| /* |
| * Copyright (C) 2021 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.car.settings.enterprise; |
| |
| import android.annotation.Nullable; |
| import android.car.drivingstate.CarUxRestrictions; |
| import android.content.Context; |
| |
| import androidx.preference.Preference; |
| |
| import com.android.car.settings.common.FragmentController; |
| import com.android.car.settings.enterprise.CallbackTranslator.Callback; |
| import com.android.car.settingslib.applications.ApplicationFeatureProvider; |
| |
| /** |
| * Base class for async controllers. |
| */ |
| abstract class BaseAsyncPreferenceController<P extends Preference, R, |
| T extends CallbackTranslator<R>> extends BaseEnterprisePrivacyPreferenceController<P> { |
| |
| private R mResult; |
| |
| @Nullable |
| private T mCallbackTranslator; |
| |
| @Nullable |
| private Integer mAvailabilityStatus; |
| |
| protected BaseAsyncPreferenceController(Context context, |
| String preferenceKey, FragmentController fragmentController, |
| CarUxRestrictions uxRestrictions, |
| @Nullable ApplicationFeatureProvider applicationFeatureProvider) { |
| super(context, preferenceKey, fragmentController, uxRestrictions, |
| /* enterprisePrivacyFeatureProvider= */ null, applicationFeatureProvider); |
| } |
| |
| /** |
| * Calls the method that will lazy-load the counter. |
| */ |
| protected abstract void lazyLoad(T callbackHolder); |
| |
| /** |
| * Creates a translator between this class Callback and {@code SettingsLib}. |
| * @param callback |
| * @return |
| */ |
| protected abstract T newCallbackTranslator(Callback<R> callback); |
| |
| /** |
| * Checks if the result of the callback should make the controller available. |
| */ |
| protected abstract boolean isAvailable(R result); |
| |
| /** |
| * Gets the result returned by the callback. |
| */ |
| protected R getResult() { |
| return mResult; |
| } |
| |
| @Override |
| protected final int getAvailabilityStatus() { |
| if (mAvailabilityStatus != null) { |
| // Already calculated |
| mLogger.d("getAvailabilityStatus(): returning cached result " + mAvailabilityStatus); |
| return mAvailabilityStatus; |
| } |
| |
| if (mCallbackTranslator != null) { |
| mLogger.d("getAvailabilityStatus(): already waiting for callback..."); |
| } else { |
| mLogger.d("getAvailabilityStatus(): lazy-loading number of apps"); |
| mCallbackTranslator = newCallbackTranslator((result) -> onLazyLoaded(result)); |
| lazyLoad(mCallbackTranslator); |
| } |
| |
| // Calculating the number of apps can takes a bit of time, so we always return |
| // CONDITIONALLY_UNAVAILABLE, so the actual visibility will be set when the result is called |
| // back (on onLazyLoaded()). |
| return CONDITIONALLY_UNAVAILABLE; |
| } |
| |
| private void onLazyLoaded(R result) { |
| mResult = result; |
| boolean available = isAvailable(result); |
| mAvailabilityStatus = available |
| ? AVAILABLE |
| : DISABLED_FOR_PROFILE; |
| mLogger.d("onLazyLoaded(): result=" + result + ", available=" + available); |
| |
| if (available) { |
| refreshUi(); |
| } |
| } |
| } |