LuhnCheckValidator (Red Hat JBoss Enterprise Application Platform 8.0.0.GA public API)

java.lang.Object
- org.hibernate.validator.internal.constraintvalidators.hv.ModCheckBase
- - org.hibernate.validator.internal.constraintvalidators.hv.LuhnCheckValidator

All Implemented Interfaces:

ConstraintValidator<LuhnCheck,CharSequence>
```
public class LuhnCheckValidator
extends ModCheckBase
implements ConstraintValidator<LuhnCheck,CharSequence>
```
Luhn algorithm checksum validator http://en.wikipedia.org/wiki/Luhn_algorithm http://en.wikipedia.org/wiki/Check_digit

Author:

George Gastaldi, Hardy Ferentschik, Victor Rezende dos Santos

Constructor Summary

Constructors
Constructor Description

LuhnCheckValidator()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`initialize(LuhnCheck constraintAnnotation)`	Initializes the validator in preparation for `ConstraintValidator.isValid(Object, ConstraintValidatorContext)` calls.
`boolean`	`isCheckDigitValid(List<Integer> digits, char checkDigit)`	Validate check digit using Luhn algorithm

Methods inherited from class org.hibernate.validator.internal.constraintvalidators.hv.ModCheckBase
extractDigit, initialize, isValid

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface jakarta.validation.ConstraintValidator
isValid

- Constructor Detail
  - LuhnCheckValidator
```
public LuhnCheckValidator()
```
- Method Detail
  - initialize
```
public void initialize(LuhnCheck constraintAnnotation)
```
    Description copied from interface: ConstraintValidator
    
    Initializes the validator in preparation for ConstraintValidator.isValid(Object, ConstraintValidatorContext) calls. The constraint annotation for a given constraint declaration is passed.
    This method is guaranteed to be called before any use of this instance for validation.
    The default implementation is a no-op.
    
    Specified by:
    
    initialize in interface ConstraintValidator<LuhnCheck,CharSequence>
    
    Parameters:
    
    constraintAnnotation - annotation instance for a given constraint declaration
  - isCheckDigitValid
```
public boolean isCheckDigitValid(List<Integer> digits,
                                 char checkDigit)
```
    Validate check digit using Luhn algorithm
    
    Specified by:
    
    isCheckDigitValid in class ModCheckBase
    
    Parameters:
    
    digits - The digits over which to calculate the checksum
    
    checkDigit - the check digit
    
    Returns:
    
    true if the luhn check result matches the check digit, false otherwise