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 17 package android.media.midi; 18 19 /** 20 * Interface provided by a device to allow attaching 21 * MidiReceivers to a MIDI device. 22 */ 23 abstract 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
