characterencoding.java

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/*
 * @(#)CharacterEncoding.java	1.54	06/10/10
 *
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.  
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER  
 *   
 * This program 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.   
 *   
 * This program 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 at /legal/license.txt).   
 *   
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa  
 * Clara, CA 95054 or visit www.sun.com if you need additional  
 * information or have any questions. 
 *
 */

package sun.io;

import java.util.Collections;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.security.AccessController;
import sun.security.action.GetPropertyAction;

/*
 * This class is public in sun.io, so other sun.* packages (such as
 * HotJava) can use it, without exposing it to java.*.
 * Translates IANA encoding name to the string which is the part of
 * converter class.
 */
public class CharacterEncoding {

    private static boolean sjisIsMS932;

    private static Map aliasTable;

    static {
        aliasTable = new HashMap(460, 1.0f);                    /* MDA */

        aliasTable.put("us-ascii",     		"ASCII");
        aliasTable.put("ascii",     		"ASCII");
	aliasTable.put("646",			"ASCII");	// Solaris POSIX locale
        aliasTable.put("iso_646.irv:1983",      "ASCII");       // Linux POSIX locale
	aliasTable.put("ansi_x3.4-1968",        "ASCII");       // Caldera linux
	aliasTable.put("iso646-us",             "ASCII");
	aliasTable.put("default",               "ASCII");       // compatibility with obsolete "Default" converters
	aliasTable.put("ascii7",                "ASCII");       // compatibility with obsolete "Default" converters

        // MIBenum: 4
        aliasTable.put("8859_1",       		"ISO8859_1");
        aliasTable.put("iso_8859-1:1987",       "ISO8859_1");
        aliasTable.put("iso-ir-100",            "ISO8859_1");
        aliasTable.put("iso_8859-1",            "ISO8859_1");
        aliasTable.put("iso-8859-1",            "ISO8859_1");

        // Standard encodings used on Solaris and Linux
        aliasTable.put("iso8859-1",             "ISO8859_1");
        aliasTable.put("latin1",                "ISO8859_1");
        aliasTable.put("l1",                    "ISO8859_1");
        aliasTable.put("ibm819",                "ISO8859_1");
        aliasTable.put("ibm-819",               "ISO8859_1");
        aliasTable.put("cp819",                 "ISO8859_1");
        aliasTable.put("819",                   "ISO8859_1");
        aliasTable.put("csisolatin1",           "ISO8859_1");

        // MIBenum: 5
        aliasTable.put("8859_2",       		"ISO8859_2");
        aliasTable.put("iso_8859-2:1987",       "ISO8859_2");
        aliasTable.put("iso-ir-101",            "ISO8859_2");
        aliasTable.put("iso_8859-2",            "ISO8859_2");
        aliasTable.put("iso-8859-2",            "ISO8859_2");
        aliasTable.put("iso8859-2",             "ISO8859_2");
        aliasTable.put("latin2",                "ISO8859_2");
        aliasTable.put("l2",                    "ISO8859_2");
        aliasTable.put("ibm912",                "ISO8859_2");
        aliasTable.put("ibm-912",               "ISO8859_2");
        aliasTable.put("cp912",                 "ISO8859_2");
        aliasTable.put("912",                   "ISO8859_2");
        aliasTable.put("csisolatin2",           "ISO8859_2");

        // MIBenum: 6
        aliasTable.put("8859_3",       		"ISO8859_3");
        aliasTable.put("iso_8859-3:1988",       "ISO8859_3");
        aliasTable.put("iso-ir-109",            "ISO8859_3");
        aliasTable.put("iso_8859-3",            "ISO8859_3");
        aliasTable.put("iso-8859-3",            "ISO8859_3");
        aliasTable.put("iso8859-3",             "ISO8859_3");
        aliasTable.put("latin3",                "ISO8859_3");
        aliasTable.put("l3",                    "ISO8859_3");
        aliasTable.put("ibm913",                "ISO8859_3");
        aliasTable.put("ibm-913",               "ISO8859_3");
        aliasTable.put("cp913",                 "ISO8859_3");
        aliasTable.put("913",                   "ISO8859_3");
        aliasTable.put("csisolatin3",           "ISO8859_3");

        // MIBenum: 7
        aliasTable.put("8859_4",       		"ISO8859_4");
        aliasTable.put("iso_8859-4:1988",       "ISO8859_4");
        aliasTable.put("iso-ir-110",            "ISO8859_4");
        aliasTable.put("iso_8859-4",            "ISO8859_4");
        aliasTable.put("iso-8859-4",            "ISO8859_4");
        aliasTable.put("iso8859-4",             "ISO8859_4");
        aliasTable.put("latin4",                "ISO8859_4");
        aliasTable.put("l4",                    "ISO8859_4");
        aliasTable.put("ibm914",                "ISO8859_4");
        aliasTable.put("ibm-914",               "ISO8859_4");
        aliasTable.put("cp914",                 "ISO8859_4");
        aliasTable.put("914",                   "ISO8859_4");
        aliasTable.put("csisolatin4",           "ISO8859_4");

        // MIBenum: 8
        aliasTable.put("8859_5",       		"ISO8859_5");
        aliasTable.put("iso_8859-5:1988",       "ISO8859_5");
        aliasTable.put("iso-ir-144",            "ISO8859_5");
        aliasTable.put("iso_8859-5",            "ISO8859_5");
        aliasTable.put("iso-8859-5",            "ISO8859_5");
        aliasTable.put("iso8859-5",             "ISO8859_5");
        aliasTable.put("cyrillic",              "ISO8859_5");
        aliasTable.put("csisolatincyrillic",    "ISO8859_5");
        aliasTable.put("ibm915",                "ISO8859_5");
        aliasTable.put("ibm-915",               "ISO8859_5");
        aliasTable.put("cp915",                 "ISO8859_5");
        aliasTable.put("915",                   "ISO8859_5");

        // MIBenum: 9
        aliasTable.put("8859_6",       		"ISO8859_6");
        aliasTable.put("iso_8859-6:1987",       "ISO8859_6");
        aliasTable.put("iso-ir-127",            "ISO8859_6");
        aliasTable.put("iso_8859-6",            "ISO8859_6");
        aliasTable.put("iso-8859-6",            "ISO8859_6");
        aliasTable.put("iso8859-6",             "ISO8859_6");
        aliasTable.put("ecma-114",              "ISO8859_6");
        aliasTable.put("asmo-708",              "ISO8859_6");
        aliasTable.put("arabic",                "ISO8859_6");
        aliasTable.put("csisolatinarabic",      "ISO8859_6");
        aliasTable.put("ibm1089",               "ISO8859_6");
        aliasTable.put("ibm-1089",              "ISO8859_6");
        aliasTable.put("cp1089",                "ISO8859_6");
        aliasTable.put("1089",                  "ISO8859_6");

        // MIBenum: 10
        aliasTable.put("8859_7",       		"ISO8859_7");
        aliasTable.put("iso_8859-7:1987",       "ISO8859_7");
        aliasTable.put("iso-ir-126",            "ISO8859_7");
        aliasTable.put("iso_8859-7",            "ISO8859_7");
        aliasTable.put("iso-8859-7",            "ISO8859_7");
        aliasTable.put("iso8859-7",             "ISO8859_7");
        aliasTable.put("elot_928",              "ISO8859_7");
        aliasTable.put("ecma-118",              "ISO8859_7");
        aliasTable.put("greek",                 "ISO8859_7");
        aliasTable.put("greek8",                "ISO8859_7");
        aliasTable.put("csisolatingreek",       "ISO8859_7");
        aliasTable.put("ibm813",                "ISO8859_7");
        aliasTable.put("ibm-813",               "ISO8859_7");
        aliasTable.put("cp813",                 "ISO8859_7");
        aliasTable.put("813",                   "ISO8859_7");

        // MIBenum: 11
        aliasTable.put("8859_8",       		"ISO8859_8");
        aliasTable.put("iso_8859-8:1988",       "ISO8859_8");
        aliasTable.put("iso-ir-138",            "ISO8859_8");
        aliasTable.put("iso_8859-8",            "ISO8859_8");
        aliasTable.put("iso-8859-8",            "ISO8859_8");
        aliasTable.put("iso8859-8",             "ISO8859_8");
        aliasTable.put("hebrew",                "ISO8859_8");
        aliasTable.put("csisolatinhebrew",      "ISO8859_8");
        aliasTable.put("ibm916",                "ISO8859_8");
        aliasTable.put("ibm-916",               "ISO8859_8");
        aliasTable.put("cp916",                 "ISO8859_8");
        aliasTable.put("916",                   "ISO8859_8");

        // MIBenum: 12
        aliasTable.put("8859_9",       		"ISO8859_9");
        aliasTable.put("iso-ir-148",            "ISO8859_9");
        aliasTable.put("iso_8859-9",            "ISO8859_9");
        aliasTable.put("iso-8859-9",            "ISO8859_9");
        aliasTable.put("iso8859-9",             "ISO8859_9");
        aliasTable.put("latin5",                "ISO8859_9");
        aliasTable.put("l5",                    "ISO8859_9");
        aliasTable.put("ibm920",                "ISO8859_9");
        aliasTable.put("ibm-920",               "ISO8859_9");
        aliasTable.put("cp920",                 "ISO8859_9");
        aliasTable.put("920",                   "ISO8859_9");
        aliasTable.put("csisolatin5",           "ISO8859_9");

	// MIBenum: ???
	aliasTable.put("8859_13",               "ISO8859_13");
	aliasTable.put("iso_8859-13",           "ISO8859_13");
	aliasTable.put("iso-8859-13",           "ISO8859_13");
	aliasTable.put("iso8859-13",            "ISO8859_13");


        // MIBenum: ????
        aliasTable.put("8859_15",               "ISO8859_15_FDIS");
        aliasTable.put("iso-8859-15",           "ISO8859_15_FDIS");
        aliasTable.put("iso_8859-15",           "ISO8859_15_FDIS");
        aliasTable.put("iso8859-15",            "ISO8859_15_FDIS");
        aliasTable.put("ibm923",                "ISO8859_15_FDIS");
        aliasTable.put("ibm-923",               "ISO8859_15_FDIS");
        aliasTable.put("cp923",                 "ISO8859_15_FDIS");
        aliasTable.put("923",                   "ISO8859_15_FDIS");
        aliasTable.put("latin0",                "ISO8859_15_FDIS");
        aliasTable.put("latin9",                "ISO8859_15_FDIS");
        aliasTable.put("csisolatin0",           "ISO8859_15_FDIS");
        aliasTable.put("csisolatin9",           "ISO8859_15_FDIS");

        // MIBenum: 106
        aliasTable.put("utf-8",                 "UTF8");

	// Alias recommended in RFC 1641
        aliasTable.put("unicode-1-1-utf-8",     "UTF8");

	// MIBenum: 1010
	aliasTable.put("unicode-1-1",		"UnicodeBigUnmarked");

	// MIBenum: 1000
	aliasTable.put("iso-10646-ucs-2",	"UnicodeBigUnmarked");

	// Per Unicode standard
	aliasTable.put("utf-16be",		"UnicodeBigUnmarked");
	aliasTable.put("utf-16le",		"UnicodeLittleUnmarked");
	aliasTable.put("utf-16",		"UTF16");

	// Used by drag-and-drop subsystem
	aliasTable.put("x-utf-16be",		"UnicodeBigUnmarked");
	aliasTable.put("x-utf-16le",		"UnicodeLittleUnmarked");

        aliasTable.put("unicode",               "Unicode");

        // MIBenum: ????
        aliasTable.put("ibm037",                "Cp037");
        aliasTable.put("ibm-037",               "Cp037");
        aliasTable.put("cp037",                 "Cp037");
        aliasTable.put("037",                   "Cp037");

        // MIBenum: ????
        aliasTable.put("ibm273",                "Cp273");
        aliasTable.put("ibm-273",               "Cp273");
        aliasTable.put("cp273",                 "Cp273");
        aliasTable.put("273",                   "Cp273");