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_CNS extends ISO2022 implements HistoricallyNamedCharset 40 { 41 public ISO2022_CN_CNS() { 42 super("x-ISO-2022-CN-CNS", ExtendedCharsets.aliasesFor("x-ISO-2022-CN-CNS")); 43 } 44 45 public boolean contains(Charset cs) { 46 // overlapping repertoire of EUC_TW, CNS11643 47 return ((cs instanceof EUC_TW) || 48 (cs.name().equals("US-ASCII")) || 49 (cs instanceof ISO2022_CN_CNS)); 50 } 51 52 public String historicalName() { 53 return "ISO2022CN_CNS"; 54 } 55 56 public CharsetDecoder newDecoder() { 57 return new ISO2022_CN.Decoder(this); 58 } 59 60 public CharsetEncoder newEncoder() { 61 return new Encoder(this); 62 } 63 64 private static class Encoder extends ISO2022.Encoder { 65 66 public Encoder(Charset cs) 67 { 68 super(cs); 69 SODesig = "$)G"; 70 SS2Desig = "$*H"; 71 SS3Desig = "$+I"; 72 73 try { 74 Charset cset = Charset.forName("EUC_TW"); // CNS11643 75 ISOEncoder = cset.newEncoder(); 76 } catch (Exception e) { } 77 } 78 79 /* 80 * Since ISO2022-CN-CNS possesses a CharsetEncoder 81 * without the corresponding CharsetDecoder half the 82 * default replacement check needs to be overridden 83 * since the parent class version attempts to 84 * decode 0x3f (?). 85 */ 86 87 public boolean isLegalReplacement(byte[] repl) { 88 // 0x3f is OK as the replacement byte 89 return (repl.length == 1 && repl[0] == (byte) 0x3f); 90 } 91 } 92 }