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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
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 *
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#include "componentmodule.hxx"
#include <tools/resmgr.hxx>
#include <svl/solar.hrc>
#include <comphelper/sequence.hxx>
#include <tools/debug.hxx>

#define ENTER_MOD_METHOD()	\
    ::osl::MutexGuard aGuard(s_aMutex);	\
    ensureImpl()
    
//.........................................................................
namespace COMPMOD_NAMESPACE
{
//.........................................................................

    using namespace ::com::sun::star::uno;
    using namespace ::com::sun::star::lang;
    using namespace ::com::sun::star::registry;
    using namespace ::comphelper;
    using namespace ::cppu;

    //=========================================================================
    //= OModuleImpl
    //=========================================================================
    /** implementation for <type>OModule</type>. not threadsafe, has to be guarded by it's owner
    */
    class OModuleImpl
    {
        ResMgr*		m_pRessources;
        sal_Bool	m_bInitialized;
        ByteString	m_sFilePrefix;

    public:
        /// ctor
        OModuleImpl();
        ~OModuleImpl();

        /// get the manager for the ressources of the module
        ResMgr*	getResManager();
        void	setResourceFilePrefix(const ::rtl::OString& _rPrefix) { m_sFilePrefix = _rPrefix; }
    };

    //-------------------------------------------------------------------------
    OModuleImpl::OModuleImpl()
        :m_pRessources(NULL)
        ,m_bInitialized(sal_False)
    {
    }

    //-------------------------------------------------------------------------
    OModuleImpl::~OModuleImpl()
    {
        if (m_pRessources)
            delete m_pRessources;
    }

    //-------------------------------------------------------------------------
    ResMgr*	OModuleImpl::getResManager()
    {
        // note that this method is not threadsafe, which counts for the whole class !
        if (!m_pRessources && !m_bInitialized)
        {
            DBG_ASSERT(m_sFilePrefix.Len(), "OModuleImpl::getResManager: no resource file prefix!");
            // create a manager with a fixed prefix
            ByteString aMgrName = m_sFilePrefix;

            m_pRessources = ResMgr::CreateResMgr(aMgrName.GetBuffer());
            DBG_ASSERT(m_pRessources, 
                    (ByteString("OModuleImpl::getResManager: could not create the resource manager (file name: ")
                +=	aMgrName
                +=	ByteString(")!")).GetBuffer());

            m_bInitialized = sal_True;
        }
        return m_pRessources;
    }

    //=========================================================================
    //= OModule
    //=========================================================================
    ::osl::Mutex	OModule::s_aMutex;
    sal_Int32		OModule::s_nClients = 0;
    OModuleImpl*	OModule::s_pImpl = NULL;
    ::rtl::OString	OModule::s_sResPrefix;
    //-------------------------------------------------------------------------
    ResMgr*	OModule::getResManager()
    {
        ENTER_MOD_METHOD();
        return s_pImpl->getResManager();
    }

    //-------------------------------------------------------------------------
    void OModule::setResourceFilePrefix(const ::rtl::OString& _rPrefix)
    {
        ::osl::MutexGuard aGuard(s_aMutex);
        s_sResPrefix = _rPrefix;
        if (s_pImpl)
            s_pImpl->setResourceFilePrefix(_rPrefix);
    }

    //-------------------------------------------------------------------------
    void OModule::registerClient()
    {
        ::osl::MutexGuard aGuard(s_aMutex);
        ++s_nClients;
    }

    //-------------------------------------------------------------------------
    void OModule::revokeClient()
    {
        ::osl::MutexGuard aGuard(s_aMutex);
        if (!--s_nClients && s_pImpl)
        {
            delete s_pImpl;
            s_pImpl = NULL;
        }
    }

    //-------------------------------------------------------------------------
    void OModule::ensureImpl()
    {
        if (s_pImpl)
            return;
        s_pImpl = new OModuleImpl();
        s_pImpl->setResourceFilePrefix(s_sResPrefix);
    }

    //--------------------------------------------------------------------------
    //- registration helper
    //--------------------------------------------------------------------------

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

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

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

        if (!s_pImplementationNames)
        {
            OSL_FAIL("OModule::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,
            "OModule::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()),
            "OModule::getComponentFactory : inconsistent state !");


        Reference< XInterface > xReturn;


        sal_Int32 nLen = s_pImplementationNames->getLength();
        const ::rtl::OUString* pImplName = s_pImplementationNames->getConstArray();
        const 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;
    }


//.........................................................................
}	// namespace COMPMOD_NAMESPACE
//.........................................................................

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