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 com.android.layoutlib.bridge.android;
18
19import android.content.SharedPreferences;
20
21import java.util.Map;
22import java.util.Set;
23
24/**
25 * An empty shared preferences implementation which doesn't store anything. It always returns
26 * null, 0 or false.
27 */
28public class BridgeSharedPreferences implements SharedPreferences {
29    private Editor mEditor;
30
31    @Override
32    public Map<String, ?> getAll() {
33        return null;
34    }
35
36    @Override
37    public String getString(String key, String defValue) {
38        return null;
39    }
40
41    @Override
42    public Set<String> getStringSet(String key, Set<String> defValues) {
43        return null;
44    }
45
46    @Override
47    public int getInt(String key, int defValue) {
48        return 0;
49    }
50
51    @Override
52    public long getLong(String key, long defValue) {
53        return 0;
54    }
55
56    @Override
57    public float getFloat(String key, float defValue) {
58        return 0;
59    }
60
61    @Override
62    public boolean getBoolean(String key, boolean defValue) {
63        return false;
64    }
65
66    @Override
67    public boolean contains(String key) {
68        return false;
69    }
70
71    @Override
72    public Editor edit() {
73        if (mEditor != null) {
74            return mEditor;
75        }
76        mEditor = new Editor() {
77            @Override
78            public Editor putString(String key, String value) {
79                return null;
80            }
81
82            @Override
83            public Editor putStringSet(String key, Set<String> values) {
84                return null;
85            }
86
87            @Override
88            public Editor putInt(String key, int value) {
89                return null;
90            }
91
92            @Override
93            public Editor putLong(String key, long value) {
94                return null;
95            }
96
97            @Override
98            public Editor putFloat(String key, float value) {
99                return null;
100            }
101
102            @Override
103            public Editor putBoolean(String key, boolean value) {
104                return null;
105            }
106
107            @Override
108            public Editor remove(String key) {
109                return null;
110            }
111
112            @Override
113            public Editor clear() {
114                return null;
115            }
116
117            @Override
118            public boolean commit() {
119                return false;
120            }
121
122            @Override
123            public void apply() {
124            }
125        };
126        return mEditor;
127    }
128
129    @Override
130    public void registerOnSharedPreferenceChangeListener(
131            OnSharedPreferenceChangeListener listener) {
132    }
133
134    @Override
135    public void unregisterOnSharedPreferenceChangeListener(
136            OnSharedPreferenceChangeListener listener) {
137    }
138}
139