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