CallbackReference (JNA API)

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JNA API 3.2.7

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com.sun.jna
Class CallbackReference

java.lang.Object
  java.lang.ref.Reference<T>
      java.lang.ref.WeakReference
          com.sun.jna.CallbackReference

class CallbackReference
extends WeakReference
extends WeakReference

Provides a reference to an association between a native callback closure and a Java Callback closure.

Field Summary
`(package private) static Map`	`allocations`
`(package private) static Map`	`callbackMap`
`(package private) Pointer`	`cbstruct`
`(package private) static Map`	`directCallbackMap`
`(package private) Method`	`method`
`(package private) CallbackProxy`	`proxy`

Method Summary
`protected void`	`finalize()` Free native resources associated with this callback.
`(package private) static Class`	`findCallbackClass(Class type)` Find the first instance of an interface which implements the Callback interface or an interface derived from Callback, which defines an appropriate callback method.
`static Callback`	`getCallback(Class type, Pointer p)` Return a Callback associated with the given function pointer.
`static Pointer`	`getFunctionPointer(Callback cb)` Return a `Pointer` to the native function address for the given callback.
`Pointer`	`getTrampoline()` Obtain a pointer to the native glue code for this callback.

Methods inherited from class java.lang.ref.Reference
`clear, enqueue, get, isEnqueued`

Methods inherited from class java.lang.Object
`clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

callbackMap

static final Map callbackMap

directCallbackMap

static final Map directCallbackMap

allocations

static final Map allocations

cbstruct

Pointer cbstruct

proxy

CallbackProxy proxy

method

Method method

Method Detail

getCallback

public static Callback getCallback(Class type,
                                   Pointer p)

Return a Callback associated with the given function pointer. If the pointer refers to a Java callback trampoline, return the original Java Callback. Otherwise, return a proxy to the native function pointer.

findCallbackClass

static Class findCallbackClass(Class type)

Find the first instance of an interface which implements the Callback interface or an interface derived from Callback, which defines an appropriate callback method.

getTrampoline

public Pointer getTrampoline()

Obtain a pointer to the native glue code for this callback.

finalize

protected void finalize()

Free native resources associated with this callback.

Overrides:: finalize in class Object

getFunctionPointer

public static Pointer getFunctionPointer(Callback cb)

Return a Pointer to the native function address for the given callback.