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// file : odb/oracle/auto-descriptor.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_AUTO_DESCRIPTOR_HXX
#define ODB_ORACLE_AUTO_DESCRIPTOR_HXX
#include <odb/pre.hxx>
#include <odb/oracle/version.hxx>
#include <odb/oracle/oracle-fwd.hxx>
#include <odb/oracle/details/export.hxx>
namespace odb
{
namespace oracle
{
enum descriptor_type
{
dt_param,
dt_lob,
dt_timestamp,
dt_interval_ym,
dt_interval_ds,
dt_default,
};
LIBODB_ORACLE_EXPORT void
oci_descriptor_free (void* descriptor, descriptor_type type);
//
// descriptor_type_traits
//
template <typename D>
struct default_descriptor_type_traits;
template <>
struct default_descriptor_type_traits<OCIParam>
{ static const descriptor_type dtype = dt_param; };
template <>
struct default_descriptor_type_traits<OCILobLocator>
{ static const descriptor_type dtype = dt_lob; };
//
// auto_descriptor_base
//
template <typename D, descriptor_type type>
struct auto_descriptor_base
{
static void
release (D* d)
{
oci_descriptor_free (d, type);
}
};
template <typename D>
struct auto_descriptor_base<D, dt_default>
{
static void
release (D* d)
{
oci_descriptor_free (d, default_descriptor_type_traits<D>::dtype);
}
};
//
// auto_descriptor
//
template <typename D, descriptor_type type = dt_default>
class auto_descriptor: auto_descriptor_base<D, type>
{
public:
auto_descriptor (D* d = 0)
: d_ (d)
{
}
~auto_descriptor ()
{
if (d_ != 0)
release (d_);
}
operator D* () const
{
return d_;
}
D*&
get ()
{
return d_;
}
D*
get () const
{
return d_;
}
void
reset (D* d = 0)
{
if (d_ != 0)
release (d_);
d_ = d;
}
private:
auto_descriptor (const auto_descriptor&);
auto_descriptor& operator= (const auto_descriptor&);
protected:
D* d_;
};
}
}
#include <odb/post.hxx>
#endif // ODB_ORACLE_AUTO_DESCRIPTOR_HXX
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