public function execute()
    {
        $resultPage = $this->createPage();

        $thesaurusId = (int) $this->getRequest()->getParam(ThesaurusInterface::THESAURUS_ID);
        $type        = (string) $this->getRequest()->getParam('type');

        $thesaurus = null;
        $isExistingThesaurus = (bool) $thesaurusId;

        if ($isExistingThesaurus) {
            try {
                $thesaurus = $this->thesaurusRepository->getById($thesaurusId);
                $resultPage->getConfig()->getTitle()->prepend(
                    __('Edit %1 (%2)', $thesaurus->getName(), $thesaurus->getType())
                );
            } catch (NoSuchEntityException $e) {
                $this->messageManager->addException($e, __('Something went wrong while editing the thesaurus.'));
                $resultRedirect = $this->resultRedirectFactory->create();
                $resultRedirect->setPath('*/*/index');

                return $resultRedirect;
            }
        }

        if (!$isExistingThesaurus) {
            $thesaurus = $this->thesaurusFactory->create();
            $thesaurus->setType($type);
            $resultPage->getConfig()->getTitle()->prepend(__('New Thesaurus (%1)', $type));
        }

        $this->coreRegistry->register('current_thesaurus', $thesaurus);
        $resultPage->addBreadcrumb(__('Thesaurus'), __('Thesaurus'));

        return $resultPage;
    }