1/*
2 * Copyright (C) 2015 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.v4.content;
18
19import android.content.SharedPreferences;
20import android.os.Build;
21import android.support.annotation.NonNull;
22
23public final class SharedPreferencesCompat {
24
25    public final static class EditorCompat {
26
27        private static EditorCompat sInstance;
28
29        private interface Helper {
30            void apply(@NonNull SharedPreferences.Editor editor);
31        }
32
33        private static class EditorHelperBaseImpl implements Helper {
34
35            @Override
36            public void apply(@NonNull SharedPreferences.Editor editor) {
37                editor.commit();
38            }
39        }
40
41        private static class EditorHelperApi9Impl implements Helper {
42
43            @Override
44            public void apply(@NonNull SharedPreferences.Editor editor) {
45                EditorCompatGingerbread.apply(editor);
46            }
47        }
48
49        private final Helper mHelper;
50
51        private EditorCompat() {
52            if (Build.VERSION.SDK_INT >= 9) {
53                mHelper = new EditorHelperApi9Impl();
54            } else {
55                mHelper = new EditorHelperBaseImpl();
56            }
57        }
58
59        public static EditorCompat getInstance() {
60            if (sInstance == null) {
61                sInstance = new EditorCompat();
62            }
63            return sInstance;
64        }
65
66        public void apply(@NonNull SharedPreferences.Editor editor) {
67            mHelper.apply(editor);
68        }
69    }
70
71    private SharedPreferencesCompat() {}
72
73}
74