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1
7 package com.ibm.icu.impl;
8
9 import com.ibm.icu.util.VersionInfo;
10
11 public final class ICUDebug {
12 private static String  params;
13 static {
14 try {
15 params = System.getProperty("ICUDebug");
16 }
17 catch (SecurityException e) {
18 }
19 }
20 private static boolean debug = params != null;
21 private static boolean help = debug && (params.equals("") || params.indexOf("help") != -1);
22
23 static {
24 if (debug) {
25 System.out.println("\nICUDebug=" + params);
26 }
27 }
28
29 public static final String javaVersionString = System.getProperty("java.version");
30 public static final boolean isJDK14OrHigher;
31 public static final VersionInfo javaVersion;
32
33 public static VersionInfo getInstanceLenient(String s) {
34
39 char[] chars = s.toCharArray();
40 int r = 0, w = 0, count = 0;
41 boolean numeric = false; while (r < chars.length) {
43 char c = chars[r++];
44 if (c < '0' || c > '9') {
45 if (numeric) {
46 if (count == 3) {
47 break;
49 }
50 numeric = false;
51 chars[w++] = '.';
52 ++count;
53 }
54 } else {
55 numeric = true;
56 chars[w++] = c;
57 }
58 }
59 while (w > 0 && chars[w-1] == '.') {
60 --w;
61 }
62
63 String vs = new String (chars, 0, w);
64
65 return VersionInfo.getInstance(vs);
66 }
67
68 static {
69 javaVersion = getInstanceLenient(javaVersionString);
70
71 VersionInfo java14Version = VersionInfo.getInstance("1.4.0");
72
73 isJDK14OrHigher = javaVersion.compareTo(java14Version) >= 0;
74 }
75
76 public static boolean enabled() {
77 return debug;
78 }
79
80 public static boolean enabled(String arg) {
81 if (debug) {
82 boolean result = params.indexOf(arg) != -1;
83 if (help) System.out.println("\nICUDebug.enabled(" + arg + ") = " + result);
84 return result;
85 }
86 return false;
87 }
88
89 public static String value(String arg) {
90 String result = "false";
91 if (debug) {
92 int index = params.indexOf(arg);
93 if (index != -1) {
94 index += arg.length();
95 if (params.length() > index && params.charAt(index) == '=') {
96 index += 1;
97 int limit = params.indexOf(",", index);
98 result = params.substring(index, limit == -1 ? params.length() : limit);
99 } else {
100 result = "true";
101 }
102 }
103
104 if (help) System.out.println("\nICUDebug.value(" + arg + ") = " + result);
105 }
106 return result;
107 }
108
109 static public void main(String [] args) {
110 String [] tests = {
112 "1.3.0",
113 "1.3.0_02",
114 "1.3.1ea",
115 "1.4.1b43",
116 "___41___5",
117 "x1.4.51xx89ea.7f"
118 };
119 for (int i = 0; i < tests.length; ++i) {
120 System.out.println(tests[i] + " => " + getInstanceLenient(tests[i]));
121 }
122 }
123 }
124 |
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