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