1/*
2 * Copyright (C) 2014 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 android.support.v7.widget.util;
18
19import android.support.v7.util.SortedList;
20import android.support.v7.widget.RecyclerView;
21
22/**
23 * A {@link SortedList.Callback} implementation that can bind a {@link SortedList} to a
24 * {@link RecyclerView.Adapter}.
25 */
26public abstract class SortedListAdapterCallback<T2> extends SortedList.Callback<T2> {
27
28    final RecyclerView.Adapter mAdapter;
29
30    /**
31     * Creates a {@link SortedList.Callback} that will forward data change events to the provided
32     * Adapter.
33     *
34     * @param adapter The Adapter instance which should receive events from the SortedList.
35     */
36    public SortedListAdapterCallback(RecyclerView.Adapter adapter) {
37        mAdapter = adapter;
38    }
39
40    @Override
41    public void onInserted(int position, int count) {
42        mAdapter.notifyItemRangeInserted(position, count);
43    }
44
45    @Override
46    public void onRemoved(int position, int count) {
47        mAdapter.notifyItemRangeRemoved(position, count);
48    }
49
50    @Override
51    public void onMoved(int fromPosition, int toPosition) {
52        mAdapter.notifyItemMoved(fromPosition, toPosition);
53    }
54
55    @Override
56    public void onChanged(int position, int count) {
57        mAdapter.notifyItemRangeChanged(position, count);
58    }
59}
60