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java.lang.Objectorg.apache.commons.validator.routines.checkdigit.ModulusCheckDigit
org.apache.commons.validator.routines.checkdigit.ABANumberCheckDigit
public final class ABANumberCheckDigit
Modulus 10 ABA Number (or Routing Transit Number (RTN)) Check Digit calculation/validation.
ABA Numbers (or Routing Transit Numbers) are a nine digit numeric code used to identify American financial institutions for things such as checks or deposits (ABA stands for the American Bankers Association).
Check digit calculation is based on modulus 10 with digits being weighted based on their position (from right to left) as follows:
For further information see Wikipedia - Routing transit number.
Field Summary | |
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static CheckDigit |
ABAN_CHECK_DIGIT
Singleton Routing Transit Number Check Digit instance |
Constructor Summary | |
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ABANumberCheckDigit()
Construct a modulus 10 Check Digit routine for ABA Numbers. |
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.commons.validator.routines.checkdigit.ModulusCheckDigit |
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calculate, calculateModulus, getModulus, isValid, sumDigits, toCheckDigit, toInt |
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 ABAN_CHECK_DIGIT
Constructor Detail |
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public ABANumberCheckDigit()
Method Detail |
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protected int weightedValue(int charValue, int leftPos, int rightPos)
ABA Routing numbers are weighted in the following manner:
left position: 1 2 3 4 5 6 7 8 9
weight: 3 7 1 3 7 1 3 7 1
weightedValue
in class ModulusCheckDigit
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
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