| /* |
| * Copyright (C) 2022 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.internal.net.utils; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.provider.DeviceConfig; |
| |
| /** Utilities to query {@link DeviceConfig} and flags. */ |
| // TODO: Remove this class and statically include DeviceConfigUtils instead |
| public final class IkeDeviceConfigUtils { |
| /** |
| * Look up the value of a property for a particular namespace from {@link DeviceConfig}. |
| * |
| * @param namespace The namespace containing the property to look up. |
| * @param name The name of the property to look up. |
| * @param defaultValue The value to return if the property does not exist or its value is null. |
| * @return the corresponding value, or defaultValue if none exists. |
| */ |
| public static int getDeviceConfigPropertyInt( |
| @NonNull String namespace, @NonNull String name, int defaultValue) { |
| String value = getDeviceConfigProperty(namespace, name, null /* defaultValue */); |
| try { |
| return (value != null) ? Integer.parseInt(value) : defaultValue; |
| } catch (NumberFormatException e) { |
| return defaultValue; |
| } |
| } |
| |
| /** |
| * Look up the value of a property for a particular namespace from {@link DeviceConfig}. |
| * |
| * <p>Flags like timeouts should use this method and set an appropriate min/max range: if |
| * invalid values like "0" or "1" are pushed to devices, everything would timeout. The min/max |
| * range protects against this kind of breakage. |
| * |
| * @param namespace The namespace containing the property to look up. |
| * @param name The name of the property to look up. |
| * @param minimumValue The minimum value of a property. |
| * @param maximumValue The maximum value of a property. |
| * @param defaultValue The value to return if the property does not exist or its value is null. |
| * @return the corresponding value, or defaultValue if none exists or the fetched value is not |
| * in the provided range. |
| */ |
| public static int getDeviceConfigPropertyInt( |
| @NonNull String namespace, |
| @NonNull String name, |
| int minimumValue, |
| int maximumValue, |
| int defaultValue) { |
| int value = getDeviceConfigPropertyInt(namespace, name, defaultValue); |
| if (value < minimumValue || value > maximumValue) return defaultValue; |
| return value; |
| } |
| /** |
| * Look up the value of a property for a particular namespace from {@link DeviceConfig}. |
| * |
| * @param namespace The namespace containing the property to look up. |
| * @param name The name of the property to look up. |
| * @param defaultValue The value to return if the property does not exist or its value is null. |
| * @return the corresponding value, or defaultValue if none exists. |
| */ |
| public static boolean getDeviceConfigPropertyBoolean( |
| @NonNull String namespace, @NonNull String name, boolean defaultValue) { |
| String value = getDeviceConfigProperty(namespace, name, null /* defaultValue */); |
| return (value != null) ? Boolean.parseBoolean(value) : defaultValue; |
| } |
| |
| /** |
| * Look up the value of a property for a particular namespace from {@link DeviceConfig}. |
| * |
| * @param namespace The namespace containing the property to look up. |
| * @param name The name of the property to look up. |
| * @param defaultValue The value to return if the property does not exist or has no valid value. |
| * @return the corresponding value, or defaultValue if none exists. |
| */ |
| @Nullable |
| public static String getDeviceConfigProperty( |
| @NonNull String namespace, @NonNull String name, @Nullable String defaultValue) { |
| String value = DeviceConfig.getProperty(namespace, name); |
| return value != null ? value : defaultValue; |
| } |
| } |