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<?php
namespace Psi\Component\ObjectAgent;
final class Capabilities
{
private $supportedComparators;
private $setParent;
private $queryCount;
private function __construct()
// this class cannot be instantiated with "new".
}
public static function create(array $capabilities): Capabilities
$defaults = [
'supported_comparators' => [],
'can_set_parent' => false,
'can_query_count' => false,
];
if ($diff = array_diff(array_keys($capabilities), array_keys($defaults))) {
throw new \InvalidArgumentException(sprintf(
'Unknown capabilities: "%s". Valid capabilities: "%s"',
implode('", "', $diff), implode('", "', array_keys($defaults))
));
$capabilities = array_merge($defaults, $capabilities);
$instance = new self();
$instance->supportedComparators = (array) $capabilities['supported_comparators'];
$instance->setParent = (bool) $capabilities['can_set_parent'];
$instance->queryCount = (bool) $capabilities['can_query_count'];
return $instance;
public function getSupportedComparators(): array
return $this->supportedComparators;
public function canSetParent(): bool
return $this->setParent;
public function canQueryCount(): bool
return $this->queryCount;
psiphp /
object-agent
