2 * Copyright (C) 2016 Roland Haeder
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 package org.mxchange.jshopcore.model.basket;
19 import java.io.Serializable;
20 import java.util.List;
21 import org.mxchange.jshopcore.exceptions.BasketItemAlreadyAddedException;
24 * An interface for baskets
26 * @author Roland Haeder<roland@mxchange.org>
27 * @param <T> Any addable basket items
29 public interface Basket<T extends AddableBasketItem> extends Serializable {
32 * Adds given item instance to this basket
34 * @param item Item instance to add
36 * @throws org.mxchange.jshopcore.exceptions.BasketItemAlreadyAddedException
46 void addItem (final T item) throws BasketItemAlreadyAddedException;
49 * Clears the basket instance
54 * Some "getter" for all entries in this basket
56 * @return Map on all basket items
61 * Getter for last entry
63 * @return Last added item in basket
68 * Getter for basket size
75 * Checks whether the given item has already been added by checking the
78 * @param item Item instance to check
80 * @return Whether the given item has been found
82 boolean isAdded (final T item);
85 * Checks if the basket is empty
87 * @return Whether the basket is empty
92 boolean equals (final Object object);