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java.lang.Objectorg.apache.bval.extras.constraints.checkdigit.ModulusValidator<EAN13>
org.apache.bval.extras.constraints.checkdigit.EAN13Validator
public final class EAN13Validator
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:
Constructor Summary | |
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EAN13Validator()
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Method Summary | |
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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 |
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initialize, isValid, sumDigits, toInt |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public EAN13Validator()
Method Detail |
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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.
weightedValue
in class ModulusValidator<EAN13>
charValue
- The numeric value of the characterleftPos
- The position of the character in the code, counting from left to rightrightPos
- The position of the character in the code, counting from right to left
Exception
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