/* ====================================================================
* Copyright (c) 2006 J.T. Beetstra
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
* ====================================================================
*/
package com.beetstra.jutf7;
import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
/**
* <p>
* Charset service-provider class used for both variants of the UTF-7 charset
* and the modified-UTF-7 charset.
* </p>
*
* @author Jaap Beetstra
*/
public class CharsetProvider extends java.nio.charset.spi.CharsetProvider {
private static final String UTF7_NAME = "UTF-7";
private static final String UTF7_O_NAME = "X-UTF-7-OPTIONAL";
private static final String UTF7_M_NAME = "X-MODIFIED-UTF-7";
private static final String[] UTF7_ALIASES = new String[] {
"UNICODE-1-1-UTF-7", "CSUNICODE11UTF7", "X-RFC2152", "X-RFC-2152"
};
private static final String[] UTF7_O_ALIASES = new String[] {
"X-RFC2152-OPTIONAL", "X-RFC-2152-OPTIONAL"
};
private static final String[] UTF7_M_ALIASES = new String[] {
"X-IMAP-MODIFIED-UTF-7", "X-IMAP4-MODIFIED-UTF7", "X-IMAP4-MODIFIED-UTF-7",
"X-RFC3501", "X-RFC-3501"
};
private Charset utf7charset = new UTF7Charset(UTF7_NAME, UTF7_ALIASES, false);
private Charset utf7oCharset = new UTF7Charset(UTF7_O_NAME, UTF7_O_ALIASES, true);
private Charset imap4charset = new ModifiedUTF7Charset(UTF7_M_NAME, UTF7_M_ALIASES);
private List<Charset> charsets;
public CharsetProvider() {
charsets = Arrays.asList(new Charset[] {
utf7charset, imap4charset, utf7oCharset
});
}
/**
* {@inheritDoc}
*/
@Override
public Charset charsetForName(String charsetName) {
charsetName = charsetName.toUpperCase();
for (Iterator<Charset> iter = charsets.iterator(); iter.hasNext();) {
Charset charset = iter.next();
if (charset.name().equals(charsetName))
return charset;
}
for (Iterator<Charset> iter = charsets.iterator(); iter.hasNext();) {
Charset charset = iter.next();
if (charset.aliases().contains(charsetName))
return charset;
}
return null;
}
/**
* {@inheritDoc}
*/
@Override
public Iterator<Charset> charsets() {
return charsets.iterator();
}
}