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annotate src/org/eclipse/jetty/util/StringUtil.java @ 804:9f5ba30722bb
remove org.eclipse.jetty.util.ajax
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Wed, 07 Sep 2016 21:28:02 -0600 |
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1 // |
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2 // ======================================================================== |
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
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4 // ------------------------------------------------------------------------ |
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5 // All rights reserved. This program and the accompanying materials |
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6 // are made available under the terms of the Eclipse Public License v1.0 |
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7 // and Apache License v2.0 which accompanies this distribution. |
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8 // |
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9 // The Eclipse Public License is available at |
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10 // http://www.eclipse.org/legal/epl-v10.html |
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11 // |
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12 // The Apache License v2.0 is available at |
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13 // http://www.opensource.org/licenses/apache2.0.php |
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14 // |
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15 // You may elect to redistribute this code under either of these licenses. |
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16 // ======================================================================== |
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17 // |
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18 |
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19 package org.eclipse.jetty.util; |
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20 |
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21 import java.io.UnsupportedEncodingException; |
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22 import java.nio.charset.Charset; |
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23 |
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24 import org.eclipse.jetty.util.log.Log; |
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25 import org.eclipse.jetty.util.log.Logger; |
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26 |
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27 /** Fast String Utilities. |
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28 * |
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29 * These string utilities provide both conveniance methods and |
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30 * performance improvements over most standard library versions. The |
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31 * main aim of the optimizations is to avoid object creation unless |
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32 * absolutely required. |
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33 * |
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34 * |
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35 */ |
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36 public class StringUtil |
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37 { |
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38 private static final Logger LOG = Log.getLogger(StringUtil.class); |
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39 |
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40 public static final String ALL_INTERFACES="0.0.0.0"; |
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41 public static final String CRLF="\015\012"; |
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42 public static final String __LINE_SEPARATOR= |
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43 System.getProperty("line.separator","\n"); |
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44 |
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45 public static final String __ISO_8859_1="ISO-8859-1"; |
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46 public final static String __UTF8="UTF-8"; |
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47 public final static String __UTF8Alt="UTF8"; |
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48 public final static String __UTF16="UTF-16"; |
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49 |
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50 public final static Charset __UTF8_CHARSET; |
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51 public final static Charset __ISO_8859_1_CHARSET; |
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52 |
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53 static |
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54 { |
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55 __UTF8_CHARSET=Charset.forName(__UTF8); |
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56 __ISO_8859_1_CHARSET=Charset.forName(__ISO_8859_1); |
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57 } |
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58 |
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59 private static char[] lowercases = { |
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60 '\000','\001','\002','\003','\004','\005','\006','\007', |
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61 '\010','\011','\012','\013','\014','\015','\016','\017', |
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62 '\020','\021','\022','\023','\024','\025','\026','\027', |
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63 '\030','\031','\032','\033','\034','\035','\036','\037', |
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64 '\040','\041','\042','\043','\044','\045','\046','\047', |
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65 '\050','\051','\052','\053','\054','\055','\056','\057', |
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66 '\060','\061','\062','\063','\064','\065','\066','\067', |
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67 '\070','\071','\072','\073','\074','\075','\076','\077', |
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68 '\100','\141','\142','\143','\144','\145','\146','\147', |
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69 '\150','\151','\152','\153','\154','\155','\156','\157', |
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70 '\160','\161','\162','\163','\164','\165','\166','\167', |
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71 '\170','\171','\172','\133','\134','\135','\136','\137', |
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72 '\140','\141','\142','\143','\144','\145','\146','\147', |
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73 '\150','\151','\152','\153','\154','\155','\156','\157', |
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74 '\160','\161','\162','\163','\164','\165','\166','\167', |
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75 '\170','\171','\172','\173','\174','\175','\176','\177' }; |
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76 |
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77 /* ------------------------------------------------------------ */ |
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78 /** |
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79 * fast lower case conversion. Only works on ascii (not unicode) |
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80 * @param s the string to convert |
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81 * @return a lower case version of s |
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82 */ |
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83 public static String asciiToLowerCase(String s) |
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84 { |
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85 char[] c = null; |
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86 int i=s.length(); |
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87 |
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88 // look for first conversion |
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89 while (i-->0) |
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90 { |
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91 char c1=s.charAt(i); |
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92 if (c1<=127) |
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93 { |
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94 char c2=lowercases[c1]; |
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95 if (c1!=c2) |
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96 { |
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97 c=s.toCharArray(); |
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98 c[i]=c2; |
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99 break; |
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100 } |
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101 } |
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102 } |
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103 |
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104 while (i-->0) |
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105 { |
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106 if(c[i]<=127) |
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107 c[i] = lowercases[c[i]]; |
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108 } |
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109 |
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110 return c==null?s:new String(c); |
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111 } |
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112 |
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113 |
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114 /* ------------------------------------------------------------ */ |
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115 public static boolean startsWithIgnoreCase(String s,String w) |
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116 { |
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117 if (w==null) |
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118 return true; |
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119 |
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120 if (s==null || s.length()<w.length()) |
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121 return false; |
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122 |
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123 for (int i=0;i<w.length();i++) |
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124 { |
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125 char c1=s.charAt(i); |
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126 char c2=w.charAt(i); |
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127 if (c1!=c2) |
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128 { |
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129 if (c1<=127) |
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130 c1=lowercases[c1]; |
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131 if (c2<=127) |
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132 c2=lowercases[c2]; |
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133 if (c1!=c2) |
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134 return false; |
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135 } |
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136 } |
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137 return true; |
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138 } |
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139 |
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140 /* ------------------------------------------------------------ */ |
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141 public static boolean endsWithIgnoreCase(String s,String w) |
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142 { |
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143 if (w==null) |
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144 return true; |
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145 |
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146 if (s==null) |
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147 return false; |
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148 |
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149 int sl=s.length(); |
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150 int wl=w.length(); |
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151 |
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152 if (sl<wl) |
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153 return false; |
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154 |
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155 for (int i=wl;i-->0;) |
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156 { |
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157 char c1=s.charAt(--sl); |
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158 char c2=w.charAt(i); |
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159 if (c1!=c2) |
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160 { |
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161 if (c1<=127) |
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162 c1=lowercases[c1]; |
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163 if (c2<=127) |
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164 c2=lowercases[c2]; |
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165 if (c1!=c2) |
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166 return false; |
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167 } |
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168 } |
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169 return true; |
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170 } |
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171 |
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172 /* ------------------------------------------------------------ */ |
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173 /** |
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174 * returns the next index of a character from the chars string |
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175 */ |
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176 public static int indexFrom(String s,String chars) |
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177 { |
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178 for (int i=0;i<s.length();i++) |
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179 if (chars.indexOf(s.charAt(i))>=0) |
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180 return i; |
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181 return -1; |
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182 } |
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183 |
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184 /* ------------------------------------------------------------ */ |
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185 /** |
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186 * replace substrings within string. |
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187 */ |
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188 public static String replace(String s, String sub, String with) |
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189 { |
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190 int c=0; |
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191 int i=s.indexOf(sub,c); |
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192 if (i == -1) |
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193 return s; |
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194 |
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195 StringBuilder buf = new StringBuilder(s.length()+with.length()); |
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196 |
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197 do |
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198 { |
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199 buf.append(s.substring(c,i)); |
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200 buf.append(with); |
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201 c=i+sub.length(); |
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202 } while ((i=s.indexOf(sub,c))!=-1); |
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203 |
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204 if (c<s.length()) |
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205 buf.append(s.substring(c,s.length())); |
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206 |
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207 return buf.toString(); |
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208 |
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209 } |
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210 |
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211 |
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212 /* ------------------------------------------------------------ */ |
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213 /** Remove single or double quotes. |
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214 */ |
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215 public static String unquote(String s) |
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216 { |
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217 return QuotedStringTokenizer.unquote(s); |
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218 } |
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219 |
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220 |
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221 /* ------------------------------------------------------------ */ |
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222 /** Append substring to StringBuilder |
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223 * @param buf StringBuilder to append to |
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224 * @param s String to append from |
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225 * @param offset The offset of the substring |
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226 * @param length The length of the substring |
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227 */ |
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228 public static void append(StringBuilder buf, |
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229 String s, |
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230 int offset, |
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231 int length) |
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232 { |
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233 synchronized(buf) |
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234 { |
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235 int end=offset+length; |
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236 for (int i=offset; i<end;i++) |
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237 { |
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238 if (i>=s.length()) |
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239 break; |
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240 buf.append(s.charAt(i)); |
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241 } |
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242 } |
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243 } |
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244 |
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245 |
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246 /* ------------------------------------------------------------ */ |
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247 /** |
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248 * append hex digit |
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249 * |
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250 */ |
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251 public static void append(StringBuilder buf,byte b,int base) |
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252 { |
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253 int bi=0xff&b; |
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254 int c='0'+(bi/base)%base; |
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255 if (c>'9') |
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256 c= 'a'+(c-'0'-10); |
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257 buf.append((char)c); |
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258 c='0'+bi%base; |
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259 if (c>'9') |
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260 c= 'a'+(c-'0'-10); |
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261 buf.append((char)c); |
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262 } |
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263 |
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264 /* ------------------------------------------------------------ */ |
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265 public static void append2digits(StringBuffer buf,int i) |
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266 { |
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267 if (i<100) |
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268 { |
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269 buf.append((char)(i/10+'0')); |
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270 buf.append((char)(i%10+'0')); |
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271 } |
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272 } |
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273 |
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274 /* ------------------------------------------------------------ */ |
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275 public static void append2digits(StringBuilder buf,int i) |
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276 { |
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277 if (i<100) |
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278 { |
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279 buf.append((char)(i/10+'0')); |
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280 buf.append((char)(i%10+'0')); |
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281 } |
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282 } |
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283 |
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284 /* ------------------------------------------------------------ */ |
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285 /** Return a non null string. |
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286 * @param s String |
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287 * @return The string passed in or empty string if it is null. |
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288 */ |
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289 public static String nonNull(String s) |
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290 { |
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291 if (s==null) |
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292 return ""; |
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293 return s; |
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294 } |
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295 |
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296 /* ------------------------------------------------------------ */ |
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297 public static boolean equals(String s,char[] buf, int offset, int length) |
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298 { |
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299 if (s.length()!=length) |
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300 return false; |
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301 for (int i=0;i<length;i++) |
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302 if (buf[offset+i]!=s.charAt(i)) |
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303 return false; |
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304 return true; |
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305 } |
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306 |
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307 /* ------------------------------------------------------------ */ |
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308 public static String toUTF8String(byte[] b,int offset,int length) |
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309 { |
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310 try |
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311 { |
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312 return new String(b,offset,length,__UTF8); |
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313 } |
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314 catch (UnsupportedEncodingException e) |
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315 { |
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316 throw new IllegalArgumentException(e); |
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317 } |
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318 } |
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319 |
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320 /* ------------------------------------------------------------ */ |
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321 public static String toString(byte[] b,int offset,int length,String charset) |
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322 { |
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323 try |
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324 { |
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325 return new String(b,offset,length,charset); |
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326 } |
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327 catch (UnsupportedEncodingException e) |
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328 { |
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329 throw new IllegalArgumentException(e); |
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330 } |
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331 } |
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332 |
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333 |
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334 /* ------------------------------------------------------------ */ |
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335 public static boolean isUTF8(String charset) |
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336 { |
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337 return __UTF8.equalsIgnoreCase(charset)||__UTF8Alt.equalsIgnoreCase(charset); |
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338 } |
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339 |
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340 |
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341 /* ------------------------------------------------------------ */ |
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342 public static String printable(String name) |
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343 { |
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344 if (name==null) |
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345 return null; |
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346 StringBuilder buf = new StringBuilder(name.length()); |
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347 for (int i=0;i<name.length();i++) |
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348 { |
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349 char c=name.charAt(i); |
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350 if (!Character.isISOControl(c)) |
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351 buf.append(c); |
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352 } |
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353 return buf.toString(); |
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354 } |
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355 |
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356 /* ------------------------------------------------------------ */ |
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357 public static String printable(byte[] b) |
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358 { |
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359 StringBuilder buf = new StringBuilder(); |
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360 for (int i=0;i<b.length;i++) |
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361 { |
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362 char c=(char)b[i]; |
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363 if (Character.isWhitespace(c)|| c>' ' && c<0x7f) |
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364 buf.append(c); |
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365 else |
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366 { |
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367 buf.append("0x"); |
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368 TypeUtil.toHex(b[i],buf); |
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369 } |
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370 } |
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371 return buf.toString(); |
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372 } |
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373 |
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374 public static byte[] getBytes(String s) |
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375 { |
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376 try |
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377 { |
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378 return s.getBytes(__ISO_8859_1); |
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379 } |
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380 catch(Exception e) |
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381 { |
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382 LOG.warn(e); |
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383 return s.getBytes(); |
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384 } |
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385 } |
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386 |
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387 public static byte[] getBytes(String s,String charset) |
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388 { |
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389 try |
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390 { |
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391 return s.getBytes(charset); |
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392 } |
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393 catch(Exception e) |
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394 { |
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395 LOG.warn(e); |
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396 return s.getBytes(); |
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397 } |
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398 } |
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399 |
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400 |
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401 |
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402 /** |
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403 * Converts a binary SID to a string SID |
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404 * |
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405 * http://en.wikipedia.org/wiki/Security_Identifier |
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406 * |
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407 * S-1-IdentifierAuthority-SubAuthority1-SubAuthority2-...-SubAuthorityn |
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408 */ |
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409 public static String sidBytesToString(byte[] sidBytes) |
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410 { |
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411 StringBuilder sidString = new StringBuilder(); |
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412 |
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413 // Identify this as a SID |
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414 sidString.append("S-"); |
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415 |
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416 // Add SID revision level (expect 1 but may change someday) |
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417 sidString.append(Byte.toString(sidBytes[0])).append('-'); |
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418 |
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419 StringBuilder tmpBuilder = new StringBuilder(); |
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420 |
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421 // crunch the six bytes of issuing authority value |
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422 for (int i = 2; i <= 7; ++i) |
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423 { |
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424 tmpBuilder.append(Integer.toHexString(sidBytes[i] & 0xFF)); |
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425 } |
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426 |
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427 sidString.append(Long.parseLong(tmpBuilder.toString(), 16)); // '-' is in the subauth loop |
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428 |
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429 // the number of subAuthorities we need to attach |
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430 int subAuthorityCount = sidBytes[1]; |
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431 |
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432 // attach each of the subAuthorities |
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433 for (int i = 0; i < subAuthorityCount; ++i) |
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434 { |
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435 int offset = i * 4; |
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436 tmpBuilder.setLength(0); |
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437 // these need to be zero padded hex and little endian |
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438 tmpBuilder.append(String.format("%02X%02X%02X%02X", |
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439 (sidBytes[11 + offset] & 0xFF), |
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440 (sidBytes[10 + offset] & 0xFF), |
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441 (sidBytes[9 + offset] & 0xFF), |
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442 (sidBytes[8 + offset] & 0xFF))); |
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443 sidString.append('-').append(Long.parseLong(tmpBuilder.toString(), 16)); |
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444 } |
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445 |
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446 return sidString.toString(); |
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447 } |
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448 |
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449 /** |
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450 * Converts a string SID to a binary SID |
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451 * |
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452 * http://en.wikipedia.org/wiki/Security_Identifier |
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453 * |
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454 * S-1-IdentifierAuthority-SubAuthority1-SubAuthority2-...-SubAuthorityn |
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455 */ |
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456 public static byte[] sidStringToBytes( String sidString ) |
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457 { |
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458 String[] sidTokens = sidString.split("-"); |
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459 |
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460 int subAuthorityCount = sidTokens.length - 3; // S-Rev-IdAuth- |
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461 |
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462 int byteCount = 0; |
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463 byte[] sidBytes = new byte[1 + 1 + 6 + (4 * subAuthorityCount)]; |
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464 |
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465 // the revision byte |
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466 sidBytes[byteCount++] = (byte)Integer.parseInt(sidTokens[1]); |
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467 |
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468 // the # of sub authorities byte |
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469 sidBytes[byteCount++] = (byte)subAuthorityCount; |
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470 |
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471 // the certAuthority |
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472 String hexStr = Long.toHexString(Long.parseLong(sidTokens[2])); |
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473 |
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474 while( hexStr.length() < 12) // pad to 12 characters |
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475 { |
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476 hexStr = "0" + hexStr; |
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477 } |
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478 |
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479 // place the certAuthority 6 bytes |
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480 for ( int i = 0 ; i < hexStr.length(); i = i + 2) |
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481 { |
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482 sidBytes[byteCount++] = (byte)Integer.parseInt(hexStr.substring(i, i + 2),16); |
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483 } |
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484 |
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485 |
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486 for ( int i = 3; i < sidTokens.length ; ++i) |
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487 { |
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488 hexStr = Long.toHexString(Long.parseLong(sidTokens[i])); |
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489 |
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490 while( hexStr.length() < 8) // pad to 8 characters |
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491 { |
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492 hexStr = "0" + hexStr; |
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493 } |
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494 |
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495 // place the inverted sub authorities, 4 bytes each |
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496 for ( int j = hexStr.length(); j > 0; j = j - 2) |
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497 { |
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498 sidBytes[byteCount++] = (byte)Integer.parseInt(hexStr.substring(j-2, j),16); |
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499 } |
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500 } |
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501 |
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502 return sidBytes; |
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503 } |
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504 } |