/usr/include/libgda-5.0/libgda/gda-data-comparator.h is in libgda-5.0-dev 5.2.4-1ubuntu1.
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* Copyright (C) 2008 Murray Cumming <murrayc@murrayc.com>
* Copyright (C) 2008 - 2011 Vivien Malerba <malerba@gnome-db.org>
*
* 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_COMPARATOR_H_
#define __GDA_DATA_COMPARATOR_H_
#include "gda-decl.h"
#include <glib-object.h>
G_BEGIN_DECLS
#define GDA_TYPE_DATA_COMPARATOR (gda_data_comparator_get_type())
#define GDA_DATA_COMPARATOR(obj) G_TYPE_CHECK_INSTANCE_CAST (obj, gda_data_comparator_get_type(), GdaDataComparator)
#define GDA_DATA_COMPARATOR_CLASS(klass) G_TYPE_CHECK_CLASS_CAST (klass, gda_data_comparator_get_type (), GdaDataComparatorClass)
#define GDA_IS_DATA_COMPARATOR(obj) G_TYPE_CHECK_INSTANCE_TYPE (obj, gda_data_comparator_get_type ())
typedef struct _GdaDataComparator GdaDataComparator;
typedef struct _GdaDataComparatorClass GdaDataComparatorClass;
typedef struct _GdaDataComparatorPrivate GdaDataComparatorPrivate;
/* error reporting */
extern GQuark gda_data_comparator_error_quark (void);
#define GDA_DATA_COMPARATOR_ERROR gda_data_comparator_error_quark ()
typedef enum {
GDA_DATA_COMPARATOR_MISSING_DATA_MODEL_ERROR,
GDA_DATA_COMPARATOR_COLUMN_TYPES_MISMATCH_ERROR,
GDA_DATA_COMPARATOR_MODEL_ACCESS_ERROR,
GDA_DATA_COMPARATOR_USER_CANCELLED_ERROR
} GdaDataComparatorError;
/* differences reporting */
typedef enum {
GDA_DIFF_ADD_ROW,
GDA_DIFF_REMOVE_ROW,
GDA_DIFF_MODIFY_ROW
} GdaDiffType;
typedef struct {
GdaDiffType type;
gint old_row;
gint new_row;
GHashTable *values; /* key = ('+' or '-') and a column position starting at 0 (string)
* value = a GValue pointer */
} GdaDiff;
/* struct for the object's data */
struct _GdaDataComparator
{
GObject object;
GdaDataComparatorPrivate *priv;
};
/* struct for the object's class */
struct _GdaDataComparatorClass
{
GObjectClass parent_class;
gboolean (* diff_computed) (GdaDataComparator *comp, GdaDiff *diff);
/*< private >*/
/* Padding for future expansion */
void (*_gda_reserved1) (void);
void (*_gda_reserved2) (void);
void (*_gda_reserved3) (void);
void (*_gda_reserved4) (void);
};
/**
* SECTION:gda-data-comparator
* @short_description: Simple data model's contents comparison
* @title: GdaDataComparator
* @stability: Stable
* @see_also: #GdaDataModel
*
* The #GdaDataComparator is a simple object which takes two #GdaDataModel objects and compare them.
* Actual comparison is performed when the gda_data_comparator_compute_diff() is called; for each
* difference found, the <link linkend="GdaDataComparator-diff-computed">diff-computed</link> signal
* is emitted (any user installed signal handler which returns FALSE stops the computing process).
*
* There are some limitations to this object:
* <itemizedlist>
* <listitem><para>The data models compared must have the same number and type of columns</para></listitem>
* <listitem><para>The comparison is done column-for-column: one cannot omit columns in the comparison, nor compare
* columns with different positions</para></listitem>
* </itemizedlist>
*/
GType gda_data_comparator_get_type (void) G_GNUC_CONST;
GObject *gda_data_comparator_new (GdaDataModel *old_model, GdaDataModel *new_model);
void gda_data_comparator_set_key_columns (GdaDataComparator *comp, const gint *col_numbers, gint nb_cols);
gboolean gda_data_comparator_compute_diff (GdaDataComparator *comp, GError **error);
gint gda_data_comparator_get_n_diffs (GdaDataComparator *comp);
const GdaDiff *gda_data_comparator_get_diff (GdaDataComparator *comp, gint pos);
G_END_DECLS
#endif
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