J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2002-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | */ |
| 28 | |
| 29 | package sun.nio.cs.ext; |
| 30 | |
| 31 | import java.nio.charset.Charset; |
| 32 | import java.nio.ByteBuffer; |
| 33 | import java.nio.CharBuffer; |
| 34 | import java.nio.charset.CharsetDecoder; |
| 35 | import java.nio.charset.CharsetEncoder; |
| 36 | import java.nio.charset.CoderResult; |
| 37 | import sun.nio.cs.HistoricallyNamedCharset; |
| 38 | |
| 39 | public class ISO2022_CN_GB extends ISO2022 implements HistoricallyNamedCharset |
| 40 | { |
| 41 | public ISO2022_CN_GB() { |
| 42 | super("x-ISO-2022-CN-GB", |
| 43 | ExtendedCharsets.aliasesFor("x-ISO-2022-CN-GB")); |
| 44 | } |
| 45 | |
| 46 | public boolean contains(Charset cs) { |
| 47 | // overlapping repertoire of EUC_CN, GB2312 |
| 48 | return ((cs instanceof EUC_CN) || |
| 49 | (cs.name().equals("US-ASCII")) || |
| 50 | (cs instanceof ISO2022_CN_GB)); |
| 51 | } |
| 52 | |
| 53 | public String historicalName() { |
| 54 | return "ISO2022CN_GB"; |
| 55 | } |
| 56 | |
| 57 | public CharsetDecoder newDecoder() { |
| 58 | return new ISO2022_CN.Decoder(this); |
| 59 | } |
| 60 | |
| 61 | public CharsetEncoder newEncoder() { |
| 62 | return new Encoder(this); |
| 63 | } |
| 64 | |
| 65 | private static class Encoder extends ISO2022.Encoder { |
| 66 | |
| 67 | public Encoder(Charset cs) |
| 68 | { |
| 69 | super(cs); |
| 70 | SODesig = "$)A"; |
| 71 | |
| 72 | try { |
| 73 | Charset cset = Charset.forName("EUC_CN"); // GB2312 |
| 74 | ISOEncoder = cset.newEncoder(); |
| 75 | } catch (Exception e) { } |
| 76 | } |
| 77 | |
| 78 | /* |
| 79 | * Since ISO2022-CN-GB possesses a CharsetEncoder |
| 80 | * without the corresponding CharsetDecoder half the |
| 81 | * default replacement check needs to be overridden |
| 82 | * since the parent class version attempts to |
| 83 | * decode 0x3f (?). |
| 84 | */ |
| 85 | |
| 86 | public boolean isLegalReplacement(byte[] repl) { |
| 87 | // 0x3f is OK as the replacement byte |
| 88 | return (repl.length == 1 && repl[0] == (byte) 0x3f); |
| 89 | } |
| 90 | } |
| 91 | } |