/usr/include/libgda-5.0/libgda/gda-data-handler.h is in libgda-5.0-dev 5.2.4-9.
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* Copyright (C) 2006 - 2011 Vivien Malerba <malerba@gnome-db.org>
* Copyright (C) 2007 Murray Cumming <murrayc@murrayc.com>
* Copyright (C) 2010 David King <davidk@openismus.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GDA_DATA_HANDLER_H_
#define __GDA_DATA_HANDLER_H_
#include <glib-object.h>
#include "gda-decl.h"
#include "gda-value.h"
G_BEGIN_DECLS
#define GDA_TYPE_DATA_HANDLER (gda_data_handler_get_type())
#define GDA_DATA_HANDLER(obj) G_TYPE_CHECK_INSTANCE_CAST (obj, GDA_TYPE_DATA_HANDLER, GdaDataHandler)
#define GDA_IS_DATA_HANDLER(obj) G_TYPE_CHECK_INSTANCE_TYPE (obj, GDA_TYPE_DATA_HANDLER)
#define GDA_DATA_HANDLER_GET_IFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), GDA_TYPE_DATA_HANDLER, GdaDataHandlerIface))
/* struct for the interface */
struct _GdaDataHandlerIface
{
GTypeInterface g_iface;
/* virtual table */
gchar *(* get_sql_from_value) (GdaDataHandler *dh, const GValue *value);
gchar *(* get_str_from_value) (GdaDataHandler *dh, const GValue *value);
GValue *(* get_value_from_sql) (GdaDataHandler *dh, const gchar *sql, GType type);
GValue *(* get_value_from_str) (GdaDataHandler *dh, const gchar *str, GType type);
GValue *(* get_sane_init_value) (GdaDataHandler *dh, GType type);
gboolean (* accepts_g_type) (GdaDataHandler *dh, GType type);
const gchar *(* get_descr) (GdaDataHandler *dh);
};
/**
* SECTION:gda-data-handler
* @short_description: Interface which provides data handling (conversions) capabilities
* @title: GdaDataHandler
* @stability: Stable
* @see_also:
*
* Because data types vary a lot from a DBMS to another, the #GdaDataHandler interface helps
* managing data in its various representations, and converting from one to another:
* <itemizedlist>
* <listitem><para>as a #GValue which is a generic value container for the C language</para></listitem>
* <listitem><para>as a human readable string (in the user defined locale)</para></listitem>
* <listitem><para>as an SQL string (a string which can be used in SQL statements)</para></listitem>
* </itemizedlist>
*
* For each data type, a corresponding #GdaDataHandler object can be requested using the
* <link linkend="gda-data-handler-get-default">gda_data_handler_get_default()</link> function. However, when working
* with a specific database provider, it's better to use a #GdaDataHandler which may be specific to the
* database provider which will correctly handle each database specifics using
* <link linkend="gda-server-provider-get-data-handler-g-type">gda_server_provider_get_data_handler_g_type()</link> or
* <link linkend="gda-server-provider-get-data-handler-dbms">gda_server_provider_get_data_handler_dbms()</link>.
*/
GType gda_data_handler_get_type (void) G_GNUC_CONST;
/* Simple data manipulation */
gchar *gda_data_handler_get_sql_from_value (GdaDataHandler *dh, const GValue *value);
gchar *gda_data_handler_get_str_from_value (GdaDataHandler *dh, const GValue *value);
GValue *gda_data_handler_get_value_from_sql (GdaDataHandler *dh, const gchar *sql, GType type);
GValue *gda_data_handler_get_value_from_str (GdaDataHandler *dh, const gchar *str, GType type);
GValue *gda_data_handler_get_sane_init_value (GdaDataHandler *dh, GType type);
/* information about the data handler itself */
gboolean gda_data_handler_accepts_g_type (GdaDataHandler *dh, GType type);
const gchar *gda_data_handler_get_descr (GdaDataHandler *dh);
GdaDataHandler *gda_data_handler_get_default (GType for_type);
G_END_DECLS
#endif
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