58 lines
2.1 KiB
Java
58 lines
2.1 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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/**
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* <p>
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* The character set specified in RFC 3501 to use for IMAP4rev1 mailbox name
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* encoding.
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* </p>
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*
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* @see <a href="http://tools.ietf.org/html/rfc3501">RFC 3501< /a>
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* @author Jaap Beetstra
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*/
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class ModifiedUTF7Charset extends UTF7StyleCharset {
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private static final String MODIFIED_BASE64_ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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+ "abcdefghijklmnopqrstuvwxyz" + "0123456789+,";
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ModifiedUTF7Charset(String name, String[] aliases) {
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super(name, aliases, MODIFIED_BASE64_ALPHABET, true);
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}
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boolean canEncodeDirectly(char ch) {
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if (ch == shift())
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return false;
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return ch >= 0x20 && ch <= 0x7E;
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}
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byte shift() {
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return '&';
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}
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byte unshift() {
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return '-';
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}
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}
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