/* * Copyright (C) 2020 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.server.wifi.util; import android.annotation.Nullable; import android.content.Context; import android.net.wifi.WifiMigration; /** * Holder for storing the migration settings data retrieved from * {@link android.net.wifi.WifiMigration#loadFromSettings(Context)} to avoid invoking the method * multiple times. */ public class SettingsMigrationDataHolder { private final Context mContext; private WifiMigration.SettingsMigrationData mData = null; private boolean mRetrieved = false; public SettingsMigrationDataHolder(Context context) { mContext = context; } private void retrieveDataIfNecessary() { if (mRetrieved) return; mData = WifiMigration.loadFromSettings(mContext); mRetrieved = true; } /** * Retrieve the cached data returned from {@link WifiMigration#loadFromSettings(Context)}. */ @Nullable public WifiMigration.SettingsMigrationData retrieveData() { retrieveDataIfNecessary(); return mData; } }