/**
* Prepare fetch of rows : initializes
* - $classes
* - $column_count
* - $column_names
*
* @param $data_store List_Data|array[]|object[]|null
*/
private function prepareFetch($data_store)
{
$this->classes = [];
$this->column_count = $this->link->getColumnsCount($this->result_set);
$this->column_names = [];
$this->i_to_j = [];
$classes_index = [];
$j = 0;
for ($i = 0; $i < $this->column_count; $i++) {
$this->column_names[$i] = $column_name = $this->link->getColumnName($this->result_set, $i);
if (strpos($column_name, ':') == false) {
$this->i_to_j[$i] = $j++;
} else {
$split = explode(':', $column_name, 2);
if (!isset($this->path_classes[$split[0]])) {
$this->preparePathClass($split[0]);
}
$this->column_names[$i] = $column_name = $split[1];
$main_property = $split[0];
$his_j = isset($classes_index[$main_property]) ? $classes_index[$main_property] : null;
if (!isset($his_j)) {
$his_j = $j;
$this->classes[$his_j] = $this->path_classes[$main_property];
$classes_index[$main_property] = $j;
$this->i_to_j[$i] = $j++;
} else {
$this->i_to_j[$i] = $his_j;
}
}
if ($data_store instanceof List_Data && substr($column_name, 0, 3) === 'id_') {
$this->column_names[$i] = $column_name = substr($column_name, 3);
}
if (!isset($this->columns[$i])) {
$this->columns[$i] = $column_name;
}
}
}
