code: package it.unibz.inf.ontop.model.term.functionsymbol.db.impl;
  
  import com.google.common.collect.ImmutableList;
  import it.unibz.inf.ontop.model.term.ImmutableExpression;
  import it.unibz.inf.ontop.model.term.ImmutableTerm;
  import it.unibz.inf.ontop.model.term.TermFactory;
  import it.unibz.inf.ontop.model.term.functionsymbol.db.DBBooleanFunctionSymbol;
  import it.unibz.inf.ontop.model.term.functionsymbol.db.DBFunctionSymbolSerializer;
  import it.unibz.inf.ontop.model.type.DBTermType;
  import it.unibz.inf.ontop.model.type.TermType;
  
  public class DBBooleanFunctionSymbolWithSerializerImpl extends DBFunctionSymbolWithSerializerImpl
          implements DBBooleanFunctionSymbol {
  
      protected DBBooleanFunctionSymbolWithSerializerImpl(String name, ImmutableList<TermType> inputDBTypes,
                                                          DBTermType dbBooleanType, boolean isAlwaysInjective,
                                                          DBFunctionSymbolSerializer serializer) {
          super(name, inputDBTypes, dbBooleanType, isAlwaysInjective, serializer);
      }
  
      @Override
      public boolean blocksNegation() {
          return true;
      }
  
      @Override
      public ImmutableExpression negate(ImmutableList<? extends ImmutableTerm> subTerms, TermFactory termFactory) {
          throw new UnsupportedOperationException();
      }
  }
  