BaseSet.php

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<?php

declare(strict_types=1);

namespace ILIAS\MetaData\Elements\Base;

abstract class BaseSet implements BaseSetInterface
{
    private BaseElementInterface $root;

    public function __construct(BaseElementInterface $root)
    {
        if (!$root->isRoot() || $root->getSuperElement()) {
            throw new \ilMDElementsException(
                'Metadata sets must be created from a root element.'
            );
        }
        $this->root = $root;
    }

    public function __clone()
    {
        $this->root = clone $this->root;
    }

    public function getRoot(): BaseElementInterface
    {
        return $this->root;
    }
}