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ExtendedCharsets.java
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ExtendedCharsets.java
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/*
* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
// -- This file was mechanically generated: Do not edit! -- //
package sun.nio.cs.ext;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* Provider for extended charsets.
*/
// 扩展的字符集提供商
public class ExtendedCharsets extends AbstractCharsetProvider {
static volatile ExtendedCharsets instance = null; // 指向自身的引用
private boolean initialized = false;
// 统一设置字符集相关的各种映射
public ExtendedCharsets() {
super("sun.nio.cs.ext"); // 识别提供商的包名
charset("Big5", "Big5", new String[]{"csBig5",});
charset("x-EUC-TW", "EUC_TW", new String[]{"euc_tw", "euctw", "cns11643", "EUC-TW",});
charset("Big5-HKSCS", "Big5_HKSCS", new String[]{"Big5_HKSCS", "big5hk", "big5-hkscs", "big5hkscs",});
charset("x-Big5-HKSCS-2001", "Big5_HKSCS_2001", new String[]{"Big5_HKSCS_2001", "big5hk-2001", "big5-hkscs-2001", "big5-hkscs:unicode3.0", "big5hkscs-2001",});
charset("x-Big5-Solaris", "Big5_Solaris", new String[]{"Big5_Solaris",});
charset("GB18030", "GB18030", new String[]{"gb18030-2000",});
charset("GB2312", "EUC_CN", new String[]{"gb2312", "gb2312-80", "gb2312-1980", "euc-cn", "euccn", "x-EUC-CN", "EUC_CN",});
charset("x-JIS0208", "JIS_X_0208", new String[]{"JIS0208", "JIS_C6226-1983", "iso-ir-87", "x0208", "JIS_X0208-1983", "csISO87JISX0208",});
charset("JIS_X0212-1990", "JIS_X_0212", new String[]{"JIS0212", "jis_x0212-1990", "x0212", "iso-ir-159", "csISO159JISX02121990",});
charset("x-SJIS_0213", "SJIS_0213", new String[]{"sjis-0213", "sjis_0213", "sjis:2004", "sjis_0213:2004", "shift_jis_0213:2004", "shift_jis:2004",});
charset("x-MS932_0213", "MS932_0213", new String[]{"MS932-0213", "MS932_0213", "MS932:2004", "windows-932-0213", "windows-932:2004",});
charset("EUC-JP", "EUC_JP", new String[]{"euc_jp", "eucjis", "eucjp", "Extended_UNIX_Code_Packed_Format_for_Japanese", "csEUCPkdFmtjapanese", "x-euc-jp", "x-eucjp",});
charset("x-euc-jp-linux", "EUC_JP_LINUX", new String[]{"euc_jp_linux", "euc-jp-linux",});
charset("x-eucJP-Open", "EUC_JP_Open", new String[]{"EUC_JP_Solaris", "eucJP-open",});
charset("x-PCK", "PCK", new String[]{"pck",});
charset("ISO-2022-JP", "ISO2022_JP", new String[]{"iso2022jp", "jis", "csISO2022JP", "jis_encoding", "csjisencoding",});
charset("ISO-2022-JP-2", "ISO2022_JP_2", new String[]{"csISO2022JP2", "iso2022jp2",});
charset("x-windows-50221", "MS50221", new String[]{"ms50221", "cp50221",});
charset("x-windows-50220", "MS50220", new String[]{"ms50220", "cp50220",});
charset("x-windows-iso2022jp", "MSISO2022JP", new String[]{"windows-iso2022jp",});
charset("x-JISAutoDetect", "JISAutoDetect", new String[]{"JISAutoDetect",});
charset("EUC-KR", "EUC_KR", new String[]{"euc_kr", "ksc5601", "euckr", "ks_c_5601-1987", "ksc5601-1987", "ksc5601_1987", "ksc_5601", "csEUCKR", "5601",});
charset("ISO-2022-KR", "ISO2022_KR", new String[]{"ISO2022KR", "csISO2022KR",});
charset("ISO-2022-CN", "ISO2022_CN", new String[]{"ISO2022CN", "csISO2022CN",});
charset("x-ISO-2022-CN-CNS", "ISO2022_CN_CNS", new String[]{"ISO2022CN_CNS", "ISO-2022-CN-CNS",});
charset("x-ISO-2022-CN-GB", "ISO2022_CN_GB", new String[]{"ISO2022CN_GB", "ISO-2022-CN-GB",});
charset("x-ISCII91", "ISCII91", new String[]{"iscii", "ST_SEV_358-88", "iso-ir-153", "csISO153GOST1976874", "ISCII91",});
charset("ISO-8859-3", "ISO_8859_3", new String[]{"iso8859_3", "8859_3", "ISO_8859-3:1988", "iso-ir-109", "ISO_8859-3", "ISO8859-3", "latin3", "l3", "ibm913", "ibm-913", "cp913", "913", "csISOLatin3",});
charset("ISO-8859-6", "ISO_8859_6", new String[]{"iso8859_6", "8859_6", "iso-ir-127", "ISO_8859-6", "ISO_8859-6:1987", "ISO8859-6", "ECMA-114", "ASMO-708", "arabic", "ibm1089", "ibm-1089", "cp1089", "1089", "csISOLatinArabic",});
charset("ISO-8859-8", "ISO_8859_8", new String[]{"iso8859_8", "8859_8", "iso-ir-138", "ISO_8859-8", "ISO_8859-8:1988", "ISO8859-8", "cp916", "916", "ibm916", "ibm-916", "hebrew", "csISOLatinHebrew",});
charset("x-iso-8859-11", "ISO_8859_11", new String[]{"iso-8859-11", "iso8859_11",});
charset("TIS-620", "TIS_620", new String[]{"tis620", "tis620.2533",});
charset("x-IBM942", "IBM942", new String[]{"cp942", "ibm942", "ibm-942", "942",});
charset("x-IBM942C", "IBM942C", new String[]{"cp942C", "ibm942C", "ibm-942C", "942C", "cp932", "ibm932", "ibm-932", "932", "x-ibm932",});
charset("x-IBM943", "IBM943", new String[]{"cp943", "ibm943", "ibm-943", "943",});
charset("x-IBM943C", "IBM943C", new String[]{"cp943C", "ibm943C", "ibm-943C", "943C",});
charset("x-IBM948", "IBM948", new String[]{"cp948", "ibm948", "ibm-948", "948",});
charset("x-IBM950", "IBM950", new String[]{"cp950", "ibm950", "ibm-950", "950",});
charset("x-IBM930", "IBM930", new String[]{"cp930", "ibm930", "ibm-930", "930",});
charset("x-IBM935", "IBM935", new String[]{"cp935", "ibm935", "ibm-935", "935",});
charset("x-IBM937", "IBM937", new String[]{"cp937", "ibm937", "ibm-937", "937",});
charset("x-IBM856", "IBM856", new String[]{"cp856", "ibm-856", "ibm856", "856",});
charset("IBM860", "IBM860", new String[]{"cp860", "ibm860", "ibm-860", "860", "csIBM860",});
charset("IBM861", "IBM861", new String[]{"cp861", "ibm861", "ibm-861", "861", "csIBM861", "cp-is",});
charset("IBM863", "IBM863", new String[]{"cp863", "ibm863", "ibm-863", "863", "csIBM863",});
charset("IBM864", "IBM864", new String[]{"cp864", "ibm864", "ibm-864", "864", "csIBM864",});
charset("IBM865", "IBM865", new String[]{"cp865", "ibm865", "ibm-865", "865", "csIBM865",});
charset("IBM868", "IBM868", new String[]{"cp868", "ibm868", "ibm-868", "868", "cp-ar", "csIBM868",});
charset("IBM869", "IBM869", new String[]{"cp869", "ibm869", "ibm-869", "869", "cp-gr", "csIBM869",});
charset("x-IBM921", "IBM921", new String[]{"cp921", "ibm921", "ibm-921", "921",});
charset("x-IBM1006", "IBM1006", new String[]{"cp1006", "ibm1006", "ibm-1006", "1006",});
charset("x-IBM1046", "IBM1046", new String[]{"cp1046", "ibm1046", "ibm-1046", "1046",});
charset("IBM1047", "IBM1047", new String[]{"cp1047", "ibm-1047", "1047",});
charset("x-IBM1098", "IBM1098", new String[]{"cp1098", "ibm1098", "ibm-1098", "1098",});
charset("IBM037", "IBM037", new String[]{"cp037", "ibm037", "ebcdic-cp-us", "ebcdic-cp-ca", "ebcdic-cp-wt", "ebcdic-cp-nl", "csIBM037", "cs-ebcdic-cp-us", "cs-ebcdic-cp-ca", "cs-ebcdic-cp-wt", "cs-ebcdic-cp-nl", "ibm-037", "ibm-37", "cpibm37", "037",});
charset("x-IBM1025", "IBM1025", new String[]{"cp1025", "ibm1025", "ibm-1025", "1025",});
charset("IBM1026", "IBM1026", new String[]{"cp1026", "ibm1026", "ibm-1026", "1026",});
charset("x-IBM1112", "IBM1112", new String[]{"cp1112", "ibm1112", "ibm-1112", "1112",});
charset("x-IBM1122", "IBM1122", new String[]{"cp1122", "ibm1122", "ibm-1122", "1122",});
charset("x-IBM1123", "IBM1123", new String[]{"cp1123", "ibm1123", "ibm-1123", "1123",});
charset("x-IBM1124", "IBM1124", new String[]{"cp1124", "ibm1124", "ibm-1124", "1124",});
charset("x-IBM1364", "IBM1364", new String[]{"cp1364", "ibm1364", "ibm-1364", "1364",});
charset("IBM273", "IBM273", new String[]{"cp273", "ibm273", "ibm-273", "273",});
charset("IBM277", "IBM277", new String[]{"cp277", "ibm277", "ibm-277", "277",});
charset("IBM278", "IBM278", new String[]{"cp278", "ibm278", "ibm-278", "278", "ebcdic-sv", "ebcdic-cp-se", "csIBM278",});
charset("IBM280", "IBM280", new String[]{"cp280", "ibm280", "ibm-280", "280",});
charset("IBM284", "IBM284", new String[]{"cp284", "ibm284", "ibm-284", "284", "csIBM284", "cpibm284",});
charset("IBM285", "IBM285", new String[]{"cp285", "ibm285", "ibm-285", "285", "ebcdic-cp-gb", "ebcdic-gb", "csIBM285", "cpibm285",});
charset("IBM297", "IBM297", new String[]{"cp297", "ibm297", "ibm-297", "297", "ebcdic-cp-fr", "cpibm297", "csIBM297",});
charset("IBM420", "IBM420", new String[]{"cp420", "ibm420", "ibm-420", "ebcdic-cp-ar1", "420", "csIBM420",});
charset("IBM424", "IBM424", new String[]{"cp424", "ibm424", "ibm-424", "424", "ebcdic-cp-he", "csIBM424",});
charset("IBM500", "IBM500", new String[]{"cp500", "ibm500", "ibm-500", "500", "ebcdic-cp-ch", "ebcdic-cp-bh", "csIBM500",});
charset("x-IBM833", "IBM833", new String[]{"cp833", "ibm833", "ibm-833",});
charset("x-IBM834", "IBM834", new String[]{"cp834", "ibm834", "834", "ibm-834",});
charset("IBM-Thai", "IBM838", new String[]{"cp838", "ibm838", "ibm-838", "838",});
charset("IBM870", "IBM870", new String[]{"cp870", "ibm870", "ibm-870", "870", "ebcdic-cp-roece", "ebcdic-cp-yu", "csIBM870",});
charset("IBM871", "IBM871", new String[]{"cp871", "ibm871", "ibm-871", "871", "ebcdic-cp-is", "csIBM871",});
charset("x-IBM875", "IBM875", new String[]{"cp875", "ibm875", "ibm-875", "875",});
charset("IBM918", "IBM918", new String[]{"cp918", "ibm-918", "918", "ebcdic-cp-ar2",});
charset("x-IBM922", "IBM922", new String[]{"cp922", "ibm922", "ibm-922", "922",});
charset("x-IBM1097", "IBM1097", new String[]{"cp1097", "ibm1097", "ibm-1097", "1097",});
charset("x-IBM949", "IBM949", new String[]{"cp949", "ibm949", "ibm-949", "949",});
charset("x-IBM949C", "IBM949C", new String[]{"cp949C", "ibm949C", "ibm-949C", "949C",});
charset("x-IBM939", "IBM939", new String[]{"cp939", "ibm939", "ibm-939", "939",});
charset("x-IBM933", "IBM933", new String[]{"cp933", "ibm933", "ibm-933", "933",});
charset("x-IBM1381", "IBM1381", new String[]{"cp1381", "ibm1381", "ibm-1381", "1381",});
charset("x-IBM1383", "IBM1383", new String[]{"cp1383", "ibm1383", "ibm-1383", "1383", "ibmeuccn", "ibm-euccn", "cpeuccn",});
charset("x-IBM970", "IBM970", new String[]{"cp970", "ibm970", "ibm-970", "ibm-eucKR", "970",});
charset("x-IBM964", "IBM964", new String[]{"cp964", "ibm964", "ibm-964", "964",});
charset("x-IBM33722", "IBM33722", new String[]{"cp33722", "ibm33722", "ibm-33722", "ibm-5050", "ibm-33722_vascii_vpua", "33722",});
charset("IBM01140", "IBM1140", new String[]{"cp1140", "ccsid01140", "cp01140", "1140", "ebcdic-us-037+euro",});
charset("IBM01141", "IBM1141", new String[]{"cp1141", "ccsid01141", "cp01141", "1141", "ebcdic-de-273+euro",});
charset("IBM01142", "IBM1142", new String[]{"cp1142", "ccsid01142", "cp01142", "1142", "ebcdic-no-277+euro", "ebcdic-dk-277+euro",});
charset("IBM01143", "IBM1143", new String[]{"cp1143", "ccsid01143", "cp01143", "1143", "ebcdic-fi-278+euro", "ebcdic-se-278+euro",});
charset("IBM01144", "IBM1144", new String[]{"cp1144", "ccsid01144", "cp01144", "1144", "ebcdic-it-280+euro",});
charset("IBM01145", "IBM1145", new String[]{"cp1145", "ccsid01145", "cp01145", "1145", "ebcdic-es-284+euro",});
charset("IBM01146", "IBM1146", new String[]{"cp1146", "ccsid01146", "cp01146", "1146", "ebcdic-gb-285+euro",});
charset("IBM01147", "IBM1147", new String[]{"cp1147", "ccsid01147", "cp01147", "1147", "ebcdic-fr-277+euro",});
charset("IBM01148", "IBM1148", new String[]{"cp1148", "ccsid01148", "cp01148", "1148", "ebcdic-international-500+euro",});
charset("IBM01149", "IBM1149", new String[]{"cp1149", "ccsid01149", "cp01149", "1149", "ebcdic-s-871+euro",});
charset("IBM290", "IBM290", new String[]{"cp290", "ibm290", "ibm-290", "csIBM290", "EBCDIC-JP-kana", "290",});
charset("x-IBM1166", "IBM1166", new String[]{"cp1166", "ibm1166", "ibm-1166", "1166",});
charset("x-IBM300", "IBM300", new String[]{"cp300", "ibm300", "ibm-300", "300",});
charset("x-MacRoman", "MacRoman", new String[]{"MacRoman",});
charset("x-MacCentralEurope", "MacCentralEurope", new String[]{"MacCentralEurope",});
charset("x-MacCroatian", "MacCroatian", new String[]{"MacCroatian",});
charset("x-MacGreek", "MacGreek", new String[]{"MacGreek",});
charset("x-MacCyrillic", "MacCyrillic", new String[]{"MacCyrillic",});
charset("x-MacUkraine", "MacUkraine", new String[]{"MacUkraine",});
charset("x-MacTurkish", "MacTurkish", new String[]{"MacTurkish",});
charset("x-MacArabic", "MacArabic", new String[]{"MacArabic",});
charset("x-MacHebrew", "MacHebrew", new String[]{"MacHebrew",});
charset("x-MacIceland", "MacIceland", new String[]{"MacIceland",});
charset("x-MacRomania", "MacRomania", new String[]{"MacRomania",});
charset("x-MacThai", "MacThai", new String[]{"MacThai",});
charset("x-MacSymbol", "MacSymbol", new String[]{"MacSymbol",});
charset("x-MacDingbat", "MacDingbat", new String[]{"MacDingbat",});
instance = this;
}
// 根据规范名，返回别名集合
public static String[] aliasesFor(String charsetName) {
if(instance == null)
return null;
return instance.aliases(charsetName);
}
private static String getProperty(String key) {
/* this method may be called during initialization of system class loader and thus not using lambda */
// 在系统类加载器的初始化期间可以调用此方法，因此不使用lambda表达式
return AccessController.doPrivileged(new PrivilegedAction<String>() {
@Override
public String run() {
return System.getProperty(key);
}
});
}
// If the sun.nio.cs.map property is defined on the command line we won't
// see it in the system-properties table until after the charset subsystem
// has been initialized. We therefore delay the effect of this property
// until after the JRE has completely booted.
//
// At the moment following values for this property are supported, property
// value string is case insensitive.
//
// (1)"Windows-31J/Shift_JIS"
// In 1.4.1 we added a correct implementation of the Shift_JIS charset
// but in previous releases this charset name had been treated as an alias
// for Windows-31J, aka MS932. Users who have existing code that depends
// upon this alias can restore the previous behavior by defining this
// property to have this value.
//
// (2)"x-windows-50221/ISO-2022-JP"
// "x-windows-50220/ISO-2022-JP"
// "x-windows-iso2022jp/ISO-2022-JP"
// The charset ISO-2022-JP is a "standard based" implementation by default,
// which supports ASCII, JIS_X_0201 and JIS_X_0208 mappings based encoding
// and decoding only.
// There are three Microsoft iso-2022-jp variants, namely x-windows-50220,
// x-windows-50221 and x-windows-iso2022jp which behaves "slightly" differently
// compared to the "standard based" implementation. See ISO2022_JP.java for
// detailed description. Users who prefer the behavior of MS iso-2022-jp
// variants should use these names explicitly instead of using "ISO-2022-JP"
// and its aliases. However for those who need the ISO-2022-JP charset behaves
// exactly the same as MS variants do, above properties can be defined to
// switch.
//
// If we need to define other charset-alias mappings in the future then
// this property could be further extended, the general idea being that its
// value should be of the form
//
// new-charset-1/old-charset-1,new-charset-2/old-charset-2,...
//
// where each charset named to the left of a slash is intended to replace
// (most) uses of the charset named to the right of the slash.
//
protected void init() {
if(initialized)
return;
if(!jdk.internal.misc.VM.isBooted())
return;
String map = getProperty("sun.nio.cs.map");
boolean sjisIsMS932 = false;
boolean iso2022jpIsMS50221 = false;
boolean iso2022jpIsMS50220 = false;
boolean iso2022jpIsMSISO2022JP = false;
if(map != null) {
String[] maps = map.split(",");
for(String m : maps) {
if(m.equalsIgnoreCase("Windows-31J/Shift_JIS")) {
sjisIsMS932 = true;
} else if(m.equalsIgnoreCase("x-windows-50221/ISO-2022-JP")) {
iso2022jpIsMS50221 = true;
} else if(m.equalsIgnoreCase("x-windows-50220/ISO-2022-JP")) {
iso2022jpIsMS50220 = true;
} else if(m.equalsIgnoreCase("x-windows-iso2022jp/ISO-2022-JP")) {
iso2022jpIsMSISO2022JP = true;
}
}
}
if(sjisIsMS932 && hasCharset("Shift_JIS")) {
deleteCharset("Shift_JIS", new String[]{
// IANA aliases
"sjis", // historical
"shift_jis", "shift-jis", "ms_kanji", "x-sjis", "csShiftJIS"});
deleteCharset("windows-31j", new String[]{"MS932", // JDK historical
"windows-932", "csWindows31J"});
charset("Shift_JIS", "SJIS", new String[]{
// IANA aliases
"sjis" // JDK historical
});
charset("windows-31j", "MS932", new String[]{"MS932", // JDK historical
"windows-932", "csWindows31J", "shift-jis", "ms_kanji", "x-sjis", "csShiftJIS",
// This alias takes precedence over the actual Shift_JIS charset itself since aliases are always resolved first, before looking up canonical names.
"shift_jis"});
}
if(iso2022jpIsMS50221 || iso2022jpIsMS50220 || iso2022jpIsMSISO2022JP) {
deleteCharset("ISO-2022-JP", new String[]{"iso2022jp", "jis", "csISO2022JP", "jis_encoding", "csjisencoding"});
if(iso2022jpIsMS50221) {
deleteCharset("x-windows-50221", new String[]{"cp50221", "ms50221"});
charset("x-windows-50221", "MS50221", new String[]{"cp50221", "ms50221", "iso-2022-jp", "iso2022jp", "jis", "csISO2022JP", "jis_encoding", "csjisencoding"});
} else if(iso2022jpIsMS50220) {
deleteCharset("x-windows-50220", new String[]{"cp50220", "ms50220"});
charset("x-windows-50220", "MS50220", new String[]{"cp50220", "ms50220", "iso-2022-jp", "iso2022jp", "jis", "csISO2022JP", "jis_encoding", "csjisencoding"});
} else {
deleteCharset("x-windows-iso2022jp", new String[]{"windows-iso2022jp"});
charset("x-windows-iso2022jp", "MSISO2022JP", new String[]{"windows-iso2022jp", "iso-2022-jp", "iso2022jp", "jis", "csISO2022JP", "jis_encoding", "csjisencoding"});
}
}
initialized = true;
}
}