## GdaDataModelBdb

GdaDataModelBdb — GdaDataModel to access Berkeley DB database contents

## Stability Level

Stable, unless otherwise indicated

## Functions

GdaDataModel * | gda_data_model_bdb_new ()
const GSList * | gda_data_model_bdb_get_errors ()
void | gda_data_model_bdb_clean_errors ()

## Types and Values

struct | GdaDataModelBdb
struct | GdaDataModelBdbClass
| GdaDataModelBdbPrivate

## Object Hierarchy

## Description

The GdaDataModelBdb object allows to access the contents of a Berkeley DB database as a GdaDataModel object.

By default the resulting GdaDataModel contains only two columns (named "key" and "data") of type GDA_TYPE_BINARY, but this object can be subclassed to convert the key or data part of a BDB record into several columns (implement the `create_key_columns()`, `create_data_columns()`, `get_key_part()`, and `get_data_part()` virtual methods).

Note: this type of data model is available only if the Berkeley DB library was found at compilation time.

## Functions

### gda_data_model_bdb_new ()

    GdaDataModel *
    gda_data_model_bdb_new (const gchar *filename,
                            const gchar *db_name);

Creates a new GdaDataModel object to access the contents of the Berkeley DB file `file` , for the database `db_name` if not `NULL`

#### Parameters

filename | name of the file containing the database |
db_name | the name of the database within `filename` , or `NULL`. | [allow-none]

#### Returns

a new GdaDataModel.

[transfer full]

### gda_data_model_bdb_get_errors ()

    const GSList *
    gda_data_model_bdb_get_errors (GdaDataModelBdb *model);

Get the list of errors which have occurred while using `model`

#### Parameters

model | a GdaDataModelBdb object |

#### Returns

a read-only list of GError pointers, or `NULL` if no error has occurred.

[element-type GError][transfer none]

### gda_data_model_bdb_clean_errors ()

    void
    gda_data_model_bdb_clean_errors (GdaDataModelBdb *model);

Reset the list of errors which have occurred while using `model`

#### Parameters

model | a GdaDataModelBdb object |

## Types and Values

### struct GdaDataModelBdb

    struct GdaDataModelBdb {
    	GObject                 object;
    	GdaDataModelBdbPrivate *priv;
    };

### struct GdaDataModelBdbClass

    struct GdaDataModelBdbClass {
    	GObjectClass            parent_class;

    	/* virtual methods */
    	GSList                *(*create_key_columns)  (GdaDataModelBdb *model);
    	GSList                *(*create_data_columns) (GdaDataModelBdb *model);
    	GValue                *(*get_key_part)        (GdaDataModelBdb *model,

    						       gpointer data, gint length, gint part);
    	GValue                *(*get_data_part)       (GdaDataModelBdb *model,
    						       gpointer data, gint length, gint part);
    	gboolean               (*update_key_part)     (GdaDataModelBdb *model,
    						       gpointer data, gint length, gint part,
    						       const GValue *value, GError **error);
    	gboolean               (*update_data_part)    (GdaDataModelBdb *model,
    						       gpointer data, gint length, gint part,
    						       const GValue *value, GError **error);
    };

### GdaDataModelBdbPrivate

    typedef struct _GdaDataModelBdbPrivate GdaDataModelBdbPrivate;

## See Also

GdaDataModel