/*

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 net.mapeadores.util.css.util;

import java.util.HashMap;
import java.util.Map;


/**
 * This class contains utility functions to manage encodings.
 *
 * @author <a href="mailto:stephane@hillion.org">Stephane Hillion</a>
 * @version $Id: EncodingUtilities.java 478169 2006-11-22 14:23:24Z dvholten $
 */
public class EncodingUtilities {

    /**
     * The standard to Java encoding table.
     */
    protected static final Map<String, String> ENCODINGS = new HashMap<String, String>();

    static {
        ENCODINGS.put("UTF-8", "UTF8");
        ENCODINGS.put("UTF-16", "Unicode");
        ENCODINGS.put("US-ASCII", "ASCII");

        ENCODINGS.put("ISO-8859-1", "8859_1");
        ENCODINGS.put("ISO-8859-2", "8859_2");
        ENCODINGS.put("ISO-8859-3", "8859_3");
        ENCODINGS.put("ISO-8859-4", "8859_4");
        ENCODINGS.put("ISO-8859-5", "8859_5");
        ENCODINGS.put("ISO-8859-6", "8859_6");
        ENCODINGS.put("ISO-8859-7", "8859_7");
        ENCODINGS.put("ISO-8859-8", "8859_8");
        ENCODINGS.put("ISO-8859-9", "8859_9");
        ENCODINGS.put("ISO-2022-JP", "JIS");

        ENCODINGS.put("WINDOWS-31J", "MS932");
        ENCODINGS.put("EUC-JP", "EUCJIS");
        ENCODINGS.put("GB2312", "GB2312");
        ENCODINGS.put("BIG5", "Big5");
        ENCODINGS.put("EUC-KR", "KSC5601");
        ENCODINGS.put("ISO-2022-KR", "ISO2022KR");
        ENCODINGS.put("KOI8-R", "KOI8_R");

        ENCODINGS.put("EBCDIC-CP-US", "Cp037");
        ENCODINGS.put("EBCDIC-CP-CA", "Cp037");
        ENCODINGS.put("EBCDIC-CP-NL", "Cp037");
        ENCODINGS.put("EBCDIC-CP-WT", "Cp037");
        ENCODINGS.put("EBCDIC-CP-DK", "Cp277");
        ENCODINGS.put("EBCDIC-CP-NO", "Cp277");
        ENCODINGS.put("EBCDIC-CP-FI", "Cp278");
        ENCODINGS.put("EBCDIC-CP-SE", "Cp278");
        ENCODINGS.put("EBCDIC-CP-IT", "Cp280");
        ENCODINGS.put("EBCDIC-CP-ES", "Cp284");
        ENCODINGS.put("EBCDIC-CP-GB", "Cp285");
        ENCODINGS.put("EBCDIC-CP-FR", "Cp297");
        ENCODINGS.put("EBCDIC-CP-AR1", "Cp420");
        ENCODINGS.put("EBCDIC-CP-HE", "Cp424");
        ENCODINGS.put("EBCDIC-CP-BE", "Cp500");
        ENCODINGS.put("EBCDIC-CP-CH", "Cp500");
        ENCODINGS.put("EBCDIC-CP-ROECE", "Cp870");
        ENCODINGS.put("EBCDIC-CP-YU", "Cp870");
        ENCODINGS.put("EBCDIC-CP-IS", "Cp871");
        ENCODINGS.put("EBCDIC-CP-AR2", "Cp918");

        ENCODINGS.put("CP1252", "Cp1252");
    }

    /**
     * This class does not need to be instantiated.
     */
    protected EncodingUtilities() {
    }

    /**
     * Returns the Java encoding string mapped with the given standard encoding
     * string.
     *
     * @return null if no mapping was found.
     */
    public static String javaEncoding(String encoding) {
        return (String) ENCODINGS.get(encoding.toUpperCase());
    }

}
