001 /* MidiDeviceProvider.java -- Abstract parent for a MIDI device provider.
002 Copyright (C) 2005 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
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012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
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017 along with GNU Classpath; see the file COPYING. If not, write to the
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019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
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036 exception statement from your version. */
037
038
039 package javax.sound.midi.spi;
040
041 import javax.sound.midi.*;
042
043 /**
044 * The abstract base class for all MidiDeviceProvider types.
045 *
046 * @author Anthony Green (green@redhat.com)
047 * @since 1.3
048 *
049 */
050 public abstract class MidiDeviceProvider
051 {
052 /**
053 * Returns true if this provider supports a specific MIDI device.
054 *
055 * @param info the MIDI device descriptor
056 * @return true if this provider supports info
057 */
058 public boolean isDeviceSupported(MidiDevice.Info info)
059 {
060 MidiDevice.Info infos[] = getDeviceInfo();
061
062 int i = infos.length;
063
064 while (i > 0)
065 {
066 if (info.equals(infos[--i]))
067 return true;
068 }
069
070 return false;
071 }
072
073 /**
074 * Get the list descriptors for all MIDI devices supported by
075 * this provider.
076 *
077 * @return an array of descriptors for all supported MIDI devices.
078 */
079 public abstract MidiDevice.Info[] getDeviceInfo();
080
081 /**
082 * Get the MidiDevice for the MIDI device described by info
083 *
084 * @param info the descriptor for the MIDI device we want
085 * @return the MidiDevice we're looking for
086 * @throws IllegalArgumentException is this provider doesn't support info
087 */
088 public abstract MidiDevice getDevice(MidiDevice.Info info)
089 throws IllegalArgumentException;
090 }