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    1   /*
    2    * Copyright (c) 2010, 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   package com.sun.media.sound;
   26   
   27   import javax.sound.midi;
   28   
   29   
   30   /**
   31    * Helper class which allows to convert {@code Transmitter}
   32    * to {@code MidiDeviceTransmitter}.
   33    *
   34    * @author Alex Menkov
   35    */
   36   public class MidiDeviceTransmitterEnvelope implements MidiDeviceTransmitter {
   37   
   38       private final MidiDevice device;
   39       private final Transmitter transmitter;
   40   
   41       /**
   42        * Creates a new {@code MidiDeviceTransmitterEnvelope} object which
   43        * envelops the specified {@code Transmitter}
   44        * and is owned by the specified {@code MidiDevice}.
   45        *
   46        * @param device the owner {@code MidiDevice}
   47        * @param transmitter the {@code Transmitter} to be enveloped
   48        */
   49       public MidiDeviceTransmitterEnvelope(MidiDevice device, Transmitter transmitter) {
   50           if (device == null || transmitter == null) {
   51               throw new NullPointerException();
   52           }
   53           this.device = device;
   54           this.transmitter = transmitter;
   55       }
   56   
   57       // Transmitter implementation
   58       public void setReceiver(Receiver receiver) {
   59           transmitter.setReceiver(receiver);
   60       }
   61   
   62       public Receiver getReceiver() {
   63           return transmitter.getReceiver();
   64       }
   65   
   66       public void close() {
   67           transmitter.close();
   68       }
   69   
   70   
   71       // MidiDeviceReceiver implementation
   72       public MidiDevice getMidiDevice() {
   73           return device;
   74       }
   75   
   76       /**
   77        * Obtains the transmitter enveloped
   78        * by this {@code MidiDeviceTransmitterEnvelope} object.
   79        *
   80        * @return the enveloped transmitter
   81        */
   82       public Transmitter getTransmitter() {
   83           return transmitter;
   84       }
   85   }

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