// file      : odb/oracle/connection.hxx
// author    : Constantin Michael <constantin@codesynthesis.com>
// copyright : Copyright (c) 2005-2011 Code Synthesis Tools CC
// license   : ODB NCUEL; see accompanying LICENSE file

#ifndef ODB_ORACLE_CONNECTION_HXX
#define ODB_ORACLE_CONNECTION_HXX

#include <odb/pre.hxx>

#include <vector>
#include <memory> // std::auto_ptr

#include <odb/forward.hxx>
#include <odb/connection.hxx>

#include <odb/details/shared-ptr.hxx>
#include <odb/details/buffer.hxx>

#include <odb/oracle/version.hxx>
#include <odb/oracle/forward.hxx>
#include <odb/oracle/transaction-impl.hxx>
#include <odb/oracle/auto-handle.hxx>
#include <odb/oracle/oracle-fwd.hxx>

#include <odb/oracle/details/export.hxx>

namespace odb
{
  namespace oracle
  {
    class statement;
    class statement_cache;

    class connection;
    typedef details::shared_ptr<connection> connection_ptr;

    class LIBODB_ORACLE_EXPORT connection: public odb::connection
    {
    public:
      typedef oracle::statement_cache statement_cache_type;
      typedef oracle::database database_type;

      virtual
      ~connection ();

      connection (database_type&);
      connection (database_type&, OCISvcCtx* handle);

      database_type&
      database ()
      {
        return db_;
      }

    public:
      virtual transaction_impl*
      begin ();

    public:
      using odb::connection::execute;

      virtual unsigned long long
      execute (const char* statement, std::size_t length);

    public:
      OCISvcCtx*
      handle ()
      {
        return handle_;
      }

      OCIError*
      error_handle ()
      {
        return error_;
      }

      statement_cache_type&
      statement_cache ()
      {
        return *statement_cache_;
      }

      details::buffer&
      lob_buffer ()
      {
        return lob_buffer_;
      }

    private:
      connection (const connection&);
      connection& operator= (const connection&);

    private:
      database_type& db_;

      // It is important that the error_ member is declared before the
      // handle_ member as handle_ depends on error_ during destruction.
      //
      auto_handle<OCIError> error_;

      auto_handle<OCISvcCtx> handle_;

      std::auto_ptr<statement_cache_type> statement_cache_;

      details::buffer lob_buffer_;
    };
  }
}

#include <odb/post.hxx>

#endif // ODB_ORACLE_CONNECTION_HXX