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Source Code of ImplicitOpenClose

/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
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* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
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/* @test
   @summary Test SoftSynthesizer implicit open/close using getReceiver. */

import java.lang.reflect.Field;

import javax.sound.midi.MidiDevice;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.MidiUnavailableException;
import javax.sound.midi.Patch;
import javax.sound.midi.Receiver;
import javax.sound.midi.Synthesizer;
import javax.sound.sampled.*;
import javax.sound.midi.MidiDevice.Info;

import com.sun.media.sound.*;

public class ImplicitOpenClose {
     
  public static void main(String[] args) throws Exception {
        Field f = SoftSynthesizer.class.getDeclaredField("testline");
        f.setAccessible(true);
        f.set(null, new DummySourceDataLine());
       
    Synthesizer synth = new SoftSynthesizer();
       
    ReferenceCountingDevice rcd = (ReferenceCountingDevice)synth;   
         
    // Test single open/close cycle
   
    Receiver recv = rcd.getReceiverReferenceCounting();
    if(!synth.isOpen())
      throw new Exception("Synthesizer not open!");
    recv.close();
    if(synth.isOpen())
      throw new Exception("Synthesizer not closed!");

    // Test using 2 receiver cycle
   
    Receiver recv1 = rcd.getReceiverReferenceCounting();
    if(!synth.isOpen())
      throw new Exception("Synthesizer not open!");   
    Receiver recv2 = rcd.getReceiverReferenceCounting();
    if(!synth.isOpen())
      throw new Exception("Synthesizer not open!");

    recv2.close();
    if(!synth.isOpen())
      throw new Exception("Synthesizer was closed!");
    recv1.close();
    if(synth.isOpen())
      throw new Exception("Synthesizer not closed!");
   
    // Test for explicit,implicit conflict
   
    synth.open();
    Receiver recv3 = rcd.getReceiverReferenceCounting();
    if(!synth.isOpen())
      throw new Exception("Synthesizer not open!");
    recv3.close();
    if(!synth.isOpen())
      throw new Exception("Synthesizer was closed!");
    synth.close();
    if(synth.isOpen())
      throw new Exception("Synthesizer not closed!");

    // Test for implicit,explicit conflict
   
    recv3 = rcd.getReceiverReferenceCounting();
    synth.open();
    if(!synth.isOpen())
      throw new Exception("Synthesizer not open!");
    recv3.close();
    if(!synth.isOpen())
      throw new Exception("Synthesizer was closed!");
    synth.close();
    if(synth.isOpen())
      throw new Exception("Synthesizer not closed!");
   
  }
}
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