ASCII EBCDIC Conversion

References

See:

• http://www.nntp.perl.org/group/perl.mvs/2001/03/msg735.html
• http://www.babbletower.net/index.html?/manencodings.html
• http://www.guiffy.com/help/GuiffyHelp/Encodings.html
• http://java.sun.com/j2se/1.3/docs/guide/intl/encoding.doc.html

Example

Convert encoding names between MIME and Java

1   /*
2    * The Apache Software License, Version 1.1
3    *
4    *
5    * Copyright (c) 1999 The Apache Software Foundation.  All rights 
6    * reserved.
7    *
8    * Redistribution and use in source and binary forms, with or without
9    * modification, are permitted provided that the following conditions
10   * are met:
11   *
12   * 1. Redistributions of source code must retain the above copyright
13   *    notice, this list of conditions and the following disclaimer. 
14   *
15   * 2. Redistributions in binary form must reproduce the above copyright
16   *    notice, this list of conditions and the following disclaimer in
17   *    the documentation and/or other materials provided with the
18   *    distribution.
19   *
20   * 3. The end-user documentation included with the redistribution,
21   *    if any, must include the following acknowledgment:  
22   *       "This product includes software developed by the
23   *        Apache Software Foundation (http://www.apache.org/)."
24   *    Alternately, this acknowledgment may appear in the software itself,
25   *    if and wherever such third-party acknowledgments normally appear.
26   *
27   * 4. The names "Xerces" and "Apache Software Foundation" must
28   *    not be used to endorse or promote products derived from this
29   *    software without prior written permission. For written 
30   *    permission, please contact apache@apache.org.
31   *
32   * 5. Products derived from this software may not be called "Apache",
33   *    nor may "Apache" appear in their name, without prior written
34   *    permission of the Apache Software Foundation.
35   *
36   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
37   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
39   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
40   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
43   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
44   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
45   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
46   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47   * SUCH DAMAGE.
48   * ====================================================================
49   *
50   * This software consists of voluntary contributions made by many
51   * individuals on behalf of the Apache Software Foundation and was
52   * originally based on software copyright (c) 1999, International
53   * Business Machines, Inc., http://www.apache.org.  For more
54   * information on the Apache Software Foundation, please see
55   * <http://www.apache.org/>.
56   */
57  
58  package org.apache.xerces.readers;
59  
60  import java.util.*;
61  
62  /**
63   * MIME2Java is a convenience class which handles conversions between MIME charset names
64   * and Java encoding names.
65   * <p>The supported XML encodings are the intersection of XML-supported code sets and those 
66   * supported in JDK 1.1.
67   * <p>MIME charset names are used on <var>xmlEncoding</var> parameters to methods such
68   * as <code>TXDocument#setEncoding</code> and <code>DTD#setEncoding</code>.
69   * <p>Java encoding names are used on <var>encoding</var> parameters to
70   * methods such as <code>TXDocument#printWithFormat</code> and <code>DTD#printExternal</code>. 
71   * <P>
72   * <TABLE BORDER="0" WIDTH="100%">
73   *  <TR>
74   *      <TD WIDTH="33%">
75   *          <P ALIGN="CENTER"><B>Common Name</B>
76   *      </TD>
77   *      <TD WIDTH="15%">
78   *          <P ALIGN="CENTER"><B>Use this name in XML files</B>
79   *      </TD>
80   *      <TD WIDTH="12%">
81   *          <P ALIGN="CENTER"><B>Name Type</B>
82   *      </TD>
83   *      <TD WIDTH="31%">
84   *          <P ALIGN="CENTER"><B>Xerces converts to this Java Encoder Name</B>
85   *      </TD>
86   *  </TR>
87   *  <TR>
88   *      <TD WIDTH="33%">8 bit Unicode</TD>
89   *      <TD WIDTH="15%">
90   *          <P ALIGN="CENTER">UTF-8
91   *      </TD>
92   *      <TD WIDTH="12%">
93   *          <P ALIGN="CENTER">IANA
94   *      </TD>
95   *      <TD WIDTH="31%">
96   *          <P ALIGN="CENTER">UTF8
97   *      </TD>
98   *  </TR>
99   *  <TR>
100  *      <TD WIDTH="33%">ISO Latin 1</TD>
101  *      <TD WIDTH="15%">
102  *          <P ALIGN="CENTER">ISO-8859-1
103  *      </TD>
104  *      <TD WIDTH="12%">
105  *          <P ALIGN="CENTER">MIME
106  *      </TD>
107  *      <TD WIDTH="31%">
108  *          <P ALIGN="CENTER">ISO-8859-1
109  *      </TD>
110  *  </TR>
111  *  <TR>
112  *      <TD WIDTH="33%">ISO Latin 2</TD>
113  *      <TD WIDTH="15%">
114  *          <P ALIGN="CENTER">ISO-8859-2
115  *      </TD>
116  *      <TD WIDTH="12%">
117  *          <P ALIGN="CENTER">MIME
118  *      </TD>
119  *      <TD WIDTH="31%">
120  *          <P ALIGN="CENTER">ISO-8859-2
121  *      </TD>
122  *  </TR>
123  *  <TR>
124  *      <TD WIDTH="33%">ISO Latin 3</TD>
125  *      <TD WIDTH="15%">
126  *          <P ALIGN="CENTER">ISO-8859-3
127  *      </TD>
128  *      <TD WIDTH="12%">
129  *          <P ALIGN="CENTER">MIME
130  *      </TD>
131  *      <TD WIDTH="31%">
132  *          <P ALIGN="CENTER">ISO-8859-3
133  *      </TD>
134  *  </TR>
135  *  <TR>
136  *      <TD WIDTH="33%">ISO Latin 4</TD>
137  *      <TD WIDTH="15%">
138  *          <P ALIGN="CENTER">ISO-8859-4
139  *      </TD>
140  *      <TD WIDTH="12%">
141  *          <P ALIGN="CENTER">MIME
142  *      </TD>
143  *      <TD WIDTH="31%">
144  *          <P ALIGN="CENTER">ISO-8859-4
145  *      </TD>
146  *  </TR>
147  *  <TR>
148  *      <TD WIDTH="33%">ISO Latin Cyrillic</TD>
149  *      <TD WIDTH="15%">
150  *          <P ALIGN="CENTER">ISO-8859-5
151  *      </TD>
152  *      <TD WIDTH="12%">
153  *          <P ALIGN="CENTER">MIME
154  *      </TD>
155  *      <TD WIDTH="31%">
156  *          <P ALIGN="CENTER">ISO-8859-5
157  *      </TD>
158  *  </TR>
159  *  <TR>
160  *      <TD WIDTH="33%">ISO Latin Arabic</TD>
161  *      <TD WIDTH="15%">
162  *          <P ALIGN="CENTER">ISO-8859-6
163  *      </TD>
164  *      <TD WIDTH="12%">
165  *          <P ALIGN="CENTER">MIME
166  *      </TD>
167  *      <TD WIDTH="31%">
168  *          <P ALIGN="CENTER">ISO-8859-6
169  *      </TD>
170  *  </TR>
171  *  <TR>
172  *      <TD WIDTH="33%">ISO Latin Greek</TD>
173  *      <TD WIDTH="15%">
174  *          <P ALIGN="CENTER">ISO-8859-7
175  *      </TD>
176  *      <TD WIDTH="12%">
177  *          <P ALIGN="CENTER">MIME
178  *      </TD>
179  *      <TD WIDTH="31%">
180  *          <P ALIGN="CENTER">ISO-8859-7
181  *      </TD>
182  *  </TR>
183  *  <TR>
184  *      <TD WIDTH="33%">ISO Latin Hebrew</TD>
185  *      <TD WIDTH="15%">
186  *          <P ALIGN="CENTER">ISO-8859-8
187  *      </TD>
188  *      <TD WIDTH="12%">
189  *          <P ALIGN="CENTER">MIME
190  *      </TD>
191  *      <TD WIDTH="31%">
192  *          <P ALIGN="CENTER">ISO-8859-8
193  *      </TD>
194  *  </TR>
195  *  <TR>
196  *      <TD WIDTH="33%">ISO Latin 5</TD>
197  *      <TD WIDTH="15%">
198  *          <P ALIGN="CENTER">ISO-8859-9
199  *      </TD>
200  *      <TD WIDTH="12%">
201  *          <P ALIGN="CENTER">MIME
202  *      </TD>
203  *      <TD WIDTH="31%">
204  *          <P ALIGN="CENTER">ISO-8859-9
205  *      </TD>
206  *  </TR>
207  *  <TR>
208  *      <TD WIDTH="33%">EBCDIC: US</TD>
209  *      <TD WIDTH="15%">
210  *          <P ALIGN="CENTER">ebcdic-cp-us
211  *      </TD>
212  *      <TD WIDTH="12%">
213  *          <P ALIGN="CENTER">IANA
214  *      </TD>
215  *      <TD WIDTH="31%">
216  *          <P ALIGN="CENTER">cp037
217  *      </TD>
218  *  </TR>
219  *  <TR>
220  *      <TD WIDTH="33%">EBCDIC: Canada</TD>
221  *      <TD WIDTH="15%">
222  *          <P ALIGN="CENTER">ebcdic-cp-ca
223  *      </TD>
224  *      <TD WIDTH="12%">
225  *          <P ALIGN="CENTER">IANA
226  *      </TD>
227  *      <TD WIDTH="31%">
228  *          <P ALIGN="CENTER">cp037
229  *      </TD>
230  *  </TR>
231  *  <TR>
232  *      <TD WIDTH="33%">EBCDIC: Netherlands</TD>
233  *      <TD WIDTH="15%">
234  *          <P ALIGN="CENTER">ebcdic-cp-nl
235  *      </TD>
236  *      <TD WIDTH="12%">
237  *          <P ALIGN="CENTER">IANA
238  *      </TD>
239  *      <TD WIDTH="31%">
240  *          <P ALIGN="CENTER">cp037
241  *      </TD>
242  *  </TR>
243  *  <TR>
244  *      <TD WIDTH="33%">EBCDIC: Denmark</TD>
245  *      <TD WIDTH="15%">
246  *          <P ALIGN="CENTER">ebcdic-cp-dk
247  *      </TD>
248  *      <TD WIDTH="12%">
249  *          <P ALIGN="CENTER">IANA
250  *      </TD>
251  *      <TD WIDTH="31%">
252  *          <P ALIGN="CENTER">cp277
253  *      </TD>
254  *  </TR>
255  *  <TR>
256  *      <TD WIDTH="33%">EBCDIC: Norway</TD>
257  *      <TD WIDTH="15%">
258  *          <P ALIGN="CENTER">ebcdic-cp-no
259  *      </TD>
260  *      <TD WIDTH="12%">
261  *          <P ALIGN="CENTER">IANA
262  *      </TD>
263  *      <TD WIDTH="31%">
264  *          <P ALIGN="CENTER">cp277
265  *      </TD>
266  *  </TR>
267  *  <TR>
268  *      <TD WIDTH="33%">EBCDIC: Finland</TD>
269  *      <TD WIDTH="15%">
270  *          <P ALIGN="CENTER">ebcdic-cp-fi
271  *      </TD>
272  *      <TD WIDTH="12%">
273  *          <P ALIGN="CENTER">IANA
274  *      </TD>
275  *      <TD WIDTH="31%">
276  *          <P ALIGN="CENTER">cp278
277  *      </TD>
278  *  </TR>
279  *  <TR>
280  *      <TD WIDTH="33%">EBCDIC: Sweden</TD>
281  *      <TD WIDTH="15%">
282  *          <P ALIGN="CENTER">ebcdic-cp-se
283  *      </TD>
284  *      <TD WIDTH="12%">
285  *          <P ALIGN="CENTER">IANA
286  *      </TD>
287  *      <TD WIDTH="31%">
288  *          <P ALIGN="CENTER">cp278
289  *      </TD>
290  *  </TR>
291  *  <TR>
292  *      <TD WIDTH="33%">EBCDIC: Italy</TD>
293  *      <TD WIDTH="15%">
294  *          <P ALIGN="CENTER">ebcdic-cp-it
295  *      </TD>
296  *      <TD WIDTH="12%">
297  *          <P ALIGN="CENTER">IANA
298  *      </TD>
299  *      <TD WIDTH="31%">
300  *          <P ALIGN="CENTER">cp280
301  *      </TD>
302  *  </TR>
303  *  <TR>
304  *      <TD WIDTH="33%">EBCDIC: Spain, Latin America</TD>
305  *      <TD WIDTH="15%">
306  *          <P ALIGN="CENTER">ebcdic-cp-es
307  *      </TD>
308  *      <TD WIDTH="12%">
309  *          <P ALIGN="CENTER">IANA
310  *      </TD>
311  *      <TD WIDTH="31%">
312  *          <P ALIGN="CENTER">cp284
313  *      </TD>
314  *  </TR>
315  *  <TR>
316  *      <TD WIDTH="33%">EBCDIC: Great Britain</TD>
317  *      <TD WIDTH="15%">
318  *          <P ALIGN="CENTER">ebcdic-cp-gb
319  *      </TD>
320  *      <TD WIDTH="12%">
321  *          <P ALIGN="CENTER">IANA
322  *      </TD>
323  *      <TD WIDTH="31%">
324  *          <P ALIGN="CENTER">cp285
325  *      </TD>
326  *  </TR>
327  *  <TR>
328  *      <TD WIDTH="33%">EBCDIC: France</TD>
329  *      <TD WIDTH="15%">
330  *          <P ALIGN="CENTER">ebcdic-cp-fr
331  *      </TD>
332  *      <TD WIDTH="12%">
333  *          <P ALIGN="CENTER">IANA
334  *      </TD>
335  *      <TD WIDTH="31%">
336  *          <P ALIGN="CENTER">cp297
337  *      </TD>
338  *  </TR>
339  *  <TR>
340  *      <TD WIDTH="33%">EBCDIC: Arabic</TD>
341  *      <TD WIDTH="15%">
342  *          <P ALIGN="CENTER">ebcdic-cp-ar1
343  *      </TD>
344  *      <TD WIDTH="12%">
345  *          <P ALIGN="CENTER">IANA
346  *      </TD>
347  *      <TD WIDTH="31%">
348  *          <P ALIGN="CENTER">cp420
349  *      </TD>
350  *  </TR>
351  *  <TR>
352  *      <TD WIDTH="33%">EBCDIC: Hebrew</TD>
353  *      <TD WIDTH="15%">
354  *          <P ALIGN="CENTER">ebcdic-cp-he
355  *      </TD>
356  *      <TD WIDTH="12%">
357  *          <P ALIGN="CENTER">IANA
358  *      </TD>
359  *      <TD WIDTH="31%">
360  *          <P ALIGN="CENTER">cp424
361  *      </TD>
362  *  </TR>
363  *  <TR>
364  *      <TD WIDTH="33%">EBCDIC: Switzerland</TD>
365  *      <TD WIDTH="15%">
366  *          <P ALIGN="CENTER">ebcdic-cp-ch
367  *      </TD>
368  *      <TD WIDTH="12%">
369  *          <P ALIGN="CENTER">IANA
370  *      </TD>
371  *      <TD WIDTH="31%">
372  *          <P ALIGN="CENTER">cp500
373  *      </TD>
374  *  </TR>
375  *  <TR>
376  *      <TD WIDTH="33%">EBCDIC: Roece</TD>
377  *      <TD WIDTH="15%">
378  *          <P ALIGN="CENTER">ebcdic-cp-roece
379  *      </TD>
380  *      <TD WIDTH="12%">
381  *          <P ALIGN="CENTER">IANA
382  *      </TD>
383  *      <TD WIDTH="31%">
384  *          <P ALIGN="CENTER">cp870
385  *      </TD>
386  *  </TR>
387  *  <TR>
388  *      <TD WIDTH="33%">EBCDIC: Yogoslavia</TD>
389  *      <TD WIDTH="15%">
390  *          <P ALIGN="CENTER">ebcdic-cp-yu
391  *      </TD>
392  *      <TD WIDTH="12%">
393  *          <P ALIGN="CENTER">IANA
394  *      </TD>
395  *      <TD WIDTH="31%">
396  *          <P ALIGN="CENTER">cp870
397  *      </TD>
398  *  </TR>
399  *  <TR>
400  *      <TD WIDTH="33%">EBCDIC: Iceland</TD>
401  *      <TD WIDTH="15%">
402  *          <P ALIGN="CENTER">ebcdic-cp-is
403  *      </TD>
404  *      <TD WIDTH="12%">
405  *          <P ALIGN="CENTER">IANA
406  *      </TD>
407  *      <TD WIDTH="31%">
408  *          <P ALIGN="CENTER">cp871
409  *      </TD>
410  *  </TR>
411  *  <TR>
412  *      <TD WIDTH="33%">EBCDIC: Urdu</TD>
413  *      <TD WIDTH="15%">
414  *          <P ALIGN="CENTER">ebcdic-cp-ar2
415  *      </TD>
416  *      <TD WIDTH="12%">
417  *          <P ALIGN="CENTER">IANA
418  *      </TD>
419  *      <TD WIDTH="31%">
420  *          <P ALIGN="CENTER">cp918
421  *      </TD>
422  *  </TR>
423  *  <TR>
424  *      <TD WIDTH="33%">Chinese for PRC, mixed 1/2 byte</TD>
425  *      <TD WIDTH="15%">
426  *          <P ALIGN="CENTER">gb2312
427  *      </TD>
428  *      <TD WIDTH="12%">
429  *          <P ALIGN="CENTER">MIME
430  *      </TD>
431  *      <TD WIDTH="31%">
432  *          <P ALIGN="CENTER">GB2312
433  *      </TD>
434  *  </TR>
435  *  <TR>
436  *      <TD WIDTH="33%">Extended Unix Code, packed for Japanese</TD>
437  *      <TD WIDTH="15%">
438  *          <P ALIGN="CENTER">euc-jp
439  *      </TD>
440  *      <TD WIDTH="12%">
441  *          <P ALIGN="CENTER">MIME
442  *      </TD>
443  *      <TD WIDTH="31%">
444  *          <P ALIGN="CENTER">eucjis
445  *      </TD>
446  *  </TR>
447  *  <TR>
448  *      <TD WIDTH="33%">Japanese: iso-2022-jp</TD>
449  *      <TD WIDTH="15%">
450  *          <P ALIGN="CENTER">iso-2020-jp
451  *      </TD>
452  *      <TD WIDTH="12%">
453  *          <P ALIGN="CENTER">MIME
454  *      </TD>
455  *      <TD WIDTH="31%">
456  *          <P ALIGN="CENTER">JIS
457  *      </TD>
458  *  </TR>
459  *  <TR>
460  *      <TD WIDTH="33%">Japanese: Shift JIS</TD>
461  *      <TD WIDTH="15%">
462  *          <P ALIGN="CENTER">Shift_JIS
463  *      </TD>
464  *      <TD WIDTH="12%">
465  *          <P ALIGN="CENTER">MIME
466  *      </TD>
467  *      <TD WIDTH="31%">
468  *          <P ALIGN="CENTER">SJIS
469  *      </TD>
470  *  </TR>
471  *  <TR>
472  *      <TD WIDTH="33%">Chinese: Big5</TD>
473  *      <TD WIDTH="15%">
474  *          <P ALIGN="CENTER">Big5
475  *      </TD>
476  *      <TD WIDTH="12%">
477  *          <P ALIGN="CENTER">MIME
478  *      </TD>
479  *      <TD WIDTH="31%">
480  *          <P ALIGN="CENTER">Big5
481  *      </TD>
482  *  </TR>
483  *  <TR>
484  *      <TD WIDTH="33%">Extended Unix Code, packed for Korean</TD>
485  *      <TD WIDTH="15%">
486  *          <P ALIGN="CENTER">euc-kr
487  *      </TD>
488  *      <TD WIDTH="12%">
489  *          <P ALIGN="CENTER">MIME
490  *      </TD>
491  *      <TD WIDTH="31%">
492  *          <P ALIGN="CENTER">iso2022kr
493  *      </TD>
494  *  </TR>
495  *  <TR>
496  *      <TD WIDTH="33%">Cyrillic</TD>
497  *      <TD WIDTH="15%">
498  *          <P ALIGN="CENTER">koi8-r
499  *      </TD>
500  *      <TD WIDTH="12%">
501  *          <P ALIGN="CENTER">MIME
502  *      </TD>
503  *      <TD WIDTH="31%">
504  *          <P ALIGN="CENTER">koi8-r
505  *      </TD>
506  *  </TR>
507  * </TABLE>
508  * 
509  * @version
510  * @author TAMURA Kent <kent@trl.ibm.co.jp>
511  */
512 public class MIME2Java {
513     
514     static private Hashtable s_enchash;
515     static private Hashtable s_revhash;
516     
517     static {
518         s_enchash = new Hashtable();
519         //    <preferred MIME name>, <Java encoding name>
520         s_enchash.put("UTF-8", "UTF8");
521         s_enchash.put("US-ASCII",        "8859_1");    // ?
522         s_enchash.put("ISO-8859-1",      "8859_1");
523         s_enchash.put("ISO-8859-2",      "8859_2");
524         s_enchash.put("ISO-8859-3",      "8859_3");
525         s_enchash.put("ISO-8859-4",      "8859_4");
526         s_enchash.put("ISO-8859-5",      "8859_5");
527         s_enchash.put("ISO-8859-6",      "8859_6");
528         s_enchash.put("ISO-8859-7",      "8859_7");
529         s_enchash.put("ISO-8859-8",      "8859_8");
530         s_enchash.put("ISO-8859-9",      "8859_9");
531         s_enchash.put("ISO-2022-JP",     "JIS");
532         s_enchash.put("SHIFT_JIS",       "SJIS");
533         s_enchash.put("EUC-JP",          "EUCJIS");
534         s_enchash.put("GB2312",          "GB2312");
535         s_enchash.put("BIG5",            "Big5");
536         s_enchash.put("EUC-KR",          "KSC5601");
537         s_enchash.put("ISO-2022-KR",     "ISO2022KR");
538         s_enchash.put("KOI8-R",          "KOI8_R");
539 
540         s_enchash.put("EBCDIC-CP-US",    "CP037");
541         s_enchash.put("EBCDIC-CP-CA",    "CP037");
542         s_enchash.put("EBCDIC-CP-NL",    "CP037");
543         s_enchash.put("EBCDIC-CP-DK",    "CP277");
544         s_enchash.put("EBCDIC-CP-NO",    "CP277");
545         s_enchash.put("EBCDIC-CP-FI",    "CP278");
546         s_enchash.put("EBCDIC-CP-SE",    "CP278");
547         s_enchash.put("EBCDIC-CP-IT",    "CP280");
548         s_enchash.put("EBCDIC-CP-ES",    "CP284");
549         s_enchash.put("EBCDIC-CP-GB",    "CP285");
550         s_enchash.put("EBCDIC-CP-FR",    "CP297");
551         s_enchash.put("EBCDIC-CP-AR1",   "CP420");
552         s_enchash.put("EBCDIC-CP-HE",    "CP424");
553         s_enchash.put("EBCDIC-CP-CH",    "CP500");
554         s_enchash.put("EBCDIC-CP-ROECE", "CP870");
555         s_enchash.put("EBCDIC-CP-YU",    "CP870");
556         s_enchash.put("EBCDIC-CP-IS",    "CP871");
557         s_enchash.put("EBCDIC-CP-AR2",   "CP918");
558 
559                                                 // j:CNS11643 -> EUC-TW?
560                                                 // ISO-2022-CN? ISO-2022-CN-EXT?
561                                                 
562         s_revhash = new Hashtable();
563         //    <Java encoding name>, <preferred MIME name>
564         s_revhash.put("UTF8", "UTF-8");
565         //s_revhash.put("8859_1", "US-ASCII");    // ?
566         s_revhash.put("8859_1", "ISO-8859-1");
567         s_revhash.put("8859_2", "ISO-8859-2");
568         s_revhash.put("8859_3", "ISO-8859-3");
569         s_revhash.put("8859_4", "ISO-8859-4");
570         s_revhash.put("8859_5", "ISO-8859-5");
571         s_revhash.put("8859_6", "ISO-8859-6");
572         s_revhash.put("8859_7", "ISO-8859-7");
573         s_revhash.put("8859_8", "ISO-8859-8");
574         s_revhash.put("8859_9", "ISO-8859-9");
575         s_revhash.put("JIS", "ISO-2022-JP");
576         s_revhash.put("SJIS", "Shift_JIS");
577         s_revhash.put("EUCJIS", "EUC-JP");
578         s_revhash.put("GB2312", "GB2312");
579         s_revhash.put("BIG5", "Big5");
580         s_revhash.put("KSC5601", "EUC-KR");
581         s_revhash.put("ISO2022KR", "ISO-2022-KR");
582         s_revhash.put("KOI8_R", "KOI8-R");
583 
584         s_revhash.put("CP037", "EBCDIC-CP-US");
585         s_revhash.put("CP037", "EBCDIC-CP-CA");
586         s_revhash.put("CP037", "EBCDIC-CP-NL");
587         s_revhash.put("CP277", "EBCDIC-CP-DK");
588         s_revhash.put("CP277", "EBCDIC-CP-NO");
589         s_revhash.put("CP278", "EBCDIC-CP-FI");
590         s_revhash.put("CP278", "EBCDIC-CP-SE");
591         s_revhash.put("CP280", "EBCDIC-CP-IT");
592         s_revhash.put("CP284", "EBCDIC-CP-ES");
593         s_revhash.put("CP285", "EBCDIC-CP-GB");
594         s_revhash.put("CP297", "EBCDIC-CP-FR");
595         s_revhash.put("CP420", "EBCDIC-CP-AR1");
596         s_revhash.put("CP424", "EBCDIC-CP-HE");
597         s_revhash.put("CP500", "EBCDIC-CP-CH");
598         s_revhash.put("CP870", "EBCDIC-CP-ROECE");
599         s_revhash.put("CP870", "EBCDIC-CP-YU");
600         s_revhash.put("CP871", "EBCDIC-CP-IS");
601         s_revhash.put("CP918", "EBCDIC-CP-AR2");
602     }
603 
604     private MIME2Java() {
605     }
606 
607     /**
608      * Convert a MIME charset name, also known as an XML encoding name, to a Java encoding name.
609      * @param   mimeCharsetName Case insensitive MIME charset name: <code>UTF-8, US-ASCII, ISO-8859-1,
610      *                          ISO-8859-2, ISO-8859-3, ISO-8859-4, ISO-8859-5, ISO-8859-6,
611      *                          ISO-8859-7, ISO-8859-8, ISO-8859-9, ISO-2022-JP, Shift_JIS, 
612      *                          EUC-JP, GB2312, Big5, EUC-KR, ISO-2022-KR, KOI8-R,
613      *                          EBCDIC-CP-US, EBCDIC-CP-CA, EBCDIC-CP-NL, EBCDIC-CP-DK,
614      *                          EBCDIC-CP-NO, EBCDIC-CP-FI, EBCDIC-CP-SE, EBCDIC-CP-IT,
615      *                          EBCDIC-CP-ES, EBCDIC-CP-GB, EBCDIC-CP-FR, EBCDIC-CP-AR1,
616      *                          EBCDIC-CP-HE, EBCDIC-CP-CH, EBCDIC-CP-ROECE, EBCDIC-CP-YU,
617      *                          EBCDIC-CP-IS and EBCDIC-CP-AR2</code>.
618      * @return                  Java encoding name, or <var>null</var> if <var>mimeCharsetName</var>
619      *                          is unknown.
620      * @see #reverse
621      */
622     public static String convert(String mimeCharsetName) {
623         return (String)s_enchash.get(mimeCharsetName.toUpperCase());
624     }
625 
626     /**
627      * Convert a Java encoding name to MIME charset name.
628      * Available values of <i>encoding</i> are "UTF8", "8859_1", "8859_2", "8859_3", "8859_4",
629      * "8859_5", "8859_6", "8859_7", "8859_8", "8859_9", "JIS", "SJIS", "EUCJIS",
630      * "GB2312", "BIG5", "KSC5601", "ISO2022KR",  "KOI8_R", "CP037", "CP277", "CP278",
631      * "CP280", "CP284", "CP285", "CP297", "CP420", "CP424", "CP500", "CP870", "CP871" and "CP918".
632      * @param   encoding    Case insensitive Java encoding name: <code>UTF8, 8859_1, 8859_2, 8859_3,
633      *                      8859_4, 8859_5, 8859_6, 8859_7, 8859_8, 8859_9, JIS, SJIS, EUCJIS,
634      *                      GB2312, BIG5, KSC5601, ISO2022KR, KOI8_R, CP037, CP277, CP278,
635      *                      CP280, CP284, CP285, CP297, CP420, CP424, CP500, CP870, CP871 
636      *                      and CP918</code>.
637      * @return              MIME charset name, or <var>null</var> if <var>encoding</var> is unknown.
638      * @see #convert
639      */
640     public static String reverse(String encoding) {
641         return (String)s_revhash.get(encoding.toUpperCase());
642     }
643 }