/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



#ifndef _DBAUI_ODBC_CONFIG_HXX_
#define _DBAUI_ODBC_CONFIG_HXX_

#include "commontypes.hxx"

#if defined(WNT) || defined (UNX) || defined (OS2)
#define HAVE_ODBC_SUPPORT
#endif

#if ( defined(WNT) || defined (OS2) ) && defined(HAVE_ODBC_SUPPORT)
#define HAVE_ODBC_ADMINISTRATION
#endif

#include <tools/link.hxx>
#include <osl/module.h>

#include <memory>

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

//=========================================================================
//= OOdbcLibWrapper
//=========================================================================
/** base for helper classes wrapping functionality from an ODBC library
*/
class OOdbcLibWrapper
{
	oslModule			m_pOdbcLib;		// the library handle
	::rtl::OUString		m_sLibPath;		// the path to the library

public:
#ifdef HAVE_ODBC_SUPPORT
	sal_Bool	isLoaded() const { return NULL != m_pOdbcLib; }
#else
	sal_Bool	isLoaded() const { return sal_False; }
#endif
	::rtl::OUString getLibraryName() const { return m_sLibPath; }

protected:
#ifndef HAVE_ODBC_SUPPORT
	OOdbcLibWrapper() : m_pOdbcLib(NULL) { }
#else
	OOdbcLibWrapper();
#endif
	~OOdbcLibWrapper();

	oslGenericFunction  loadSymbol(const sal_Char* _pFunctionName);

	/// load the lib
	sal_Bool	load(const sal_Char* _pLibPath);
	/// unload the lib
	void		unload();
};

//=========================================================================
//= OOdbcEnumeration
//=========================================================================
struct OdbcTypesImpl;
class OOdbcEnumeration : public OOdbcLibWrapper
{
#ifdef HAVE_ODBC_SUPPORT
	// entry points for ODBC administration
	oslGenericFunction  m_pAllocHandle;
	oslGenericFunction  m_pFreeHandle;
	oslGenericFunction  m_pSetEnvAttr;
	oslGenericFunction  m_pDataSources;

#endif
	OdbcTypesImpl*	m_pImpl;
		// needed because we can't have a member of type SQLHANDLE: this would require us to include the respective
		// ODBC file, which would lead to a lot of conflicts with other includes

public:
	OOdbcEnumeration();
	~OOdbcEnumeration();

	void		getDatasourceNames(StringBag& _rNames);

protected:
	/// ensure that an ODBC environment is allocated
	sal_Bool	allocEnv();
	/// free any allocated ODBC environment
	void		freeEnv();
};

//=========================================================================
//= OOdbcManagement
//=========================================================================
#ifdef HAVE_ODBC_ADMINISTRATION
class ProcessTerminationWait;
class OOdbcManagement
{
    ::std::auto_ptr< ProcessTerminationWait >   m_pProcessWait;
    Link                                        m_aAsyncFinishCallback;

public:
	OOdbcManagement( const Link& _rAsyncFinishCallback );
    ~OOdbcManagement();

	bool    manageDataSources_async();
    bool    isRunning() const;
};
#endif

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

#endif // _DBAUI_ODBC_CONFIG_HXX_