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annotate src/org/tn5250j/encoding/JavaCodePageFactory.java @ 257:8a6c7c7ffe0d

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author Carl Byington <carl@five-ten-sg.com>
date Mon, 14 Jul 2014 14:25:03 -0700
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1 /**
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2 * Title: JavaCodePage
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3 * Copyright: Copyright (c) 2001, 2002, 2003
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4 * Company:
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5 * @author LDC, WVL, Luc, master_jaf
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6 * @version 0.4
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7 *
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8 * Description:
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9 *
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10 * This program is free software; you can redistribute it and/or modify
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11 * it under the terms of the GNU General Public License as published by
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12 * the Free Software Foundation; either version 2, or (at your option)
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13 * any later version.
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14 *
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15 * This program is distributed in the hope that it will be useful,
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16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 * GNU General Public License for more details.
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19 *
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20 * You should have received a copy of the GNU General Public License
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21 * along with this software; see the file COPYING. If not, write to
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22 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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23 * Boston, MA 02111-1307 USA
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24 *
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25 */
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26 package org.tn5250j.encoding;
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27
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28 import java.nio.ByteBuffer;
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29 import java.nio.CharBuffer;
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30 import java.nio.charset.Charset;
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31 import java.nio.charset.CharsetDecoder;
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32 import java.nio.charset.CharsetEncoder;
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33
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34 /* package */ class JavaCodePageFactory extends AbstractCodePage {
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36 private final CharsetEncoder encoder;
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37 private final CharsetDecoder decoder;
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39 /* package */ JavaCodePageFactory(String encoding, CharsetEncoder encoder, CharsetDecoder decoder) {
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40 super(encoding);
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41 this.encoder = encoder;
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42 this.decoder = decoder;
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43 }
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44
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45 /* (non-Javadoc)
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46 * @see org.tn5250j.encoding.CodePage#ebcdic2uni(int)
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47 */
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48 public char ebcdic2uni(int codepoint) {
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49 try {
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50 final ByteBuffer in = ByteBuffer.wrap(new byte[] { (byte) codepoint });
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51 final CharBuffer out = this.decoder.decode(in);
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52 return out.get(0);
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53 }
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54 catch (Exception cce) {
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55 return ' ';
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56 }
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57 }
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59 /* (non-Javadoc)
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60 * @see org.tn5250j.encoding.CodePage#uni2ebcdic(char)
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61 */
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62 public byte uni2ebcdic(char character) {
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63 try {
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64 final CharBuffer in = CharBuffer.wrap(new char[] {character});
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65 final ByteBuffer out = this.encoder.encode(in);
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66 return out.get(0);
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67 }
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68 catch (Exception cce) {
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69 return 0x0;
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70 }
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71 }
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73 /**
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74 * @param encoding
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75 * @return A new {@link CodePage} object OR null, if not available.
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76 */
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77 /* package */ static ICodePage getCodePage(final String encoding) {
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78 CharsetDecoder dec = null;
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79 CharsetEncoder enc = null;
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80
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81 try {
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82 final Charset cs = java.nio.charset.Charset.forName(encoding);
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83 dec = cs.newDecoder();
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84 enc = cs.newEncoder();
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85 }
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86 catch (Exception e) {
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87 enc = null;
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88 dec = null;
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89 }
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90
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91 if ((enc != null) && (dec != null)) {
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92 return new JavaCodePageFactory(encoding, enc, dec);
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93 }
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94
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95 return null;
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96 }
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97
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98 }