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/* mg-db-constraint.h
*
* Copyright (C) 2003 Vivien Malerba
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#ifndef __MG_DB_CONSTRAINT_H_
#define __MG_DB_CONSTRAINT_H_
#include "mg-base.h"
#include "mg-ref-base.h"
#include "mg-defs.h"
G_BEGIN_DECLS
#define MG_DB_CONSTRAINT_TYPE (mg_db_constraint_get_type())
#define MG_DB_CONSTRAINT(obj) G_TYPE_CHECK_INSTANCE_CAST (obj, mg_db_constraint_get_type(), MgDbConstraint)
#define MG_DB_CONSTRAINT_CLASS(klass) G_TYPE_CHECK_CLASS_CAST (klass, mg_db_constraint_get_type (), MgDbConstraintClass)
#define IS_MG_DB_CONSTRAINT(obj) G_TYPE_CHECK_INSTANCE_TYPE (obj, mg_db_constraint_get_type ())
/* error reporting */
extern GQuark mg_db_constraint_error_quark (void);
#define MG_DB_CONSTRAINT_ERROR mg_db_constraint_error_quark ()
enum
{
MG_DB_CONSTRAINT_XML_SAVE_ERROR,
MG_DB_CONSTRAINT_XML_LOAD_ERROR
};
typedef enum
{
CONSTRAINT_PRIMARY_KEY,
CONSTRAINT_FOREIGN_KEY,
CONSTRAINT_UNIQUE,
CONSTRAINT_NOT_NULL,
CONSTRAINT_CHECK_EXPR,
CONSTRAINT_UNKNOWN
} MgDbConstraintType;
typedef enum
{
CONSTRAINT_FK_ACTION_CASCADE,
CONSTRAINT_FK_ACTION_SET_NULL,
CONSTRAINT_FK_ACTION_SET_DEFAULT,
CONSTRAINT_FK_ACTION_SET_VALUE,
CONSTRAINT_FK_ACTION_NO_ACTION
} MgDbConstraintFkAction;
typedef struct
{
MgDbField *fkey;
MgDbField *ref_pkey;
MgRefBase *ref_pkey_repl; /* can be used instead of ref_pkey, the object will fill ref_pkey itself */
} MgDbConstraintFkeyPair;
#define MG_DB_CONSTRAINT_FK_PAIR(x) ((MgDbConstraintFkeyPair*) (x))
/* struct for the object's data */
struct _MgDbConstraint
{
MgBase object;
MgDbConstraintPrivate *priv;
};
/* struct for the object's class */
struct _MgDbConstraintClass
{
MgBaseClass class;
/* signals */
void (*templ_signal) (MgDbConstraint *obj);
};
guint mg_db_constraint_get_type (void);
GObject *mg_db_constraint_new (MgDbTable *table, MgDbConstraintType type);
GObject *mg_db_constraint_new_with_db (MgDatabase *db);
MgDbConstraintType mg_db_constraint_get_constraint_type (MgDbConstraint *cstr);
gboolean mg_db_constraint_equal (MgDbConstraint *cstr1, MgDbConstraint *cstr2);
MgDbTable *mg_db_constraint_get_table (MgDbConstraint *cstr);
gboolean mg_db_constraint_uses_field (MgDbConstraint *cstr, MgDbField *field);
/* Primary KEY specific */
void mg_db_constraint_pkey_set_fields (MgDbConstraint *cstr, const GSList *fields);
GSList *mg_db_constraint_pkey_get_fields (MgDbConstraint *cstr);
/* Foreign KEY specific */
void mg_db_constraint_fkey_set_fields (MgDbConstraint *cstr, const GSList *pairs);
MgDbTable *mg_db_constraint_fkey_get_ref_table (MgDbConstraint *cstr);
GSList *mg_db_constraint_fkey_get_fields (MgDbConstraint *cstr);
void mg_db_constraint_fkey_set_actions (MgDbConstraint *cstr,
MgDbConstraintFkAction on_update,
MgDbConstraintFkAction on_delete);
void mg_db_constraint_fkey_get_actions (MgDbConstraint *cstr,
MgDbConstraintFkAction *on_update,
MgDbConstraintFkAction *on_delete);
/* UNIQUE specific */
void mg_db_constraint_unique_set_fields (MgDbConstraint *cstr, const GSList *fields);
GSList *mg_db_constraint_unique_get_fields (MgDbConstraint *cstr);
/* NOT NULL specific */
void mg_db_constraint_not_null_set_field (MgDbConstraint *cstr, MgDbField *field);
MgDbField *mg_db_constraint_not_null_get_field (MgDbConstraint *cstr);
/* Check specific */
/* TODO */
G_END_DECLS
#endif
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