/**
* Generate the filter objects corresponding to a UQL string.
*
* @param $UQLStringInput
*
* @return Filter
*/
public function generateFilters($UQLStringInput)
{
if (empty(trim($UQLStringInput))) {
return new Filter();
}
// Get the Abstract Syntax Tree of the input from the parser
$parser = new Parser();
$AST = $parser->parse($UQLStringInput);
// Recursively translate into filters.
$filters = $this->buildFilterLevel($AST);
if ($filters instanceof FilterCondition) {
// Single filter. Wrap into dummy filter collection for consistency.
$filterDefinition = new Filter();
$filterDefinition[] = $filters;
$filters = $filterDefinition;
}
return $filters;
}
