Package no.ntnu.idatt1002.demo.repo

Class ItemRegister

java.lang.Object

no.ntnu.idatt1002.demo.repo.ItemRegister

public class ItemRegister
extends Object

This class represents a register for items. Allowing for communication between the database and the user interface.

Field Summary

Fields

Modifier and Type	Field	Description
private final DAO	dao
private List<Item>	items

Constructor Summary

Constructors

Constructor	Description
ItemRegister(DAO dao)	Constructor for the ItemRegister class.

Method Summary

Modifier and Type	Method	Description
void	addItem(String name, String category, String allergy)	This method adds a new item to the database.
void	deleteItem(int id)	This method deletes an item from the database.
void	filterItemsByCategory(String category)	Retrieves filtered items by category from the database.
void	getAllItems()	This method retrieves all items from the database.
private int	getIndexFromId(int id)	Returns the index of the item with the given id.
Item	getItemById(int id)
Map<Integer,Item>	getItems()	Returns the items in the register in the form of lists.
private void	packageToItem(List<List<String>> items)	This method packages the lists of strings into items.
void	searchItemsByName(String name)	This method searches for items by name and retrieves them from the database.
String	toString()	Returns a string representation of the item register.
void	updateItem(int id, String name, String category, String allergy)	Updates an item in the database.

Methods inherited from class java.lang.Object

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

Field Details

items

private List<Item> items

dao

private final DAO dao

Constructor Details

ItemRegister

public ItemRegister(DAO dao)

Constructor for the ItemRegister class.

Parameters:

dao - the data access object

Throws:

IllegalArgumentException - if dao is null

Method Details

getItems

public Map<Integer,Item> getItems()

Returns the items in the register in the form of lists.

Returns:

the items in the register as lists of strings

filterItemsByCategory

public void filterItemsByCategory(String category)

Retrieves filtered items by category from the database.

Parameters:

category - the category to filter by

Throws:

IllegalArgumentException - if category is null or empty

searchItemsByName

public void searchItemsByName(String name)

This method searches for items by name and retrieves them from the database.

Parameters:

name - the name to search by

Throws:

IllegalArgumentException - if name is null or empty

getAllItems

public void getAllItems()

This method retrieves all items from the database.

packageToItem

private void packageToItem(List<List<String>> items)

This method packages the lists of strings into items.

addItem

public void addItem(String name,
 String category,
 String allergy)

This method adds a new item to the database.

Parameters:

name - the name of the item

category - the category of the item

allergy - the allergy of the item

deleteItem

public void deleteItem(int id)

This method deletes an item from the database.

Parameters:

id - the id of the item to delete

Throws:

IllegalArgumentException - if the item does not exist

getItemById

public Item getItemById(int id)

getIndexFromId

private int getIndexFromId(int id)

Returns the index of the item with the given id.

Parameters:

id - the id of the item*

Returns:

the index of the item with the given id

Throws:

IllegalArgumentException - if id is less than 1

updateItem

public void updateItem(int id,
 String name,
 String category,
 String allergy)

Updates an item in the database.

Parameters:

id - the id of the item to update

name - the name of the item

category - the category of the item

allergy - the allergy of the item

Throws:

IllegalArgumentException - if the item does not exist

toString

public String toString()

Returns a string representation of the item register.

Overrides:

toString in class Object

Returns:

a string representation of the item register