public function applySubmit(ilTestRandomQuestionSetSourcePoolDefinition $sourcePoolDefinition, $availableTaxonomyIds)
 {
     switch (true) {
         case $this->getItemByPostVar('source_pool_filter_tax') === null:
         case !in_array($this->getItemByPostVar('filter_tax')->getValue(), $availableTaxonomyIds):
             $sourcePoolDefinition->setOriginalFilterTaxId(null);
             $sourcePoolDefinition->setOriginalFilterTaxNodeId(null);
             break;
         default:
             $taxId = $this->getItemByPostVar('filter_tax')->getValue();
             $sourcePoolDefinition->setOriginalFilterTaxId($taxId);
             $sourcePoolDefinition->setOriginalFilterTaxNodeId($this->getItemByPostVar("filter_tax_{$taxId}")->getValue());
     }
     if ($this->questionSetConfig->isQuestionAmountConfigurationModePerPool()) {
         $sourcePoolDefinition->setQuestionAmount($this->getItemByPostVar('question_amount_per_pool')->getValue());
     }
 }