org.apache.wicket.validation.validator
Class CreditCardValidator

java.lang.Object
  org.apache.wicket.validation.validator.CreditCardValidator

All Implemented Interfaces:

Serializable, IClusterable, IValidator<String>

public class CreditCardValidator
extends Object
implements IValidator<String>

Checks if a credit card number is valid. The number will be checked for "American Express", "China UnionPay", "Diners Club Carte Blanche", "Diners Club International", "Diners Club US & Canada", "Discover Card", "JCB", "Laser", "Maestro", "MasterCard", "Solo", "Switch", "Visa" and "Visa Electron". If none of those apply to the credit card number, the credit card number is considered invalid.

Card prefixes and lengths have been taken from Wikipedia.

Since:

1.2.6

Author:

Johan Compagner, Joachim F. Rohde

See Also:

Serialized Form

Nested Class Summary

static class

CreditCardValidator.CreditCard

Constructor Summary

CreditCardValidator()
Construct.

CreditCardValidator(boolean failOnUnkown)
Construct.

Method Summary

protected ValidationError	decorate(ValidationError error, IValidatable<String> validatable) Allows subclasses to decorate reported errors
CreditCardValidator.CreditCard	determineCardId(String creditCardNumber) Checks if the credit card number can be determined as a valid number.
CreditCardValidator.CreditCard	getCardId()
protected boolean	isChecksumCorrect(String creditCardNumber) Calculates the checksum of a credit card number using the Luhn algorithm (the so-called "mod 10" algorithm).
protected boolean	isLengthAndPrefixCorrect(String creditCardNumber) Checks if the credit card number can be determined as a valid number.
protected CreditCardValidator.CreditCard	isUnknown(String creditCardNumber) Can be used (subclassed) to extend the test with a credit card not yet known by the validator.
protected void	setCardId(CreditCardValidator.CreditCard cardId) Allow subclasses to set the card id
void	validate(IValidatable<String> validatable) Validates the IValidatable instance.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CreditCardValidator

public CreditCardValidator()

Construct.

CreditCardValidator

public CreditCardValidator(boolean failOnUnkown)

Construct.

Parameters:

failOnUnkown -

Method Detail

getCardId

public final CreditCardValidator.CreditCard getCardId()

Returns:

Credit card issuer

setCardId

protected void setCardId(CreditCardValidator.CreditCard cardId)

Allow subclasses to set the card id

Parameters:

cardId -

validate

public void validate(IValidatable<String> validatable)

Description copied from interface: IValidator

Validates the IValidatable instance. Validation errors should be reported using the IValidatable.error(IValidationError) method.

Specified by:

validate in interface IValidator<String>

Parameters:

validatable - the IValidatable instance being validated

decorate

protected ValidationError decorate(ValidationError error,
                                   IValidatable<String> validatable)

Allows subclasses to decorate reported errors

Parameters:

error -

validatable -

Returns:

decorated error

isLengthAndPrefixCorrect

protected boolean isLengthAndPrefixCorrect(String creditCardNumber)

Checks if the credit card number can be determined as a valid number.

Parameters:

creditCardNumber - the credit card number as a string

Returns:

TRUE if the credit card number could be determined as a valid number, else FALSE is returned

determineCardId

public final CreditCardValidator.CreditCard determineCardId(String creditCardNumber)

Checks if the credit card number can be determined as a valid number.

Parameters:

creditCardNumber - the credit card number as a string

Returns:

TRUE if the credit card number could be determined as a valid number, else FALSE is returned

isUnknown

protected CreditCardValidator.CreditCard isUnknown(String creditCardNumber)

Can be used (subclassed) to extend the test with a credit card not yet known by the validator.

Parameters:

creditCardNumber - the credit card number as a string

Returns:

The credit card id of the issuer

isChecksumCorrect

protected final boolean isChecksumCorrect(String creditCardNumber)

Calculates the checksum of a credit card number using the Luhn algorithm (the so-called "mod 10" algorithm).

Parameters:

creditCardNumber - the credit card number for which the checksum should be calculated

Returns:

TRUE if the checksum for the given credit card number is valid, else return FALSE

See Also:

Wikipedie - Luhn algorithm