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/* mg-work-core.h
*
* Copyright (C) 2002 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_WORK_CORE__
#define __MG_WORK_CORE__
#include "mg-base.h"
#include "mg-defs.h"
G_BEGIN_DECLS
#define MG_WORK_CORE_TYPE (mg_work_core_get_type())
#define MG_WORK_CORE(obj) G_TYPE_CHECK_INSTANCE_CAST (obj, mg_work_core_get_type(), MgWorkCore)
#define MG_WORK_CORE_CLASS(klass) G_TYPE_CHECK_CLASS_CAST (klass, mg_work_core_get_type (), MgWorkCoreClass)
#define IS_MG_WORK_CORE(obj) G_TYPE_CHECK_INSTANCE_TYPE (obj, mg_work_core_get_type ())
typedef struct _MgWorkCore MgWorkCore;
typedef struct _MgWorkCoreClass MgWorkCoreClass;
typedef struct _MgWorkCorePriv MgWorkCorePriv;
typedef struct _MgWorkCoreNode MgWorkCoreNode;
/* struct for the object's data */
struct _MgWorkCore
{
MgBase object;
MgContext *args_context; /* for the parameters required to run the SELECT query */
MgContext *work_context; /* for the parameters required to run the modif queries */
MgTarget *modif_target; /* target which gets the modifications, or NULL */
GHashTable *work_context_qf_position; /* key=a MgQfField of any query in any context of 'work_context';
value=pos in 'data_rs' of the corresponding field */
/* All the queries are owned by the object */
MgQuery *query_select;
MgQuery *query_update;
MgQuery *query_delete;
MgQuery *query_insert;
/* result of the execution of 'query_select' */
MgResultSet *data_rs;
/* 'work_core' parameters's and fields information */
GSList *nodes; /* params which appear in 'data_rs' (MgWorkCoreNode structs) and their pos. */
GSList *params_in_data_rs;
GSList *params_not_in_data_rs;
/* list of the MgParameter objects which are really value providers for the modif queries */
GSList *params_modif_queries_value_providers;
/* list of parameters for which the corresponding data entry should be hidden */
GSList *no_show_params;
MgWorkCorePriv *priv;
};
struct _MgWorkCoreNode
{
MgParameter *param; /* each param in the query_select is also present in the 'work_context' and is only referenced there */
gint position; /* field position in query_select (and in the 'data_rs' MgResultSet) */
};
#define MG_WORK_CORE_NODE(x) ((MgWorkCoreNode *)x)
/* struct for the object's class */
struct _MgWorkCoreClass
{
MgBaseClass parent_class;
};
/*
* Generic object's methods
*/
guint mg_work_core_get_type (void);
GObject *mg_work_core_new (MgQuery *query, MgTarget *modified);
gboolean mg_work_core_run_select_query (MgWorkCore *core, GError **error);
MgParameter *mg_work_core_find_param (MgWorkCore *core, MgQfield *field, gboolean in_exec_context);
MgWorkCoreNode *mg_work_core_find_core_node (MgWorkCore *core, MgParameter *param);
MgContextNode *mg_work_core_find_context_node (MgWorkCore *core, MgQfield *field);
G_END_DECLS
#endif
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