1 /*
2 * Copyright (C) 2025 Alberto Irurueta Carro (alberto@irurueta.com)
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package com.irurueta.hermes;
18
19 /**
20 * Class to represent a change in a collection item that has been updated.
21 *
22 * @param <T> type of items in the collection.
23 */
24 public class UpdatedListItemChange<T> extends ListItemChange {
25
26 /**
27 * Item before being updated.
28 */
29 private final T oldItem;
30
31 /**
32 * Item after being updated.
33 */
34 private final T newItem;
35
36 /**
37 * Indicates the position where the item has been updated.
38 */
39 private final int position;
40
41 /**
42 * Constructor.
43 *
44 * @param oldItem item that before being updated.
45 * @param newItem item after being updated.
46 * @param position position where the item has been updated.
47 * @throws IllegalArgumentException if either the old or new item is null.
48 */
49 public UpdatedListItemChange(final T oldItem, final T newItem, final int position) {
50 super(ListItemChangeAction.UPDATED);
51 if (oldItem == null || newItem == null) {
52 throw new IllegalArgumentException();
53 }
54
55 this.oldItem = oldItem;
56 this.newItem = newItem;
57 this.position = position;
58 }
59
60 /**
61 * Returns the item that before being updated.
62 * @return the item that before being updated.
63 */
64 public T getOldItem() {
65 return oldItem;
66 }
67
68 /**
69 * Returns the item after being updated.
70 * @return the item after being updated.
71 */
72 public T getNewItem() {
73 return newItem;
74 }
75
76 /**
77 * Returns the position where the item has been updated.
78 * @return the position where the item has been updated.
79 */
80 public int getPosition() {
81 return position;
82 }
83 }