| /**************************************************************** |
| * Licensed to the Apache Software Foundation (ASF) under one * |
| * or more contributor license agreements. See the NOTICE file * |
| * distributed with this work for additional information * |
| * regarding copyright ownership. The ASF licenses this file * |
| * to you under the Apache License, Version 2.0 (the * |
| * "License"); you may not use this file except in compliance * |
| * with the License. You may obtain a copy of the License at * |
| * * |
| * http://www.apache.org/licenses/LICENSE-2.0 * |
| * * |
| * Unless required by applicable law or agreed to in writing, * |
| * software distributed under the License is distributed on an * |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * |
| * KIND, either express or implied. See the License for the * |
| * specific language governing permissions and limitations * |
| * under the License. * |
| ****************************************************************/ |
| |
| package org.apache.james.mime4j.util; |
| |
| import java.io.UnsupportedEncodingException; |
| import java.nio.charset.IllegalCharsetNameException; |
| import java.nio.charset.UnsupportedCharsetException; |
| import java.util.HashMap; |
| import java.util.Locale; |
| import java.util.TreeSet; |
| |
| //BEGIN android-changed: Stubbing out logging |
| import org.apache.james.mime4j.Log; |
| import org.apache.james.mime4j.LogFactory; |
| //END android-changed |
| |
| /** |
| * Utility class for working with character sets. It is somewhat similar to |
| * the Java 1.4 <code>java.nio.charset.Charset</code> class but knows many |
| * more aliases and is compatible with Java 1.3. It will use a simple detection |
| * mechanism to detect what character sets the current VM supports. This will |
| * be a sub-set of the character sets listed in the |
| * <a href="http://java.sun.com/j2se/1.5.0/docs/guide/intl/encoding.doc.html"> |
| * Java 1.5 (J2SE5.0) Supported Encodings</a> document. |
| * <p> |
| * The <a href="http://www.iana.org/assignments/character-sets"> |
| * IANA Character Sets</a> document has been used to determine the preferred |
| * MIME character set names and to get a list of known aliases. |
| * <p> |
| * This is a complete list of the character sets known to this class: |
| * <table> |
| * <tr> |
| * <td>Canonical (Java) name</td> |
| * <td>MIME preferred</td> |
| * <td>Aliases</td> |
| * </tr> |
| * <tr> |
| * <td>ASCII</td> |
| * <td>US-ASCII</td> |
| * <td>ANSI_X3.4-1968 iso-ir-6 ANSI_X3.4-1986 ISO_646.irv:1991 ISO646-US us IBM367 cp367 csASCII ascii7 646 iso_646.irv:1983 </td> |
| * </tr> |
| * <tr> |
| * <td>Big5</td> |
| * <td>Big5</td> |
| * <td>csBig5 CN-Big5 BIG-FIVE BIGFIVE </td> |
| * </tr> |
| * <tr> |
| * <td>Big5_HKSCS</td> |
| * <td>Big5-HKSCS</td> |
| * <td>big5hkscs </td> |
| * </tr> |
| * <tr> |
| * <td>Big5_Solaris</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp037</td> |
| * <td>IBM037</td> |
| * <td>ebcdic-cp-us ebcdic-cp-ca ebcdic-cp-wt ebcdic-cp-nl csIBM037 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp1006</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1025</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1026</td> |
| * <td>IBM1026</td> |
| * <td>csIBM1026 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp1046</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1047</td> |
| * <td>IBM1047</td> |
| * <td>IBM-1047 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp1097</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1098</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1112</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1122</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1123</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1124</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1140</td> |
| * <td>IBM01140</td> |
| * <td>CCSID01140 CP01140 ebcdic-us-37+euro </td> |
| * </tr> |
| * <tr> |
| * <td>Cp1141</td> |
| * <td>IBM01141</td> |
| * <td>CCSID01141 CP01141 ebcdic-de-273+euro </td> |
| * </tr> |
| * <tr> |
| * <td>Cp1142</td> |
| * <td>IBM01142</td> |
| * <td>CCSID01142 CP01142 ebcdic-dk-277+euro ebcdic-no-277+euro </td> |
| * </tr> |
| * <tr> |
| * <td>Cp1143</td> |
| * <td>IBM01143</td> |
| * <td>CCSID01143 CP01143 ebcdic-fi-278+euro ebcdic-se-278+euro </td> |
| * </tr> |
| * <tr> |
| * <td>Cp1144</td> |
| * <td>IBM01144</td> |
| * <td>CCSID01144 CP01144 ebcdic-it-280+euro </td> |
| * </tr> |
| * <tr> |
| * <td>Cp1145</td> |
| * <td>IBM01145</td> |
| * <td>CCSID01145 CP01145 ebcdic-es-284+euro </td> |
| * </tr> |
| * <tr> |
| * <td>Cp1146</td> |
| * <td>IBM01146</td> |
| * <td>CCSID01146 CP01146 ebcdic-gb-285+euro </td> |
| * </tr> |
| * <tr> |
| * <td>Cp1147</td> |
| * <td>IBM01147</td> |
| * <td>CCSID01147 CP01147 ebcdic-fr-297+euro </td> |
| * </tr> |
| * <tr> |
| * <td>Cp1148</td> |
| * <td>IBM01148</td> |
| * <td>CCSID01148 CP01148 ebcdic-international-500+euro </td> |
| * </tr> |
| * <tr> |
| * <td>Cp1149</td> |
| * <td>IBM01149</td> |
| * <td>CCSID01149 CP01149 ebcdic-is-871+euro </td> |
| * </tr> |
| * <tr> |
| * <td>Cp1250</td> |
| * <td>windows-1250</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1251</td> |
| * <td>windows-1251</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1252</td> |
| * <td>windows-1252</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1253</td> |
| * <td>windows-1253</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1254</td> |
| * <td>windows-1254</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1255</td> |
| * <td>windows-1255</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1256</td> |
| * <td>windows-1256</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1257</td> |
| * <td>windows-1257</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1258</td> |
| * <td>windows-1258</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1381</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp1383</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp273</td> |
| * <td>IBM273</td> |
| * <td>csIBM273 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp277</td> |
| * <td>IBM277</td> |
| * <td>EBCDIC-CP-DK EBCDIC-CP-NO csIBM277 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp278</td> |
| * <td>IBM278</td> |
| * <td>CP278 ebcdic-cp-fi ebcdic-cp-se csIBM278 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp280</td> |
| * <td>IBM280</td> |
| * <td>ebcdic-cp-it csIBM280 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp284</td> |
| * <td>IBM284</td> |
| * <td>ebcdic-cp-es csIBM284 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp285</td> |
| * <td>IBM285</td> |
| * <td>ebcdic-cp-gb csIBM285 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp297</td> |
| * <td>IBM297</td> |
| * <td>ebcdic-cp-fr csIBM297 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp33722</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp420</td> |
| * <td>IBM420</td> |
| * <td>ebcdic-cp-ar1 csIBM420 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp424</td> |
| * <td>IBM424</td> |
| * <td>ebcdic-cp-he csIBM424 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp437</td> |
| * <td>IBM437</td> |
| * <td>437 csPC8CodePage437 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp500</td> |
| * <td>IBM500</td> |
| * <td>ebcdic-cp-be ebcdic-cp-ch csIBM500 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp737</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp775</td> |
| * <td>IBM775</td> |
| * <td>csPC775Baltic </td> |
| * </tr> |
| * <tr> |
| * <td>Cp838</td> |
| * <td>IBM-Thai</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp850</td> |
| * <td>IBM850</td> |
| * <td>850 csPC850Multilingual </td> |
| * </tr> |
| * <tr> |
| * <td>Cp852</td> |
| * <td>IBM852</td> |
| * <td>852 csPCp852 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp855</td> |
| * <td>IBM855</td> |
| * <td>855 csIBM855 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp856</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp857</td> |
| * <td>IBM857</td> |
| * <td>857 csIBM857 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp858</td> |
| * <td>IBM00858</td> |
| * <td>CCSID00858 CP00858 PC-Multilingual-850+euro </td> |
| * </tr> |
| * <tr> |
| * <td>Cp860</td> |
| * <td>IBM860</td> |
| * <td>860 csIBM860 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp861</td> |
| * <td>IBM861</td> |
| * <td>861 cp-is csIBM861 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp862</td> |
| * <td>IBM862</td> |
| * <td>862 csPC862LatinHebrew </td> |
| * </tr> |
| * <tr> |
| * <td>Cp863</td> |
| * <td>IBM863</td> |
| * <td>863 csIBM863 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp864</td> |
| * <td>IBM864</td> |
| * <td>cp864 csIBM864 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp865</td> |
| * <td>IBM865</td> |
| * <td>865 csIBM865 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp866</td> |
| * <td>IBM866</td> |
| * <td>866 csIBM866 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp868</td> |
| * <td>IBM868</td> |
| * <td>cp-ar csIBM868 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp869</td> |
| * <td>IBM869</td> |
| * <td>cp-gr csIBM869 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp870</td> |
| * <td>IBM870</td> |
| * <td>ebcdic-cp-roece ebcdic-cp-yu csIBM870 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp871</td> |
| * <td>IBM871</td> |
| * <td>ebcdic-cp-is csIBM871 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp875</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp918</td> |
| * <td>IBM918</td> |
| * <td>ebcdic-cp-ar2 csIBM918 </td> |
| * </tr> |
| * <tr> |
| * <td>Cp921</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp922</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp930</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp933</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp935</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp937</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp939</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp942</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp942C</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp943</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp943C</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp948</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp949</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp949C</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp950</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp964</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>Cp970</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>EUC_CN</td> |
| * <td>GB2312</td> |
| * <td>x-EUC-CN csGB2312 euccn euc-cn gb2312-80 gb2312-1980 CN-GB CN-GB-ISOIR165 </td> |
| * </tr> |
| * <tr> |
| * <td>EUC_JP</td> |
| * <td>EUC-JP</td> |
| * <td>csEUCPkdFmtJapanese Extended_UNIX_Code_Packed_Format_for_Japanese eucjis x-eucjp eucjp x-euc-jp </td> |
| * </tr> |
| * <tr> |
| * <td>EUC_JP_LINUX</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>EUC_JP_Solaris</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>EUC_KR</td> |
| * <td>EUC-KR</td> |
| * <td>csEUCKR ksc5601 5601 ksc5601_1987 ksc_5601 ksc5601-1987 ks_c_5601-1987 euckr </td> |
| * </tr> |
| * <tr> |
| * <td>EUC_TW</td> |
| * <td>EUC-TW</td> |
| * <td>x-EUC-TW cns11643 euctw </td> |
| * </tr> |
| * <tr> |
| * <td>GB18030</td> |
| * <td>GB18030</td> |
| * <td>gb18030-2000 </td> |
| * </tr> |
| * <tr> |
| * <td>GBK</td> |
| * <td>windows-936</td> |
| * <td>CP936 MS936 ms_936 x-mswin-936 </td> |
| * </tr> |
| * <tr> |
| * <td>ISCII91</td> |
| * <td>?</td> |
| * <td>x-ISCII91 iscii </td> |
| * </tr> |
| * <tr> |
| * <td>ISO2022CN</td> |
| * <td>ISO-2022-CN</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>ISO2022JP</td> |
| * <td>ISO-2022-JP</td> |
| * <td>csISO2022JP JIS jis_encoding csjisencoding </td> |
| * </tr> |
| * <tr> |
| * <td>ISO2022KR</td> |
| * <td>ISO-2022-KR</td> |
| * <td>csISO2022KR </td> |
| * </tr> |
| * <tr> |
| * <td>ISO2022_CN_CNS</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>ISO2022_CN_GB</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>ISO8859_1</td> |
| * <td>ISO-8859-1</td> |
| * <td>ISO_8859-1:1987 iso-ir-100 ISO_8859-1 latin1 l1 IBM819 CP819 csISOLatin1 8859_1 819 IBM-819 ISO8859-1 ISO_8859_1 </td> |
| * </tr> |
| * <tr> |
| * <td>ISO8859_13</td> |
| * <td>ISO-8859-13</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>ISO8859_15</td> |
| * <td>ISO-8859-15</td> |
| * <td>ISO_8859-15 Latin-9 8859_15 csISOlatin9 IBM923 cp923 923 L9 IBM-923 ISO8859-15 LATIN9 LATIN0 csISOlatin0 ISO8859_15_FDIS </td> |
| * </tr> |
| * <tr> |
| * <td>ISO8859_2</td> |
| * <td>ISO-8859-2</td> |
| * <td>ISO_8859-2:1987 iso-ir-101 ISO_8859-2 latin2 l2 csISOLatin2 8859_2 iso8859_2 </td> |
| * </tr> |
| * <tr> |
| * <td>ISO8859_3</td> |
| * <td>ISO-8859-3</td> |
| * <td>ISO_8859-3:1988 iso-ir-109 ISO_8859-3 latin3 l3 csISOLatin3 8859_3 </td> |
| * </tr> |
| * <tr> |
| * <td>ISO8859_4</td> |
| * <td>ISO-8859-4</td> |
| * <td>ISO_8859-4:1988 iso-ir-110 ISO_8859-4 latin4 l4 csISOLatin4 8859_4 </td> |
| * </tr> |
| * <tr> |
| * <td>ISO8859_5</td> |
| * <td>ISO-8859-5</td> |
| * <td>ISO_8859-5:1988 iso-ir-144 ISO_8859-5 cyrillic csISOLatinCyrillic 8859_5 </td> |
| * </tr> |
| * <tr> |
| * <td>ISO8859_6</td> |
| * <td>ISO-8859-6</td> |
| * <td>ISO_8859-6:1987 iso-ir-127 ISO_8859-6 ECMA-114 ASMO-708 arabic csISOLatinArabic 8859_6 </td> |
| * </tr> |
| * <tr> |
| * <td>ISO8859_7</td> |
| * <td>ISO-8859-7</td> |
| * <td>ISO_8859-7:1987 iso-ir-126 ISO_8859-7 ELOT_928 ECMA-118 greek greek8 csISOLatinGreek 8859_7 sun_eu_greek </td> |
| * </tr> |
| * <tr> |
| * <td>ISO8859_8</td> |
| * <td>ISO-8859-8</td> |
| * <td>ISO_8859-8:1988 iso-ir-138 ISO_8859-8 hebrew csISOLatinHebrew 8859_8 </td> |
| * </tr> |
| * <tr> |
| * <td>ISO8859_9</td> |
| * <td>ISO-8859-9</td> |
| * <td>ISO_8859-9:1989 iso-ir-148 ISO_8859-9 latin5 l5 csISOLatin5 8859_9 </td> |
| * </tr> |
| * <tr> |
| * <td>JISAutoDetect</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>JIS_C6626-1983</td> |
| * <td>JIS_C6626-1983</td> |
| * <td>x-JIS0208 JIS0208 csISO87JISX0208 x0208 JIS_X0208-1983 iso-ir-87 </td> |
| * </tr> |
| * <tr> |
| * <td>JIS_X0201</td> |
| * <td>JIS_X0201</td> |
| * <td>X0201 JIS0201 csHalfWidthKatakana </td> |
| * </tr> |
| * <tr> |
| * <td>JIS_X0212-1990</td> |
| * <td>JIS_X0212-1990</td> |
| * <td>iso-ir-159 x0212 JIS0212 csISO159JISX02121990 </td> |
| * </tr> |
| * <tr> |
| * <td>KOI8_R</td> |
| * <td>KOI8-R</td> |
| * <td>csKOI8R koi8 </td> |
| * </tr> |
| * <tr> |
| * <td>MS874</td> |
| * <td>windows-874</td> |
| * <td>cp874 </td> |
| * </tr> |
| * <tr> |
| * <td>MS932</td> |
| * <td>Windows-31J</td> |
| * <td>windows-932 csWindows31J x-ms-cp932 </td> |
| * </tr> |
| * <tr> |
| * <td>MS949</td> |
| * <td>windows-949</td> |
| * <td>windows949 ms_949 x-windows-949 </td> |
| * </tr> |
| * <tr> |
| * <td>MS950</td> |
| * <td>windows-950</td> |
| * <td>x-windows-950 </td> |
| * </tr> |
| * <tr> |
| * <td>MS950_HKSCS</td> |
| * <td></td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>MacArabic</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>MacCentralEurope</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>MacCroatian</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>MacCyrillic</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>MacDingbat</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>MacGreek</td> |
| * <td>MacGreek</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>MacHebrew</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>MacIceland</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>MacRoman</td> |
| * <td>MacRoman</td> |
| * <td>Macintosh MAC csMacintosh </td> |
| * </tr> |
| * <tr> |
| * <td>MacRomania</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>MacSymbol</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>MacThai</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>MacTurkish</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>MacUkraine</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>SJIS</td> |
| * <td>Shift_JIS</td> |
| * <td>MS_Kanji csShiftJIS shift-jis x-sjis pck </td> |
| * </tr> |
| * <tr> |
| * <td>TIS620</td> |
| * <td>TIS-620</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>UTF-16</td> |
| * <td>UTF-16</td> |
| * <td>UTF_16 </td> |
| * </tr> |
| * <tr> |
| * <td>UTF8</td> |
| * <td>UTF-8</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>UnicodeBig</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>UnicodeBigUnmarked</td> |
| * <td>UTF-16BE</td> |
| * <td>X-UTF-16BE UTF_16BE ISO-10646-UCS-2 </td> |
| * </tr> |
| * <tr> |
| * <td>UnicodeLittle</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * <tr> |
| * <td>UnicodeLittleUnmarked</td> |
| * <td>UTF-16LE</td> |
| * <td>UTF_16LE X-UTF-16LE </td> |
| * </tr> |
| * <tr> |
| * <td>x-Johab</td> |
| * <td>johab</td> |
| * <td>johab cp1361 ms1361 ksc5601-1992 ksc5601_1992 </td> |
| * </tr> |
| * <tr> |
| * <td>x-iso-8859-11</td> |
| * <td>?</td> |
| * <td></td> |
| * </tr> |
| * </table> |
| * |
| * |
| * @version $Id: CharsetUtil.java,v 1.1 2004/10/25 07:26:46 ntherning Exp $ |
| */ |
| public class CharsetUtil { |
| private static Log log = LogFactory.getLog(CharsetUtil.class); |
| |
| private static class Charset implements Comparable<Charset> { |
| private String canonical = null; |
| private String mime = null; |
| private String[] aliases = null; |
| |
| private Charset(String canonical, String mime, String[] aliases) { |
| this.canonical = canonical; |
| this.mime = mime; |
| this.aliases = aliases; |
| } |
| |
| public int compareTo(Charset c) { |
| return this.canonical.compareTo(c.canonical); |
| } |
| } |
| |
| private static Charset[] JAVA_CHARSETS = { |
| new Charset("ISO8859_1", "ISO-8859-1", |
| new String[] {"ISO_8859-1:1987", "iso-ir-100", "ISO_8859-1", |
| "latin1", "l1", "IBM819", "CP819", |
| "csISOLatin1", "8859_1", "819", "IBM-819", |
| "ISO8859-1", "ISO_8859_1"}), |
| new Charset("ISO8859_2", "ISO-8859-2", |
| new String[] {"ISO_8859-2:1987", "iso-ir-101", "ISO_8859-2", |
| "latin2", "l2", "csISOLatin2", "8859_2", |
| "iso8859_2"}), |
| new Charset("ISO8859_3", "ISO-8859-3", new String[] {"ISO_8859-3:1988", "iso-ir-109", "ISO_8859-3", "latin3", "l3", "csISOLatin3", "8859_3"}), |
| new Charset("ISO8859_4", "ISO-8859-4", |
| new String[] {"ISO_8859-4:1988", "iso-ir-110", "ISO_8859-4", |
| "latin4", "l4", "csISOLatin4", "8859_4"}), |
| new Charset("ISO8859_5", "ISO-8859-5", |
| new String[] {"ISO_8859-5:1988", "iso-ir-144", "ISO_8859-5", |
| "cyrillic", "csISOLatinCyrillic", "8859_5"}), |
| new Charset("ISO8859_6", "ISO-8859-6", new String[] {"ISO_8859-6:1987", "iso-ir-127", "ISO_8859-6", "ECMA-114", "ASMO-708", "arabic", "csISOLatinArabic", "8859_6"}), |
| new Charset("ISO8859_7", "ISO-8859-7", |
| new String[] {"ISO_8859-7:1987", "iso-ir-126", "ISO_8859-7", |
| "ELOT_928", "ECMA-118", "greek", "greek8", |
| "csISOLatinGreek", "8859_7", "sun_eu_greek"}), |
| new Charset("ISO8859_8", "ISO-8859-8", new String[] {"ISO_8859-8:1988", "iso-ir-138", "ISO_8859-8", "hebrew", "csISOLatinHebrew", "8859_8"}), |
| new Charset("ISO8859_9", "ISO-8859-9", |
| new String[] {"ISO_8859-9:1989", "iso-ir-148", "ISO_8859-9", |
| "latin5", "l5", "csISOLatin5", "8859_9"}), |
| |
| new Charset("ISO8859_13", "ISO-8859-13", new String[] {}), |
| new Charset("ISO8859_15", "ISO-8859-15", |
| new String[] {"ISO_8859-15", "Latin-9", "8859_15", |
| "csISOlatin9", "IBM923", "cp923", "923", "L9", |
| "IBM-923", "ISO8859-15", "LATIN9", "LATIN0", |
| "csISOlatin0", "ISO8859_15_FDIS"}), |
| new Charset("KOI8_R", "KOI8-R", new String[] {"csKOI8R", "koi8"}), |
| new Charset("ASCII", "US-ASCII", |
| new String[] {"ANSI_X3.4-1968", "iso-ir-6", |
| "ANSI_X3.4-1986", "ISO_646.irv:1991", |
| "ISO646-US", "us", "IBM367", "cp367", |
| "csASCII", "ascii7", "646", "iso_646.irv:1983"}), |
| new Charset("UTF8", "UTF-8", new String[] {}), |
| new Charset("UTF-16", "UTF-16", new String[] {"UTF_16"}), |
| new Charset("UnicodeBigUnmarked", "UTF-16BE", new String[] {"X-UTF-16BE", "UTF_16BE", "ISO-10646-UCS-2"}), |
| new Charset("UnicodeLittleUnmarked", "UTF-16LE", new String[] {"UTF_16LE", "X-UTF-16LE"}), |
| new Charset("Big5", "Big5", new String[] {"csBig5", "CN-Big5", "BIG-FIVE", "BIGFIVE"}), |
| new Charset("Big5_HKSCS", "Big5-HKSCS", new String[] {"big5hkscs"}), |
| new Charset("EUC_JP", "EUC-JP", |
| new String[] {"csEUCPkdFmtJapanese", |
| "Extended_UNIX_Code_Packed_Format_for_Japanese", |
| "eucjis", "x-eucjp", "eucjp", "x-euc-jp"}), |
| new Charset("EUC_KR", "EUC-KR", |
| new String[] {"csEUCKR", "ksc5601", "5601", "ksc5601_1987", |
| "ksc_5601", "ksc5601-1987", "ks_c_5601-1987", |
| "euckr"}), |
| new Charset("GB18030", "GB18030", new String[] {"gb18030-2000"}), |
| new Charset("EUC_CN", "GB2312", new String[] {"x-EUC-CN", "csGB2312", "euccn", "euc-cn", "gb2312-80", "gb2312-1980", "CN-GB", "CN-GB-ISOIR165"}), |
| new Charset("GBK", "windows-936", new String[] {"CP936", "MS936", "ms_936", "x-mswin-936"}), |
| |
| new Charset("Cp037", "IBM037", new String[] {"ebcdic-cp-us", "ebcdic-cp-ca", "ebcdic-cp-wt", "ebcdic-cp-nl", "csIBM037"}), |
| new Charset("Cp273", "IBM273", new String[] {"csIBM273"}), |
| new Charset("Cp277", "IBM277", new String[] {"EBCDIC-CP-DK", "EBCDIC-CP-NO", "csIBM277"}), |
| new Charset("Cp278", "IBM278", new String[] {"CP278", "ebcdic-cp-fi", "ebcdic-cp-se", "csIBM278"}), |
| new Charset("Cp280", "IBM280", new String[] {"ebcdic-cp-it", "csIBM280"}), |
| new Charset("Cp284", "IBM284", new String[] {"ebcdic-cp-es", "csIBM284"}), |
| new Charset("Cp285", "IBM285", new String[] {"ebcdic-cp-gb", "csIBM285"}), |
| new Charset("Cp297", "IBM297", new String[] {"ebcdic-cp-fr", "csIBM297"}), |
| new Charset("Cp420", "IBM420", new String[] {"ebcdic-cp-ar1", "csIBM420"}), |
| new Charset("Cp424", "IBM424", new String[] {"ebcdic-cp-he", "csIBM424"}), |
| new Charset("Cp437", "IBM437", new String[] {"437", "csPC8CodePage437"}), |
| new Charset("Cp500", "IBM500", new String[] {"ebcdic-cp-be", "ebcdic-cp-ch", "csIBM500"}), |
| new Charset("Cp775", "IBM775", new String[] {"csPC775Baltic"}), |
| new Charset("Cp838", "IBM-Thai", new String[] {}), |
| new Charset("Cp850", "IBM850", new String[] {"850", "csPC850Multilingual"}), |
| new Charset("Cp852", "IBM852", new String[] {"852", "csPCp852"}), |
| new Charset("Cp855", "IBM855", new String[] {"855", "csIBM855"}), |
| new Charset("Cp857", "IBM857", new String[] {"857", "csIBM857"}), |
| new Charset("Cp858", "IBM00858", |
| new String[] {"CCSID00858", "CP00858", |
| "PC-Multilingual-850+euro"}), |
| new Charset("Cp860", "IBM860", new String[] {"860", "csIBM860"}), |
| new Charset("Cp861", "IBM861", new String[] {"861", "cp-is", "csIBM861"}), |
| new Charset("Cp862", "IBM862", new String[] {"862", "csPC862LatinHebrew"}), |
| new Charset("Cp863", "IBM863", new String[] {"863", "csIBM863"}), |
| new Charset("Cp864", "IBM864", new String[] {"cp864", "csIBM864"}), |
| new Charset("Cp865", "IBM865", new String[] {"865", "csIBM865"}), |
| new Charset("Cp866", "IBM866", new String[] {"866", "csIBM866"}), |
| new Charset("Cp868", "IBM868", new String[] {"cp-ar", "csIBM868"}), |
| new Charset("Cp869", "IBM869", new String[] {"cp-gr", "csIBM869"}), |
| new Charset("Cp870", "IBM870", new String[] {"ebcdic-cp-roece", "ebcdic-cp-yu", "csIBM870"}), |
| new Charset("Cp871", "IBM871", new String[] {"ebcdic-cp-is", "csIBM871"}), |
| new Charset("Cp918", "IBM918", new String[] {"ebcdic-cp-ar2", "csIBM918"}), |
| new Charset("Cp1026", "IBM1026", new String[] {"csIBM1026"}), |
| new Charset("Cp1047", "IBM1047", new String[] {"IBM-1047"}), |
| new Charset("Cp1140", "IBM01140", |
| new String[] {"CCSID01140", "CP01140", |
| "ebcdic-us-37+euro"}), |
| new Charset("Cp1141", "IBM01141", |
| new String[] {"CCSID01141", "CP01141", |
| "ebcdic-de-273+euro"}), |
| new Charset("Cp1142", "IBM01142", new String[] {"CCSID01142", "CP01142", "ebcdic-dk-277+euro", "ebcdic-no-277+euro"}), |
| new Charset("Cp1143", "IBM01143", new String[] {"CCSID01143", "CP01143", "ebcdic-fi-278+euro", "ebcdic-se-278+euro"}), |
| new Charset("Cp1144", "IBM01144", new String[] {"CCSID01144", "CP01144", "ebcdic-it-280+euro"}), |
| new Charset("Cp1145", "IBM01145", new String[] {"CCSID01145", "CP01145", "ebcdic-es-284+euro"}), |
| new Charset("Cp1146", "IBM01146", new String[] {"CCSID01146", "CP01146", "ebcdic-gb-285+euro"}), |
| new Charset("Cp1147", "IBM01147", new String[] {"CCSID01147", "CP01147", "ebcdic-fr-297+euro"}), |
| new Charset("Cp1148", "IBM01148", new String[] {"CCSID01148", "CP01148", "ebcdic-international-500+euro"}), |
| new Charset("Cp1149", "IBM01149", new String[] {"CCSID01149", "CP01149", "ebcdic-is-871+euro"}), |
| new Charset("Cp1250", "windows-1250", new String[] {}), |
| new Charset("Cp1251", "windows-1251", new String[] {}), |
| new Charset("Cp1252", "windows-1252", new String[] {}), |
| new Charset("Cp1253", "windows-1253", new String[] {}), |
| new Charset("Cp1254", "windows-1254", new String[] {}), |
| new Charset("Cp1255", "windows-1255", new String[] {}), |
| new Charset("Cp1256", "windows-1256", new String[] {}), |
| new Charset("Cp1257", "windows-1257", new String[] {}), |
| new Charset("Cp1258", "windows-1258", new String[] {}), |
| new Charset("ISO2022CN", "ISO-2022-CN", new String[] {}), |
| new Charset("ISO2022JP", "ISO-2022-JP", new String[] {"csISO2022JP", "JIS", "jis_encoding", "csjisencoding"}), |
| new Charset("ISO2022KR", "ISO-2022-KR", new String[] {"csISO2022KR"}), |
| new Charset("JIS_X0201", "JIS_X0201", new String[] {"X0201", "JIS0201", "csHalfWidthKatakana"}), |
| new Charset("JIS_X0212-1990", "JIS_X0212-1990", new String[] {"iso-ir-159", "x0212", "JIS0212", "csISO159JISX02121990"}), |
| new Charset("JIS_C6626-1983", "JIS_C6626-1983", new String[] {"x-JIS0208", "JIS0208", "csISO87JISX0208", "x0208", "JIS_X0208-1983", "iso-ir-87"}), |
| new Charset("SJIS", "Shift_JIS", new String[] {"MS_Kanji", "csShiftJIS", "shift-jis", "x-sjis", "pck"}), |
| new Charset("TIS620", "TIS-620", new String[] {}), |
| new Charset("MS932", "Windows-31J", new String[] {"windows-932", "csWindows31J", "x-ms-cp932"}), |
| new Charset("EUC_TW", "EUC-TW", new String[] {"x-EUC-TW", "cns11643", "euctw"}), |
| new Charset("x-Johab", "johab", new String[] {"johab", "cp1361", "ms1361", "ksc5601-1992", "ksc5601_1992"}), |
| new Charset("MS950_HKSCS", "", new String[] {}), |
| new Charset("MS874", "windows-874", new String[] {"cp874"}), |
| new Charset("MS949", "windows-949", new String[] {"windows949", "ms_949", "x-windows-949"}), |
| new Charset("MS950", "windows-950", new String[] {"x-windows-950"}), |
| |
| new Charset("Cp737", null, new String[] {}), |
| new Charset("Cp856", null, new String[] {}), |
| new Charset("Cp875", null, new String[] {}), |
| new Charset("Cp921", null, new String[] {}), |
| new Charset("Cp922", null, new String[] {}), |
| new Charset("Cp930", null, new String[] {}), |
| new Charset("Cp933", null, new String[] {}), |
| new Charset("Cp935", null, new String[] {}), |
| new Charset("Cp937", null, new String[] {}), |
| new Charset("Cp939", null, new String[] {}), |
| new Charset("Cp942", null, new String[] {}), |
| new Charset("Cp942C", null, new String[] {}), |
| new Charset("Cp943", null, new String[] {}), |
| new Charset("Cp943C", null, new String[] {}), |
| new Charset("Cp948", null, new String[] {}), |
| new Charset("Cp949", null, new String[] {}), |
| new Charset("Cp949C", null, new String[] {}), |
| new Charset("Cp950", null, new String[] {}), |
| new Charset("Cp964", null, new String[] {}), |
| new Charset("Cp970", null, new String[] {}), |
| new Charset("Cp1006", null, new String[] {}), |
| new Charset("Cp1025", null, new String[] {}), |
| new Charset("Cp1046", null, new String[] {}), |
| new Charset("Cp1097", null, new String[] {}), |
| new Charset("Cp1098", null, new String[] {}), |
| new Charset("Cp1112", null, new String[] {}), |
| new Charset("Cp1122", null, new String[] {}), |
| new Charset("Cp1123", null, new String[] {}), |
| new Charset("Cp1124", null, new String[] {}), |
| new Charset("Cp1381", null, new String[] {}), |
| new Charset("Cp1383", null, new String[] {}), |
| new Charset("Cp33722", null, new String[] {}), |
| new Charset("Big5_Solaris", null, new String[] {}), |
| new Charset("EUC_JP_LINUX", null, new String[] {}), |
| new Charset("EUC_JP_Solaris", null, new String[] {}), |
| new Charset("ISCII91", null, new String[] {"x-ISCII91", "iscii"}), |
| new Charset("ISO2022_CN_CNS", null, new String[] {}), |
| new Charset("ISO2022_CN_GB", null, new String[] {}), |
| new Charset("x-iso-8859-11", null, new String[] {}), |
| new Charset("JISAutoDetect", null, new String[] {}), |
| new Charset("MacArabic", null, new String[] {}), |
| new Charset("MacCentralEurope", null, new String[] {}), |
| new Charset("MacCroatian", null, new String[] {}), |
| new Charset("MacCyrillic", null, new String[] {}), |
| new Charset("MacDingbat", null, new String[] {}), |
| new Charset("MacGreek", "MacGreek", new String[] {}), |
| new Charset("MacHebrew", null, new String[] {}), |
| new Charset("MacIceland", null, new String[] {}), |
| new Charset("MacRoman", "MacRoman", new String[] {"Macintosh", "MAC", "csMacintosh"}), |
| new Charset("MacRomania", null, new String[] {}), |
| new Charset("MacSymbol", null, new String[] {}), |
| new Charset("MacThai", null, new String[] {}), |
| new Charset("MacTurkish", null, new String[] {}), |
| new Charset("MacUkraine", null, new String[] {}), |
| new Charset("UnicodeBig", null, new String[] {}), |
| new Charset("UnicodeLittle", null, new String[] {}) |
| }; |
| |
| /** |
| * Contains the canonical names of character sets which can be used to |
| * decode bytes into Java chars. |
| */ |
| private static TreeSet<String> decodingSupported = null; |
| |
| /** |
| * Contains the canonical names of character sets which can be used to |
| * encode Java chars into bytes. |
| */ |
| private static TreeSet<String> encodingSupported = null; |
| |
| /** |
| * Maps character set names to Charset objects. All possible names of |
| * a charset will be mapped to the Charset. |
| */ |
| private static HashMap<String, Charset> charsetMap = null; |
| |
| static { |
| decodingSupported = new TreeSet<String>(); |
| encodingSupported = new TreeSet<String>(); |
| byte[] dummy = new byte[] {'d', 'u', 'm', 'm', 'y'}; |
| for (int i = 0; i < JAVA_CHARSETS.length; i++) { |
| try { |
| String s = new String(dummy, JAVA_CHARSETS[i].canonical); |
| decodingSupported.add(JAVA_CHARSETS[i].canonical.toLowerCase(Locale.US)); |
| } catch (UnsupportedOperationException e) { |
| } catch (UnsupportedEncodingException e) { |
| } |
| try { |
| "dummy".getBytes(JAVA_CHARSETS[i].canonical); |
| encodingSupported.add(JAVA_CHARSETS[i].canonical.toLowerCase(Locale.US)); |
| } catch (UnsupportedOperationException e) { |
| } catch (UnsupportedEncodingException e) { |
| } |
| } |
| |
| charsetMap = new HashMap<String, Charset>(); |
| for (int i = 0; i < JAVA_CHARSETS.length; i++) { |
| Charset c = JAVA_CHARSETS[i]; |
| charsetMap.put(c.canonical.toLowerCase(Locale.US), c); |
| if (c.mime != null) { |
| charsetMap.put(c.mime.toLowerCase(Locale.US), c); |
| } |
| if (c.aliases != null) { |
| for (int j = 0; j < c.aliases.length; j++) { |
| charsetMap.put(c.aliases[j].toLowerCase(Locale.US), c); |
| } |
| } |
| } |
| |
| if (log.isDebugEnabled()) { |
| log.debug("Character sets which support decoding: " |
| + decodingSupported); |
| log.debug("Character sets which support encoding: " |
| + encodingSupported); |
| } |
| } |
| |
| /** |
| * ANDROID: THE FOLLOWING SET OF STATIC STRINGS ARE COPIED FROM A NEWER VERSION OF MIME4J |
| */ |
| |
| /** carriage return - line feed sequence */ |
| public static final String CRLF = "\r\n"; |
| |
| /** US-ASCII CR, carriage return (13) */ |
| public static final int CR = '\r'; |
| |
| /** US-ASCII LF, line feed (10) */ |
| public static final int LF = '\n'; |
| |
| /** US-ASCII SP, space (32) */ |
| public static final int SP = ' '; |
| |
| /** US-ASCII HT, horizontal-tab (9)*/ |
| public static final int HT = '\t'; |
| |
| public static final java.nio.charset.Charset US_ASCII = java.nio.charset.Charset |
| .forName("US-ASCII"); |
| |
| public static final java.nio.charset.Charset ISO_8859_1 = java.nio.charset.Charset |
| .forName("ISO-8859-1"); |
| |
| public static final java.nio.charset.Charset UTF_8 = java.nio.charset.Charset |
| .forName("UTF-8"); |
| |
| /** |
| * Returns <code>true</code> if the specified character is a whitespace |
| * character (CR, LF, SP or HT). |
| * |
| * ANDROID: COPIED FROM A NEWER VERSION OF MIME4J |
| * |
| * @param ch |
| * character to test. |
| * @return <code>true</code> if the specified character is a whitespace |
| * character, <code>false</code> otherwise. |
| */ |
| public static boolean isWhitespace(char ch) { |
| return ch == SP || ch == HT || ch == CR || ch == LF; |
| } |
| |
| /** |
| * Returns <code>true</code> if the specified string consists entirely of |
| * whitespace characters. |
| * |
| * ANDROID: COPIED FROM A NEWER VERSION OF MIME4J |
| * |
| * @param s |
| * string to test. |
| * @return <code>true</code> if the specified string consists entirely of |
| * whitespace characters, <code>false</code> otherwise. |
| */ |
| public static boolean isWhitespace(final String s) { |
| if (s == null) { |
| throw new IllegalArgumentException("String may not be null"); |
| } |
| final int len = s.length(); |
| for (int i = 0; i < len; i++) { |
| if (!isWhitespace(s.charAt(i))) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Determines if the VM supports encoding (chars to bytes) the |
| * specified character set. NOTE: the given character set name may |
| * not be known to the VM even if this method returns <code>true</code>. |
| * Use {@link #toJavaCharset(String)} to get the canonical Java character |
| * set name. |
| * |
| * @param charsetName the characters set name. |
| * @return <code>true</code> if encoding is supported, <code>false</code> |
| * otherwise. |
| */ |
| public static boolean isEncodingSupported(String charsetName) { |
| return encodingSupported.contains(charsetName.toLowerCase(Locale.US)); |
| } |
| |
| /** |
| * Determines if the VM supports decoding (bytes to chars) the |
| * specified character set. NOTE: the given character set name may |
| * not be known to the VM even if this method returns <code>true</code>. |
| * Use {@link #toJavaCharset(String)} to get the canonical Java character |
| * set name. |
| * |
| * @param charsetName the characters set name. |
| * @return <code>true</code> if decoding is supported, <code>false</code> |
| * otherwise. |
| */ |
| public static boolean isDecodingSupported(String charsetName) { |
| return decodingSupported.contains(charsetName.toLowerCase(Locale.US)); |
| } |
| |
| /** |
| * Gets the preferred MIME character set name for the specified |
| * character set or <code>null</code> if not known. |
| * |
| * @param charsetName the character set name to look for. |
| * @return the MIME preferred name or <code>null</code> if not known. |
| */ |
| public static String toMimeCharset(String charsetName) { |
| Charset c = charsetMap.get(charsetName.toLowerCase(Locale.US)); |
| if (c != null) { |
| return c.mime; |
| } |
| return null; |
| } |
| |
| /** |
| * Gets the canonical Java character set name for the specified |
| * character set or <code>null</code> if not known. This should be |
| * called before doing any conversions using the Java API. NOTE: |
| * you must use {@link #isEncodingSupported(String)} or |
| * {@link #isDecodingSupported(String)} to make sure the returned |
| * Java character set is supported by the current VM. |
| * |
| * @param charsetName the character set name to look for. |
| * @return the canonical Java name or <code>null</code> if not known. |
| */ |
| public static String toJavaCharset(String charsetName) { |
| Charset c = charsetMap.get(charsetName.toLowerCase(Locale.US)); |
| if (c != null) { |
| return c.canonical; |
| } |
| return null; |
| } |
| |
| public static java.nio.charset.Charset getCharset(String charsetName) { |
| String defaultCharset = "ISO-8859-1"; |
| |
| // Use the default chareset if given charset is null |
| if(charsetName == null) charsetName = defaultCharset; |
| |
| try { |
| return java.nio.charset.Charset.forName(charsetName); |
| } catch (IllegalCharsetNameException e) { |
| log.info("Illegal charset " + charsetName + ", fallback to " + |
| defaultCharset + ": " + e); |
| // Use default charset on exception |
| return java.nio.charset.Charset.forName(defaultCharset); |
| } catch (UnsupportedCharsetException ex) { |
| log.info("Unsupported charset " + charsetName + ", fallback to " + |
| defaultCharset + ": " + ex); |
| // Use default charset on exception |
| return java.nio.charset.Charset.forName(defaultCharset); |
| } |
| |
| } |
| /* |
| * Uncomment the code below and run the main method to regenerate the |
| * Javadoc table above when the known charsets change. |
| */ |
| |
| /* |
| private static String dumpHtmlTable() { |
| LinkedList l = new LinkedList(Arrays.asList(JAVA_CHARSETS)); |
| Collections.sort(l); |
| StringBuffer sb = new StringBuffer(); |
| sb.append(" * <table>\n"); |
| sb.append(" * <tr>\n"); |
| sb.append(" * <td>Canonical (Java) name</td>\n"); |
| sb.append(" * <td>MIME preferred</td>\n"); |
| sb.append(" * <td>Aliases</td>\n"); |
| sb.append(" * </tr>\n"); |
| |
| for (Iterator it = l.iterator(); it.hasNext();) { |
| Charset c = (Charset) it.next(); |
| sb.append(" * <tr>\n"); |
| sb.append(" * <td>" + c.canonical + "</td>\n"); |
| sb.append(" * <td>" + (c.mime == null ? "?" : c.mime)+ "</td>\n"); |
| sb.append(" * <td>"); |
| for (int i = 0; c.aliases != null && i < c.aliases.length; i++) { |
| sb.append(c.aliases[i] + " "); |
| } |
| sb.append("</td>\n"); |
| sb.append(" * </tr>\n"); |
| } |
| sb.append(" * </table>\n"); |
| return sb.toString(); |
| } |
| |
| public static void main(String[] args) { |
| System.out.println(dumpHtmlTable()); |
| }*/ |
| } |