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GdaDataModelHash — An implementation of GdaDataModel based on a hash table
struct GdaDataModelHash; GdaDataModel* gda_data_model_hash_new (gint cols); const GdaValue* gda_data_model_hash_get_value_at (GdaDataModel *model, gint col, gint row); void gda_data_model_hash_clear (GdaDataModelHash *model); void gda_data_model_hash_set_n_columns (GdaDataModelHash *model, gint cols); void gda_data_model_hash_insert_row (GdaDataModelHash *model, gint rownum, GdaRow *row); const GdaRow* gda_data_model_hash_get_row (GdaDataModel *model, gint row);
Unlike GdaDataModelArray, this data model implementation stores the GdaRow in a hash table. So it only retrieves from the database backend exactly the requested rows (while in GdaDataModelArray you have to retrieve all the rows until the one requested).
struct GdaDataModelHash { GdaDataModel model; GdaDataModelHashPrivate *priv; };
GdaDataModel* gda_data_model_hash_new (gint cols);
cols : | number of columns for rows in this data model. |
Returns : | a pointer to the newly created GdaDataModel. |
const GdaValue* gda_data_model_hash_get_value_at (GdaDataModel *model, gint col, gint row);
model : | |
col : | |
row : | |
Returns : |
void gda_data_model_hash_clear (GdaDataModelHash *model);
Frees all the rows inserted in model.
model : | the model to clear. |
void gda_data_model_hash_set_n_columns (GdaDataModelHash *model, gint cols);
Sets the number of columns for rows inserted in this model. cols must be greater than or equal to 0.
This function calls gda_data_model_hash_clear to free the existing rows if any.
model : | the GdaDataModelHash. |
cols : | the number of columns for rows inserted in model. |
void gda_data_model_hash_insert_row (GdaDataModelHash *model, gint rownum, GdaRow *row);
Inserts a row in the model.
model : | the GdaDataModelHash which is gonna hold the row. |
rownum : | the number of the row. |
row : | the row to insert. The model is responsible of freeing it! |
const GdaRow* gda_data_model_hash_get_row (GdaDataModel *model, gint row);
model : | |
row : | |
Returns : |
<< GdaDataModelArray | GdaDataModelList >> |