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