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| 1 | /* | ||
| 2 | * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package javax.sound.midi; | ||
| 27 | |||
| 28 | import java.io.FileInputStream; | ||
| 29 | import java.io.File; | ||
| 30 | import java.io.InputStream; | ||
| 31 | import java.io.OutputStream; | ||
| 32 | import java.io.IOException; | ||
| 33 | |||
| 34 | import java.util.ArrayList; | ||
| 35 | import java.util.HashSet; | ||
| 36 | import java.util.Iterator; | ||
| 37 | import java.util.List; | ||
| 38 | import java.util.Set; | ||
| 39 | |||
| 40 | import java.net.URL; | ||
| 41 | |||
| 42 | import javax.sound.midi.spi.MidiFileWriter; | ||
| 43 | import javax.sound.midi.spi.MidiFileReader; | ||
| 44 | import javax.sound.midi.spi.SoundbankReader; | ||
| 45 | import javax.sound.midi.spi.MidiDeviceProvider; | ||
| 46 | |||
| 47 | import com.sun.media.sound.JDK13Services; | ||
| 48 | import com.sun.media.sound.ReferenceCountingDevice; | ||
| 49 | import com.sun.media.sound.AutoConnectSequencer; | ||
| 50 | import com.sun.media.sound.MidiDeviceReceiverEnvelope; | ||
| 51 | import com.sun.media.sound.MidiDeviceTransmitterEnvelope; | ||
| 52 | |||
| 53 | |||
| 54 | /** | ||
| 55 | * The <code>MidiSystem</code> class provides access to the installed MIDI | ||
| 56 | * system resources, including devices such as synthesizers, sequencers, and | ||
| 57 | * MIDI input and output ports. A typical simple MIDI application might | ||
| 58 | * begin by invoking one or more <code>MidiSystem</code> methods to learn | ||
| 59 | * what devices are installed and to obtain the ones needed in that | ||
| 60 | * application. | ||
| 61 | * <p> | ||
| 62 | * The class also has methods for reading files, streams, and URLs that | ||
| 63 | * contain standard MIDI file data or soundbanks. You can query the | ||
| 64 | * <code>MidiSystem</code> for the format of a specified MIDI file. | ||
| 65 | * <p> | ||
| 66 | * You cannot instantiate a <code>MidiSystem</code>; all the methods are | ||
| 67 | * static. | ||
| 68 | * | ||
| 69 | * <p>Properties can be used to specify default MIDI devices. | ||
| 70 | * Both system properties and a properties file are considered. | ||
| 71 | * The properties file is "lib/sound.properties" in the JRE | ||
| 72 | * directory. If a property exists both as a system property and in the | ||
| 73 | * properties file, the system property takes precedence. If none is | ||
| 74 | * specified, a suitable default is chosen among the available devices. | ||
| 75 | * The syntax of the properties file is specified in | ||
| 76 | * {@link java.util.Properties#load(InputStream) Properties.load}. The | ||
| 77 | * following table lists the available property keys and which methods | ||
| 78 | * consider them: | ||
| 79 | * | ||
| 80 | * <table border=0> | ||
| 81 | * <tr> | ||
| 82 | * <th>Property Key</th> | ||
| 83 | * <th>Interface</th> | ||
| 84 | * <th>Affected Method</th> | ||
| 85 | * </tr> | ||
| 86 | * <tr> | ||
| 87 | * <td><code>javax.sound.midi.Receiver</code></td> | ||
| 88 | * <td>{@link Receiver}</td> | ||
| 89 | * <td>{@link #getReceiver}</td> | ||
| 90 | * </tr> | ||
| 91 | * <tr> | ||
| 92 | * <td><code>javax.sound.midi.Sequencer</code></td> | ||
| 93 | * <td>{@link Sequencer}</td> | ||
| 94 | * <td>{@link #getSequencer}</td> | ||
| 95 | * </tr> | ||
| 96 | * <tr> | ||
| 97 | * <td><code>javax.sound.midi.Synthesizer</code></td> | ||
| 98 | * <td>{@link Synthesizer}</td> | ||
| 99 | * <td>{@link #getSynthesizer}</td> | ||
| 100 | * </tr> | ||
| 101 | * <tr> | ||
| 102 | * <td><code>javax.sound.midi.Transmitter</code></td> | ||
| 103 | * <td>{@link Transmitter}</td> | ||
| 104 | * <td>{@link #getTransmitter}</td> | ||
| 105 | * </tr> | ||
| 106 | * </table> | ||
| 107 | * | ||
| 108 | * The property value consists of the provider class name | ||
| 109 | * and the device name, separated by the hash mark ("#"). | ||
| 110 | * The provider class name is the fully-qualified | ||
| 111 | * name of a concrete {@link javax.sound.midi.spi.MidiDeviceProvider | ||
| 112 | * MIDI device provider} class. The device name is matched against | ||
| 113 | * the <code>String</code> returned by the <code>getName</code> | ||
| 114 | * method of <code>MidiDevice.Info</code>. | ||
| 115 | * Either the class name, or the device name may be omitted. | ||
| 116 | * If only the class name is specified, the trailing hash mark | ||
| 117 | * is optional. | ||
| 118 | * | ||
| 119 | * <p>If the provider class is specified, and it can be | ||
| 120 | * successully retrieved from the installed providers, | ||
| 121 | * the list of | ||
| 122 | * <code>MidiDevice.Info</code> objects is retrieved | ||
| 123 | * from the provider. Otherwise, or when these devices | ||
| 124 | * do not provide a subsequent match, the list is retrieved | ||
| 125 | * from {@link #getMidiDeviceInfo} to contain | ||
| 126 | * all available <code>MidiDevice.Info</code> objects. | ||
| 127 | * | ||
| 128 | * <p>If a device name is specified, the resulting list of | ||
| 129 | * <code>MidiDevice.Info</code> objects is searched: | ||
| 130 | * the first one with a matching name, and whose | ||
| 131 | * <code>MidiDevice</code> implements the | ||
| 132 | * respective interface, will be returned. | ||
| 133 | * If no matching <code>MidiDevice.Info</code> object | ||
| 134 | * is found, or the device name is not specified, | ||
| 135 | * the first suitable device from the resulting | ||
| 136 | * list will be returned. For Sequencer and Synthesizer, | ||
| 137 | * a device is suitable if it implements the respective | ||
| 138 | * interface; whereas for Receiver and Transmitter, a device is | ||
| 139 | * suitable if it | ||
| 140 | * implements neither Sequencer nor Synthesizer and provides | ||
| 141 | * at least one Receiver or Transmitter, respectively. | ||
| 142 | * | ||
| 143 | * For example, the property <code>javax.sound.midi.Receiver</code> | ||
| 144 | * with a value | ||
| 145 | * <code>"com.sun.media.sound.MidiProvider#SunMIDI1"</code> | ||
| 146 | * will have the following consequences when | ||
| 147 | * <code>getReceiver</code> is called: | ||
| 148 | * if the class <code>com.sun.media.sound.MidiProvider</code> exists | ||
| 149 | * in the list of installed MIDI device providers, | ||
| 150 | * the first <code>Receiver</code> device with name | ||
| 151 | * <code>"SunMIDI1"</code> will be returned. If it cannot | ||
| 152 | * be found, the first <code>Receiver</code> from that provider | ||
| 153 | * will be returned, regardless of name. | ||
| 154 | * If there is none, the first <code>Receiver</code> with name | ||
| 155 | * <code>"SunMIDI1"</code> in the list of all devices | ||
| 156 | * (as returned by <code>getMidiDeviceInfo</code>) will be returned, | ||
| 157 | * or, if not found, the first <code>Receiver</code> that can | ||
| 158 | * be found in the list of all devices is returned. | ||
| 159 | * If that fails, too, a <code>MidiUnavailableException</code> | ||
| 160 | * is thrown. | ||
| 161 | * | ||
| 162 | * @author Kara Kytle | ||
| 163 | * @author Florian Bomers | ||
| 164 | * @author Matthias Pfisterer | ||
| 165 | */ | ||
| 166 | public class MidiSystem { | ||
| 167 | |||
| 168 | /** | ||
| 169 | * Private no-args constructor for ensuring against instantiation. | ||
| 170 | */ | ||
| 171 | private MidiSystem() { | ||
| 172 | } | ||
| 173 | |||
| 174 | |||
| 175 | /** | ||
| 176 | * Obtains an array of information objects representing | ||
| 177 | * the set of all MIDI devices available on the system. | ||
| 178 | * A returned information object can then be used to obtain the | ||
| 179 | * corresponding device object, by invoking | ||
| 180 | * {@link #getMidiDevice(MidiDevice.Info) getMidiDevice}. | ||
| 181 | * | ||
| 182 | * @return an array of <code>MidiDevice.Info</code> objects, one | ||
| 183 | * for each installed MIDI device. If no such devices are installed, | ||
| 184 | * an array of length 0 is returned. | ||
| 185 | */ | ||
| 186 | public static MidiDevice.Info[] getMidiDeviceInfo() { | ||
| 187 | List allInfos = new ArrayList(); | ||
| 188 | List providers = getMidiDeviceProviders(); | ||
| 189 | |||
| 190 | for(int i = 0; i < providers.size(); i++) { | ||
| 191 | MidiDeviceProvider provider = (MidiDeviceProvider) providers.get(i); | ||
| 192 | MidiDevice.Info[] tmpinfo = provider.getDeviceInfo(); | ||
| 193 | for (int j = 0; j < tmpinfo.length; j++) { | ||
| 194 | allInfos.add( tmpinfo[j] ); | ||
| 195 | } | ||
| 196 | } | ||
| 197 | MidiDevice.Info[] infosArray = (MidiDevice.Info[]) allInfos.toArray(new MidiDevice.Info[0]); | ||
| 198 | return infosArray; | ||
| 199 | } | ||
| 200 | |||
| 201 | |||
| 202 | /** | ||
| 203 | * Obtains the requested MIDI device. | ||
| 204 | * | ||
| 205 | * @param info a device information object representing the desired device. | ||
| 206 | * @return the requested device | ||
| 207 | * @throws MidiUnavailableException if the requested device is not available | ||
| 208 | * due to resource restrictions | ||
| 209 | * @throws IllegalArgumentException if the info object does not represent | ||
| 210 | * a MIDI device installed on the system | ||
| 211 | * @see #getMidiDeviceInfo | ||
| 212 | */ | ||
| 213 | public static MidiDevice getMidiDevice(MidiDevice.Info info) throws MidiUnavailableException { | ||
| 214 | List providers = getMidiDeviceProviders(); | ||
| 215 | |||
| 216 | for(int i = 0; i < providers.size(); i++) { | ||
| 217 | MidiDeviceProvider provider = (MidiDeviceProvider) providers.get(i); | ||
| 218 | if (provider.isDeviceSupported(info)) { | ||
| 219 | MidiDevice device = provider.getDevice(info); | ||
| 220 | return device; | ||
| 221 | } | ||
| 222 | } | ||
| 223 | throw new IllegalArgumentException("Requested device not installed: " + info); | ||
| 224 | } | ||
| 225 | |||
| 226 | |||
| 227 | /** | ||
| 228 | * Obtains a MIDI receiver from an external MIDI port | ||
| 229 | * or other default device. | ||
| 230 | * The returned receiver always implements | ||
| 231 | * the {@code MidiDeviceReceiver} interface. | ||
| 232 | * | ||
| 233 | * <p>If the system property | ||
| 234 | * <code>javax.sound.midi.Receiver</code> | ||
| 235 | * is defined or it is defined in the file "sound.properties", | ||
| 236 | * it is used to identify the device that provides the default receiver. | ||
| 237 | * For details, refer to the {@link MidiSystem class description}. | ||
| 238 | * | ||
| 239 | * If a suitable MIDI port is not available, the Receiver is | ||
| 240 | * retrieved from an installed synthesizer. | ||
| 241 | * | ||
| 242 | * <p>If a native receiver provided by the default device does not implement | ||
| 243 | * the {@code MidiDeviceReceiver} interface, it will be wrapped in a | ||
| 244 | * wrapper class that implements the {@code MidiDeviceReceiver} interface. | ||
| 245 | * The corresponding {@code Receiver} method calls will be forwarded | ||
| 246 | * to the native receiver. | ||
| 247 | * | ||
| 248 | * <p>If this method returns successfully, the {@link | ||
| 249 | * javax.sound.midi.MidiDevice MidiDevice} the | ||
| 250 | * <code>Receiver</code> belongs to is opened implicitly, if it is | ||
| 251 | * not already open. It is possible to close an implicitly opened | ||
| 252 | * device by calling {@link javax.sound.midi.Receiver#close close} | ||
| 253 | * on the returned <code>Receiver</code>. All open <code>Receiver</code> | ||
| 254 | * instances have to be closed in order to release system resources | ||
| 255 | * hold by the <code>MidiDevice</code>. For a | ||
| 256 | * detailed description of open/close behaviour see the class | ||
| 257 | * description of {@link javax.sound.midi.MidiDevice MidiDevice}. | ||
| 258 | * | ||
| 259 | * | ||
| 260 | * @return the default MIDI receiver | ||
| 261 | * @throws MidiUnavailableException if the default receiver is not | ||
| 262 | * available due to resource restrictions, | ||
| 263 | * or no device providing receivers is installed in the system | ||
| 264 | */ | ||
| 265 | public static Receiver getReceiver() throws MidiUnavailableException { | ||
| 266 | // may throw MidiUnavailableException | ||
| 267 | MidiDevice device = getDefaultDeviceWrapper(Receiver.class); | ||
| 268 | Receiver receiver; | ||
| 269 | if (device instanceof ReferenceCountingDevice) { | ||
| 270 | receiver = ((ReferenceCountingDevice) device).getReceiverReferenceCounting(); | ||
| 271 | } else { | ||
| 272 | receiver = device.getReceiver(); | ||
| 273 | } | ||
| 274 | if (!(receiver instanceof MidiDeviceReceiver)) { | ||
| 275 | receiver = new MidiDeviceReceiverEnvelope(device, receiver); | ||
| 276 | } | ||
| 277 | return receiver; | ||
| 278 | } | ||
| 279 | |||
| 280 | |||
| 281 | /** | ||
| 282 | * Obtains a MIDI transmitter from an external MIDI port | ||
| 283 | * or other default source. | ||
| 284 | * The returned transmitter always implements | ||
| 285 | * the {@code MidiDeviceTransmitter} interface. | ||
| 286 | * | ||
| 287 | * <p>If the system property | ||
| 288 | * <code>javax.sound.midi.Transmitter</code> | ||
| 289 | * is defined or it is defined in the file "sound.properties", | ||
| 290 | * it is used to identify the device that provides the default transmitter. | ||
| 291 | * For details, refer to the {@link MidiSystem class description}. | ||
| 292 | * | ||
| 293 | * <p>If a native transmitter provided by the default device does not implement | ||
| 294 | * the {@code MidiDeviceTransmitter} interface, it will be wrapped in a | ||
| 295 | * wrapper class that implements the {@code MidiDeviceTransmitter} interface. | ||
| 296 | * The corresponding {@code Transmitter} method calls will be forwarded | ||
| 297 | * to the native transmitter. | ||
| 298 | * | ||
| 299 | * <p>If this method returns successfully, the {@link | ||
| 300 | * javax.sound.midi.MidiDevice MidiDevice} the | ||
| 301 | * <code>Transmitter</code> belongs to is opened implicitly, if it | ||
| 302 | * is not already open. It is possible to close an implicitly | ||
| 303 | * opened device by calling {@link | ||
| 304 | * javax.sound.midi.Transmitter#close close} on the returned | ||
| 305 | * <code>Transmitter</code>. All open <code>Transmitter</code> | ||
| 306 | * instances have to be closed in order to release system resources | ||
| 307 | * hold by the <code>MidiDevice</code>. For a detailed description | ||
| 308 | * of open/close behaviour see the class description of {@link | ||
| 309 | * javax.sound.midi.MidiDevice MidiDevice}. | ||
| 310 | * | ||
| 311 | * @return the default MIDI transmitter | ||
| 312 | * @throws MidiUnavailableException if the default transmitter is not | ||
| 313 | * available due to resource restrictions, | ||
| 314 | * or no device providing transmitters is installed in the system | ||
| 315 | */ | ||
| 316 | public static Transmitter getTransmitter() throws MidiUnavailableException { | ||
| 317 | // may throw MidiUnavailableException | ||
| 318 | MidiDevice device = getDefaultDeviceWrapper(Transmitter.class); | ||
| 319 | Transmitter transmitter; | ||
| 320 | if (device instanceof ReferenceCountingDevice) { | ||
| 321 | transmitter = ((ReferenceCountingDevice) device).getTransmitterReferenceCounting(); | ||
| 322 | } else { | ||
| 323 | transmitter = device.getTransmitter(); | ||
| 324 | } | ||
| 325 | if (!(transmitter instanceof MidiDeviceTransmitter)) { | ||
| 326 | transmitter = new MidiDeviceTransmitterEnvelope(device, transmitter); | ||
| 327 | } | ||
| 328 | return transmitter; | ||
| 329 | } | ||
| 330 | |||
| 331 | |||
| 332 | /** | ||
| 333 | * Obtains the default synthesizer. | ||
| 334 | * | ||
| 335 | * <p>If the system property | ||
| 336 | * <code>javax.sound.midi.Synthesizer</code> | ||
| 337 | * is defined or it is defined in the file "sound.properties", | ||
| 338 | * it is used to identify the default synthesizer. | ||
| 339 | * For details, refer to the {@link MidiSystem class description}. | ||
| 340 | * | ||
| 341 | * @return the default synthesizer | ||
| 342 | * @throws MidiUnavailableException if the synthesizer is not | ||
| 343 | * available due to resource restrictions, | ||
| 344 | * or no synthesizer is installed in the system | ||
| 345 | */ | ||
| 346 | public static Synthesizer getSynthesizer() throws MidiUnavailableException { | ||
| 347 | // may throw MidiUnavailableException | ||
| 348 | return (Synthesizer) getDefaultDeviceWrapper(Synthesizer.class); | ||
| 349 | } | ||
| 350 | |||
| 351 | |||
| 352 | /** | ||
| 353 | * Obtains the default <code>Sequencer</code>, connected to | ||
| 354 | * a default device. | ||
| 355 | * The returned <code>Sequencer</code> instance is | ||
| 356 | * connected to the default <code>Synthesizer</code>, | ||
| 357 | * as returned by {@link #getSynthesizer}. | ||
| 358 | * If there is no <code>Synthesizer</code> | ||
| 359 | * available, or the default <code>Synthesizer</code> | ||
| 360 | * cannot be opened, the <code>sequencer</code> is connected | ||
| 361 | * to the default <code>Receiver</code>, as returned | ||
| 362 | * by {@link #getReceiver}. | ||
| 363 | * The connection is made by retrieving a <code>Transmitter</code> | ||
| 364 | * instance from the <code>Sequencer</code> and setting its | ||
| 365 | * <code>Receiver</code>. | ||
| 366 | * Closing and re-opening the sequencer will restore the | ||
| 367 | * connection to the default device. | ||
| 368 | * | ||
| 369 | * <p>This method is equivalent to calling | ||
| 370 | * <code>getSequencer(true)</code>. | ||
| 371 | * | ||
| 372 | * <p>If the system property | ||
| 373 | * <code>javax.sound.midi.Sequencer</code> | ||
| 374 | * is defined or it is defined in the file "sound.properties", | ||
| 375 | * it is used to identify the default sequencer. | ||
| 376 | * For details, refer to the {@link MidiSystem class description}. | ||
| 377 | * | ||
| 378 | * @return the default sequencer, connected to a default Receiver | ||
| 379 | * @throws MidiUnavailableException if the sequencer is not | ||
| 380 | * available due to resource restrictions, | ||
| 381 | * or there is no <code>Receiver</code> available by any | ||
| 382 | * installed <code>MidiDevice</code>, | ||
| 383 | * or no sequencer is installed in the system. | ||
| 384 | * @see #getSequencer(boolean) | ||
| 385 | * @see #getSynthesizer | ||
| 386 | * @see #getReceiver | ||
| 387 | */ | ||
| 388 | public static Sequencer getSequencer() throws MidiUnavailableException { | ||
| 389 | return getSequencer(true); | ||
| 390 | } | ||
| 391 | |||
| 392 | |||
| 393 | |||
| 394 | /** | ||
| 395 | * Obtains the default <code>Sequencer</code>, optionally | ||
| 396 | * connected to a default device. | ||
| 397 | * | ||
| 398 | * <p>If <code>connected</code> is true, the returned | ||
| 399 | * <code>Sequencer</code> instance is | ||
| 400 | * connected to the default <code>Synthesizer</code>, | ||
| 401 | * as returned by {@link #getSynthesizer}. | ||
| 402 | * If there is no <code>Synthesizer</code> | ||
| 403 | * available, or the default <code>Synthesizer</code> | ||
| 404 | * cannot be opened, the <code>sequencer</code> is connected | ||
| 405 | * to the default <code>Receiver</code>, as returned | ||
| 406 | * by {@link #getReceiver}. | ||
| 407 | * The connection is made by retrieving a <code>Transmitter</code> | ||
| 408 | * instance from the <code>Sequencer</code> and setting its | ||
| 409 | * <code>Receiver</code>. | ||
| 410 | * Closing and re-opening the sequencer will restore the | ||
| 411 | * connection to the default device. | ||
| 412 | * | ||
| 413 | * <p>If <code>connected</code> is false, the returned | ||
| 414 | * <code>Sequencer</code> instance is not connected, it | ||
| 415 | * has no open <code>Transmitters</code>. In order to | ||
| 416 | * play the sequencer on a MIDI device, or a <code>Synthesizer</code>, | ||
| 417 | * it is necessary to get a <code>Transmitter</code> and set its | ||
| 418 | * <code>Receiver</code>. | ||
| 419 | * | ||
| 420 | * <p>If the system property | ||
| 421 | * <code>javax.sound.midi.Sequencer</code> | ||
| 422 | * is defined or it is defined in the file "sound.properties", | ||
| 423 | * it is used to identify the default sequencer. | ||
| 424 | * For details, refer to the {@link MidiSystem class description}. | ||
| 425 | * | ||
| 426 | * @return the default sequencer | ||
| 427 | * @throws MidiUnavailableException if the sequencer is not | ||
| 428 | * available due to resource restrictions, | ||
| 429 | * or no sequencer is installed in the system, | ||
| 430 | * or if <code>connected</code> is true, and there is | ||
| 431 | * no <code>Receiver</code> available by any installed | ||
| 432 | * <code>MidiDevice</code> | ||
| 433 | * @see #getSynthesizer | ||
| 434 | * @see #getReceiver | ||
| 435 | * @since 1.5 | ||
| 436 | */ | ||
| 437 | public static Sequencer getSequencer(boolean connected) | ||
| 438 | throws MidiUnavailableException { | ||
| 439 | Sequencer seq = (Sequencer) getDefaultDeviceWrapper(Sequencer.class); | ||
| 440 | |||
| 441 | if (connected) { | ||
| 442 | // IMPORTANT: this code needs to be synch'ed with | ||
| 443 | // all AutoConnectSequencer instances, | ||
| 444 | // (e.g. RealTimeSequencer) because the | ||
| 445 | // same algorithm for synth retrieval | ||
| 446 | // needs to be used! | ||
| 447 | |||
| 448 | Receiver rec = null; | ||
| 449 | MidiUnavailableException mue = null; | ||
| 450 | |||
| 451 | // first try to connect to the default synthesizer | ||
| 452 | try { | ||
| 453 | Synthesizer synth = getSynthesizer(); | ||
| 454 | if (synth instanceof ReferenceCountingDevice) { | ||
| 455 | rec = ((ReferenceCountingDevice) synth).getReceiverReferenceCounting(); | ||
| 456 | } else { | ||
| 457 | synth.open(); | ||
| 458 | try { | ||
| 459 | rec = synth.getReceiver(); | ||
| 460 | } finally { | ||
| 461 | // make sure that the synth is properly closed | ||
| 462 | if (rec == null) { | ||
| 463 | synth.close(); | ||
| 464 | } | ||
| 465 | } | ||
| 466 | } | ||
| 467 | } catch (MidiUnavailableException e) { | ||
| 468 | // something went wrong with synth | ||
| 469 | if (e instanceof MidiUnavailableException) { | ||
| 470 | mue = (MidiUnavailableException) e; | ||
| 471 | } | ||
| 472 | } | ||
| 473 | if (rec == null) { | ||
| 474 | // then try to connect to the default Receiver | ||
| 475 | try { | ||
| 476 | rec = MidiSystem.getReceiver(); | ||
| 477 | } catch (Exception e) { | ||
| 478 | // something went wrong. Nothing to do then! | ||
| 479 | if (e instanceof MidiUnavailableException) { | ||
| 480 | mue = (MidiUnavailableException) e; | ||
| 481 | } | ||
| 482 | } | ||
| 483 | } | ||
| 484 | if (rec != null) { | ||
| 485 | seq.getTransmitter().setReceiver(rec); | ||
| 486 | if (seq instanceof AutoConnectSequencer) { | ||
| 487 | ((AutoConnectSequencer) seq).setAutoConnect(rec); | ||
| 488 | } | ||
| 489 | } else { | ||
| 490 | if (mue != null) { | ||
| 491 | throw mue; | ||
| 492 | } | ||
| 493 | throw new MidiUnavailableException("no receiver available"); | ||
| 494 | } | ||
| 495 | } | ||
| 496 | return seq; | ||
| 497 | } | ||
| 498 | |||
| 499 | |||
| 500 | |||
| 501 | |||
| 502 | /** | ||
| 503 | * Constructs a MIDI sound bank by reading it from the specified stream. | ||
| 504 | * The stream must point to | ||
| 505 | * a valid MIDI soundbank file. In general, MIDI soundbank providers may | ||
| 506 | * need to read some data from the stream before determining whether they | ||
| 507 | * support it. These parsers must | ||
| 508 | * be able to mark the stream, read enough data to determine whether they | ||
| 509 | * support the stream, and, if not, reset the stream's read pointer to | ||
| 510 | * its original position. If the input stream does not support this, | ||
| 511 | * this method may fail with an IOException. | ||
| 512 | * @param stream the source of the sound bank data. | ||
| 513 | * @return the sound bank | ||
| 514 | * @throws InvalidMidiDataException if the stream does not point to | ||
| 515 | * valid MIDI soundbank data recognized by the system | ||
| 516 | * @throws IOException if an I/O error occurred when loading the soundbank | ||
| 517 | * @see InputStream#markSupported | ||
| 518 | * @see InputStream#mark | ||
| 519 | */ | ||
| 520 | public static Soundbank getSoundbank(InputStream stream) | ||
| 521 | throws InvalidMidiDataException, IOException { | ||
| 522 | |||
| 523 | SoundbankReader sp = null; | ||
| 524 | Soundbank s = null; | ||
| 525 | |||
| 526 | List providers = getSoundbankReaders(); | ||
| 527 | |||
| 528 | for(int i = 0; i < providers.size(); i++) { | ||
| 529 | sp = (SoundbankReader)providers.get(i); | ||
| 530 | s = sp.getSoundbank(stream); | ||
| 531 | |||
| 532 | if( s!= null) { | ||
| 533 | return s; | ||
| 534 | } | ||
| 535 | } | ||
| 536 | throw new InvalidMidiDataException("cannot get soundbank from stream"); | ||
| 537 | |||
| 538 | } | ||
| 539 | |||
| 540 | |||
| 541 | /** | ||
| 542 | * Constructs a <code>Soundbank</code> by reading it from the specified URL. | ||
| 543 | * The URL must point to a valid MIDI soundbank file. | ||
| 544 | * | ||
| 545 | * @param url the source of the sound bank data | ||
| 546 | * @return the sound bank | ||
| 547 | * @throws InvalidMidiDataException if the URL does not point to valid MIDI | ||
| 548 | * soundbank data recognized by the system | ||
| 549 | * @throws IOException if an I/O error occurred when loading the soundbank | ||
| 550 | */ | ||
| 551 | public static Soundbank getSoundbank(URL url) | ||
| 552 | throws InvalidMidiDataException, IOException { | ||
| 553 | |||
| 554 | SoundbankReader sp = null; | ||
| 555 | Soundbank s = null; | ||
| 556 | |||
| 557 | List providers = getSoundbankReaders(); | ||
| 558 | |||
| 559 | for(int i = 0; i < providers.size(); i++) { | ||
| 560 | sp = (SoundbankReader)providers.get(i); | ||
| 561 | s = sp.getSoundbank(url); | ||
| 562 | |||
| 563 | if( s!= null) { | ||
| 564 | return s; | ||
| 565 | } | ||
| 566 | } | ||
| 567 | throw new InvalidMidiDataException("cannot get soundbank from stream"); | ||
| 568 | |||
| 569 | } | ||
| 570 | |||
| 571 | |||
| 572 | /** | ||
| 573 | * Constructs a <code>Soundbank</code> by reading it from the specified | ||
| 574 | * <code>File</code>. | ||
| 575 | * The <code>File</code> must point to a valid MIDI soundbank file. | ||
| 576 | * | ||
| 577 | * @param file the source of the sound bank data | ||
| 578 | * @return the sound bank | ||
| 579 | * @throws InvalidMidiDataException if the <code>File</code> does not | ||
| 580 | * point to valid MIDI soundbank data recognized by the system | ||
| 581 | * @throws IOException if an I/O error occurred when loading the soundbank | ||
| 582 | */ | ||
| 583 | public static Soundbank getSoundbank(File file) | ||
| 584 | throws InvalidMidiDataException, IOException { | ||
| 585 | |||
| 586 | SoundbankReader sp = null; | ||
| 587 | Soundbank s = null; | ||
| 588 | |||
| 589 | List providers = getSoundbankReaders(); | ||
| 590 | |||
| 591 | for(int i = 0; i < providers.size(); i++) { | ||
| 592 | sp = (SoundbankReader)providers.get(i); | ||
| 593 | s = sp.getSoundbank(file); | ||
| 594 | |||
| 595 | if( s!= null) { | ||
| 596 | return s; | ||
| 597 | } | ||
| 598 | } | ||
| 599 | throw new InvalidMidiDataException("cannot get soundbank from stream"); | ||
| 600 | } | ||
| 601 | |||
| 602 | |||
| 603 | |||
| 604 | /** | ||
| 605 | * Obtains the MIDI file format of the data in the specified input stream. | ||
| 606 | * The stream must point to valid MIDI file data for a file type recognized | ||
| 607 | * by the system. | ||
| 608 | * <p> | ||
| 609 | * This method and/or the code it invokes may need to read some data from | ||
| 610 | * the stream to determine whether its data format is supported. The | ||
| 611 | * implementation may therefore | ||
| 612 | * need to mark the stream, read enough data to determine whether it is in | ||
| 613 | * a supported format, and reset the stream's read pointer to its original | ||
| 614 | * position. If the input stream does not permit this set of operations, | ||
| 615 | * this method may fail with an <code>IOException</code>. | ||
| 616 | * <p> | ||
| 617 | * This operation can only succeed for files of a type which can be parsed | ||
| 618 | * by an installed file reader. It may fail with an InvalidMidiDataException | ||
| 619 | * even for valid files if no compatible file reader is installed. It | ||
| 620 | * will also fail with an InvalidMidiDataException if a compatible file reader | ||
| 621 | * is installed, but encounters errors while determining the file format. | ||
| 622 | * | ||
| 623 | * @param stream the input stream from which file format information | ||
| 624 | * should be extracted | ||
| 625 | * @return an <code>MidiFileFormat</code> object describing the MIDI file | ||
| 626 | * format | ||
| 627 | * @throws InvalidMidiDataException if the stream does not point to valid | ||
| 628 | * MIDI file data recognized by the system | ||
| 629 | * @throws IOException if an I/O exception occurs while accessing the | ||
| 630 | * stream | ||
| 631 | * @see #getMidiFileFormat(URL) | ||
| 632 | * @see #getMidiFileFormat(File) | ||
| 633 | * @see InputStream#markSupported | ||
| 634 | * @see InputStream#mark | ||
| 635 | */ | ||
| 636 | public static MidiFileFormat getMidiFileFormat(InputStream stream) | ||
| 637 | throws InvalidMidiDataException, IOException { | ||
| 638 | |||
| 639 | List providers = getMidiFileReaders(); | ||
| 640 | MidiFileFormat format = null; | ||
| 641 | |||
| 642 | for(int i = 0; i < providers.size(); i++) { | ||
| 643 | MidiFileReader reader = (MidiFileReader) providers.get(i); | ||
| 644 | try { | ||
| 645 | format = reader.getMidiFileFormat( stream ); // throws IOException | ||
| 646 | break; | ||
| 647 | } catch (InvalidMidiDataException e) { | ||
| 648 | continue; | ||
| 649 | } | ||
| 650 | } | ||
| 651 | |||
| 652 | if( format==null ) { | ||
| 653 | throw new InvalidMidiDataException("input stream is not a supported file type"); | ||
| 654 | } else { | ||
| 655 | return format; | ||
| 656 | } | ||
| 657 | } | ||
| 658 | |||
| 659 | |||
| 660 | /** | ||
| 661 | * Obtains the MIDI file format of the data in the specified URL. The URL | ||
| 662 | * must point to valid MIDI file data for a file type recognized | ||
| 663 | * by the system. | ||
| 664 | * <p> | ||
| 665 | * This operation can only succeed for files of a type which can be parsed | ||
| 666 | * by an installed file reader. It may fail with an InvalidMidiDataException | ||
| 667 | * even for valid files if no compatible file reader is installed. It | ||
| 668 | * will also fail with an InvalidMidiDataException if a compatible file reader | ||
| 669 | * is installed, but encounters errors while determining the file format. | ||
| 670 | * | ||
| 671 | * @param url the URL from which file format information should be | ||
| 672 | * extracted | ||
| 673 | * @return a <code>MidiFileFormat</code> object describing the MIDI file | ||
| 674 | * format | ||
| 675 | * @throws InvalidMidiDataException if the URL does not point to valid MIDI | ||
| 676 | * file data recognized by the system | ||
| 677 | * @throws IOException if an I/O exception occurs while accessing the URL | ||
| 678 | * | ||
| 679 | * @see #getMidiFileFormat(InputStream) | ||
| 680 | * @see #getMidiFileFormat(File) | ||
| 681 | */ | ||
| 682 | public static MidiFileFormat getMidiFileFormat(URL url) | ||
| 683 | throws InvalidMidiDataException, IOException { | ||
| 684 | |||
| 685 | List providers = getMidiFileReaders(); | ||
| 686 | MidiFileFormat format = null; | ||
| 687 | |||
| 688 | for(int i = 0; i < providers.size(); i++) { | ||
| 689 | MidiFileReader reader = (MidiFileReader) providers.get(i); | ||
| 690 | try { | ||
| 691 | format = reader.getMidiFileFormat( url ); // throws IOException | ||
| 692 | break; | ||
| 693 | } catch (InvalidMidiDataException e) { | ||
| 694 | continue; | ||
| 695 | } | ||
| 696 | } | ||
| 697 | |||
| 698 | if( format==null ) { | ||
| 699 | throw new InvalidMidiDataException("url is not a supported file type"); | ||
| 700 | } else { | ||
| 701 | return format; | ||
| 702 | } | ||
| 703 | } | ||
| 704 | |||
| 705 | |||
| 706 | /** | ||
| 707 | * Obtains the MIDI file format of the specified <code>File</code>. The | ||
| 708 | * <code>File</code> must point to valid MIDI file data for a file type | ||
| 709 | * recognized by the system. | ||
| 710 | * <p> | ||
| 711 | * This operation can only succeed for files of a type which can be parsed | ||
| 712 | * by an installed file reader. It may fail with an InvalidMidiDataException | ||
| 713 | * even for valid files if no compatible file reader is installed. It | ||
| 714 | * will also fail with an InvalidMidiDataException if a compatible file reader | ||
| 715 | * is installed, but encounters errors while determining the file format. | ||
| 716 | * | ||
| 717 | * @param file the <code>File</code> from which file format information | ||
| 718 | * should be extracted | ||
| 719 | * @return a <code>MidiFileFormat</code> object describing the MIDI file | ||
| 720 | * format | ||
| 721 | * @throws InvalidMidiDataException if the <code>File</code> does not point | ||
| 722 | * to valid MIDI file data recognized by the system | ||
| 723 | * @throws IOException if an I/O exception occurs while accessing the file | ||
| 724 | * | ||
| 725 | * @see #getMidiFileFormat(InputStream) | ||
| 726 | * @see #getMidiFileFormat(URL) | ||
| 727 | */ | ||
| 728 | public static MidiFileFormat getMidiFileFormat(File file) | ||
| 729 | throws InvalidMidiDataException, IOException { | ||
| 730 | |||
| 731 | List providers = getMidiFileReaders(); | ||
| 732 | MidiFileFormat format = null; | ||
| 733 | |||
| 734 | for(int i = 0; i < providers.size(); i++) { | ||
| 735 | MidiFileReader reader = (MidiFileReader) providers.get(i); | ||
| 736 | try { | ||
| 737 | format = reader.getMidiFileFormat( file ); // throws IOException | ||
| 738 | break; | ||
| 739 | } catch (InvalidMidiDataException e) { | ||
| 740 | continue; | ||
| 741 | } | ||
| 742 | } | ||
| 743 | |||
| 744 | if( format==null ) { | ||
| 745 | throw new InvalidMidiDataException("file is not a supported file type"); | ||
| 746 | } else { | ||
| 747 | return format; | ||
| 748 | } | ||
| 749 | } | ||
| 750 | |||
| 751 | |||
| 752 | /** | ||
| 753 | * Obtains a MIDI sequence from the specified input stream. The stream must | ||
| 754 | * point to valid MIDI file data for a file type recognized | ||
| 755 | * by the system. | ||
| 756 | * <p> | ||
| 757 | * This method and/or the code it invokes may need to read some data | ||
| 758 | * from the stream to determine whether | ||
| 759 | * its data format is supported. The implementation may therefore | ||
| 760 | * need to mark the stream, read enough data to determine whether it is in | ||
| 761 | * a supported format, and reset the stream's read pointer to its original | ||
| 762 | * position. If the input stream does not permit this set of operations, | ||
| 763 | * this method may fail with an <code>IOException</code>. | ||
| 764 | * <p> | ||
| 765 | * This operation can only succeed for files of a type which can be parsed | ||
| 766 | * by an installed file reader. It may fail with an InvalidMidiDataException | ||
| 767 | * even for valid files if no compatible file reader is installed. It | ||
| 768 | * will also fail with an InvalidMidiDataException if a compatible file reader | ||
| 769 | * is installed, but encounters errors while constructing the <code>Sequence</code> | ||
| 770 | * object from the file data. | ||
| 771 | * | ||
| 772 | * @param stream the input stream from which the <code>Sequence</code> | ||
| 773 | * should be constructed | ||
| 774 | * @return a <code>Sequence</code> object based on the MIDI file data | ||
| 775 | * contained in the input stream | ||
| 776 | * @throws InvalidMidiDataException if the stream does not point to | ||
| 777 | * valid MIDI file data recognized by the system | ||
| 778 | * @throws IOException if an I/O exception occurs while accessing the | ||
| 779 | * stream | ||
| 780 | * @see InputStream#markSupported | ||
| 781 | * @see InputStream#mark | ||
| 782 | */ | ||
| 783 | public static Sequence getSequence(InputStream stream) | ||
| 784 | throws InvalidMidiDataException, IOException { | ||
| 785 | |||
| 786 | List providers = getMidiFileReaders(); | ||
| 787 | Sequence sequence = null; | ||
| 788 | |||
| 789 | for(int i = 0; i < providers.size(); i++) { | ||
| 790 | MidiFileReader reader = (MidiFileReader) providers.get(i); | ||
| 791 | try { | ||
| 792 | sequence = reader.getSequence( stream ); // throws IOException | ||
| 793 | break; | ||
| 794 | } catch (InvalidMidiDataException e) { | ||
| 795 | continue; | ||
| 796 | } | ||
| 797 | } | ||
| 798 | |||
| 799 | if( sequence==null ) { | ||
| 800 | throw new InvalidMidiDataException("could not get sequence from input stream"); | ||
| 801 | } else { | ||
| 802 | return sequence; | ||
| 803 | } | ||
| 804 | } | ||
| 805 | |||
| 806 | |||
| 807 | /** | ||
| 808 | * Obtains a MIDI sequence from the specified URL. The URL must | ||
| 809 | * point to valid MIDI file data for a file type recognized | ||
| 810 | * by the system. | ||
| 811 | * <p> | ||
| 812 | * This operation can only succeed for files of a type which can be parsed | ||
| 813 | * by an installed file reader. It may fail with an InvalidMidiDataException | ||
| 814 | * even for valid files if no compatible file reader is installed. It | ||
| 815 | * will also fail with an InvalidMidiDataException if a compatible file reader | ||
| 816 | * is installed, but encounters errors while constructing the <code>Sequence</code> | ||
| 817 | * object from the file data. | ||
| 818 | * | ||
| 819 | * @param url the URL from which the <code>Sequence</code> should be | ||
| 820 | * constructed | ||
| 821 | * @return a <code>Sequence</code> object based on the MIDI file data | ||
| 822 | * pointed to by the URL | ||
| 823 | * @throws InvalidMidiDataException if the URL does not point to valid MIDI | ||
| 824 | * file data recognized by the system | ||
| 825 | * @throws IOException if an I/O exception occurs while accessing the URL | ||
| 826 | */ | ||
| 827 | public static Sequence getSequence(URL url) | ||
| 828 | throws InvalidMidiDataException, IOException { | ||
| 829 | |||
| 830 | List providers = getMidiFileReaders(); | ||
| 831 | Sequence sequence = null; | ||
| 832 | |||
| 833 | for(int i = 0; i < providers.size(); i++) { | ||
| 834 | MidiFileReader reader = (MidiFileReader) providers.get(i); | ||
| 835 | try { | ||
| 836 | sequence = reader.getSequence( url ); // throws IOException | ||
| 837 | break; | ||
| 838 | } catch (InvalidMidiDataException e) { | ||
| 839 | continue; | ||
| 840 | } | ||
| 841 | } | ||
| 842 | |||
| 843 | if( sequence==null ) { | ||
| 844 | throw new InvalidMidiDataException("could not get sequence from URL"); | ||
| 845 | } else { | ||
| 846 | return sequence; | ||
| 847 | } | ||
| 848 | } | ||
| 849 | |||
| 850 | |||
| 851 | /** | ||
| 852 | * Obtains a MIDI sequence from the specified <code>File</code>. | ||
| 853 | * The <code>File</code> must point to valid MIDI file data | ||
| 854 | * for a file type recognized by the system. | ||
| 855 | * <p> | ||
| 856 | * This operation can only succeed for files of a type which can be parsed | ||
| 857 | * by an installed file reader. It may fail with an InvalidMidiDataException | ||
| 858 | * even for valid files if no compatible file reader is installed. It | ||
| 859 | * will also fail with an InvalidMidiDataException if a compatible file reader | ||
| 860 | * is installed, but encounters errors while constructing the <code>Sequence</code> | ||
| 861 | * object from the file data. | ||
| 862 | * | ||
| 863 | * @param file the <code>File</code> from which the <code>Sequence</code> | ||
| 864 | * should be constructed | ||
| 865 | * @return a <code>Sequence</code> object based on the MIDI file data | ||
| 866 | * pointed to by the File | ||
| 867 | * @throws InvalidMidiDataException if the File does not point to valid MIDI | ||
| 868 | * file data recognized by the system | ||
| 869 | * @throws IOException if an I/O exception occurs | ||
| 870 | */ | ||
| 871 | public static Sequence getSequence(File file) | ||
| 872 | throws InvalidMidiDataException, IOException { | ||
| 873 | |||
| 874 | List providers = getMidiFileReaders(); | ||
| 875 | Sequence sequence = null; | ||
| 876 | |||
| 877 | for(int i = 0; i < providers.size(); i++) { | ||
| 878 | MidiFileReader reader = (MidiFileReader) providers.get(i); | ||
| 879 | try { | ||
| 880 | sequence = reader.getSequence( file ); // throws IOException | ||
| 881 | break; | ||
| 882 | } catch (InvalidMidiDataException e) { | ||
| 883 | continue; | ||
| 884 | } | ||
| 885 | } | ||
| 886 | |||
| 887 | if( sequence==null ) { | ||
| 888 | throw new InvalidMidiDataException("could not get sequence from file"); | ||
| 889 | } else { | ||
| 890 | return sequence; | ||
| 891 | } | ||
| 892 | } | ||
| 893 | |||
| 894 | |||
| 895 | /** | ||
| 896 | * Obtains the set of MIDI file types for which file writing support is | ||
| 897 | * provided by the system. | ||
| 898 | * @return array of unique file types. If no file types are supported, | ||
| 899 | * an array of length 0 is returned. | ||
| 900 | */ | ||
| 901 | public static int[] getMidiFileTypes() { | ||
| 902 | |||
| 903 | List providers = getMidiFileWriters(); | ||
| 904 | Set allTypes = new HashSet(); | ||
| 905 | |||
| 906 | // gather from all the providers | ||
| 907 | |||
| 908 | for (int i = 0; i < providers.size(); i++ ) { | ||
| 909 | MidiFileWriter writer = (MidiFileWriter) providers.get(i); | ||
| 910 | int[] types = writer.getMidiFileTypes(); | ||
| 911 | for (int j = 0; j < types.length; j++ ) { | ||
| 912 | allTypes.add(new Integer(types[j])); | ||
| 913 | } | ||
| 914 | } | ||
| 915 | int resultTypes[] = new int[allTypes.size()]; | ||
| 916 | int index = 0; | ||
| 917 | Iterator iterator = allTypes.iterator(); | ||
| 918 | while (iterator.hasNext()) { | ||
| 919 | Integer integer = (Integer) iterator.next(); | ||
| 920 | resultTypes[index++] = integer.intValue(); | ||
| 921 | } | ||
| 922 | return resultTypes; | ||
| 923 | } | ||
| 924 | |||
| 925 | |||
| 926 | /** | ||
| 927 | * Indicates whether file writing support for the specified MIDI file type | ||
| 928 | * is provided by the system. | ||
| 929 | * @param fileType the file type for which write capabilities are queried | ||
| 930 | * @return <code>true</code> if the file type is supported, | ||
| 931 | * otherwise <code>false</code> | ||
| 932 | */ | ||
| 933 | public static boolean isFileTypeSupported(int fileType) { | ||
| 934 | |||
| 935 | List providers = getMidiFileWriters(); | ||
| 936 | |||
| 937 | for (int i = 0; i < providers.size(); i++ ) { | ||
| 938 | MidiFileWriter writer = (MidiFileWriter) providers.get(i); | ||
| 939 | if( writer.isFileTypeSupported(fileType)) { | ||
| 940 | return true; | ||
| 941 | } | ||
| 942 | } | ||
| 943 | return false; | ||
| 944 | } | ||
| 945 | |||
| 946 | |||
| 947 | /** | ||
| 948 | * Obtains the set of MIDI file types that the system can write from the | ||
| 949 | * sequence specified. | ||
| 950 | * @param sequence the sequence for which MIDI file type support | ||
| 951 | * is queried | ||
| 952 | * @return the set of unique supported file types. If no file types are supported, | ||
| 953 | * returns an array of length 0. | ||
| 954 | */ | ||
| 955 | public static int[] getMidiFileTypes(Sequence sequence) { | ||
| 956 | |||
| 957 | List providers = getMidiFileWriters(); | ||
| 958 | Set allTypes = new HashSet(); | ||
| 959 | |||
| 960 | // gather from all the providers | ||
| 961 | |||
| 962 | for (int i = 0; i < providers.size(); i++ ) { | ||
| 963 | MidiFileWriter writer = (MidiFileWriter) providers.get(i); | ||
| 964 | int[] types = writer.getMidiFileTypes(sequence); | ||
| 965 | for (int j = 0; j < types.length; j++ ) { | ||
| 966 | allTypes.add(new Integer(types[j])); | ||
| 967 | } | ||
| 968 | } | ||
| 969 | int resultTypes[] = new int[allTypes.size()]; | ||
| 970 | int index = 0; | ||
| 971 | Iterator iterator = allTypes.iterator(); | ||
| 972 | while (iterator.hasNext()) { | ||
| 973 | Integer integer = (Integer) iterator.next(); | ||
| 974 | resultTypes[index++] = integer.intValue(); | ||
| 975 | } | ||
| 976 | return resultTypes; | ||
| 977 | } | ||
| 978 | |||
| 979 | |||
| 980 | /** | ||
| 981 | * Indicates whether a MIDI file of the file type specified can be written | ||
| 982 | * from the sequence indicated. | ||
| 983 | * @param fileType the file type for which write capabilities | ||
| 984 | * are queried | ||
| 985 | * @param sequence the sequence for which file writing support is queried | ||
| 986 | * @return <code>true</code> if the file type is supported for this | ||
| 987 | * sequence, otherwise <code>false</code> | ||
| 988 | */ | ||
| 989 | public static boolean isFileTypeSupported(int fileType, Sequence sequence) { | ||
| 990 | |||
| 991 | List providers = getMidiFileWriters(); | ||
| 992 | |||
| 993 | for (int i = 0; i < providers.size(); i++ ) { | ||
| 994 | MidiFileWriter writer = (MidiFileWriter) providers.get(i); | ||
| 995 | if( writer.isFileTypeSupported(fileType,sequence)) { | ||
| 996 | return true; | ||
| 997 | } | ||
| 998 | } | ||
| 999 | return false; | ||
| 1000 | } | ||
| 1001 | |||
| 1002 | |||
| 1003 | /** | ||
| 1004 | * Writes a stream of bytes representing a file of the MIDI file type | ||
| 1005 | * indicated to the output stream provided. | ||
| 1006 | * @param in sequence containing MIDI data to be written to the file | ||
| 1007 | * @param fileType the file type of the file to be written to the output stream | ||
| 1008 | * @param out stream to which the file data should be written | ||
| 1009 | * @return the number of bytes written to the output stream | ||
| 1010 | * @throws IOException if an I/O exception occurs | ||
| 1011 | * @throws IllegalArgumentException if the file format is not supported by | ||
| 1012 | * the system | ||
| 1013 | * @see #isFileTypeSupported(int, Sequence) | ||
| 1014 | * @see #getMidiFileTypes(Sequence) | ||
| 1015 | */ | ||
| 1016 | public static int write(Sequence in, int fileType, OutputStream out) throws IOException { | ||
| 1017 | |||
| 1018 | List providers = getMidiFileWriters(); | ||
| 1019 | //$$fb 2002-04-17: Fix for 4635287: Standard MidiFileWriter cannot write empty Sequences | ||
| 1020 | int bytesWritten = -2; | ||
| 1021 | |||
| 1022 | for (int i = 0; i < providers.size(); i++ ) { | ||
| 1023 | MidiFileWriter writer = (MidiFileWriter) providers.get(i); | ||
| 1024 | if( writer.isFileTypeSupported( fileType, in ) ) { | ||
| 1025 | |||
| 1026 | bytesWritten = writer.write(in, fileType, out); | ||
| 1027 | break; | ||
| 1028 | } | ||
| 1029 | } | ||
| 1030 | if (bytesWritten == -2) { | ||
| 1031 | throw new IllegalArgumentException("MIDI file type is not supported"); | ||
| 1032 | } | ||
| 1033 | return bytesWritten; | ||
| 1034 | } | ||
| 1035 | |||
| 1036 | |||
| 1037 | /** | ||
| 1038 | * Writes a stream of bytes representing a file of the MIDI file type | ||
| 1039 | * indicated to the external file provided. | ||
| 1040 | * @param in sequence containing MIDI data to be written to the file | ||
| 1041 | * @param type the file type of the file to be written to the output stream | ||
| 1042 | * @param out external file to which the file data should be written | ||
| 1043 | * @return the number of bytes written to the file | ||
| 1044 | * @throws IOException if an I/O exception occurs | ||
| 1045 | * @throws IllegalArgumentException if the file type is not supported by | ||
| 1046 | * the system | ||
| 1047 | * @see #isFileTypeSupported(int, Sequence) | ||
| 1048 | * @see #getMidiFileTypes(Sequence) | ||
| 1049 | */ | ||
| 1050 | public static int write(Sequence in, int type, File out) throws IOException { | ||
| 1051 | |||
| 1052 | List providers = getMidiFileWriters(); | ||
| 1053 | //$$fb 2002-04-17: Fix for 4635287: Standard MidiFileWriter cannot write empty Sequences | ||
| 1054 | int bytesWritten = -2; | ||
| 1055 | |||
| 1056 | for (int i = 0; i < providers.size(); i++ ) { | ||
| 1057 | MidiFileWriter writer = (MidiFileWriter) providers.get(i); | ||
| 1058 | if( writer.isFileTypeSupported( type, in ) ) { | ||
| 1059 | |||
| 1060 | bytesWritten = writer.write(in, type, out); | ||
| 1061 | break; | ||
| 1062 | } | ||
| 1063 | } | ||
| 1064 | if (bytesWritten == -2) { | ||
| 1065 | throw new IllegalArgumentException("MIDI file type is not supported"); | ||
| 1066 | } | ||
| 1067 | return bytesWritten; | ||
| 1068 | } | ||
| 1069 | |||
| 1070 | |||
| 1071 | |||
| 1072 | // HELPER METHODS | ||
| 1073 | |||
| 1074 | private static List getMidiDeviceProviders() { | ||
| 1075 | return getProviders(MidiDeviceProvider.class); | ||
| 1076 | } | ||
| 1077 | |||
| 1078 | |||
| 1079 | private static List getSoundbankReaders() { | ||
| 1080 | return getProviders(SoundbankReader.class); | ||
| 1081 | } | ||
| 1082 | |||
| 1083 | |||
| 1084 | private static List getMidiFileWriters() { | ||
| 1085 | return getProviders(MidiFileWriter.class); | ||
| 1086 | } | ||
| 1087 | |||
| 1088 | |||
| 1089 | private static List getMidiFileReaders() { | ||
| 1090 | return getProviders(MidiFileReader.class); | ||
| 1091 | } | ||
| 1092 | |||
| 1093 | |||
| 1094 | /** Attempts to locate and return a default MidiDevice of the specified | ||
| 1095 | * type. | ||
| 1096 | * | ||
| 1097 | * This method wraps {@link #getDefaultDevice}. It catches the | ||
| 1098 | * <code>IllegalArgumentException</code> thrown by | ||
| 1099 | * <code>getDefaultDevice</code> and instead throws a | ||
| 1100 | * <code>MidiUnavailableException</code>, with the catched | ||
| 1101 | * exception chained. | ||
| 1102 | * | ||
| 1103 | * @param deviceClass The requested device type, one of Synthesizer.class, | ||
| 1104 | * Sequencer.class, Receiver.class or Transmitter.class. | ||
| 1105 | * @throws MidiUnavalableException on failure. | ||
| 1106 | */ | ||
| 1107 | private static MidiDevice getDefaultDeviceWrapper(Class deviceClass) | ||
| 1108 | throws MidiUnavailableException{ | ||
| 1109 | try { | ||
| 1110 | return getDefaultDevice(deviceClass); | ||
| 1111 | } catch (IllegalArgumentException iae) { | ||
| 1112 | MidiUnavailableException mae = new MidiUnavailableException(); | ||
| 1113 | mae.initCause(iae); | ||
| 1114 | throw mae; | ||
| 1115 | } | ||
| 1116 | } | ||
| 1117 | |||
| 1118 | |||
| 1119 | /** Attempts to locate and return a default MidiDevice of the specified | ||
| 1120 | * type. | ||
| 1121 | * | ||
| 1122 | * @param deviceClass The requested device type, one of Synthesizer.class, | ||
| 1123 | * Sequencer.class, Receiver.class or Transmitter.class. | ||
| 1124 | * @throws IllegalArgumentException on failure. | ||
| 1125 | */ | ||
| 1126 | private static MidiDevice getDefaultDevice(Class deviceClass) { | ||
| 1127 | List providers = getMidiDeviceProviders(); | ||
| 1128 | String providerClassName = JDK13Services.getDefaultProviderClassName(deviceClass); | ||
| 1129 | String instanceName = JDK13Services.getDefaultInstanceName(deviceClass); | ||
| 1130 | MidiDevice device; | ||
| 1131 | |||
| 1132 | if (providerClassName != null) { | ||
| 1133 | MidiDeviceProvider defaultProvider = getNamedProvider(providerClassName, providers); | ||
| 1134 | if (defaultProvider != null) { | ||
| 1135 | if (instanceName != null) { | ||
| 1136 | device = getNamedDevice(instanceName, defaultProvider, deviceClass); | ||
| 1137 | if (device != null) { | ||
| 1138 | return device; | ||
| 1139 | } | ||
| 1140 | } | ||
| 1141 | device = getFirstDevice(defaultProvider, deviceClass); | ||
| 1142 | if (device != null) { | ||
| 1143 | return device; | ||
| 1144 | } | ||
| 1145 | } | ||
| 1146 | } | ||
| 1147 | |||
| 1148 | /* Provider class not specified or cannot be found, or | ||
| 1149 | provider class specified, and no appropriate device available or | ||
| 1150 | provider class and instance specified and instance cannot be found or is not appropriate */ | ||
| 1151 | if (instanceName != null) { | ||
| 1152 | device = getNamedDevice(instanceName, providers, deviceClass); | ||
| 1153 | if (device != null) { | ||
| 1154 | return device; | ||
| 1155 | } | ||
| 1156 | } | ||
| 1157 | |||
| 1158 | /* No default are specified, or if something is specified, everything | ||
| 1159 | failed. */ | ||
| 1160 | device = getFirstDevice(providers, deviceClass); | ||
| 1161 | if (device != null) { | ||
| 1162 | return device; | ||
| 1163 | } | ||
| 1164 | throw new IllegalArgumentException("Requested device not installed"); | ||
| 1165 | } | ||
| 1166 | |||
| 1167 | |||
| 1168 | |||
| 1169 | /** Return a MidiDeviceProcider of a given class from the list of | ||
| 1170 | MidiDeviceProviders. | ||
| 1171 | |||
| 1172 | @param providerClassName The class name of the provider to be returned. | ||
| 1173 | @param provider The list of MidiDeviceProviders that is searched. | ||
| 1174 | @return A MidiDeviceProvider of the requested class, or null if none | ||
| 1175 | is found. | ||
| 1176 | */ | ||
| 1177 | private static MidiDeviceProvider getNamedProvider(String providerClassName, List providers) { | ||
| 1178 | for(int i = 0; i < providers.size(); i++) { | ||
| 1179 | MidiDeviceProvider provider = (MidiDeviceProvider) providers.get(i); | ||
| 1180 | if (provider.getClass().getName().equals(providerClassName)) { | ||
| 1181 | return provider; | ||
| 1182 | } | ||
| 1183 | } | ||
| 1184 | return null; | ||
| 1185 | } | ||
| 1186 | |||
| 1187 | |||
| 1188 | /** Return a MidiDevice with a given name from a given MidiDeviceProvider. | ||
| 1189 | @param deviceName The name of the MidiDevice to be returned. | ||
| 1190 | @param provider The MidiDeviceProvider to check for MidiDevices. | ||
| 1191 | @param deviceClass The requested device type, one of Synthesizer.class, | ||
| 1192 | Sequencer.class, Receiver.class or Transmitter.class. | ||
| 1193 | |||
| 1194 | @return A MidiDevice matching the requirements, or null if none is found. | ||
| 1195 | */ | ||
| 1196 | private static MidiDevice getNamedDevice(String deviceName, | ||
| 1197 | MidiDeviceProvider provider, | ||
| 1198 | Class deviceClass) { | ||
| 1199 | MidiDevice device; | ||
| 1200 | // try to get MIDI port | ||
| 1201 | device = getNamedDevice(deviceName, provider, deviceClass, | ||
| 1202 | false, false); | ||
| 1203 | if (device != null) { | ||
| 1204 | return device; | ||
| 1205 | } | ||
| 1206 | |||
| 1207 | if (deviceClass == Receiver.class) { | ||
| 1208 | // try to get Synthesizer | ||
| 1209 | device = getNamedDevice(deviceName, provider, deviceClass, | ||
| 1210 | true, false); | ||
| 1211 | if (device != null) { | ||
| 1212 | return device; | ||
| 1213 | } | ||
| 1214 | } | ||
| 1215 | |||
| 1216 | return null; | ||
| 1217 | } | ||
| 1218 | |||
| 1219 | |||
| 1220 | /** Return a MidiDevice with a given name from a given MidiDeviceProvider. | ||
| 1221 | @param deviceName The name of the MidiDevice to be returned. | ||
| 1222 | @param provider The MidiDeviceProvider to check for MidiDevices. | ||
| 1223 | @param deviceClass The requested device type, one of Synthesizer.class, | ||
| 1224 | Sequencer.class, Receiver.class or Transmitter.class. | ||
| 1225 | |||
| 1226 | @return A MidiDevice matching the requirements, or null if none is found. | ||
| 1227 | */ | ||
| 1228 | private static MidiDevice getNamedDevice(String deviceName, | ||
| 1229 | MidiDeviceProvider provider, | ||
| 1230 | Class deviceClass, | ||
| 1231 | boolean allowSynthesizer, | ||
| 1232 | boolean allowSequencer) { | ||
| 1233 | MidiDevice.Info[] infos = provider.getDeviceInfo(); | ||
| 1234 | for (int i = 0; i < infos.length; i++) { | ||
| 1235 | if (infos[i].getName().equals(deviceName)) { | ||
| 1236 | MidiDevice device = provider.getDevice(infos[i]); | ||
| 1237 | if (isAppropriateDevice(device, deviceClass, | ||
| 1238 | allowSynthesizer, allowSequencer)) { | ||
| 1239 | return device; | ||
| 1240 | } | ||
| 1241 | } | ||
| 1242 | } | ||
| 1243 | return null; | ||
| 1244 | } | ||
| 1245 | |||
| 1246 | |||
| 1247 | /** Return a MidiDevice with a given name from a list of | ||
| 1248 | MidiDeviceProviders. | ||
| 1249 | @param deviceName The name of the MidiDevice to be returned. | ||
| 1250 | @param providers The List of MidiDeviceProviders to check for | ||
| 1251 | MidiDevices. | ||
| 1252 | @param deviceClass The requested device type, one of Synthesizer.class, | ||
| 1253 | Sequencer.class, Receiver.class or Transmitter.class. | ||
| 1254 | @return A Mixer matching the requirements, or null if none is found. | ||
| 1255 | */ | ||
| 1256 | private static MidiDevice getNamedDevice(String deviceName, | ||
| 1257 | List providers, | ||
| 1258 | Class deviceClass) { | ||
| 1259 | MidiDevice device; | ||
| 1260 | // try to get MIDI port | ||
| 1261 | device = getNamedDevice(deviceName, providers, deviceClass, | ||
| 1262 | false, false); | ||
| 1263 | if (device != null) { | ||
| 1264 | return device; | ||
| 1265 | } | ||
| 1266 | |||
| 1267 | if (deviceClass == Receiver.class) { | ||
| 1268 | // try to get Synthesizer | ||
| 1269 | device = getNamedDevice(deviceName, providers, deviceClass, | ||
| 1270 | true, false); | ||
| 1271 | if (device != null) { | ||
| 1272 | return device; | ||
| 1273 | } | ||
| 1274 | } | ||
| 1275 | |||
| 1276 | return null; | ||
| 1277 | } | ||
| 1278 | |||
| 1279 | |||
| 1280 | /** Return a MidiDevice with a given name from a list of | ||
| 1281 | MidiDeviceProviders. | ||
| 1282 | @param deviceName The name of the MidiDevice to be returned. | ||
| 1283 | @param providers The List of MidiDeviceProviders to check for | ||
| 1284 | MidiDevices. | ||
| 1285 | @param deviceClass The requested device type, one of Synthesizer.class, | ||
| 1286 | Sequencer.class, Receiver.class or Transmitter.class. | ||
| 1287 | @return A Mixer matching the requirements, or null if none is found. | ||
| 1288 | */ | ||
| 1289 | private static MidiDevice getNamedDevice(String deviceName, | ||
| 1290 | List providers, | ||
| 1291 | Class deviceClass, | ||
| 1292 | boolean allowSynthesizer, | ||
| 1293 | boolean allowSequencer) { | ||
| 1294 | for(int i = 0; i < providers.size(); i++) { | ||
| 1295 | MidiDeviceProvider provider = (MidiDeviceProvider) providers.get(i); | ||
| 1296 | MidiDevice device = getNamedDevice(deviceName, provider, | ||
| 1297 | deviceClass, | ||
| 1298 | allowSynthesizer, | ||
| 1299 | allowSequencer); | ||
| 1300 | if (device != null) { | ||
| 1301 | return device; | ||
| 1302 | } | ||
| 1303 | } | ||
| 1304 | return null; | ||
| 1305 | } | ||
| 1306 | |||
| 1307 | |||
| 1308 | /** From a given MidiDeviceProvider, return the first appropriate device. | ||
| 1309 | @param provider The MidiDeviceProvider to check for MidiDevices. | ||
| 1310 | @param deviceClass The requested device type, one of Synthesizer.class, | ||
| 1311 | Sequencer.class, Receiver.class or Transmitter.class. | ||
| 1312 | @return A MidiDevice is considered appropriate, or null if no | ||
| 1313 | appropriate device is found. | ||
| 1314 | */ | ||
| 1315 | private static MidiDevice getFirstDevice(MidiDeviceProvider provider, | ||
| 1316 | Class deviceClass) { | ||
| 1317 | MidiDevice device; | ||
| 1318 | // try to get MIDI port | ||
| 1319 | device = getFirstDevice(provider, deviceClass, | ||
| 1320 | false, false); | ||
| 1321 | if (device != null) { | ||
| 1322 | return device; | ||
| 1323 | } | ||
| 1324 | |||
| 1325 | if (deviceClass == Receiver.class) { | ||
| 1326 | // try to get Synthesizer | ||
| 1327 | device = getFirstDevice(provider, deviceClass, | ||
| 1328 | true, false); | ||
| 1329 | if (device != null) { | ||
| 1330 | return device; | ||
| 1331 | } | ||
| 1332 | } | ||
| 1333 | |||
| 1334 | return null; | ||
| 1335 | } | ||
| 1336 | |||
| 1337 | |||
| 1338 | /** From a given MidiDeviceProvider, return the first appropriate device. | ||
| 1339 | @param provider The MidiDeviceProvider to check for MidiDevices. | ||
| 1340 | @param deviceClass The requested device type, one of Synthesizer.class, | ||
| 1341 | Sequencer.class, Receiver.class or Transmitter.class. | ||
| 1342 | @return A MidiDevice is considered appropriate, or null if no | ||
| 1343 | appropriate device is found. | ||
| 1344 | */ | ||
| 1345 | private static MidiDevice getFirstDevice(MidiDeviceProvider provider, | ||
| 1346 | Class deviceClass, | ||
| 1347 | boolean allowSynthesizer, | ||
| 1348 | boolean allowSequencer) { | ||
| 1349 | MidiDevice.Info[] infos = provider.getDeviceInfo(); | ||
| 1350 | for (int j = 0; j < infos.length; j++) { | ||
| 1351 | MidiDevice device = provider.getDevice(infos[j]); | ||
| 1352 | if (isAppropriateDevice(device, deviceClass, | ||
| 1353 | allowSynthesizer, allowSequencer)) { | ||
| 1354 | return device; | ||
| 1355 | } | ||
| 1356 | } | ||
| 1357 | return null; | ||
| 1358 | } | ||
| 1359 | |||
| 1360 | |||
| 1361 | /** From a List of MidiDeviceProviders, return the first appropriate | ||
| 1362 | MidiDevice. | ||
| 1363 | @param providers The List of MidiDeviceProviders to search. | ||
| 1364 | @param deviceClass The requested device type, one of Synthesizer.class, | ||
| 1365 | Sequencer.class, Receiver.class or Transmitter.class. | ||
| 1366 | @return A MidiDevice that is considered appropriate, or null | ||
| 1367 | if none is found. | ||
| 1368 | */ | ||
| 1369 | private static MidiDevice getFirstDevice(List providers, | ||
| 1370 | Class deviceClass) { | ||
| 1371 | MidiDevice device; | ||
| 1372 | // try to get MIDI port | ||
| 1373 | device = getFirstDevice(providers, deviceClass, | ||
| 1374 | false, false); | ||
| 1375 | if (device != null) { | ||
| 1376 | return device; | ||
| 1377 | } | ||
| 1378 | |||
| 1379 | if (deviceClass == Receiver.class) { | ||
| 1380 | // try to get Synthesizer | ||
| 1381 | device = getFirstDevice(providers, deviceClass, | ||
| 1382 | true, false); | ||
| 1383 | if (device != null) { | ||
| 1384 | return device; | ||
| 1385 | } | ||
| 1386 | } | ||
| 1387 | |||
| 1388 | return null; | ||
| 1389 | } | ||
| 1390 | |||
| 1391 | |||
| 1392 | /** From a List of MidiDeviceProviders, return the first appropriate | ||
| 1393 | MidiDevice. | ||
| 1394 | @param providers The List of MidiDeviceProviders to search. | ||
| 1395 | @param deviceClass The requested device type, one of Synthesizer.class, | ||
| 1396 | Sequencer.class, Receiver.class or Transmitter.class. | ||
| 1397 | @return A MidiDevice that is considered appropriate, or null | ||
| 1398 | if none is found. | ||
| 1399 | */ | ||
| 1400 | private static MidiDevice getFirstDevice(List providers, | ||
| 1401 | Class deviceClass, | ||
| 1402 | boolean allowSynthesizer, | ||
| 1403 | boolean allowSequencer) { | ||
| 1404 | for(int i = 0; i < providers.size(); i++) { | ||
| 1405 | MidiDeviceProvider provider = (MidiDeviceProvider) providers.get(i); | ||
| 1406 | MidiDevice device = getFirstDevice(provider, deviceClass, | ||
| 1407 | allowSynthesizer, | ||
| 1408 | allowSequencer); | ||
| 1409 | if (device != null) { | ||
| 1410 | return device; | ||
| 1411 | } | ||
| 1412 | } | ||
| 1413 | return null; | ||
| 1414 | } | ||
| 1415 | |||
| 1416 | |||
| 1417 | /** Checks if a MidiDevice is appropriate. | ||
| 1418 | If deviceClass is Synthesizer or Sequencer, a device implementing | ||
| 1419 | the respective interface is considered appropriate. If deviceClass | ||
| 1420 | is Receiver or Transmitter, a device is considered appropriate if | ||
| 1421 | it implements neither Synthesizer nor Transmitter, and if it can | ||
| 1422 | provide at least one Receiver or Transmitter, respectively. | ||
| 1423 | |||
| 1424 | @param device the MidiDevice to test | ||
| 1425 | @param allowSynthesizer if true, Synthesizers are considered | ||
| 1426 | appropriate. Otherwise only pure MidiDevices are considered | ||
| 1427 | appropriate (unless allowSequencer is true). This flag only has an | ||
| 1428 | effect for deviceClass Receiver and Transmitter. For other device | ||
| 1429 | classes (Sequencer and Synthesizer), this flag has no effect. | ||
| 1430 | @param allowSequencer if true, Sequencers are considered | ||
| 1431 | appropriate. Otherwise only pure MidiDevices are considered | ||
| 1432 | appropriate (unless allowSynthesizer is true). This flag only has an | ||
| 1433 | effect for deviceClass Receiver and Transmitter. For other device | ||
| 1434 | classes (Sequencer and Synthesizer), this flag has no effect. | ||
| 1435 | @return true if the device is considered appropriate according to the | ||
| 1436 | rules given above, false otherwise. | ||
| 1437 | */ | ||
| 1438 | private static boolean isAppropriateDevice(MidiDevice device, | ||
| 1439 | Class deviceClass, | ||
| 1440 | boolean allowSynthesizer, | ||
| 1441 | boolean allowSequencer) { | ||
| 1442 | if (deviceClass.isInstance(device)) { | ||
| 1443 | // This clause is for deviceClass being either Synthesizer | ||
| 1444 | // or Sequencer. | ||
| 1445 | return true; | ||
| 1446 | } else { | ||
| 1447 | // Now the case that deviceClass is Transmitter or | ||
| 1448 | // Receiver. If neither allowSynthesizer nor allowSequencer is | ||
| 1449 | // true, we require device instances to be | ||
| 1450 | // neither Synthesizer nor Sequencer, since we only want | ||
| 1451 | // devices representing MIDI ports. | ||
| 1452 | // Otherwise, the respective type is accepted, too | ||
| 1453 | if ( (! (device instanceof Sequencer) && | ||
| 1454 | ! (device instanceof Synthesizer) ) || | ||
| 1455 | ((device instanceof Sequencer) && allowSequencer) || | ||
| 1456 | ((device instanceof Synthesizer) && allowSynthesizer)) { | ||
| 1457 | // And of cource, the device has to be able to provide | ||
| 1458 | // Receivers or Transmitters. | ||
| 1459 | if ((deviceClass == Receiver.class && | ||
| 1460 | device.getMaxReceivers() != 0) || | ||
| 1461 | (deviceClass == Transmitter.class && | ||
| 1462 | device.getMaxTransmitters() != 0)) { | ||
| 1463 | return true; | ||
| 1464 | } | ||
| 1465 | } | ||
| 1466 | } | ||
| 1467 | return false; | ||
| 1468 | } | ||
| 1469 | |||
| 1470 | |||
| 1471 | /** | ||
| 1472 | * Obtains the set of services currently installed on the system | ||
| 1473 | * using sun.misc.Service, the SPI mechanism in 1.3. | ||
| 1474 | * @return a List of instances of providers for the requested service. | ||
| 1475 | * If no providers are available, a List of length 0 will be returned. | ||
| 1476 | */ | ||
| 1477 | private static List getProviders(Class providerClass) { | ||
| 1478 | return JDK13Services.getProviders(providerClass); | ||
| 1479 | } | ||
| 1480 | } | ||