001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 * 
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 * 
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.commons.codec;
019
020/**
021 * Character encoding names required of every implementation of the Java platform.
022 * 
023 * From the Java documentation <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/nio/charset/Charset.html">Standard
024 * charsets</a>:
025 * <p>
026 * <cite>Every implementation of the Java platform is required to support the following character encodings. Consult the
027 * release documentation for your implementation to see if any other encodings are supported. Consult the release
028 * documentation for your implementation to see if any other encodings are supported. </cite>
029 * </p>
030 * 
031 * <ul>
032 * <li><code>US-ASCII</code><br/>
033 * Seven-bit ASCII, a.k.a. ISO646-US, a.k.a. the Basic Latin block of the Unicode character set.</li>
034 * <li><code>ISO-8859-1</code><br/>
035 * ISO Latin Alphabet No. 1, a.k.a. ISO-LATIN-1.</li>
036 * <li><code>UTF-8</code><br/>
037 * Eight-bit Unicode Transformation Format.</li>
038 * <li><code>UTF-16BE</code><br/>
039 * Sixteen-bit Unicode Transformation Format, big-endian byte order.</li>
040 * <li><code>UTF-16LE</code><br/>
041 * Sixteen-bit Unicode Transformation Format, little-endian byte order.</li>
042 * <li><code>UTF-16</code><br/>
043 * Sixteen-bit Unicode Transformation Format, byte order specified by a mandatory initial byte-order mark (either order
044 * accepted on input, big-endian used on output.)</li>
045 * </ul>
046 * 
047 * This perhaps would best belong in the [lang] project. Even if a similar interface is defined in [lang], it is not
048 * forseen that [codec] would be made to depend on [lang].
049 * 
050 * @see <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
051 * @author Apache Software Foundation
052 * @since 1.4
053 * @version $Id: CharEncoding.java 797857 2009-07-25 23:43:33Z ggregory $
054 */
055public class CharEncoding {
056    /**
057     * CharEncodingISO Latin Alphabet No. 1, a.k.a. ISO-LATIN-1. </p>
058     * <p>
059     * Every implementation of the Java platform is required to support this character encoding.
060     * </p>
061     * 
062     * @see <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
063     */
064    public static final String ISO_8859_1 = "ISO-8859-1";
065
066    /**
067     * <p>
068     * Seven-bit ASCII, also known as ISO646-US, also known as the Basic Latin block of the Unicode character set.
069     * </p>
070     * <p>
071     * Every implementation of the Java platform is required to support this character encoding.
072     * </p>
073     * 
074     * @see <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
075     */
076    public static final String US_ASCII = "US-ASCII";
077
078    /**
079     * <p>
080     * Sixteen-bit Unicode Transformation Format, The byte order specified by a mandatory initial byte-order mark
081     * (either order accepted on input, big-endian used on output)
082     * </p>
083     * <p>
084     * Every implementation of the Java platform is required to support this character encoding.
085     * </p>
086     * 
087     * @see <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
088     */
089    public static final String UTF_16 = "UTF-16";
090
091    /**
092     * <p>
093     * Sixteen-bit Unicode Transformation Format, big-endian byte order.
094     * </p>
095     * <p>
096     * Every implementation of the Java platform is required to support this character encoding.
097     * </p>
098     * 
099     * @see <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
100     */
101    public static final String UTF_16BE = "UTF-16BE";
102
103    /**
104     * <p>
105     * Sixteen-bit Unicode Transformation Format, little-endian byte order.
106     * </p>
107     * <p>
108     * Every implementation of the Java platform is required to support this character encoding.
109     * </p>
110     * 
111     * @see <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
112     */
113    public static final String UTF_16LE = "UTF-16LE";
114
115    /**
116     * <p>
117     * Eight-bit Unicode Transformation Format.
118     * </p>
119     * <p>
120     * Every implementation of the Java platform is required to support this character encoding.
121     * </p>
122     * 
123     * @see <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
124     */
125    public static final String UTF_8 = "UTF-8";
126}