01: /*
02: * (c) Copyright 2007 by Volker Bergmann. All rights reserved.
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, is permitted under the terms of the
06: * GNU General Public License.
07: *
08: * For redistributing this software or a derivative work under a license other
09: * 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 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 org.databene.domain.product;
28:
29: import org.databene.benerator.GeneratorWrapper;
30: import org.databene.benerator.factory.GeneratorFactory;
31:
32: /**
33: * Generates 8-digit EAN codes.<br/>
34: * <br/>
35: * Created: 30.07.2007 21:47:30
36: */
37: public class EAN8Generator extends GeneratorWrapper<String, String> {
38:
39: private boolean unique;
40:
41: public EAN8Generator() {
42: this (false);
43: }
44:
45: public EAN8Generator(boolean unique) {
46: super (null);
47: setUnique(unique);
48: }
49:
50: public boolean isUnique() {
51: return unique;
52: }
53:
54: private void setUnique(boolean unique) {
55: this .unique = unique;
56: if (unique)
57: setSource(GeneratorFactory.getUniqueRegexStringGenerator(
58: "[0-9]{7}", 7, 7, null));
59: else
60: setSource(GeneratorFactory.getRegexStringGenerator(
61: "[0-9]{7}", 7, 7, null, 0));
62: }
63:
64: // Generator interface --------------------------------------------------------------------
65:
66: public Class<String> getGeneratedType() {
67: return String.class;
68: }
69:
70: public String generate() {
71: char[] chars = new char[8];
72: source.generate().getChars(0, 7, chars, 0);
73: chars[7] = chars[6];
74: chars[6] = '0';
75: int sum = 0;
76: for (int i = 0; i < 8; i++)
77: sum += (chars[i] - '0') * (1 + (i % 2) * 2);
78: if (sum % 10 == 0)
79: chars[6] = '0';
80: else
81: chars[6] = (char) ('0' + 10 - (sum % 10));
82: return new String(chars);
83: }
84:
85: // java.lang.Object overrides --------------------------------------------------------------------------------------
86:
87: public String toString() {
88: return getClass().getSimpleName() + (unique ? "[unique]" : "");
89: }
90:
91: }
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