private Optional renderUnaryOperator()

in flink-connector-jdbc-core/src/main/java/org/apache/flink/connector/jdbc/core/table/source/JdbcFilterPushdownPreparedStatementVisitor.java [105:126]

22 lines of code
3 McCabe index (conditional complexity)


    private Optional<ParameterizedPredicate> renderUnaryOperator(
            String operator, ResolvedExpression operand, boolean operandOnLeft) {
        if (operand instanceof FieldReferenceExpression) {
            Optional<ParameterizedPredicate> fieldPartialPredicate =
                    this.visit((FieldReferenceExpression) operand);
            if (operandOnLeft) {
                return fieldPartialPredicate.map(
                        fieldPred ->
                                new ParameterizedPredicate(
                                        String.format(
                                                "(%s %s)", fieldPred.getPredicate(), operator)));
            } else {
                return fieldPartialPredicate.map(
                        fieldPred ->
                                new ParameterizedPredicate(
                                        String.format(
                                                "(%s %s)", operator, fieldPred.getPredicate())));
            }
        } else {
            return Optional.empty();
        }
    }