org.hibernate.validator.internal.constraintvalidators.hv.Mod10CheckValidator Maven / Gradle / Ivy
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JSR 380's RI, Hibernate Validator version ${hibernate-validator.version} and its dependencies repackaged as OSGi bundle
/*
* Hibernate Validator, declare and validate application constraints
*
* License: Apache License, Version 2.0
* See the license.txt file in the root directory or .
*/
package org.hibernate.validator.internal.constraintvalidators.hv;
import java.lang.invoke.MethodHandles;
import java.util.List;
import javax.validation.ConstraintValidator;
import org.hibernate.validator.constraints.Mod10Check;
import org.hibernate.validator.internal.util.ModUtil;
import org.hibernate.validator.internal.util.logging.Log;
import org.hibernate.validator.internal.util.logging.LoggerFactory;
/**
* Mod10 (Luhn algorithm implementation) Check validator
*
* http://en.wikipedia.org/wiki/Luhn_algorithm
* http://en.wikipedia.org/wiki/Check_digit
*
* @author George Gastaldi
* @author Hardy Ferentschik
* @author Victor Rezende dos Santos
*/
public class Mod10CheckValidator extends ModCheckBase
implements ConstraintValidator {
private static final Log LOG = LoggerFactory.make( MethodHandles.lookup() );
/**
* Multiplier to be used by odd digits on Mod10 algorithm
*/
private int multiplier;
/**
* Weight to be used by even digits on Mod10 algorithm
*/
private int weight;
@Override
public void initialize(Mod10Check constraintAnnotation) {
super.initialize(
constraintAnnotation.startIndex(),
constraintAnnotation.endIndex(),
constraintAnnotation.checkDigitIndex(),
constraintAnnotation.ignoreNonDigitCharacters()
);
this.multiplier = constraintAnnotation.multiplier();
this.weight = constraintAnnotation.weight();
if ( this.multiplier < 0 ) {
throw LOG.getMultiplierCannotBeNegativeException( this.multiplier );
}
if ( this.weight < 0 ) {
throw LOG.getWeightCannotBeNegativeException( this.weight );
}
}
/**
* Validate check digit using Mod10
*
* @param digits The digits over which to calculate the checksum
* @param checkDigit the check digit
*
* @return {@code true} if the mod 10 result matches the check digit, {@code false} otherwise
*/
@Override
public boolean isCheckDigitValid(List digits, char checkDigit) {
int modResult = ModUtil.calculateMod10Check( digits, this.multiplier, this.weight );
if ( !Character.isDigit( checkDigit ) ) {
return false;
}
int checkValue = extractDigit( checkDigit );
return checkValue == modResult;
}
}