fetchFromDisk

public void fetchFromDisk()

Fetches the recorded Rental objects from the file rentals.txt.

Specified by:

fetchFromDisk in class Database<Rental>

saveToDisk

public void saveToDisk()

Saves the list of Rental objects to the file rentals.txt.

Specified by:

saveToDisk in class Database<Rental>