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/*
* 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.Application;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.ContentProvider;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.app.AppComponentFactory;
import com.android.systemui.dagger.ContextComponentHelper;
import com.android.systemui.dagger.SysUIComponent;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import javax.inject.Inject;
/**
* Implementation of AppComponentFactory that injects into constructors.
*
* This class sets up dependency injection when creating our application.
*
* Services support dependency injection into their constructors.
*
* ContentProviders support injection into member variables - _not_ constructors.
*/
public class SystemUIAppComponentFactory extends AppComponentFactory {
private static final String TAG = "AppComponentFactory";
@Inject
public ContextComponentHelper mComponentHelper;
public SystemUIAppComponentFactory() {
super();
}
@NonNull
@Override
public Application instantiateApplicationCompat(
@NonNull ClassLoader cl, @NonNull String className)
throws InstantiationException, IllegalAccessException, ClassNotFoundException {
Application app = super.instantiateApplicationCompat(cl, className);
if (app instanceof ContextInitializer) {
((ContextInitializer) app).setContextAvailableCallback(
context -> {
SystemUIFactory.createFromConfig(context);
SystemUIFactory.getInstance().getSysUIComponent().inject(
SystemUIAppComponentFactory.this);
}
);
}
return app;
}
@NonNull
@Override
public ContentProvider instantiateProviderCompat(
@NonNull ClassLoader cl, @NonNull String className)
throws InstantiationException, IllegalAccessException, ClassNotFoundException {
ContentProvider contentProvider = super.instantiateProviderCompat(cl, className);
if (contentProvider instanceof ContextInitializer) {
((ContextInitializer) contentProvider).setContextAvailableCallback(
context -> {
SystemUIFactory.createFromConfig(context);
SysUIComponent rootComponent =
SystemUIFactory.getInstance().getSysUIComponent();
try {
Method injectMethod = rootComponent.getClass()
.getMethod("inject", contentProvider.getClass());
injectMethod.invoke(rootComponent, contentProvider);
} catch (NoSuchMethodException
| IllegalAccessException
| InvocationTargetException e) {
Log.w(TAG, "No injector for class: " + contentProvider.getClass(), e);
}
}
);
}
return contentProvider;
}
@NonNull
@Override
public Activity instantiateActivityCompat(@NonNull ClassLoader cl, @NonNull String className,
@Nullable Intent intent)
throws InstantiationException, IllegalAccessException, ClassNotFoundException {
if (mComponentHelper == null) {
// This shouldn't happen, but is seen on occasion.
// Bug filed against framework to take a look: http://b/141008541
SystemUIFactory.getInstance().getSysUIComponent().inject(
SystemUIAppComponentFactory.this);
}
Activity activity = mComponentHelper.resolveActivity(className);
if (activity != null) {
return activity;
}
return super.instantiateActivityCompat(cl, className, intent);
}
@NonNull
@Override
public Service instantiateServiceCompat(
@NonNull ClassLoader cl, @NonNull String className, Intent intent)
throws InstantiationException, IllegalAccessException, ClassNotFoundException {
if (mComponentHelper == null) {
// This shouldn't happen, but does when a device is freshly formatted.
// Bug filed against framework to take a look: http://b/141008541
SystemUIFactory.getInstance().getSysUIComponent().inject(
SystemUIAppComponentFactory.this);
}
Service service = mComponentHelper.resolveService(className);
if (service != null) {
return service;
}
return super.instantiateServiceCompat(cl, className, intent);
}
@NonNull
@Override
public BroadcastReceiver instantiateReceiverCompat(@NonNull ClassLoader cl,
@NonNull String className, @Nullable Intent intent)
throws InstantiationException, IllegalAccessException, ClassNotFoundException {
if (mComponentHelper == null) {
// This shouldn't happen, but does when a device is freshly formatted.
// Bug filed against framework to take a look: http://b/141008541
SystemUIFactory.getInstance().getSysUIComponent().inject(
SystemUIAppComponentFactory.this);
}
BroadcastReceiver receiver = mComponentHelper.resolveBroadcastReceiver(className);
if (receiver != null) {
return receiver;
}
return super.instantiateReceiverCompat(cl, className, intent);
}
/**
* A callback that receives a Context when one is ready.
*/
public interface ContextAvailableCallback {
void onContextAvailable(Context context);
}
/**
* Implemented in classes that get started by the system before a context is available.
*/
public interface ContextInitializer {
void setContextAvailableCallback(ContextAvailableCallback callback);
}
}
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