code: package it.unibz.inf.ontop.spec.fact.impl;
  
  import com.google.inject.Inject;
  import com.google.inject.Singleton;
  import it.unibz.inf.ontop.injection.OntopMappingSettings;
  import it.unibz.inf.ontop.spec.ontology.ClassifiedTBox;
  import it.unibz.inf.ontop.spec.ontology.RDFFact;
  
  import java.util.stream.Stream;
  
  /**
   * Does not extract any T-box axioms
   */
  @Singleton
  public class NoTBoxFactExtractor extends AbstractFactExtractor {
  
      @Inject
      protected NoTBoxFactExtractor(OntopMappingSettings settings) {
          super(settings);
      }
  
      @Override
      protected Stream<RDFFact> extractTBox(ClassifiedTBox tbox) {
          return Stream.empty();
      }
  }
  