1 /*
2 * (c) Copyright 2006-2020 by rapiddweller GmbH & Volker Bergmann. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, is permitted under the terms of the
6 * GNU General Public License.
7 *
8 * For redistributing this software or a derivative work under a license other
9 * than the GPL-compatible Free Software License as defined by the Free
10 * Software Foundation or approved by OSI, you must first obtain a commercial
11 * license to this software product from rapiddweller GmbH & Volker Bergmann.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
14 * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
15 * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
17 * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
18 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 package com.rapiddweller.domain.product;
28
29 import com.rapiddweller.common.validator.bean.AbstractConstraintValidator;
30
31 import javax.validation.ConstraintValidatorContext;
32
33 /**
34 * Validates an 8- or 13-digit EAN code.<br/>
35 * <br/>
36 * Created: 29.07.2007 07:59:58
37 *
38 * @author Volker Bergmann
39 */
40 public class EANValidator extends AbstractConstraintValidator<EAN8, String> {
41
42 @Override
43 public boolean isValid(String number, ConstraintValidatorContext context) {
44 if (number == null || (number.length() != 8 && number.length() != 13)) {
45 return false;
46 }
47 int sum = 0;
48 for (int i = 0; i < number.length(); i++) {
49 char c = number.charAt(i);
50 if (!Character.isDigit(c)) {
51 return false;
52 }
53 sum += (c - '0') * (1 + (i % 2) * 2);
54 }
55 return (sum % 10 == 0);
56 }
57
58 }