| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.bval.extras.constraints.checkdigit; |
| |
| import static java.lang.Character.getNumericValue; |
| |
| import javax.validation.ConstraintValidator; |
| import javax.validation.ConstraintValidatorContext; |
| |
| /** |
| * <b>IBAN</b> (International Bank Account Number) Check Digit calculation/validation. |
| * <p> |
| * This rountine is based on the ISO 7064 Mod 97,10 check digit caluclation routine. |
| * <p> |
| * The two check digit characters in a IBAN number are the third and fourth characters |
| * in the code. For <i>check digit</i> calculation/validation the first four characters are moved |
| * to the end of the code. |
| * So <code>CCDDnnnnnnn</code> becomes <code>nnnnnnnCCDD</code> (where |
| * <code>CC</code> is the country code and <code>DD</code> is the check digit). For |
| * check digit calcualtion the check digit value should be set to zero (i.e. |
| * <code>CC00nnnnnnn</code> in this example. |
| * <p> |
| * For further information see |
| * <a href="http://en.wikipedia.org/wiki/International_Bank_Account_Number">Wikipedia - |
| * IBAN number</a>. |
| */ |
| public final class IBANValidator |
| implements ConstraintValidator<IBAN, String> { |
| |
| private static final long MAX = 999999999; |
| |
| private static final long MODULUS = 97; |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean isValid(String code, ConstraintValidatorContext context) { |
| if (code.length() < 5) { |
| return false; |
| } |
| |
| String reformattedCode = code.substring(4) + code.substring(0, 4); |
| long total = 0; |
| for (int i = 0; i < reformattedCode.length(); i++) { |
| int charValue = getNumericValue(reformattedCode.charAt(i)); |
| if (charValue < 0 || charValue > 35) { |
| return false; |
| } |
| total = (charValue > 9 ? total * 100 : total * 10) + charValue; |
| if (total > MAX) { |
| total = (total % MODULUS); |
| } |
| } |
| |
| return (total % MODULUS) == 1; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void initialize( IBAN iban ) { |
| // not needed |
| } |
| |
| } |