CoreIdentificationProvider.php

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<?php

declare(strict_types=1);
namespace ILIAS\GlobalScreen\Identification;

class CoreIdentificationProvider extends AbstractIdentificationProvider implements IdentificationProviderInterface
{
    public function identifier(string $identifier_string): IdentificationInterface
    {
        if (isset(self::$instances[$identifier_string])) {
            return self::$instances[$identifier_string];
        }

        $core_identification = new CoreIdentification(
            $identifier_string,
            $this->class_name,
            $this->serializer,
            $this->provider->getProviderNameForPresentation()
        );
        $this->map->addToMap($core_identification);

        return self::$instances[$identifier_string] = $core_identification;
    }
}