EAN13Validator (Apache BVal :: Extras 3.0.1 API)

java.lang.Object
- org.apache.bval.extras.constraints.checkdigit.ModulusValidator<EAN13>
- - org.apache.bval.extras.constraints.checkdigit.EAN13Validator

All Implemented Interfaces:

jakarta.validation.ConstraintValidator<EAN13,CharSequence>
```
public final class EAN13Validator
extends ModulusValidator<EAN13>
```
Modulus 10 EAN-13 / UPC / ISBN-13 Check Digit calculation/validation.
Check digit calculation is based on modulus 10 with digits in an odd position (from right to left) being weighted 1 and even position digits being weighted 3.
For further information see:
- EAN-13 - see Wikipedia - European Article Number.
- UPC - see Wikipedia - Universal Product Code.
- ISBN-13 - see Wikipedia - International Standard Book Number (ISBN).

Constructor Summary

Constructors
Constructor Description

EAN13Validator()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected int`	`weightedValue(int charValue, int leftPos, int rightPos)`	Calculates the weighted value of a character in the code at a specified position.

Methods inherited from class org.apache.bval.extras.constraints.checkdigit.ModulusValidator
initialize, isValid, sumDigits, toInt

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

- Constructor Detail
  - EAN13Validator
```
public EAN13Validator()
```
- Method Detail
  - weightedValue
```
protected int weightedValue(int charValue,
                            int leftPos,
                            int rightPos)
                     throws Exception
```
    Calculates the weighted value of a character in the code at a specified position.
    
    For EAN-13 (from right to left) odd digits are weighted with a factor of one and even digits with a factor of three.
    Calculates the weighted value of a character in the code at a specified position.
    Some modulus routines weight the value of a character depending on its position in the code (e.g. ISBN-10), while others use different weighting factors for odd/even positions (e.g. EAN or Luhn). Implement the appropriate mechanism required by overriding this method.
    
    Specified by:
    
    weightedValue in class ModulusValidator<EAN13>
    
    Parameters:
    
    charValue - The numeric value of the character
    
    leftPos - The position of the character in the code, counting from left to right
    
    rightPos - The position of the character in the code, counting from right to left
    
    Returns:
    
    The weighted value of the character
    
    Throws:
    
    Exception