info.monitorenter.cpdetector.io.UnknownCharset Maven / Gradle / Ivy
/*
* UnknownCharset.java cpdetector
* Copyright (C) Achim Westermann, created on 26.09.2004, 03:15:15
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this collection are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the cpDetector code in [sub] packages info.monitorenter and
* cpdetector.
*
* The Initial Developer of the Original Code is
* Achim Westermann .
*
* Portions created by the Initial Developer are Copyright (c) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** *
*
* If you modify or optimize the code in a useful way please let me know.
* [email protected]
*/
package info.monitorenter.cpdetector.io;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
/**
* A singleton Charset indicating that no encoding could be detected at all (regardless wether supported by platform or
* not). Unlike the {@link UnsupportedCharset} singleton instances it will never equal anything.
*
*
* @author Achim Westermann
*
*/
public class UnknownCharset extends Charset {
private static Charset instance;
/**
* @param canonicalName
* @param aliases
*/
private UnknownCharset() {
super("void", null);
}
public static Charset getInstance() {
if (instance == null) {
instance = new UnknownCharset();
}
return instance;
}
/*
* (non-Javadoc)
*
* @see java.nio.charset.Charset#contains(java.nio.charset.Charset)
*/
public boolean contains(Charset cs) {
return false;
}
/*
* (non-Javadoc)
*
* @see java.nio.charset.Charset#newDecoder()
*/
public CharsetDecoder newDecoder() {
throw new UnsupportedOperationException(
"This is no real Charset but a flag you should test for!");
}
/*
* (non-Javadoc)
*
* @see java.nio.charset.Charset#newEncoder()
*/
public CharsetEncoder newEncoder() {
throw new UnsupportedOperationException(
"This is no real Charset but a flag you should test for!");
}
}