1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.accessorydisplay.common;
18
19import com.android.accessorydisplay.common.Transport;
20
21import android.content.Context;
22import android.os.Looper;
23
24import java.nio.ByteBuffer;
25
26/**
27 * Base implementation of a service that communicates over a transport.
28 * <p>
29 * This object's interface is single-threaded.  It is only intended to be
30 * accessed from the {@link Looper} thread on which the transport was created.
31 * </p>
32 */
33public abstract class Service implements Transport.Callback {
34    private final Context mContext;
35    private final Transport mTransport;
36    private final int mServiceId;
37
38    public Service(Context context, Transport transport, int serviceId) {
39        mContext = context;
40        mTransport = transport;
41        mServiceId = serviceId;
42    }
43
44    public Context getContext() {
45        return mContext;
46    }
47
48    public int getServiceId() {
49        return mServiceId;
50    }
51
52    public Transport getTransport() {
53        return mTransport;
54    }
55
56    public Logger getLogger() {
57        return mTransport.getLogger();
58    }
59
60    public void start() {
61        mTransport.registerService(mServiceId, this);
62    }
63
64    public void stop() {
65        mTransport.unregisterService(mServiceId);
66    }
67
68    @Override
69    public void onMessageReceived(int service, int what, ByteBuffer content) {
70    }
71}
72