1 /*
2  * Copyright (C) 2017 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 package com.android.documentsui.dirlist;
17 
18 import static androidx.core.util.Preconditions.checkArgument;
19 
20 import com.android.documentsui.DocsSelectionHelper.StableIdProvider;
21 
22 /**
23  * Provides RecyclerView selection code access to stable ids backed
24  * by DocumentsAdapter.
25  */
26 public final class DocsStableIdProvider extends StableIdProvider {
27 
28     private final DocumentsAdapter mAdapter;
29 
DocsStableIdProvider(DocumentsAdapter adapter)30     public DocsStableIdProvider(DocumentsAdapter adapter) {
31         checkArgument(adapter != null);
32         mAdapter = adapter;
33     }
34 
35     @Override
getKey(int position)36     public String getKey(int position) {
37         return mAdapter.getStableId(position);
38     }
39 
40     @Override
getPosition(String id)41     public int getPosition(String id) {
42         return mAdapter.getPosition(id);
43     }
44 }
45