AOO410/main/comphelper/inc/comphelper/servicehelper.hxx

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#ifndef _COMPHELPER_SERVICEHELPER_HXX_
#define _COMPHELPER_SERVICEHELPER_HXX_

/** the UNO3_GETIMPLEMENTATION_* macros  implement a static helper function
    that gives access to your implementation for a given interface reference,
	if possible.

	Example:
		MyClass* pClass = MyClass::getImplementation( xRef );

	Usage:
		Put a UNO3_GETIMPLEMENTATION_DECL( classname ) inside your class
		definitian and UNO3_GETIMPLEMENTATION_IMPL( classname ) inside
		your cxx file. Your class must inherit ::com::sun::star::uno::XUnoTunnel
		and export it with queryInterface. Implementation of XUnoTunnel is
		done by this macro.
*/
#define UNO3_GETIMPLEMENTATION_DECL( classname ) \
	static const ::com::sun::star::uno::Sequence< sal_Int8 > & getUnoTunnelId() throw(); \
	static classname* getImplementation( const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >& xInt ); \
    virtual sal_Int64 SAL_CALL getSomething( const ::com::sun::star::uno::Sequence< sal_Int8 >& aIdentifier ) throw(::com::sun::star::uno::RuntimeException);

#define UNO3_GETIMPLEMENTATION_BASE_IMPL( classname ) \
const ::com::sun::star::uno::Sequence< sal_Int8 > & classname::getUnoTunnelId() throw() \
{ \
	static ::com::sun::star::uno::Sequence< sal_Int8 > * pSeq = 0; \
	if( !pSeq ) \
	{ \
		::osl::Guard< ::osl::Mutex > aGuard( ::osl::Mutex::getGlobalMutex() ); \
		if( !pSeq ) \
		{ \
			static ::com::sun::star::uno::Sequence< sal_Int8 > aSeq( 16 ); \
			rtl_createUuid( (sal_uInt8*)aSeq.getArray(), 0, sal_True ); \
			pSeq = &aSeq; \
		} \
	} \
	return *pSeq; \
} \
\
classname* classname::getImplementation( const uno::Reference< uno::XInterface >& xInt ) \
{ \
	::com::sun::star::uno::Reference< ::com::sun::star::lang::XUnoTunnel > xUT( xInt, ::com::sun::star::uno::UNO_QUERY ); \
	if( xUT.is() ) \
		return reinterpret_cast<classname*>(sal::static_int_cast<sal_IntPtr>(xUT->getSomething( classname::getUnoTunnelId() ))); \
	else \
		return NULL; \
}

#define UNO3_GETIMPLEMENTATION_IMPL( classname )\
UNO3_GETIMPLEMENTATION_BASE_IMPL(classname)\
sal_Int64 SAL_CALL classname::getSomething( const ::com::sun::star::uno::Sequence< sal_Int8 >& rId ) throw(::com::sun::star::uno::RuntimeException) \
{ \
	if( rId.getLength() == 16 && 0 == rtl_compareMemory( getUnoTunnelId().getConstArray(), \
														 rId.getConstArray(), 16 ) ) \
	{ \
		return sal::static_int_cast<sal_Int64>(reinterpret_cast<sal_IntPtr>(this)); \
	} \
	return 0; \
}

#define UNO3_GETIMPLEMENTATION2_IMPL( classname, baseclass )\
UNO3_GETIMPLEMENTATION_BASE_IMPL(classname)\
sal_Int64 SAL_CALL classname::getSomething( const ::com::sun::star::uno::Sequence< sal_Int8 >& rId ) throw(::com::sun::star::uno::RuntimeException) \
{ \
	if( rId.getLength() == 16 && 0 == rtl_compareMemory( getUnoTunnelId().getConstArray(), \
														 rId.getConstArray(), 16 ) ) \
	{ \
		return sal::static_int_cast<sal_Int64>(reinterpret_cast<sal_IntPtr>(this)); \
	} \
	else \
	{ \
		return baseclass::getSomething( rId ); \
	} \
}


#endif // _COMPHELPER_SERVICEHELPER_HXX_