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java.lang.Objectorg.apache.commons.validator.routines.checkdigit.VerhoeffCheckDigit
public final class VerhoeffCheckDigit
Verhoeff (Dihedral) Check Digit calculation/validation.
Check digit calculation for numeric codes using a Dihedral Group of order 10.
See Wikipedia - Verhoeff algorithm for more details.
Field Summary | |
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static CheckDigit |
INSTANCE
Singleton Verhoeff Check Digit instance |
Constructor Summary | |
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VerhoeffCheckDigit()
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Method Summary | |
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String |
calculate(String code)
Calculate a Verhoeff Check Digit for a code. |
boolean |
isValid(String code)
Validate the Verhoeff Check Digit for a code. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final CheckDigit INSTANCE
Constructor Detail |
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public VerhoeffCheckDigit()
Method Detail |
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public boolean isValid(String code)
isValid
in interface CheckDigit
code
- The code to validate
true
if the check digit is valid,
otherwise false
public String calculate(String code) throws CheckDigitException
calculate
in interface CheckDigit
code
- The code to calculate the Check Digit for
CheckDigitException
- if an error occurs calculating
the check digit for the specified code
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