jars/icu4j-52_1/main/classes/core/src/com/ibm/icu/impl/ICUDebug.java

   1 /**
   2  *******************************************************************************
   3  * Copyright (C) 2001-2010, International Business Machines Corporation and    *
   4  * others. All Rights Reserved.                                                *
   5  *******************************************************************************
   6  */
   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", "0");
  30     public static final boolean isJDK14OrHigher;
  31     public static final VersionInfo javaVersion;
  32
  33     public static VersionInfo getInstanceLenient(String s) {
  34         // Extracting ASCII numbers up to 4 delimited by
  35         // any non digit characters
  36         int[] ver = new int[4];
  37         boolean numeric = false;
  38         int i = 0, vidx = 0;
  39         while (i < s.length()) {
  40             char c = s.charAt(i++);
  41             if (c < '0' || c > '9') {
  42                 if (numeric) {
  43                     if (vidx == 3) {
  44                         // up to 4 numbers
  45                         break;
  46                     }
  47                     numeric = false;
  48                     vidx++;
  49                 }
  50             } else {
  51                 if (numeric) {
  52                     ver[vidx] = ver[vidx] * 10 + (c - '0');
  53                     if (ver[vidx] > 255) {
  54                         // VersionInfo does not support numbers
  55                         // greater than 255.  In such case, we
  56                         // ignore the number and the rest
  57                         ver[vidx] = 0;
  58                         break;
  59                     }
  60                 } else {
  61                     numeric = true;
  62                     ver[vidx] = c - '0';
  63                 }
  64             }
  65         }
  66
  67         return VersionInfo.getInstance(ver[0], ver[1], ver[2], ver[3]);
  68     }
  69
  70     static {
  71         javaVersion = getInstanceLenient(javaVersionString);
  72
  73         VersionInfo java14Version = VersionInfo.getInstance("1.4.0");
  74
  75         isJDK14OrHigher = javaVersion.compareTo(java14Version) >= 0;
  76     }
  77
  78     public static boolean enabled() {
  79         return debug;
  80     }
  81
  82     public static boolean enabled(String arg) {
  83         if (debug) {
  84             boolean result = params.indexOf(arg) != -1;
  85             if (help) System.out.println("\nICUDebug.enabled(" + arg + ") = " + result);
  86             return result;
  87         }
  88         return false;
  89     }
  90
  91     public static String value(String arg) {
  92         String result = "false";
  93         if (debug) {
  94             int index = params.indexOf(arg);
  95             if (index != -1) {
  96                 index += arg.length();
  97                 if (params.length() > index && params.charAt(index) == '=') {
  98                     index += 1;
  99                     int limit = params.indexOf(",", index);
 100                     result = params.substring(index, limit == -1 ? params.length() : limit);
 101                 } else {
 102                     result = "true";
 103                 }
 104             }
 105
 106             if (help) System.out.println("\nICUDebug.value(" + arg + ") = " + result);
 107         }
 108         return result;
 109     }
 110
 111 //    static public void main(String[] args) {
 112 //        // test
 113 //        String[] tests = {
 114 //            "1.3.0",
 115 //            "1.3.0_02",
 116 //            "1.3.1ea",
 117 //            "1.4.1b43",
 118 //            "___41___5",
 119 //            "x1.4.51xx89ea.7f",
 120 //            "1.6_2009",
 121 //            "10-100-1000-10000",
 122 //            "beta",
 123 //            "0",
 124 //        };
 125 //        for (int i = 0; i < tests.length; ++i) {
 126 //            System.out.println(tests[i] + " => " + getInstanceLenient(tests[i]));
 127 //        }
 128 //    }
 129 }