public static Validator createAttributeExpressionLanguageValidator()

in src/main/java/org/apache/nifi/processor/util/StandardValidators.java [718:740]

21 lines of code
4 McCabe index (conditional complexity)


    public static Validator createAttributeExpressionLanguageValidator(final ResultType expectedResultType, final boolean allowExtraCharacters) {
        return new Validator() {
            @Override
            public ValidationResult validate(final String subject, final String input, final ValidationContext context) {
                final String syntaxError = context.newExpressionLanguageCompiler().validateExpression(input, allowExtraCharacters);
                if (syntaxError != null) {
                    return new ValidationResult.Builder().subject(subject).input(input).valid(false).explanation(syntaxError).build();
                }

                final ResultType resultType = allowExtraCharacters ? ResultType.STRING : context.newExpressionLanguageCompiler().getResultType(input);
                if (!resultType.equals(expectedResultType)) {
                    return new ValidationResult.Builder()
                            .subject(subject)
                            .input(input)
                            .valid(false)
                            .explanation("Expected Attribute Query to return type " + expectedResultType + " but query returns type " + resultType)
                            .build();
                }

                return new ValidationResult.Builder().subject(subject).input(input).valid(true).build();
            }
        };
    }