| CreditCard.java |
1 /**
2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3 *
4 *
5 *
6 *
7 * The contents of this file are subject to the terms of the Liferay Enterprise
8 * Subscription License ("License"). You may not use this file except in
9 * compliance with the License. You can obtain a copy of the License by
10 * contacting Liferay, Inc. See the License for the specific language governing
11 * permissions and limitations under the License, including but not limited to
12 * distribution rights of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23 package com.liferay.util;
24
25 import com.liferay.portal.kernel.util.StringPool;
26 import com.liferay.portal.kernel.util.StringUtil;
27 import com.liferay.portal.kernel.util.Validator;
28
29 /**
30 * <a href="CreditCard.java.html"><b><i>View Source</i></b></a>
31 *
32 * @author Brian Wing Shun Chan
33 */
34 public class CreditCard {
35
36 public static String hide(String number) {
37 return hide(number, StringPool.STAR);
38 }
39
40 public static String hide(String number, String x) {
41 if (number == null) {
42 return number;
43 }
44
45 int numberLen = number.length();
46
47 if (numberLen > 4) {
48 StringBuilder sb = new StringBuilder();
49
50 for (int i = 0; i < numberLen - 4; i++) {
51 sb.append(x);
52 }
53
54 sb.append(number.substring(numberLen - 4, numberLen));
55
56 number = sb.toString();
57 }
58
59 return number;
60 }
61
62 public static boolean isValid(String number, String type) {
63 number = StringUtil.extractDigits(number);
64
65 if (type.equals("visa")) {
66 if (!number.startsWith("4")) {
67 return false;
68 }
69
70 if (number.length() != 13 &&
71 number.length() != 16) {
72
73 return false;
74 }
75 }
76 else if (type.equals("mastercard")) {
77 if (!number.startsWith("51") &&
78 !number.startsWith("52") &&
79 !number.startsWith("53") &&
80 !number.startsWith("54") &&
81 !number.startsWith("55")) {
82
83 return false;
84 }
85
86 if (number.length() != 16) {
87 return false;
88 }
89 }
90 else if (type.equals("discover")) {
91 if (!number.startsWith("6011")) {
92
93 return false;
94 }
95
96 if (number.length() != 16) {
97 return false;
98 }
99 }
100 else if (type.equals("amex")) {
101 if (!number.startsWith("34") &&
102 !number.startsWith("35") &&
103 !number.startsWith("36") &&
104 !number.startsWith("37")) {
105
106 return false;
107 }
108
109 if (number.length() != 15) {
110 return false;
111 }
112 }
113
114 return Validator.isLUHN(number);
115 }
116
117 }