public static Validator createNonNegativeFloatingPointValidator()

in src/main/java/org/apache/nifi/processor/util/StandardValidators.java [766:792]

• 24 lines of code
• 6 McCabe index (conditional complexity)

    public static Validator createNonNegativeFloatingPointValidator(final double maximum) {
        return new Validator() {
            @Override
            public ValidationResult validate(final String subject, final String input, final ValidationContext context) {
                if (context.isExpressionLanguageSupported(subject) && context.isExpressionLanguagePresent(input)) {
                    return new ValidationResult.Builder().subject(subject).input(input).explanation("Expression Language Present").valid(true).build();
                }

                String reason = null;
                try {
                    final double doubleValue = Double.parseDouble(input);
                    if (doubleValue < 0) {
                        reason = "Value must be non-negative but was " + doubleValue;
                    }
                    final double maxPlusDelta = maximum + 0.00001D;
                    if (doubleValue < 0 || doubleValue > maxPlusDelta) {
                        reason = "Value must be between 0 and " + maximum + " but was " + doubleValue;
                    }
                } catch (final NumberFormatException e) {
                    reason = "not a valid integer";
                }

                return new ValidationResult.Builder().subject(subject).input(input).explanation(reason).valid(reason == null).build();
            }

        };
    }