Package com.sun.jna

Interface Callback

All Known Subinterfaces:
CallbackProxy, Carbon.EventHandlerProcPtr, Ddeml.DdeCallback, DispatchVTable.AddRefCallback, DispatchVTable.GetIDsOfNamesCallback, DispatchVTable.GetTypeInfoCallback, DispatchVTable.GetTypeInfoCountCallback, DispatchVTable.InvokeCallback, DispatchVTable.QueryInterfaceCallback, DispatchVTable.ReleaseCallback, DLLCallback, StdCallLibrary.StdCallCallback, UnknownVTable.AddRefCallback, UnknownVTable.QueryInterfaceCallback, UnknownVTable.ReleaseCallback, WinBase.EnumResNameProc, WinBase.EnumResTypeProc, WinBase.FE_EXPORT_FUNC, WinBase.FE_IMPORT_FUNC, WinBase.THREAD_START_ROUTINE, WinCrypt.CryptGetSignerCertificateCallback, WinNT.OVERLAPPED_COMPLETION_ROUTINE, WinRas.RasDialFunc2, Winsvc.Handler, Winsvc.HandlerEx, Winsvc.SERVICE_MAIN_FUNCTION, WinUser.HOOKPROC, WinUser.LowLevelKeyboardProc, WinUser.LowLevelMouseProc, WinUser.MONITORENUMPROC, WinUser.WindowProc, WinUser.WinEventProc, WinUser.WNDENUMPROC, X11.XErrorHandler
All Known Implementing Classes:
DdemlUtil.DdeAdapter
public interface Callback
All callback definitions must derive from this interface. Any derived interfaces must define a single public method (which may not be named "hashCode", "equals", or "toString"), or one public method named "callback". You are responsible for deregistering your callback (if necessary). If native code attempts to call a callback which has been GC'd, you will likely crash the VM. If there is no method to deregister the callback (e.g. atexit in the C library), you must ensure that you always keep a live reference to the callback object.

A callback should generally never throw an exception, since it doesn't necessarily have an encompassing Java environment to catch it. Any exceptions thrown will be passed to the default callback exception handler.

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Interface
    Description
    static interface 
    Callback.UncaughtExceptionHandler
     

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final List<String>
    FORBIDDEN_NAMES
    These method names may not be used for a callback method.
    static final String
    METHOD_NAME
    You must use this method name if your callback interface has multiple public methods.

  • Field Details

    • METHOD_NAME

      static final String METHOD_NAME
      You must use this method name if your callback interface has multiple public methods. Typically a callback will have only one such method, in which case any method name may be used, with the exception of those in FORBIDDEN_NAMES.
      See Also:

    • FORBIDDEN_NAMES

      static final List<String> FORBIDDEN_NAMES
      These method names may not be used for a callback method.