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 UpdatedCollectionItemChange<T> extends CollectionItemChange {
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 * Constructor.
38 *
39 * @param oldItem item that before being updated.
40 * @param newItem item after being updated.
41 * @throws IllegalArgumentException if either the old or new item is null.
42 */
43 public UpdatedCollectionItemChange(final T oldItem, final T newItem) {
44 super(CollectionItemChangeAction.UPDATED);
45 if (oldItem == null || newItem == null) {
46 throw new IllegalArgumentException();
47 }
48
49 this.oldItem = oldItem;
50 this.newItem = newItem;
51 }
52
53 /**
54 * Returns the item that before being updated.
55 * @return the item that before being updated.
56 */
57 public T getOldItem() {
58 return oldItem;
59 }
60
61 /**
62 * Returns the item that after being updated.
63 * @return the item that after being updated.
64 */
65 public T getNewItem() {
66 return newItem;
67 }
68 }