## GdaDataModelArray

GdaDataModelArray — An implementation of GdaDataModel based on a GArray

## Stability Level

Stable, unless otherwise indicated

## Synopsis

    struct              GdaDataModelArray;
    struct              GdaDataModelArrayClass;
                        GdaDataModelArrayPrivate;
    GdaDataModel *      gda_data_model_array_new            (gint cols);
    GdaDataModel *      gda_data_model_array_new_with_g_types
                                                            (gint cols,
                                                             ...);
    GdaDataModel *      gda_data_model_array_new_with_g_types_v
                                                            (gint cols,
                                                             GType *types);
    GdaDataModelArray * gda_data_model_array_copy_model     (GdaDataModel *src,
                                                             GError **error);
    GdaDataModelArray * gda_data_model_array_copy_model_ext (GdaDataModel *src,
                                                             gint ncols,
                                                             gint *cols,
                                                             GError **error);
    GdaRow *            gda_data_model_array_get_row        (GdaDataModelArray *model,
                                                             gint row,
                                                             GError **error);
    void                gda_data_model_array_set_n_columns  (GdaDataModelArray *model,
                                                             gint cols);
    void                gda_data_model_array_clear          (GdaDataModelArray *model);

## Object Hierarchy

      GObject
       +----GdaDataModelArray

## Implemented Interfaces

GdaDataModelArray implements GdaDataModel.

## Properties

      "n-columns"                guint                 : Read / Write
      "read-only"                gboolean              : Read / Write

## Description

The GdaDataModelArray object is a data model which internally uses a GArray to index all its rows (represented as GdaRow objects). In this data model, all the data is stored in memory, which can be a memory limitation if the number of rows is huge. This type of data model is easy to use to store some temporary data, and has a random access mode (any value can be accessed at any time without the need for an iterator).

## Details

### struct GdaDataModelArray

    struct GdaDataModelArray;

### struct GdaDataModelArrayClass

    struct GdaDataModelArrayClass {
    	GObjectClass              parent_class;
    };

### GdaDataModelArrayPrivate

    typedef struct _GdaDataModelArrayPrivate GdaDataModelArrayPrivate;

### gda_data_model_array_new ()

    GdaDataModel *      gda_data_model_array_new            (gint cols);

Creates a new GdaDataModel object without initializing the column types. Using `gda_data_model_array_new_with_g_types()` is usually better.

`cols` : | number of columns for rows in this data model.
Returns : | a pointer to the newly created GdaDataModel. [transfer full]

### gda_data_model_array_new_with_g_types ()

    GdaDataModel *      gda_data_model_array_new_with_g_types
                                                            (gint cols,
                                                             ...);

Creates a new GdaDataModel object with the column types as specified.

`cols` : | number of columns for rows in this data model.
`...` : | types of the columns of the model to create as GType, as many as indicated by `cols`
Returns : | a pointer to the newly created GdaDataModel. [transfer full]

### gda_data_model_array_new_with_g_types_v ()

    GdaDataModel *      gda_data_model_array_new_with_g_types_v
                                                            (gint cols,
                                                             GType *types);

Creates a new GdaDataModel object with the column types as specified.

`cols` : | number of columns for rows in this data model.
`types` : | array of types of the columns of the model to create as GType, as many as indicated by `cols`. [array]
Returns : | a pointer to the newly created GdaDataModel. [transfer full]

Since 4.2.6

### gda_data_model_array_copy_model ()

    GdaDataModelArray * gda_data_model_array_copy_model     (GdaDataModel *src,
                                                             GError **error);

Makes a copy of `src` into a new GdaDataModelArray object

`src` : | a GdaDataModel to copy data from
`error` : | a place to store errors, or `NULL`
Returns : | a new data model, or `NULL` if an error occurred. [transfer full][allow-none]

### gda_data_model_array_copy_model_ext ()

    GdaDataModelArray * gda_data_model_array_copy_model_ext (GdaDataModel *src,
                                                             gint ncols,
                                                             gint *cols,
                                                             GError **error);

Like `gda_data_model_array_copy_model()`, makes a copy of `src`, but copies only some columns.

`src` : | a GdaDataModel to copy data from
`ncols` : | size of `cols`
`cols` : | array of `src`'s columns to copy into the new array, not `NULL`. [array length=ncols]
`error` : | a place to store errors, or `NULL`
Returns : | a new data model, or `NULL` if an error occurred. [transfer full][allow-none]

Since 5.2.0

### gda_data_model_array_get_row ()

    GdaRow *            gda_data_model_array_get_row        (GdaDataModelArray *model,
                                                             gint row,
                                                             GError **error);

Get a pointer to a row in `model`

`model` : | a GdaDataModelArray object
`row` : | row number (starting from 0)
`error` : | a place to store errors, or `NULL`
Returns : | the GdaRow, or `NULL` if an error occurred. [transfer none]

### gda_data_model_array_set_n_columns ()

    void                gda_data_model_array_set_n_columns  (GdaDataModelArray *model,
                                                             gint cols);

Sets the number of columns for rows inserted in this model. `cols` must be greated than or equal to 0.

Also clears `model`'s contents.

`model` : | the GdaDataModelArray.
`cols` : | number of columns for rows this data model should use.

### gda_data_model_array_clear ()

    void                gda_data_model_array_clear          (GdaDataModelArray *model);

Frees all the rows in `model`.

`model` : | the model to clear.

## Property Details

### The `"n-columns"` property

      "n-columns"                guint                 : Read / Write

The number of columns in the model.

Default value: 0

### The `"read-only"` property

      "read-only"                gboolean              : Read / Write

Whether data model can be modified.

Default value: FALSE

## See Also

GdaDataModel