1
22
23 package com.liferay.util;
24
25 import com.liferay.portal.kernel.util.StringMaker;
26 import com.liferay.portal.kernel.util.StringPool;
27 import com.liferay.portal.kernel.util.StringUtil;
28 import com.liferay.portal.kernel.util.Validator;
29
30
36 public class CreditCard {
37
38 public static String hide(String number) {
39 return hide(number, StringPool.STAR);
40 }
41
42 public static String hide(String number, String x) {
43 if (number == null) {
44 return number;
45 }
46
47 int numberLen = number.length();
48
49 if (numberLen > 4) {
50 StringMaker sm = new StringMaker();
51
52 for (int i = 0; i < numberLen - 4; i++) {
53 sm.append(x);
54 }
55
56 sm.append(number.substring(numberLen - 4, numberLen));
57
58 number = sm.toString();
59 }
60
61 return number;
62 }
63
64 public static boolean isValid(String number, String type) {
65 number = StringUtil.extractDigits(number);
66
67 if (type.equals("visa")) {
68 if (!number.startsWith("4")) {
69 return false;
70 }
71
72 if (number.length() != 13 &&
73 number.length() != 16) {
74
75 return false;
76 }
77 }
78 else if (type.equals("mastercard")) {
79 if (!number.startsWith("51") &&
80 !number.startsWith("52") &&
81 !number.startsWith("53") &&
82 !number.startsWith("54") &&
83 !number.startsWith("55")) {
84
85 return false;
86 }
87
88 if (number.length() != 16) {
89 return false;
90 }
91 }
92 else if (type.equals("discover")) {
93 if (!number.startsWith("6011")) {
94
95 return false;
96 }
97
98 if (number.length() != 16) {
99 return false;
100 }
101 }
102 else if (type.equals("amex")) {
103 if (!number.startsWith("34") &&
104 !number.startsWith("35") &&
105 !number.startsWith("36") &&
106 !number.startsWith("37")) {
107
108 return false;
109 }
110
111 if (number.length() != 15) {
112 return false;
113 }
114 }
115
116 return Validator.isLUHN(number);
117 }
118
119 }