Class EAN13CheckDigit
- java.lang.Object
-
- org.apache.commons.validator.routines.checkdigit.ModulusCheckDigit
-
- org.apache.commons.validator.routines.checkdigit.EAN13CheckDigit
-
- All Implemented Interfaces:
java.io.Serializable
,CheckDigit
public final class EAN13CheckDigit extends ModulusCheckDigit
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).
- Since:
- Validator 1.4
- Version:
- $Revision: 1739356 $
- See Also:
- Serialized Form
-
-
Field Summary
Fields Modifier and Type Field Description static CheckDigit
EAN13_CHECK_DIGIT
Singleton EAN-13 Check Digit instance
-
Constructor Summary
Constructors Constructor Description EAN13CheckDigit()
Construct a modulus 10 Check Digit routine for EAN/UPC.
-
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.commons.validator.routines.checkdigit.ModulusCheckDigit
calculate, calculateModulus, getModulus, isValid, sumDigits, toCheckDigit, toInt
-
-
-
-
Field Detail
-
EAN13_CHECK_DIGIT
public static final CheckDigit EAN13_CHECK_DIGIT
Singleton EAN-13 Check Digit instance
-
-
Method Detail
-
weightedValue
protected int weightedValue(int charValue, int leftPos, int rightPos)
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.
- Specified by:
weightedValue
in classModulusCheckDigit
- Parameters:
charValue
- The numeric value of the character.leftPos
- The position of the character in the code, counting from left to rightrightPos
- The positionof the character in the code, counting from right to left- Returns:
- The weighted value of the character.
-
-