NullElement.php

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<?php

declare(strict_types=1);

namespace ILIAS\MetaData\Elements;

use ILIAS\MetaData\Elements\Base\NullBaseElement;
use ILIAS\MetaData\Elements\Data\DataInterface;
use ILIAS\MetaData\Elements\Data\NullData;
use ILIAS\MetaData\Elements\Markers\Action;
use ILIAS\MetaData\Elements\Markers\MarkerFactoryInterface;
use ILIAS\MetaData\Elements\Markers\MarkerInterface;
use ILIAS\MetaData\Elements\Markers\NullMarker;
use ILIAS\MetaData\Manipulator\ScaffoldProvider\ScaffoldProviderInterface;

class NullElement extends NullBaseElement implements ElementInterface
{
    public function isScaffold(): bool
    {
        return false;
    }

    public function getData(): DataInterface
    {
        return new NullData();
    }

    public function isMarked(): bool
    {
        return false;
    }

    public function getMarker(): ?MarkerInterface
    {
        return new NullMarker();
    }

    public function mark(MarkerFactoryInterface $factory, Action $action, string $data_value = ''): void
    {
    }

    public function unmark(): void
    {
    }

    public function addScaffoldsToSubElements(ScaffoldProviderInterface $scaffold_provider): void
    {
    }

    public function addScaffoldToSubElements(ScaffoldProviderInterface $scaffold_provider, string $name): ?ElementInterface
    {
        return null;
    }

    public function getSubElements(): \Generator
    {
        yield from [];
    }

    public function getSuperElement(): ?ElementInterface
    {
        return null;
    }
}