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 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
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 ************************************************************************/

// no include "precompiled_dbaccess.hxx" because this file is meant to
// be included in other cxx files

#ifndef _REGISTRATIONHELPER_CXX_INCLUDED_INDIRECTLY_
#error "don't build this file directly! use dbu_reghelper.cxx instead!"
#endif

using namespace ::com::sun::star;
using namespace ::comphelper;
using namespace ::cppu;

uno::Sequence< ::rtl::OUString >*				    OModuleRegistration::s_pImplementationNames = NULL;
uno::Sequence< uno::Sequence< ::rtl::OUString > >*	OModuleRegistration::s_pSupportedServices = NULL;
uno::Sequence< sal_Int64 >*		            OModuleRegistration::s_pCreationFunctionPointers = NULL;
uno::Sequence< sal_Int64 >*				    OModuleRegistration::s_pFactoryFunctionPointers = NULL;

//--------------------------------------------------------------------------
void OModuleRegistration::registerComponent(
	const ::rtl::OUString& _rImplementationName,
	const uno::Sequence< ::rtl::OUString >& _rServiceNames,
	ComponentInstantiation _pCreateFunction,
	FactoryInstantiation _pFactoryFunction)
{
	if (!s_pImplementationNames)
	{
		OSL_ENSURE(!s_pSupportedServices && !s_pCreationFunctionPointers && !s_pFactoryFunctionPointers,
			"OModuleRegistration::registerComponent : inconsistent state (the pointers (1)) !");
		s_pImplementationNames = new uno::Sequence< ::rtl::OUString >;
		s_pSupportedServices = new uno::Sequence< uno::Sequence< ::rtl::OUString > >;
		s_pCreationFunctionPointers = new uno::Sequence< sal_Int64 >;
		s_pFactoryFunctionPointers = new uno::Sequence< sal_Int64 >;
	}
	OSL_ENSURE(s_pImplementationNames && s_pSupportedServices && s_pCreationFunctionPointers && s_pFactoryFunctionPointers,
		"OModuleRegistration::registerComponent : inconsistent state (the pointers (2)) !");

	OSL_ENSURE(	(s_pImplementationNames->getLength() == s_pSupportedServices->getLength())
				&&	(s_pImplementationNames->getLength() == s_pCreationFunctionPointers->getLength())
				&&	(s_pImplementationNames->getLength() == s_pFactoryFunctionPointers->getLength()),
		"OModuleRegistration::registerComponent : inconsistent state !");

	sal_Int32 nOldLen = s_pImplementationNames->getLength();
	s_pImplementationNames->realloc(nOldLen + 1);
	s_pSupportedServices->realloc(nOldLen + 1);
	s_pCreationFunctionPointers->realloc(nOldLen + 1);
	s_pFactoryFunctionPointers->realloc(nOldLen + 1);

	s_pImplementationNames->getArray()[nOldLen] = _rImplementationName;
	s_pSupportedServices->getArray()[nOldLen] = _rServiceNames;
	s_pCreationFunctionPointers->getArray()[nOldLen] = reinterpret_cast<sal_Int64>(_pCreateFunction);
	s_pFactoryFunctionPointers->getArray()[nOldLen] = reinterpret_cast<sal_Int64>(_pFactoryFunction);
}

//--------------------------------------------------------------------------
void OModuleRegistration::revokeComponent(const ::rtl::OUString& _rImplementationName)
{
	if (!s_pImplementationNames)
	{
		OSL_ENSURE(sal_False, "OModuleRegistration::revokeComponent : have no class infos ! Are you sure called this method at the right time ?");
		return;
	}
	OSL_ENSURE(s_pImplementationNames && s_pSupportedServices && s_pCreationFunctionPointers && s_pFactoryFunctionPointers,
		"OModuleRegistration::revokeComponent : inconsistent state (the pointers) !");
	OSL_ENSURE(	(s_pImplementationNames->getLength() == s_pSupportedServices->getLength())
				&&	(s_pImplementationNames->getLength() == s_pCreationFunctionPointers->getLength())
				&&	(s_pImplementationNames->getLength() == s_pFactoryFunctionPointers->getLength()),
		"OModuleRegistration::revokeComponent : inconsistent state !");

	sal_Int32 nLen = s_pImplementationNames->getLength();
	const ::rtl::OUString* pImplNames = s_pImplementationNames->getConstArray();
	for (sal_Int32 i=0; i<nLen; ++i, ++pImplNames)
	{
		if (pImplNames->equals(_rImplementationName))
		{
			removeElementAt(*s_pImplementationNames, i);
			removeElementAt(*s_pSupportedServices, i);
			removeElementAt(*s_pCreationFunctionPointers, i);
			removeElementAt(*s_pFactoryFunctionPointers, i);
			break;
		}
	}

	if (s_pImplementationNames->getLength() == 0)
	{
		delete s_pImplementationNames; s_pImplementationNames = NULL;
		delete s_pSupportedServices; s_pSupportedServices = NULL;
		delete s_pCreationFunctionPointers; s_pCreationFunctionPointers = NULL;
		delete s_pFactoryFunctionPointers; s_pFactoryFunctionPointers = NULL;
	}
}

//--------------------------------------------------------------------------
uno::Reference< uno::XInterface > OModuleRegistration::getComponentFactory(
	const ::rtl::OUString& _rImplementationName,
	const uno::Reference< lang::XMultiServiceFactory >& _rxServiceManager)
{
	OSL_ENSURE(_rxServiceManager.is(), "OModuleRegistration::getComponentFactory : invalid argument (service manager) !");
	OSL_ENSURE(_rImplementationName.getLength(), "OModuleRegistration::getComponentFactory : invalid argument (implementation name) !");

	if (!s_pImplementationNames)
	{
		OSL_ENSURE(sal_False, "OModuleRegistration::getComponentFactory : have no class infos ! Are you sure called this method at the right time ?");
		return NULL;
	}
	OSL_ENSURE(s_pImplementationNames && s_pSupportedServices && s_pCreationFunctionPointers && s_pFactoryFunctionPointers,
		"OModuleRegistration::getComponentFactory : inconsistent state (the pointers) !");
	OSL_ENSURE(	(s_pImplementationNames->getLength() == s_pSupportedServices->getLength())
				&&	(s_pImplementationNames->getLength() == s_pCreationFunctionPointers->getLength())
				&&	(s_pImplementationNames->getLength() == s_pFactoryFunctionPointers->getLength()),
		"OModuleRegistration::getComponentFactory : inconsistent state !");


	uno::Reference< uno::XInterface > xReturn;


	sal_Int32 nLen = s_pImplementationNames->getLength();
	const ::rtl::OUString* pImplName = s_pImplementationNames->getConstArray();
	const uno::Sequence< ::rtl::OUString >* pServices = s_pSupportedServices->getConstArray();
	const sal_Int64* pComponentFunction = s_pCreationFunctionPointers->getConstArray();
	const sal_Int64* pFactoryFunction = s_pFactoryFunctionPointers->getConstArray();

	for (sal_Int32 i=0; i<nLen; ++i, ++pImplName, ++pServices, ++pComponentFunction, ++pFactoryFunction)
	{
		if (pImplName->equals(_rImplementationName))
		{
			const FactoryInstantiation FactoryInstantiationFunction = reinterpret_cast<const FactoryInstantiation>(*pFactoryFunction);
			const ComponentInstantiation ComponentInstantiationFunction = reinterpret_cast<const ComponentInstantiation>(*pComponentFunction);

			xReturn = FactoryInstantiationFunction( _rxServiceManager, *pImplName, ComponentInstantiationFunction, *pServices, NULL);
			if (xReturn.is())
			{
				xReturn->acquire();
				return xReturn.get();
			}
		}
	}

	return NULL;
}