/*************************************************************************
 *
 *  OpenOffice.org - a multi-platform office productivity suite
 *
 *  $RCSfile: registrationhelper.cxx,v $
 *
 *  $Revision: 1.13 $
 *
 *  last change: $Author: hr $ $Date: 2007-09-26 14:46:14 $
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 by Sun Microsystems, Inc.
 *    901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License version 2.1, as published by the Free Software Foundation.
 *
 *    This library 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 for more details.
 *
 *    You should have received a copy of the GNU Lesser General Public
 *    License along with this library; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *    MA  02111-1307  USA
 *
 ************************************************************************/

// 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 dba_reghelper.cxx or 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;
    }
}

//--------------------------------------------------------------------------
sal_Bool OModuleRegistration::writeComponentInfos(
        const uno::Reference< lang::XMultiServiceFactory >& /*_rxServiceManager*/,
        const uno::Reference< registry::XRegistryKey >& _rxRootKey)
{
    OSL_ENSURE(_rxRootKey.is(), "OModuleRegistration::writeComponentInfos : invalid argument !");

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

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

    ::rtl::OUString sRootKey("/", 1, RTL_TEXTENCODING_ASCII_US);
    for (sal_Int32 i=0; i<nLen; ++i, ++pImplName, ++pServices)
    {
        ::rtl::OUString aMainKeyName(sRootKey);
        aMainKeyName += *pImplName;
        aMainKeyName += ::rtl::OUString::createFromAscii("/UNO/SERVICES");

        try
        {
            uno::Reference< registry::XRegistryKey >  xNewKey( _rxRootKey->createKey(aMainKeyName) );

            const ::rtl::OUString* pService = pServices->getConstArray();
            for (sal_Int32 j=0; j<pServices->getLength(); ++j, ++pService)
                xNewKey->createKey(*pService);
        }
        catch(uno::Exception const&)
        {
            OSL_ENSURE(sal_False, "OModuleRegistration::writeComponentInfos : something went wrong while creating the keys !");
            return sal_False;
        }
    }

    return sal_True;
}

//--------------------------------------------------------------------------
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;
}