| /* |
| * Copyright (C) 2019 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.systemui; |
| |
| import android.app.Activity; |
| import android.app.Service; |
| |
| import java.util.Map; |
| |
| import javax.inject.Inject; |
| import javax.inject.Provider; |
| import javax.inject.Singleton; |
| |
| /** |
| * Used during Service and Activity instantiation to make them injectable. |
| */ |
| @Singleton |
| public class ContextComponentResolver implements ContextComponentHelper { |
| private final Map<Class<?>, Provider<Activity>> mActivityCreators; |
| private final Map<Class<?>, Provider<Service>> mServiceCreators; |
| private final Map<Class<?>, Provider<SystemUI>> mSystemUICreators; |
| |
| @Inject |
| ContextComponentResolver( |
| Map<Class<?>, Provider<Activity>> activityCreators, |
| Map<Class<?>, Provider<Service>> serviceCreators, |
| Map<Class<?>, Provider<SystemUI>> systemUICreators) { |
| mActivityCreators = activityCreators; |
| mServiceCreators = serviceCreators; |
| mSystemUICreators = systemUICreators; |
| } |
| |
| /** |
| * Looks up the Activity class name to see if Dagger has an instance of it. |
| */ |
| @Override |
| public Activity resolveActivity(String className) { |
| return resolve(className, mActivityCreators); |
| } |
| |
| /** |
| * Looks up the Service class name to see if Dagger has an instance of it. |
| */ |
| @Override |
| public Service resolveService(String className) { |
| return resolve(className, mServiceCreators); |
| } |
| |
| /** |
| * Looks up the SystemUI class name to see if Dagger has an instance of it. |
| */ |
| @Override |
| public SystemUI resolveSystemUI(String className) { |
| return resolve(className, mSystemUICreators); |
| } |
| |
| private <T> T resolve(String className, Map<Class<?>, Provider<T>> creators) { |
| try { |
| Class<?> clazz = Class.forName(className); |
| Provider<T> provider = creators.get(clazz); |
| return provider == null ? null : provider.get(); |
| } catch (ClassNotFoundException e) { |
| return null; |
| } |
| } |
| } |