| /* |
| * 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 org.apache.commons.lang; |
| |
| import java.io.UnsupportedEncodingException; |
| |
| /** |
| * <p> |
| * Character encoding names required of every implementation of the Java platform. |
| * </p> |
| * |
| * <p> |
| * According to <a href="http://java.sun.com/j2se/1.3/docs/api/java/lang/package-summary.html#charenc">JRE character |
| * encoding names</a>: |
| * <p> |
| * <cite>Every implementation of the Java platform is required to support the following character encodings. Consult the |
| * release documentation for your implementation to see if any other encodings are supported.</cite> |
| * </p> |
| * </p> |
| * |
| * @see <a href="http://java.sun.com/j2se/1.3/docs/api/java/lang/package-summary.html#charenc">JRE character encoding |
| * names</a> |
| * @author Apache Software Foundation |
| * @since 2.1 |
| * @version $Id$ |
| */ |
| public class CharEncoding { |
| |
| /** |
| * <p> |
| * ISO Latin Alphabet #1, also known as ISO-LATIN-1. |
| * </p> |
| * <p> |
| * Every implementation of the Java platform is required to support this character encoding. |
| * </p> |
| * |
| * @see <a href="http://java.sun.com/j2se/1.3/docs/api/java/lang/package-summary.html#charenc">JRE character |
| * encoding names</a> |
| */ |
| public static final String ISO_8859_1 = "ISO-8859-1"; |
| |
| /** |
| * <p> |
| * Seven-bit ASCII, also known as ISO646-US, also known as the Basic Latin block of the Unicode character set. |
| * </p> |
| * <p> |
| * Every implementation of the Java platform is required to support this character encoding. |
| * </p> |
| * |
| * @see <a href="http://java.sun.com/j2se/1.3/docs/api/java/lang/package-summary.html#charenc">JRE character |
| * encoding names</a> |
| */ |
| public static final String US_ASCII = "US-ASCII"; |
| |
| /** |
| * <p> |
| * Sixteen-bit Unicode Transformation Format, byte order specified by a mandatory initial byte-order mark (either |
| * order accepted on input, big-endian used on output). |
| * </p> |
| * <p> |
| * Every implementation of the Java platform is required to support this character encoding. |
| * </p> |
| * |
| * @see <a href="http://java.sun.com/j2se/1.3/docs/api/java/lang/package-summary.html#charenc">JRE character |
| * encoding names</a> |
| */ |
| public static final String UTF_16 = "UTF-16"; |
| |
| /** |
| * <p> |
| * Sixteen-bit Unicode Transformation Format, big-endian byte order. |
| * </p> |
| * <p> |
| * Every implementation of the Java platform is required to support this character encoding. |
| * </p> |
| * |
| * @see <a href="http://java.sun.com/j2se/1.3/docs/api/java/lang/package-summary.html#charenc">JRE character |
| * encoding names</a> |
| */ |
| public static final String UTF_16BE = "UTF-16BE"; |
| |
| /** |
| * <p> |
| * Sixteen-bit Unicode Transformation Format, little-endian byte order. |
| * </p> |
| * <p> |
| * Every implementation of the Java platform is required to support this character encoding. |
| * </p> |
| * |
| * @see <a href="http://java.sun.com/j2se/1.3/docs/api/java/lang/package-summary.html#charenc">JRE character |
| * encoding names</a> |
| */ |
| public static final String UTF_16LE = "UTF-16LE"; |
| |
| /** |
| * <p> |
| * Eight-bit Unicode Transformation Format. |
| * </p> |
| * <p> |
| * Every implementation of the Java platform is required to support this character encoding. |
| * </p> |
| * |
| * @see <a href="http://java.sun.com/j2se/1.3/docs/api/java/lang/package-summary.html#charenc">JRE character |
| * encoding names</a> |
| */ |
| public static final String UTF_8 = "UTF-8"; |
| |
| /** |
| * <p> |
| * Returns whether the named charset is supported. |
| * </p> |
| * <p> |
| * This is similar to <a |
| * href="http://java.sun.com/j2se/1.4.2/docs/api/java/nio/charset/Charset.html#isSupported(java.lang.String)"> |
| * java.nio.charset.Charset.isSupported(String)</a> |
| * </p> |
| * |
| * @param name |
| * the name of the requested charset; may be either a canonical name or an alias |
| * @return <code>true</code> if, and only if, support for the named charset is available in the current Java |
| * virtual machine |
| * |
| * @see <a href="http://java.sun.com/j2se/1.3/docs/api/java/lang/package-summary.html#charenc">JRE character |
| * encoding names</a> |
| */ |
| public static boolean isSupported(String name) { |
| if (name == null) { |
| return false; |
| } |
| try { |
| new String(ArrayUtils.EMPTY_BYTE_ARRAY, name); |
| } catch (UnsupportedEncodingException e) { |
| return false; |
| } |
| return true; |
| } |
| |
| } |