com.jniwrapper.win32.com
Interface IUnknown

All Superinterfaces:

AutoDeleteParameter

All Known Subinterfaces:

IAdviseSink, IBindCtx, IClassFactory, IClassFactory2, IConnectionPoint, IConnectionPointContainer, IContinueCallback, ICreateErrorInfo, IDataObject, IDispatch, IDispatchEx, IDocHostUIHandler, IDocHostUIHandler2, IDropSource, IDropTarget, IEnumConnectionPoints, IEnumConnections, IEnumFormatEtc, IEnumMoniker, IEnumOleDocumentViews, IEnumOleVerb, IEnumStatData, IEnumStatStg, IEnumString, IEnumUnknown, IErrorInfo, IInPlacePrintPreview, ILockBytes, IMalloc, IMessageFilter, IMoniker, IObjectSafety, IObjectWithSite, IOleCache, IOleClientSite, IOleCommandTarget, IOleContainer, IOleControl, IOleControlSite, IOleDocument, IOleDocumentSite, IOleDocumentView, IOleInPlaceActiveObject, IOleInPlaceFrame, IOleInPlaceObject, IOleInPlaceSite, IOleInPlaceSiteEx, IOleInPlaceUIWindow, IOleLink, IOleObject, IOleWindow, IParseDisplayName, IPersist, IPersistFile, IPersistStorage, IPersistStream, IPersistStreamInit, IPreviewCallback, IPrint, IPropertyNotifySink, IProvideClassInfo, IRecordInfo, IRootStorage, IRunningObjectTable, ISequentialStream, IServiceProvider, IStorage, IStream, ISupportErrorInfo, ITypeComp, ITypeInfo, ITypeLib, IViewObject, IViewObject2

All Known Implementing Classes:

AbstractOleControl, IAdviseSinkImpl, IBindCtxImpl, IClassFactory2Impl, IClassFactoryImpl, IClassFactoryServer, IConnectionPointContainerImpl, IConnectionPointImpl, IContinueCallbackImpl, ICreateErrorInfoImpl, IDataObjectImpl, IDispatchExImpl, IDispatchImpl, IDispatchServer, IDocHostUIHandler2Impl, IDocHostUIHandlerImpl, IDropSourceImpl, IDropTargetImpl, IEnumConnectionPointsImpl, IEnumConnectionsImpl, IEnumFormatEtcImpl, IEnumMonikerImpl, IEnumOleDocumentViewsImpl, IEnumOleVerbImpl, IEnumStatDataImpl, IEnumStatStgImpl, IEnumStringImpl, IEnumUnknownImpl, IErrorInfoImpl, IInPlacePrintPreviewImpl, ILockBytesImpl, IMallocImpl, IMessageFilterImpl, IMonikerImpl, IObjectSafetyImpl, IObjectWithSiteImpl, IOleCacheImpl, IOleClientSiteImpl, IOleCommandTargetImpl, IOleContainerImpl, IOleControlImpl, IOleControlSiteImpl, IOleDocumentImpl, IOleDocumentSiteImpl, IOleDocumentViewImpl, IOleInPlaceActiveObjectImpl, IOleInPlaceFrameImpl, IOleInPlaceObjectImpl, IOleInPlaceSiteExImpl, IOleInPlaceSiteImpl, IOleInPlaceUIWindowImpl, IOleLinkImpl, IOleObjectImpl, IOleWindowImpl, IParseDisplayNameImpl, IPersistFileImpl, IPersistImpl, IPersistStorageImpl, IPersistStreamImpl, IPersistStreamInitImpl, IPreviewCallbackImpl, IPrintImpl, IPropertyNotifySinkImpl, IProvideClassInfoImpl, IRecordInfoImpl, IRootStorageImpl, IRunningObjectTableImpl, ISequentialStreamImpl, IServiceProviderImpl, IStorageImpl, IStreamImpl, ISupportErrorInfoImpl, ITypeCompImpl, ITypeInfoImpl, ITypeLibImpl, IUnknownImpl, IUnknownServer, IViewObject2Impl, IViewObjectImpl, OleClientSiteImpl, StructureInfo

public interface IUnknown

extends AutoDeleteParameter

The IUnknown interface allows to get other interfaces of an object using the queryInterface method and to manage the existence of the object using the addRef and release methods.

See Also:

Microsoft COM SDK documentation

Field Summary

static java.lang.String

INTERFACE_IDENTIFIER

Method Summary

ULongInt	addRef() Increments the reference count for an interface on an object.
boolean	isNull()
void	queryInterface(IID iid, IUnknown requiredInterface) Retrieves pointers to the supported interfaces on an object.
ULongInt	release() Decrements the reference count for an interface on an object.
void	setNull()

Methods inherited from interface com.jniwrapper.AutoDeleteParameter

isAutoDelete, setAutoDelete

Field Detail

INTERFACE_IDENTIFIER

public static final java.lang.String INTERFACE_IDENTIFIER

See Also:

Constant Field Values

Method Detail

isNull

public boolean isNull()

setNull

public void setNull()

queryInterface

public void queryInterface(IID iid,
                           IUnknown requiredInterface)
                    throws ComException

Retrieves pointers to the supported interfaces on an object.

Parameters:

iid - [in]

requiredInterface - [out]

Throws:

ComException - if the interface is not supported

addRef

public ULongInt addRef()

Increments the reference count for an interface on an object.

Returns:

new reference count. This value is intended to be used only for test purposes.

release

public ULongInt release()

Decrements the reference count for an interface on an object.

Returns:

new reference count. This value is intended to be used only for test purposes.