kou commented on code in PR #46774:
URL: https://github.com/apache/arrow/pull/46774#discussion_r2151133802
##########
c_glib/arrow-glib/composite-data-type.cpp:
##########
@@ -767,4 +787,93 @@ garrow_run_end_encoded_data_type_get_value_data_type(
return garrow_data_type_new_raw(&arrow_value_data_type);
}
+enum {
+ PROP_LIST_SIZE = 1
+};
+
+G_DEFINE_TYPE(GArrowFixedSizeListDataType,
+ garrow_fixed_size_list_data_type,
+ GARROW_TYPE_BASE_LIST_DATA_TYPE)
+
+static void
+garrow_fixed_size_list_data_type_get_property(GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ auto arrow_data_type = garrow_data_type_get_raw(GARROW_DATA_TYPE(object));
+ const auto arrow_fixed_size_list_type =
+ std::static_pointer_cast<arrow::FixedSizeListType>(arrow_data_type);
+
+ switch (prop_id) {
+ case PROP_LIST_SIZE:
+ g_value_set_int(value, arrow_fixed_size_list_type->list_size());
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+garrow_fixed_size_list_data_type_class_init(GArrowFixedSizeListDataTypeClass
*klass)
+{
+ GObjectClass *gobject_class;
+ GParamSpec *spec;
+
+ gobject_class = G_OBJECT_CLASS(klass);
+ gobject_class->get_property = garrow_fixed_size_list_data_type_get_property;
+
+ spec = g_param_spec_int("list-size",
+ "List size",
+ "The list size of the elements",
+ G_MININT,
+ G_MAXINT,
+ 0,
+ G_PARAM_READABLE);
+ g_object_class_install_property(gobject_class, PROP_LIST_SIZE, spec);
+}
+
+static void
+garrow_fixed_size_list_data_type_init(GArrowFixedSizeListDataType *object)
+{
+}
+
+/**
+ * garrow_fixed_size_list_data_type_new_data_type:
+ * @value_type: The data type of an element of each list.
+ * @list_size: The size of each list.
+ *
+ * Returns: A newly created fixed size list data type.
+ *
+ * Since: 21.0.0
+ */
+GArrowFixedSizeListDataType *
+garrow_fixed_size_list_data_type_new_data_type(GArrowDataType *value_type,
+ gint32 list_size)
+{
+ auto arrow_value_type = garrow_data_type_get_raw(value_type);
+ auto arrow_fixed_size_list_data_type =
+ arrow::fixed_size_list(arrow_value_type, list_size);
+ return GARROW_FIXED_SIZE_LIST_DATA_TYPE(
+ garrow_data_type_new_raw(&arrow_fixed_size_list_data_type));
+}
+
+/**
+ * garrow_fixed_size_list_data_type_new_field:
+ * @field: The field of an element of each list.
Review Comment:
```suggestion
* @field: The field of lists.
```
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