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/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Copyright 2008 by Sun Microsystems, Inc.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * $RCSfile: moduledbu.hxx,v $
 * $Revision: 1.6 $
 *
 * 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.
 *
 ************************************************************************/

#ifndef _DBAUI_MODULE_DBU_HXX_
#define _DBAUI_MODULE_DBU_HXX_

#ifndef _OSL_MUTEX_HXX_
#include <osl/mutex.hxx>
#endif
#ifndef _TOOLS_RESID_HXX
#include <tools/resid.hxx>
#endif

class ResMgr;

//.........................................................................
namespace dbaui
{
//.........................................................................

//=========================================================================
//= OModule
//=========================================================================
class OModuleImpl;
class OModule
{
    friend class OModuleClient;

private:
    OModule();
        // not implemented. OModule is a static class

protected:
    static ::osl::Mutex	s_aMutex;		/// access safety
    static sal_Int32	s_nClients;		/// number of registered clients
    static OModuleImpl*	s_pImpl;		/// impl class. lives as long as at least one client for the module is registered

public:
    /// get the vcl res manager of the module
    static ResMgr*	getResManager();

protected:
    /// register a client for the module
    static void	registerClient();
    /// revoke a client for the module
    static void	revokeClient();

private:
    /** ensure that the impl class exists
        @precond m_aMutex is guarded when this method gets called
    */
    static void ensureImpl();
};

//=========================================================================
//= OModuleClient
//=========================================================================
/** base class for objects which uses any global module-specific ressources 
*/
class OModuleClient
{
public:
    OModuleClient()		{ OModule::registerClient(); }
    ~OModuleClient()	{ OModule::revokeClient(); }
};

//=========================================================================
//= ModuleRes
//=========================================================================
/** specialized ResId, using the ressource manager provided by the global module
*/
class ModuleRes : public ::ResId
{
public:
    ModuleRes(USHORT _nId) : ResId(_nId, *OModule::getResManager()) { }
};

//.........................................................................
}	// namespace dbaui
//.........................................................................

#endif // _DBAUI_MODULE_DBU_HXX_