1/*
2 * Copyright 2018 The Android Open Source Project
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
17package androidx.recyclerview.widget;
18
19/**
20 * A {@link SortedList.Callback} implementation that can bind a {@link SortedList} to a
21 * {@link RecyclerView.Adapter}.
22 */
23public abstract class SortedListAdapterCallback<T2> extends SortedList.Callback<T2> {
24
25    final RecyclerView.Adapter mAdapter;
26
27    /**
28     * Creates a {@link SortedList.Callback} that will forward data change events to the provided
29     * Adapter.
30     *
31     * @param adapter The Adapter instance which should receive events from the SortedList.
32     */
33    public SortedListAdapterCallback(RecyclerView.Adapter adapter) {
34        mAdapter = adapter;
35    }
36
37    @Override
38    public void onInserted(int position, int count) {
39        mAdapter.notifyItemRangeInserted(position, count);
40    }
41
42    @Override
43    public void onRemoved(int position, int count) {
44        mAdapter.notifyItemRangeRemoved(position, count);
45    }
46
47    @Override
48    public void onMoved(int fromPosition, int toPosition) {
49        mAdapter.notifyItemMoved(fromPosition, toPosition);
50    }
51
52    @Override
53    public void onChanged(int position, int count) {
54        mAdapter.notifyItemRangeChanged(position, count);
55    }
56
57    @Override
58    public void onChanged(int position, int count, Object payload) {
59        mAdapter.notifyItemRangeChanged(position, count, payload);
60    }
61}
62