| /* |
| * Copyright (C) 2017 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.internal; |
| |
| import android.os.Handler; |
| import android.os.Handler.Callback; |
| import android.os.Looper; |
| import android.os.Message; |
| |
| import java.util.List; |
| import java.util.function.Consumer; |
| |
| /** |
| * Handles call back into clients for Car managers. |
| * @hide |
| */ |
| public abstract class SingleMessageHandler<EventType> implements Callback { |
| private final int mHandledMessageWhat; |
| private final Handler mHandler; |
| |
| public SingleMessageHandler(Looper looper, int handledMessage) { |
| mHandledMessageWhat = handledMessage; |
| mHandler = new Handler(looper, this); |
| } |
| |
| public SingleMessageHandler(Handler handler, int handledMessage) { |
| this(handler.getLooper(), handledMessage); |
| } |
| |
| protected abstract void handleEvent(EventType event); |
| |
| @Override |
| public boolean handleMessage(Message msg) { |
| if (msg.what == mHandledMessageWhat) { |
| List<EventType> events = (List<EventType>) msg.obj; |
| events.forEach(new Consumer<EventType>() { |
| @Override |
| public void accept(EventType event) { |
| handleEvent(event); |
| } |
| }); |
| } |
| |
| return true; |
| } |
| |
| public void sendEvents(List<EventType> events) { |
| mHandler.sendMessage(mHandler.obtainMessage(mHandledMessageWhat, events)); |
| } |
| |
| } |