src/share/classes/com/sun/media/sound/MidiOutDeviceProvider.java

Print this page




  87 
  88     MidiDevice[] getDeviceCache() { return devices; }
  89     void setDeviceCache(MidiDevice[] devices) { MidiOutDeviceProvider.devices = devices; }
  90     Info[] getInfoCache() { return infos; }
  91     void setInfoCache(Info[] infos) { MidiOutDeviceProvider.infos = infos; }
  92 
  93 
  94     // INNER CLASSES
  95 
  96     /**
  97      * Info class for MidiOutDevices.  Adds the
  98      * provider's Class to keep the provider class from being
  99      * unloaded.  Otherwise, at least on JDK1.1.7 and 1.1.8,
 100      * the provider class can be unloaded.  Then, then the provider
 101      * is next invoked, the static block is executed again and a new
 102      * instance of the device object is created.  Even though the
 103      * previous instance may still exist and be open / in use / etc.,
 104      * the new instance will not reflect that state...
 105      */
 106     static final class MidiOutDeviceInfo extends AbstractMidiDeviceProvider.Info {
 107         private final Class providerClass;
 108 
 109         private MidiOutDeviceInfo(int index, Class providerClass) {
 110             super(nGetName(index), nGetVendor(index), nGetDescription(index), nGetVersion(index), index);
 111             this.providerClass = providerClass;
 112         }
 113 
 114     } // class MidiOutDeviceInfo
 115 
 116 
 117     // NATIVE METHODS
 118 
 119     private static native int nGetNumDevices();
 120     private static native String nGetName(int index);
 121     private static native String nGetVendor(int index);
 122     private static native String nGetDescription(int index);
 123     private static native String nGetVersion(int index);
 124 }


  87 
  88     MidiDevice[] getDeviceCache() { return devices; }
  89     void setDeviceCache(MidiDevice[] devices) { MidiOutDeviceProvider.devices = devices; }
  90     Info[] getInfoCache() { return infos; }
  91     void setInfoCache(Info[] infos) { MidiOutDeviceProvider.infos = infos; }
  92 
  93 
  94     // INNER CLASSES
  95 
  96     /**
  97      * Info class for MidiOutDevices.  Adds the
  98      * provider's Class to keep the provider class from being
  99      * unloaded.  Otherwise, at least on JDK1.1.7 and 1.1.8,
 100      * the provider class can be unloaded.  Then, then the provider
 101      * is next invoked, the static block is executed again and a new
 102      * instance of the device object is created.  Even though the
 103      * previous instance may still exist and be open / in use / etc.,
 104      * the new instance will not reflect that state...
 105      */
 106     static final class MidiOutDeviceInfo extends AbstractMidiDeviceProvider.Info {
 107         private final Class<?> providerClass;
 108 
 109         private MidiOutDeviceInfo(int index, Class<?> providerClass) {
 110             super(nGetName(index), nGetVendor(index), nGetDescription(index), nGetVersion(index), index);
 111             this.providerClass = providerClass;
 112         }
 113 
 114     } // class MidiOutDeviceInfo
 115 
 116 
 117     // NATIVE METHODS
 118 
 119     private static native int nGetNumDevices();
 120     private static native String nGetName(int index);
 121     private static native String nGetVendor(int index);
 122     private static native String nGetDescription(int index);
 123     private static native String nGetVersion(int index);
 124 }