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From ggreg...@apache.org
Subject cvs commit: jakarta-commons/lang/src/java/org/apache/commons/lang CharacterEncoding.java
Date Tue, 03 Aug 2004 17:15:32 GMT
ggregory    2004/08/03 10:15:32

  Added:       lang/src/java/org/apache/commons/lang CharacterEncoding.java
  Log:
  Bugzilla Bug 30334
  	[lang] New class proposal: CharacterEncoding
  	http://issues.apache.org/bugzilla/show_bug.cgi?id=30334
  	Comitted to CVS for further comments.
  
  Revision  Changes    Path
  1.1                  jakarta-commons/lang/src/java/org/apache/commons/lang/CharacterEncoding.java
  
  Index: CharacterEncoding.java
  ===================================================================
  /*
   * Copyright 2001-2004 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 org.apache.commons.lang;
  
  import java.io.UnsupportedEncodingException;
  
  /**
   * TODO: Accept/Reject for 2.1.
   * 
   * Character encoding names required of every implementation of the Java platform.
   * 
   * According to the Java documentation <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>
   * 
   * @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: CharacterEncoding.java,v 1.1 2004/08/03 17:15:32 ggregory Exp $
   */
  public class CharacterEncoding {
  
      /**
       * <p>
       * ISO Latin Alphabet No. 1, a.k.a. 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;
      }
  
  }
  
  

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