cafe.main
Class MainGuiHandler

java.lang.Object
  cafe.main.MainGuiHandler

All Implemented Interfaces:

UserInterfaceEvent

public class MainGuiHandler
extends java.lang.Object
implements UserInterfaceEvent

This class connects GUI with Database and Authentication components

Version:

0.2

Author:

Markus Penttila

Constructor Summary

MainGuiHandler(Database db, CoffeeTouch main, AuthenticationSettings authSettings)
Constructs a new instance of this class and creates Authentication instance.

Method Summary

boolean	authenticateUser(java.lang.String username, java.lang.String password) Authenticates an user's CS department username and password by calling UserAuthentication interface's authenticateUser method.
CancelProduct	cancelProductExport(UserInfo user) Cancels the last export transaction from the given user.
void	deleteFingerprint(int id) Deletes a certain fingerprint (data) from the database and fingerprint cache by calling Database interface's deleteFingerprint and CoffeeTouch's deleteFingerprint methods.
void	exportProduct(UserInfo user, ExportProduct product) Marks an export transaction to the given user and product by calling Database interface's exportProduct method.
ImportProduct[]	getAlerts() Returns a list of all products that have an alert set.
ProductGroup[]	getProductGroups() Returns a list of all product groups.
ExportProduct[]	getProductList() Returns a list of all exportable products.
void	importProduct(UserInfo user, ImportProduct product, double amount) Marks an import transaction to the given user and product by calling Database interface's importProduct method.
void	insertAlert(ImportProduct product) Inserts an alert to the given product to the database by calling Database interface's insertAlert method.
UserInfo	loadUser(java.lang.String username) Loads an user's information from the database based on the CS dep. username given as an argument.
void	removeAlert(ImportProduct product) Removes the alert from the given product by calling Database interface's removeAlert method.
void	saveUser(UserInfo user) Saves an UserInfo instance describing a certain user to the database by calling Database interface's saveUser method.

Methods inherited from class java.lang.Object

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

Constructor Detail

MainGuiHandler

public MainGuiHandler(Database db,
                      CoffeeTouch main,
                      AuthenticationSettings authSettings)

Constructs a new instance of this class and creates Authentication instance.

Parameters:

db - reference to a class that implemens database interface

main - reference to main class

authSettings - settings to be passed on to Authentication

Method Detail

authenticateUser

public boolean authenticateUser(java.lang.String username,
                                java.lang.String password)

Authenticates an user's CS department username and password by calling UserAuthentication interface's authenticateUser method.

Specified by:

authenticateUser in interface UserInterfaceEvent

Parameters:

username - user's username

password - user's password

Returns:

true if username and password match, false if the do not.

cancelProductExport

public CancelProduct cancelProductExport(UserInfo user)

Cancels the last export transaction from the given user. Calls Database interface's cancelProductExport method. If a database error occurs, calls CoffeeTouch's displayDBError method.

Specified by:

cancelProductExport in interface UserInterfaceEvent

Parameters:

user - the user whose transaction will be cancelled

Returns:

information about the cancelled product. null if such transaction could not be found.

deleteFingerprint

public void deleteFingerprint(int id)

Deletes a certain fingerprint (data) from the database and fingerprint cache by calling Database interface's deleteFingerprint and CoffeeTouch's deleteFingerprint methods. If a database exception occurs, calls CoffeeTouch's displayDBError method.

Specified by:

deleteFingerprint in interface UserInterfaceEvent

Parameters:

id - the id of the fingerprint that will be deleted

exportProduct

public void exportProduct(UserInfo user,
                          ExportProduct product)

Marks an export transaction to the given user and product by calling Database interface's exportProduct method. If a database exception occurs, calls CoffeeTouch's displayDBError.

Specified by:

exportProduct in interface UserInterfaceEvent

Parameters:

user - the current user exporting a product

product - the product to be exported

getAlerts

public ImportProduct[] getAlerts()

Returns a list of all products that have an alert set. Gets the list by calling Database interface's getAlerts method. If a database exception occurs, calls CoffeeTouch's displayDBError.

Specified by:

getAlerts in interface UserInterfaceEvent

Returns:

list of products as ImportProduct instances.

getProductGroups

public ProductGroup[] getProductGroups()

Returns a list of all product groups. Gets the list by calling Database interface's getProductGroups method. If a database exception occurs, calls CoffeeTouch's displayDBError.

Specified by:

getProductGroups in interface UserInterfaceEvent

Returns:

the list of ProductGroup instances

getProductList

public ExportProduct[] getProductList()

Returns a list of all exportable products. Gets the list by calling Database interface's getProductList method. If a database error occurs, calls CoffeeTouch's displayDBError method.

Specified by:

getProductList in interface UserInterfaceEvent

Returns:

the list containing all exportable products

importProduct

public void importProduct(UserInfo user,
                          ImportProduct product,
                          double amount)

Marks an import transaction to the given user and product by calling Database interface's importProduct method. If a database error occurs, calls CoffeeTouch's displayDBError method.

Specified by:

importProduct in interface UserInterfaceEvent

Parameters:

user - the current user importing a product

product - the product to be imported

amount - the amount (size) of the imported product

insertAlert

public void insertAlert(ImportProduct product)

Inserts an alert to the given product to the database by calling Database interface's insertAlert method. If a database error occurs, calls CoffeeTouch's displayDBError method.

Specified by:

insertAlert in interface UserInterfaceEvent

Parameters:

product - the product that will receive the alert

loadUser

public UserInfo loadUser(java.lang.String username)

Loads an user's information from the database based on the CS dep. username given as an argument. Calls Database interface's loadUser(username) method. If a database error occurs, calls CoffeeTouch's displayDBError method.

Specified by:

loadUser in interface UserInterfaceEvent

Parameters:

username - the username of the user to be loaded

Returns:

a UserInfo instance containing a user's information.

removeAlert

public void removeAlert(ImportProduct product)

Removes the alert from the given product by calling Database interface's removeAlert method. If a database error occurs, calls CoffeeTouch's displayDBError method.

Specified by:

removeAlert in interface UserInterfaceEvent

Parameters:

product - the product whose alert will be dismissed

saveUser

public void saveUser(UserInfo user)

Saves an UserInfo instance describing a certain user to the database by calling Database interface's saveUser method.

Specified by:

saveUser in interface UserInterfaceEvent

Parameters:

user - UserInfo to be stored