1/*
2 * Copyright (C) 2014 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 android.media.midi;
18
19/**
20 * Interface provided by a device to allow attaching
21 * MidiReceivers to a MIDI device.
22 */
23abstract public class MidiSender {
24
25    /**
26     * Connects a {@link MidiReceiver} to the sender
27     *
28     * @param receiver the receiver to connect
29     */
30    public void connect(MidiReceiver receiver) {
31        if (receiver == null) {
32            throw new NullPointerException("receiver null in MidiSender.connect");
33        }
34        onConnect(receiver);
35    }
36
37    /**
38     * Disconnects a {@link MidiReceiver} from the sender
39     *
40     * @param receiver the receiver to disconnect
41     */
42    public void disconnect(MidiReceiver receiver) {
43        if (receiver == null) {
44            throw new NullPointerException("receiver null in MidiSender.disconnect");
45        }
46        onDisconnect(receiver);
47    }
48
49    /**
50     * Called to connect a {@link MidiReceiver} to the sender
51     *
52     * @param receiver the receiver to connect
53     */
54    abstract public void onConnect(MidiReceiver receiver);
55
56    /**
57     * Called to disconnect a {@link MidiReceiver} from the sender
58     *
59     * @param receiver the receiver to disconnect
60     */
61    abstract public void onDisconnect(MidiReceiver receiver);
62}
63