encodingmap.java

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/*
 * Copyright 1999-2002,2004 The Apache Software Foundation.
 * 
 * Licensed 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 com.sun.org.apache.xerces.internal.util;

import java.util.Hashtable;

/**
 * EncodingMap is a convenience class which handles conversions between 
 * IANA encoding names and Java encoding names, and vice versa. The
 * encoding names used in XML instance documents <strong>must</strong>
 * be the IANA encoding names specified or one of the aliases for those names
 * which IANA defines.
 * <p>
 * <TABLE BORDER="0" WIDTH="100%">
 *  <TR>
 *      <TD WIDTH="33%">
 *          <P ALIGN="CENTER"><B>Common Name</B>
 *      </TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER"><B>Use this name in XML files</B>
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER"><B>Name Type</B>
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER"><B>Xerces converts to this Java Encoder Name</B>
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">8 bit Unicode</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">UTF-8
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">UTF8
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin 1</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-1
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-1
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin 2</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-2
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-2
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin 3</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-3
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-3
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin 4</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-4
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-4
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin Cyrillic</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-5
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-5
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin Arabic</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-6
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-6
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin Greek</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-7
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-7
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin Hebrew</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-8
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-8
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin 5</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-9
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-9
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: US</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-us
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp037
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Canada</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-ca
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp037
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Netherlands</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-nl
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp037
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Denmark</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-dk
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp277
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Norway</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-no
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp277
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Finland</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-fi
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp278
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Sweden</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-se
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp278
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Italy</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-it
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp280
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Spain, Latin America</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-es
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp284
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Great Britain</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-gb
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp285
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: France</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-fr
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp297
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Arabic</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-ar1
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp420
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Hebrew</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-he
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp424
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Switzerland</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-ch
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp500
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Roece</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-roece
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp870
 *      </TD>
 *  </TR>
 *  <TR>