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1 /* |
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2 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Class-path" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 import java.io.File; |
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27 import java.io.FileInputStream; |
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28 import java.io.FileNotFoundException; |
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29 import java.io.IOException; |
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30 import java.lang.ref.SoftReference; |
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31 import java.nio.file.FileSystems; |
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32 import java.util.ArrayList; |
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33 import java.util.HashMap; |
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34 import java.util.List; |
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35 import java.util.Map; |
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36 |
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37 import sun.util.calendar.*; |
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38 |
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39 /** |
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40 * <code>ZoneInfoFile</code> reads Zone information files in the |
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41 * <java.home>/lib/zi directory and provides time zone |
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42 * information in the form of a {@link ZoneInfo} object. Also, it |
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43 * reads the ZoneInfoMappings file to obtain time zone IDs information |
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44 * that is used by the {@link ZoneInfo} class. The directory layout |
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45 * and data file formats are as follows. |
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46 * |
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47 * <p><strong>Directory layout</strong><p> |
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48 * |
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49 * All zone data files and ZoneInfoMappings are put under the |
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50 * <java.home>/lib/zi directory. A path name for a given time |
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51 * zone ID is a concatenation of <java.home>/lib/zi/ and the |
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52 * time zone ID. (The file separator is replaced with the platform |
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53 * dependent value. e.g., '\' for Win32.) An example layout will look |
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54 * like as follows. |
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55 * <blockquote> |
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56 * <pre> |
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57 * <java.home>/lib/zi/Africa/Addis_Ababa |
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58 * /Africa/Dakar |
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59 * /America/Los_Angeles |
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60 * /Asia/Singapore |
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61 * /EET |
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62 * /Europe/Oslo |
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63 * /GMT |
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64 * /Pacific/Galapagos |
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65 * ... |
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66 * /ZoneInfoMappings |
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67 * </pre> |
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68 * </blockquote> |
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69 * |
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70 * A zone data file has specific information of each zone. |
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71 * <code>ZoneInfoMappings</code> has global information of zone IDs so |
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72 * that the information can be obtained without instantiating all time |
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73 * zones. |
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74 * |
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75 * <p><strong>File format</strong><p> |
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76 * |
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77 * Two binary-file formats based on a simple Tag-Length-Value format are used |
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78 * to describe TimeZone information. The generic format of a data file is: |
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79 * <blockquote> |
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80 * <pre> |
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81 * DataFile { |
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82 * u1 magic[7]; |
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83 * u1 version; |
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84 * data_item data[]; |
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85 * } |
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86 * </pre> |
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87 * </blockquote> |
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88 * where <code>magic</code> is a magic number identifying a file |
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89 * format, <code>version</code> is the format version number, and |
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90 * <code>data</code> is one or more <code>data_item</code>s. The |
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91 * <code>data_item</code> structure is: |
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92 * <blockquote> |
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93 * <pre> |
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94 * data_item { |
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95 * u1 tag; |
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96 * u2 length; |
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97 * u1 value[length]; |
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98 * } |
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99 * </pre> |
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100 * </blockquote> |
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101 * where <code>tag</code> indicates the data type of the item, |
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102 * <code>length</code> is a byte count of the following |
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103 * <code>value</code> that is the content of item data. |
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104 * <p> |
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105 * All data is stored in the big-endian order. There is no boundary |
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106 * alignment between date items. |
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107 * |
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108 * <p><strong>1. ZoneInfo data file</strong><p> |
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109 * |
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110 * Each ZoneInfo data file consists of the following members. |
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111 * <br> |
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112 * <blockquote> |
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113 * <pre> |
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114 * ZoneInfoDataFile { |
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115 * u1 magic[7]; |
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116 * u1 version; |
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117 * SET OF<sup>1</sup> { |
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118 * transition transitions<sup>2</sup>; |
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119 * offset_table offsets<sup>2</sup>; |
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120 * simpletimezone stzparams<sup>2</sup>; |
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121 * raw_offset rawoffset; |
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122 * dstsaving dst; |
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123 * checksum crc32; |
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124 * gmtoffsetwillchange gmtflag<sup>2</sup>; |
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125 * } |
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126 * } |
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127 * 1: an unordered collection of zero or one occurrences of each item |
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128 * 2: optional item |
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129 * </pre> |
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130 * </blockquote> |
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131 * <code>magic</code> is a byte-string constant identifying the |
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132 * ZoneInfo data file. This field must be <code>"javazi\0"</code> |
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133 * defined as {@link #JAVAZI_LABEL}. |
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134 * <p> |
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135 * <code>version</code> is the version number of the file format. This |
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136 * will be used for compatibility check. This field must be |
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137 * <code>0x01</code> in this version. |
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138 * <p> |
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139 * <code>transition</code>, <code>offset_table</code> and |
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140 * <code>simpletimezone</code> have information of time transition |
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141 * from the past to the future. Therefore, these structures don't |
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142 * exist if the zone didn't change zone names and haven't applied DST in |
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143 * the past, and haven't planned to apply it. (e.g. Asia/Tokyo zone) |
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144 * <p> |
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145 * <code>raw_offset</code>, <code>dstsaving</code> and <code>checksum</code> |
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146 * exist in every zoneinfo file. They are used by TimeZone.class indirectly. |
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147 * |
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148 * <p><strong>1.1 <code>transition</code> structure</strong><p><a name="transition"></a> |
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149 * <blockquote> |
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150 * <pre> |
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151 * transition { |
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152 * u1 tag; // 0x04 : constant |
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153 * u2 length; // byte length of whole values |
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154 * s8 value[length/8]; // transitions in `long' |
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155 * } |
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156 * </pre> |
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157 * </blockquote> |
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158 * See {@link ZoneInfo#transitions ZoneInfo.transitions} about the value. |
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159 * |
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160 * <p><strong>1.2 <code>offset_table</code> structure</strong><p> |
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161 * <blockquote> |
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162 * <pre> |
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163 * offset_table { |
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164 * u1 tag; // 0x05 : constant |
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165 * u2 length; // byte length of whole values |
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166 * s4 value[length/4]; // offset values in `int' |
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167 * } |
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168 * </pre> |
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169 * </blockquote> |
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170 * |
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171 * <p><strong>1.3 <code>simpletimezone</code> structure</strong><p> |
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172 * See {@link ZoneInfo#simpleTimeZoneParams ZoneInfo.simpleTimeZoneParams} |
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173 * about the value. |
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174 * <blockquote> |
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175 * <pre> |
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176 * simpletimezone { |
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177 * u1 tag; // 0x06 : constant |
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178 * u2 length; // byte length of whole values |
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179 * s4 value[length/4]; // SimpleTimeZone parameters |
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180 * } |
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181 * </pre> |
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182 * </blockquote> |
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183 * See {@link ZoneInfo#offsets ZoneInfo.offsets} about the value. |
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184 * |
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185 * <p><strong>1.4 <code>raw_offset</code> structure</strong><p> |
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186 * <blockquote> |
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187 * <pre> |
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188 * raw_offset { |
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189 * u1 tag; // 0x01 : constant |
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190 * u2 length; // must be 4. |
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191 * s4 value; // raw GMT offset [millisecond] |
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192 * } |
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193 * </pre> |
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194 * </blockquote> |
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195 * See {@link ZoneInfo#rawOffset ZoneInfo.rawOffset} about the value. |
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196 * |
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197 * <p><strong>1.5 <code>dstsaving</code> structure</strong><p> |
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198 * Value has dstSaving in seconds. |
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199 * <blockquote> |
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200 * <pre> |
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201 * dstsaving { |
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202 * u1 tag; // 0x02 : constant |
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203 * u2 length; // must be 2. |
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204 * s2 value; // DST save value [second] |
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205 * } |
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206 * </pre> |
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207 * </blockquote> |
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208 * See {@link ZoneInfo#dstSavings ZoneInfo.dstSavings} about value. |
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209 * |
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210 * <p><strong>1.6 <code>checksum</code> structure</strong><p> |
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211 * <blockquote> |
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212 * <pre> |
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213 * checksum { |
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214 * u1 tag; // 0x03 : constant |
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215 * u2 length; // must be 4. |
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216 * s4 value; // CRC32 value of transitions |
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217 * } |
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218 * </pre> |
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219 * </blockquote> |
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220 * See {@link ZoneInfo#checksum ZoneInfo.checksum}. |
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221 * |
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222 * <p><strong>1.7 <code>gmtoffsetwillchange</code> structure</strong><p> |
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223 * This record has a flag value for {@link ZoneInfo#rawOffsetWillChange}. |
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224 * If this record is not present in a zoneinfo file, 0 is assumed for |
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225 * the value. |
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226 * <blockquote> |
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227 * <pre> |
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228 * gmtoffsetwillchange { |
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229 * u1 tag; // 0x07 : constant |
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230 * u2 length; // must be 1. |
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231 * u1 value; // 1: if the GMT raw offset will change |
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232 * // in the future, 0, otherwise. |
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233 * } |
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234 * </pre> |
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235 * </blockquote> |
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236 * |
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237 * |
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238 * <p><strong>2. ZoneInfoMappings file</strong><p> |
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239 * |
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240 * The ZoneInfoMappings file consists of the following members. |
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241 * <br> |
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242 * <blockquote> |
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243 * <pre> |
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244 * ZoneInfoMappings { |
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245 * u1 magic[7]; |
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246 * u1 version; |
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247 * SET OF { |
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248 * versionName version; |
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249 * zone_id_table zoneIDs; |
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250 * raw_offset_table rawoffsets; |
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251 * raw_offset_index_table rawoffsetindices; |
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252 * alias_table aliases; |
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253 * excluded_list excludedList; |
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254 * } |
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255 * } |
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256 * </pre> |
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257 * </blockquote> |
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258 * |
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259 * <code>magic</code> is a byte-string constant which has the file type. |
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260 * This field must be <code>"javazm\0"</code> defined as {@link #JAVAZM_LABEL}. |
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261 * <p> |
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262 * <code>version</code> is the version number of this file |
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263 * format. This will be used for compatibility check. This field must |
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264 * be <code>0x01</code> in this version. |
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265 * <p> |
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266 * <code>versionName</code> shows which version of Olson's data has been used |
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267 * to generate this ZoneInfoMappings. (e.g. <code>tzdata2000g</code>) <br> |
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268 * This field is for trouble-shooting and isn't usually used in runtime. |
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269 * <p> |
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270 * <code>zone_id_table</code>, <code>raw_offset_index_table</code> and |
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271 * <code>alias_table</code> are general information of supported |
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272 * zones. |
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273 * |
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274 * <p><strong>2.1 <code>zone_id_table</code> structure</strong><p> |
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275 * The list of zone IDs included in the zi database. The list does |
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276 * <em>not</em> include zone IDs, if any, listed in excludedList. |
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277 * <br> |
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278 * <blockquote> |
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279 * <pre> |
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280 * zone_id_table { |
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281 * u1 tag; // 0x40 : constant |
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282 * u2 length; // byte length of whole values |
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283 * u2 zone_id_count; |
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284 * zone_id value[zone_id_count]; |
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285 * } |
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286 * |
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287 * zone_id { |
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288 * u1 byte_length; // byte length of id |
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289 * u1 id[byte_length]; // zone name string |
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290 * } |
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291 * </pre> |
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292 * </blockquote> |
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293 * |
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294 * <p><strong>2.2 <code>raw_offset_table</code> structure</strong><p> |
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295 * <br> |
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296 * <blockquote> |
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297 * <pre> |
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298 * raw_offset_table { |
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299 * u1 tag; // 0x41 : constant |
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300 * u2 length; // byte length of whole values |
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301 * s4 value[length/4]; // raw GMT offset in milliseconds |
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302 * } |
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303 * </pre> |
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304 * </blockquote> |
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305 * |
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306 * <p><strong>2.3 <code>raw_offset_index_table</code> structure</strong><p> |
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307 * <br> |
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308 * <blockquote> |
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309 * <pre> |
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310 * raw_offset_index_table { |
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311 * u1 tag; // 0x42 : constant |
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312 * u2 length; // byte length of whole values |
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313 * u1 value[length]; |
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314 * } |
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315 * </pre> |
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316 * </blockquote> |
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317 * |
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318 * <p><strong>2.4 <code>alias_table</code> structure</strong><p> |
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319 * <br> |
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320 * <blockquote> |
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321 * <pre> |
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322 * alias_table { |
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323 * u1 tag; // 0x43 : constant |
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324 * u2 length; // byte length of whole values |
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325 * u2 nentries; // number of id-pairs |
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326 * id_pair value[nentries]; |
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327 * } |
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328 * |
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329 * id_pair { |
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330 * zone_id aliasname; |
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331 * zone_id ID; |
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332 * } |
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333 * </pre> |
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334 * </blockquote> |
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335 * |
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336 * <p><strong>2.5 <code>versionName</code> structure</strong><p> |
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337 * <br> |
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338 * <blockquote> |
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339 * <pre> |
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340 * versionName { |
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341 * u1 tag; // 0x44 : constant |
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342 * u2 length; // byte length of whole values |
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343 * u1 value[length]; |
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344 * } |
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345 * </pre> |
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346 * </blockquote> |
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347 * |
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348 * <p><strong>2.6 <code>excludeList</code> structure</strong><p> |
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349 * The list of zone IDs whose zones will change their GMT offsets |
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350 * (a.k.a. raw offsets) some time in the future. Those IDs must be |
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351 * added to the list of zone IDs for getAvailableIDs(). Also they must |
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352 * be examined for getAvailableIDs(int) to determine the |
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353 * <em>current</em> GMT offsets. |
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354 * <br> |
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355 * <blockquote> |
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356 * <pre> |
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357 * excluded_list { |
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358 * u1 tag; // 0x45 : constant |
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359 * u2 length; // byte length of whole values |
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360 * u2 nentries; // number of zone_ids |
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361 * zone_id value[nentries]; // excluded zone IDs |
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362 * } |
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363 * </pre> |
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364 * </blockquote> |
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365 * |
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366 * @since 1.4 |
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367 */ |
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368 |
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369 public class ZoneInfoFile { |
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370 |
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371 /** |
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372 * The magic number for the ZoneInfo data file format. |
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373 */ |
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374 public static final byte[] JAVAZI_LABEL = { |
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375 (byte)'j', (byte)'a', (byte)'v', (byte)'a', (byte)'z', (byte)'i', (byte)'\0' |
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376 }; |
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377 private static final int JAVAZI_LABEL_LENGTH = JAVAZI_LABEL.length; |
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378 |
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379 /** |
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380 * The ZoneInfo data file format version number. Must increase |
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381 * one when any incompatible change has been made. |
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382 */ |
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383 public static final byte JAVAZI_VERSION = 0x01; |
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384 |
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385 /** |
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386 * Raw offset data item tag. |
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387 */ |
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388 public static final byte TAG_RawOffset = 1; |
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389 |
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390 /** |
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391 * Known last Daylight Saving Time save value data item tag. |
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392 */ |
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393 public static final byte TAG_LastDSTSaving = 2; |
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394 |
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395 /** |
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396 * Checksum data item tag. |
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397 */ |
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398 public static final byte TAG_CRC32 = 3; |
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399 |
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400 /** |
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401 * Transition data item tag. |
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402 */ |
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403 public static final byte TAG_Transition = 4; |
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404 |
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405 /** |
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406 * Offset table data item tag. |
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407 */ |
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408 public static final byte TAG_Offset = 5; |
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409 |
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410 /** |
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411 * SimpleTimeZone parameters data item tag. |
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412 */ |
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413 public static final byte TAG_SimpleTimeZone = 6; |
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414 |
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415 /** |
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416 * Raw GMT offset will change in the future. |
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417 */ |
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418 public static final byte TAG_GMTOffsetWillChange = 7; |
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419 |
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420 |
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421 /** |
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422 * The ZoneInfoMappings file name. |
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423 */ |
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424 public static final String JAVAZM_FILE_NAME = "ZoneInfoMappings"; |
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425 |
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426 /** |
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427 * The magic number for the ZoneInfoMappings file format. |
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428 */ |
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429 public static final byte[] JAVAZM_LABEL = { |
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430 (byte)'j', (byte)'a', (byte)'v', (byte)'a', (byte)'z', (byte)'m', (byte)'\0' |
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431 }; |
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432 private static final int JAVAZM_LABEL_LENGTH = JAVAZM_LABEL.length; |
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433 |
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434 /** |
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435 * The ZoneInfoMappings file format version number. Must increase |
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436 * one when any incompatible change has been made. |
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437 */ |
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438 public static final byte JAVAZM_VERSION = 0x01; |
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439 |
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440 /** |
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441 * Time zone IDs data item tag. |
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442 */ |
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443 public static final byte TAG_ZoneIDs = 64; |
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444 |
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445 /** |
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446 * Raw GMT offsets table data item tag. |
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447 */ |
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448 public static final byte TAG_RawOffsets = 65; |
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449 |
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450 /** |
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451 * Indices to the raw GMT offset table data item tag. |
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452 */ |
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453 public static final byte TAG_RawOffsetIndices = 66; |
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454 |
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455 /** |
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456 * Time zone aliases table data item tag. |
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457 */ |
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458 public static final byte TAG_ZoneAliases = 67; |
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459 |
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460 /** |
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461 * Olson's public zone information version tag. |
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462 */ |
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463 public static final byte TAG_TZDataVersion = 68; |
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464 |
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465 /** |
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466 * Excluded zones item tag. (Added in Mustang) |
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467 */ |
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468 public static final byte TAG_ExcludedZones = 69; |
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469 |
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470 private static Map<String, ZoneInfoOld> zoneInfoObjects = null; |
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471 |
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472 private static final ZoneInfoOld GMT = new ZoneInfoOld("GMT", 0); |
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473 |
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474 static String ziDir; |
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475 |
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476 /** |
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477 * Converts the given time zone ID to a platform dependent path |
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478 * name. For example, "America/Los_Angeles" is converted to |
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479 * "America\Los_Angeles" on Win32. |
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480 * @return a modified ID replacing '/' with {@link |
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481 * java.io.File#separatorChar File.separatorChar} if needed. |
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482 */ |
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483 public static String getFileName(String ID) { |
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484 if (File.separatorChar == '/') { |
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485 return ID; |
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486 } |
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487 return ID.replace('/', File.separatorChar); |
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488 } |
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489 |
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490 /** |
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491 * Gets a ZoneInfo with the given GMT offset. The object |
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492 * has its ID in the format of GMT{+|-}hh:mm. |
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493 * |
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494 * @param originalId the given custom id (before normalized such as "GMT+9") |
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495 * @param gmtOffset GMT offset <em>in milliseconds</em> |
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496 * @return a ZoneInfo constructed with the given GMT offset |
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497 */ |
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498 public static ZoneInfoOld getCustomTimeZone(String originalId, int gmtOffset) { |
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499 String id = toCustomID(gmtOffset); |
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500 |
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501 ZoneInfoOld zi = getFromCache(id); |
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502 if (zi == null) { |
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503 zi = new ZoneInfoOld(id, gmtOffset); |
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504 zi = addToCache(id, zi); |
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505 if (!id.equals(originalId)) { |
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506 zi = addToCache(originalId, zi); |
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507 } |
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508 } |
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509 return (ZoneInfoOld) zi.clone(); |
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510 } |
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511 |
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512 public static String toCustomID(int gmtOffset) { |
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513 char sign; |
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514 int offset = gmtOffset / 60000; |
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515 |
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516 if (offset >= 0) { |
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517 sign = '+'; |
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518 } else { |
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519 sign = '-'; |
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520 offset = -offset; |
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521 } |
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522 int hh = offset / 60; |
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523 int mm = offset % 60; |
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524 |
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525 char[] buf = new char[] { 'G', 'M', 'T', sign, '0', '0', ':', '0', '0' }; |
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526 if (hh >= 10) { |
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527 buf[4] += hh / 10; |
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528 } |
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529 buf[5] += hh % 10; |
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530 if (mm != 0) { |
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531 buf[7] += mm / 10; |
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532 buf[8] += mm % 10; |
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533 } |
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534 return new String(buf); |
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535 } |
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536 |
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537 /** |
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538 * @return a ZoneInfo instance created for the specified id, or |
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539 * null if there is no time zone data file found for the specified |
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540 * id. |
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541 */ |
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542 public static ZoneInfoOld getZoneInfoOld(String id) { |
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543 //treat GMT zone as special |
|
544 if ("GMT".equals(id)) |
|
545 return (ZoneInfoOld) GMT.clone(); |
|
546 ZoneInfoOld zi = getFromCache(id); |
|
547 if (zi == null) { |
|
548 Map<String, String> aliases = ZoneInfoOld.getCachedAliasTable(); |
|
549 if (aliases != null && aliases.get(id) != null) { |
|
550 return null; |
|
551 } |
|
552 zi = createZoneInfoOld(id); |
|
553 if (zi == null) { |
|
554 return null; |
|
555 } |
|
556 zi = addToCache(id, zi); |
|
557 } |
|
558 return (ZoneInfoOld) zi.clone(); |
|
559 } |
|
560 |
|
561 synchronized static ZoneInfoOld getFromCache(String id) { |
|
562 if (zoneInfoObjects == null) { |
|
563 return null; |
|
564 } |
|
565 return zoneInfoObjects.get(id); |
|
566 } |
|
567 |
|
568 synchronized static ZoneInfoOld addToCache(String id, ZoneInfoOld zi) { |
|
569 if (zoneInfoObjects == null) { |
|
570 zoneInfoObjects = new HashMap<>(); |
|
571 } else { |
|
572 ZoneInfoOld zone = zoneInfoObjects.get(id); |
|
573 if (zone != null) { |
|
574 return zone; |
|
575 } |
|
576 } |
|
577 zoneInfoObjects.put(id, zi); |
|
578 return zi; |
|
579 } |
|
580 |
|
581 private static ZoneInfoOld createZoneInfoOld(String id) { |
|
582 byte[] buf = readZoneInfoFile(getFileName(id)); |
|
583 if (buf == null) { |
|
584 return null; |
|
585 } |
|
586 |
|
587 int index = 0; |
|
588 int filesize = buf.length; |
|
589 int rawOffset = 0; |
|
590 int dstSavings = 0; |
|
591 int checksum = 0; |
|
592 boolean willGMTOffsetChange = false; |
|
593 long[] transitions = null; |
|
594 int[] offsets = null; |
|
595 int[] simpleTimeZoneParams = null; |
|
596 |
|
597 try { |
|
598 for (index = 0; index < JAVAZI_LABEL.length; index++) { |
|
599 if (buf[index] != JAVAZI_LABEL[index]) { |
|
600 System.err.println("ZoneInfoOld: wrong magic number: " + id); |
|
601 return null; |
|
602 } |
|
603 } |
|
604 if (buf[index++] > JAVAZI_VERSION) { |
|
605 System.err.println("ZoneInfo: incompatible version (" |
|
606 + buf[index - 1] + "): " + id); |
|
607 return null; |
|
608 } |
|
609 |
|
610 while (index < filesize) { |
|
611 byte tag = buf[index++]; |
|
612 int len = ((buf[index++] & 0xFF) << 8) + (buf[index++] & 0xFF); |
|
613 |
|
614 if (filesize < index+len) { |
|
615 break; |
|
616 } |
|
617 |
|
618 switch (tag) { |
|
619 case TAG_CRC32: |
|
620 { |
|
621 int val = buf[index++] & 0xff; |
|
622 val = (val << 8) + (buf[index++] & 0xff); |
|
623 val = (val << 8) + (buf[index++] & 0xff); |
|
624 val = (val << 8) + (buf[index++] & 0xff); |
|
625 checksum = val; |
|
626 } |
|
627 break; |
|
628 |
|
629 case TAG_LastDSTSaving: |
|
630 { |
|
631 short val = (short)(buf[index++] & 0xff); |
|
632 val = (short)((val << 8) + (buf[index++] & 0xff)); |
|
633 dstSavings = val * 1000; |
|
634 } |
|
635 break; |
|
636 |
|
637 case TAG_RawOffset: |
|
638 { |
|
639 int val = buf[index++] & 0xff; |
|
640 val = (val << 8) + (buf[index++] & 0xff); |
|
641 val = (val << 8) + (buf[index++] & 0xff); |
|
642 val = (val << 8) + (buf[index++] & 0xff); |
|
643 rawOffset = val; |
|
644 } |
|
645 break; |
|
646 |
|
647 case TAG_Transition: |
|
648 { |
|
649 int n = len / 8; |
|
650 transitions = new long[n]; |
|
651 for (int i = 0; i < n; i ++) { |
|
652 long val = buf[index++] & 0xff; |
|
653 val = (val << 8) + (buf[index++] & 0xff); |
|
654 val = (val << 8) + (buf[index++] & 0xff); |
|
655 val = (val << 8) + (buf[index++] & 0xff); |
|
656 val = (val << 8) + (buf[index++] & 0xff); |
|
657 val = (val << 8) + (buf[index++] & 0xff); |
|
658 val = (val << 8) + (buf[index++] & 0xff); |
|
659 val = (val << 8) + (buf[index++] & 0xff); |
|
660 transitions[i] = val; |
|
661 } |
|
662 } |
|
663 break; |
|
664 |
|
665 case TAG_Offset: |
|
666 { |
|
667 int n = len / 4; |
|
668 offsets = new int[n]; |
|
669 for (int i = 0; i < n; i ++) { |
|
670 int val = buf[index++] & 0xff; |
|
671 val = (val << 8) + (buf[index++] & 0xff); |
|
672 val = (val << 8) + (buf[index++] & 0xff); |
|
673 val = (val << 8) + (buf[index++] & 0xff); |
|
674 offsets[i] = val; |
|
675 } |
|
676 } |
|
677 break; |
|
678 |
|
679 case TAG_SimpleTimeZone: |
|
680 { |
|
681 if (len != 32 && len != 40) { |
|
682 System.err.println("ZoneInfo: wrong SimpleTimeZone parameter size"); |
|
683 return null; |
|
684 } |
|
685 int n = len / 4; |
|
686 simpleTimeZoneParams = new int[n]; |
|
687 for (int i = 0; i < n; i++) { |
|
688 int val = buf[index++] & 0xff; |
|
689 val = (val << 8) + (buf[index++] & 0xff); |
|
690 val = (val << 8) + (buf[index++] & 0xff); |
|
691 val = (val << 8) + (buf[index++] & 0xff); |
|
692 simpleTimeZoneParams[i] = val; |
|
693 } |
|
694 } |
|
695 break; |
|
696 |
|
697 case TAG_GMTOffsetWillChange: |
|
698 { |
|
699 if (len != 1) { |
|
700 System.err.println("ZoneInfo: wrong byte length for TAG_GMTOffsetWillChange"); |
|
701 } |
|
702 willGMTOffsetChange = buf[index++] == 1; |
|
703 } |
|
704 break; |
|
705 |
|
706 default: |
|
707 System.err.println("ZoneInfo: unknown tag < " + tag + ">. ignored."); |
|
708 index += len; |
|
709 break; |
|
710 } |
|
711 } |
|
712 } catch (Exception e) { |
|
713 System.err.println("ZoneInfo: corrupted zoneinfo file: " + id); |
|
714 return null; |
|
715 } |
|
716 |
|
717 if (index != filesize) { |
|
718 System.err.println("ZoneInfo: wrong file size: " + id); |
|
719 return null; |
|
720 } |
|
721 |
|
722 return new ZoneInfoOld(id, rawOffset, dstSavings, checksum, |
|
723 transitions, offsets, simpleTimeZoneParams, |
|
724 willGMTOffsetChange); |
|
725 } |
|
726 |
|
727 private volatile static SoftReference<List<String>> zoneIDs = null; |
|
728 |
|
729 static List<String> getZoneIDs() { |
|
730 List<String> ids = null; |
|
731 SoftReference<List<String>> cache = zoneIDs; |
|
732 if (cache != null) { |
|
733 ids = cache.get(); |
|
734 if (ids != null) { |
|
735 return ids; |
|
736 } |
|
737 } |
|
738 byte[] buf = null; |
|
739 buf = getZoneInfoOldMappings(); |
|
740 int index = JAVAZM_LABEL_LENGTH + 1; |
|
741 int filesize = buf.length; |
|
742 try { |
|
743 loop: |
|
744 while (index < filesize) { |
|
745 byte tag = buf[index++]; |
|
746 int len = ((buf[index++] & 0xFF) << 8) + (buf[index++] & 0xFF); |
|
747 |
|
748 switch (tag) { |
|
749 case TAG_ZoneIDs: |
|
750 { |
|
751 int n = (buf[index++] << 8) + (buf[index++] & 0xFF); |
|
752 ids = new ArrayList<>(n); |
|
753 |
|
754 for (int i = 0; i < n; i++) { |
|
755 byte m = buf[index++]; |
|
756 ids.add(new String(buf, index, m, "UTF-8")); |
|
757 index += m; |
|
758 } |
|
759 } |
|
760 break loop; |
|
761 |
|
762 default: |
|
763 index += len; |
|
764 break; |
|
765 } |
|
766 } |
|
767 } catch (Exception e) { |
|
768 System.err.println("ZoneInfoOld: corrupted " + JAVAZM_FILE_NAME); |
|
769 } |
|
770 |
|
771 zoneIDs = new SoftReference<>(ids); |
|
772 return ids; |
|
773 } |
|
774 |
|
775 /** |
|
776 * @return an alias table in HashMap where a key is an alias ID |
|
777 * (e.g., "PST") and its value is a real time zone ID (e.g., |
|
778 * "America/Los_Angeles"). |
|
779 */ |
|
780 static Map<String, String> getZoneAliases() { |
|
781 byte[] buf = getZoneInfoOldMappings(); |
|
782 int index = JAVAZM_LABEL_LENGTH + 1; |
|
783 int filesize = buf.length; |
|
784 Map<String, String> aliases = null; |
|
785 |
|
786 try { |
|
787 loop: |
|
788 while (index < filesize) { |
|
789 byte tag = buf[index++]; |
|
790 int len = ((buf[index++] & 0xFF) << 8) + (buf[index++] & 0xFF); |
|
791 |
|
792 switch (tag) { |
|
793 case TAG_ZoneAliases: |
|
794 { |
|
795 int n = (buf[index++] << 8) + (buf[index++] & 0xFF); |
|
796 aliases = new HashMap<>(n); |
|
797 for (int i = 0; i < n; i++) { |
|
798 byte m = buf[index++]; |
|
799 String name = new String(buf, index, m, "UTF-8"); |
|
800 index += m; |
|
801 m = buf[index++]; |
|
802 String realName = new String(buf, index, m, "UTF-8"); |
|
803 index += m; |
|
804 aliases.put(name, realName); |
|
805 } |
|
806 } |
|
807 break loop; |
|
808 |
|
809 default: |
|
810 index += len; |
|
811 break; |
|
812 } |
|
813 } |
|
814 } catch (Exception e) { |
|
815 System.err.println("ZoneInfoOld: corrupted " + JAVAZM_FILE_NAME); |
|
816 return null; |
|
817 } |
|
818 return aliases; |
|
819 } |
|
820 |
|
821 private volatile static SoftReference<List<String>> excludedIDs = null; |
|
822 private volatile static boolean hasNoExcludeList = false; |
|
823 |
|
824 /** |
|
825 * @return a List of zone IDs for zones that will change their GMT |
|
826 * offsets in some future time. |
|
827 * |
|
828 * @since 1.6 |
|
829 */ |
|
830 static List<String> getExcludedZones() { |
|
831 if (hasNoExcludeList) { |
|
832 return null; |
|
833 } |
|
834 |
|
835 List<String> excludeList = null; |
|
836 |
|
837 SoftReference<List<String>> cache = excludedIDs; |
|
838 if (cache != null) { |
|
839 excludeList = cache.get(); |
|
840 if (excludeList != null) { |
|
841 return excludeList; |
|
842 } |
|
843 } |
|
844 |
|
845 byte[] buf = getZoneInfoOldMappings(); |
|
846 int index = JAVAZM_LABEL_LENGTH + 1; |
|
847 int filesize = buf.length; |
|
848 |
|
849 try { |
|
850 loop: |
|
851 while (index < filesize) { |
|
852 byte tag = buf[index++]; |
|
853 int len = ((buf[index++] & 0xFF) << 8) + (buf[index++] & 0xFF); |
|
854 |
|
855 switch (tag) { |
|
856 case TAG_ExcludedZones: |
|
857 { |
|
858 int n = (buf[index++] << 8) + (buf[index++] & 0xFF); |
|
859 excludeList = new ArrayList<>(); |
|
860 for (int i = 0; i < n; i++) { |
|
861 byte m = buf[index++]; |
|
862 String name = new String(buf, index, m, "UTF-8"); |
|
863 index += m; |
|
864 excludeList.add(name); |
|
865 } |
|
866 } |
|
867 break loop; |
|
868 |
|
869 default: |
|
870 index += len; |
|
871 break; |
|
872 } |
|
873 } |
|
874 } catch (Exception e) { |
|
875 System.err.println("ZoneInfoOld: corrupted " + JAVAZM_FILE_NAME); |
|
876 return null; |
|
877 } |
|
878 |
|
879 if (excludeList != null) { |
|
880 excludedIDs = new SoftReference<>(excludeList); |
|
881 } else { |
|
882 hasNoExcludeList = true; |
|
883 } |
|
884 return excludeList; |
|
885 } |
|
886 |
|
887 private volatile static SoftReference<byte[]> rawOffsetIndices = null; |
|
888 |
|
889 static byte[] getRawOffsetIndices() { |
|
890 byte[] indices = null; |
|
891 |
|
892 SoftReference<byte[]> cache = rawOffsetIndices; |
|
893 if (cache != null) { |
|
894 indices = cache.get(); |
|
895 if (indices != null) { |
|
896 return indices; |
|
897 } |
|
898 } |
|
899 |
|
900 byte[] buf = getZoneInfoOldMappings(); |
|
901 int index = JAVAZM_LABEL_LENGTH + 1; |
|
902 int filesize = buf.length; |
|
903 |
|
904 try { |
|
905 loop: |
|
906 while (index < filesize) { |
|
907 byte tag = buf[index++]; |
|
908 int len = ((buf[index++] & 0xFF) << 8) + (buf[index++] & 0xFF); |
|
909 |
|
910 switch (tag) { |
|
911 case TAG_RawOffsetIndices: |
|
912 { |
|
913 indices = new byte[len]; |
|
914 for (int i = 0; i < len; i++) { |
|
915 indices[i] = buf[index++]; |
|
916 } |
|
917 } |
|
918 break loop; |
|
919 |
|
920 default: |
|
921 index += len; |
|
922 break; |
|
923 } |
|
924 } |
|
925 } catch (ArrayIndexOutOfBoundsException e) { |
|
926 System.err.println("ZoneInfoOld: corrupted " + JAVAZM_FILE_NAME); |
|
927 } |
|
928 |
|
929 rawOffsetIndices = new SoftReference<>(indices); |
|
930 return indices; |
|
931 } |
|
932 |
|
933 private volatile static SoftReference<int[]> rawOffsets = null; |
|
934 |
|
935 static int[] getRawOffsets() { |
|
936 int[] offsets = null; |
|
937 |
|
938 SoftReference<int[]> cache = rawOffsets; |
|
939 if (cache != null) { |
|
940 offsets = cache.get(); |
|
941 if (offsets != null) { |
|
942 return offsets; |
|
943 } |
|
944 } |
|
945 |
|
946 byte[] buf = getZoneInfoOldMappings(); |
|
947 int index = JAVAZM_LABEL_LENGTH + 1; |
|
948 int filesize = buf.length; |
|
949 |
|
950 try { |
|
951 loop: |
|
952 while (index < filesize) { |
|
953 byte tag = buf[index++]; |
|
954 int len = ((buf[index++] & 0xFF) << 8) + (buf[index++] & 0xFF); |
|
955 |
|
956 switch (tag) { |
|
957 case TAG_RawOffsets: |
|
958 { |
|
959 int n = len/4; |
|
960 offsets = new int[n]; |
|
961 for (int i = 0; i < n; i++) { |
|
962 int val = buf[index++] & 0xff; |
|
963 val = (val << 8) + (buf[index++] & 0xff); |
|
964 val = (val << 8) + (buf[index++] & 0xff); |
|
965 val = (val << 8) + (buf[index++] & 0xff); |
|
966 offsets[i] = val; |
|
967 } |
|
968 } |
|
969 break loop; |
|
970 |
|
971 default: |
|
972 index += len; |
|
973 break; |
|
974 } |
|
975 } |
|
976 } catch (ArrayIndexOutOfBoundsException e) { |
|
977 System.err.println("ZoneInfoOld: corrupted " + JAVAZM_FILE_NAME); |
|
978 } |
|
979 |
|
980 rawOffsets = new SoftReference<>(offsets); |
|
981 return offsets; |
|
982 } |
|
983 |
|
984 private volatile static SoftReference<byte[]> zoneInfoMappings = null; |
|
985 |
|
986 private static byte[] getZoneInfoOldMappings() { |
|
987 byte[] data; |
|
988 SoftReference<byte[]> cache = zoneInfoMappings; |
|
989 if (cache != null) { |
|
990 data = cache.get(); |
|
991 if (data != null) { |
|
992 return data; |
|
993 } |
|
994 } |
|
995 data = readZoneInfoFile(JAVAZM_FILE_NAME); |
|
996 if (data == null) { |
|
997 throw new RuntimeException("ZoneInfoOldMapping " + |
|
998 JAVAZM_FILE_NAME + " either doesn't exist or doesn't have data"); |
|
999 } |
|
1000 |
|
1001 int index; |
|
1002 for (index = 0; index < JAVAZM_LABEL.length; index++) { |
|
1003 if (data[index] != JAVAZM_LABEL[index]) { |
|
1004 System.err.println("ZoneInfoOld: wrong magic number: " + JAVAZM_FILE_NAME); |
|
1005 return null; |
|
1006 } |
|
1007 } |
|
1008 if (data[index++] > JAVAZM_VERSION) { |
|
1009 System.err.println("ZoneInfoOld: incompatible version (" |
|
1010 + data[index - 1] + "): " + JAVAZM_FILE_NAME); |
|
1011 return null; |
|
1012 } |
|
1013 |
|
1014 zoneInfoMappings = new SoftReference<>(data); |
|
1015 return data; |
|
1016 } |
|
1017 |
|
1018 /** |
|
1019 * Reads the specified file under <java.home>/lib/zi into a buffer. |
|
1020 * @return the buffer, or null if any I/O error occurred. |
|
1021 */ |
|
1022 private static byte[] readZoneInfoFile(final String fileName) { |
|
1023 if (fileName.indexOf("..") >= 0) { |
|
1024 return null; |
|
1025 } |
|
1026 byte[] buffer = null; |
|
1027 File file = new File(ziDir, fileName); |
|
1028 try { |
|
1029 int filesize = (int)file.length(); |
|
1030 if (filesize > 0) { |
|
1031 FileInputStream fis = new FileInputStream(file); |
|
1032 buffer = new byte[filesize]; |
|
1033 try { |
|
1034 if (fis.read(buffer) != filesize) { |
|
1035 throw new IOException("read error on " + fileName); |
|
1036 } |
|
1037 } finally { |
|
1038 fis.close(); |
|
1039 } |
|
1040 } |
|
1041 } catch (Exception ex) { |
|
1042 if (!(ex instanceof FileNotFoundException) || JAVAZM_FILE_NAME.equals(fileName)) { |
|
1043 System.err.println("ZoneInfoOld: " + ex.getMessage()); |
|
1044 } |
|
1045 } |
|
1046 return buffer; |
|
1047 } |
|
1048 |
|
1049 private ZoneInfoFile() { |
|
1050 } |
|
1051 } |