1 /*
2  * Copyright (C) 2023 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.settings.development.graphicsdriver;
17 
18 import android.os.SystemProperties;
19 
20 import androidx.annotation.NonNull;
21 import androidx.annotation.Nullable;
22 /**
23  * Wrapper interface to access {@link SystemProperties}.
24  *
25  * @hide
26  */
27 interface GraphicsDriverSystemPropertiesWrapper {
28     /**
29      * Get the String value for the given {@code key}.
30      *
31      * @param key the key to lookup
32      * @param def the default value in case the property is not set or empty
33      * @return if the {@code key} isn't found, return {@code def} if it isn't null, or an empty
34      * string otherwise
35      */
36     @NonNull
get(@onNull String key, @Nullable String def)37     String get(@NonNull String key, @Nullable String def);
38     /**
39      * Set the value for the given {@code key} to {@code val}.
40      *
41      * @throws IllegalArgumentException if the {@code val} exceeds 91 characters
42      * @throws RuntimeException if the property cannot be set, for example, if it was blocked by
43      * SELinux. libc will log the underlying reason.
44      */
set(@onNull String key, @Nullable String val)45     void set(@NonNull String key, @Nullable String val);
46 
47     /**
48      * Get the boolean value for the given {@code key}.
49      *
50      * @param key the key to lookup
51      * @param def the default value in case the property is not set or empty
52      * @return if the {@code key} isn't found, return {@code def}.
53      */
getBoolean(@onNull String key, @NonNull boolean def)54     boolean getBoolean(@NonNull String key, @NonNull boolean def);
55 }
56