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annotate src/org/tn5250j/encoding/builtin/CodepageConverterAdapter.java @ 417:4dcc071e1feb

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monitor failure should not kill the TE
author Carl Byington <carl@five-ten-sg.com>
date Wed, 29 Oct 2014 12:12:48 -0700
parents 77ac18bc1b2f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /**
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2 * $Id$
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3 *
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4 * Title: tn5250J
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5 * Copyright: Copyright (c) 2001,2009
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6 * Company:
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7 * @author: master_jaf
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8 *
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9 * Description:
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10 *
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11 * This program is free software; you can redistribute it and/or modify
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12 * it under the terms of the GNU General Public License as published by
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13 * the Free Software Foundation; either version 2, or (at your option)
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14 * any later version.
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15 *
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16 * This program is distributed in the hope that it will be useful,
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17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 * GNU General Public License for more details.
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20 *
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21 * You should have received a copy of the GNU General Public License
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22 * along with this software; see the file COPYING. If not, write to
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23 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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24 * Boston, MA 02111-1307 USA
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25 *
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26 */
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27 package org.tn5250j.encoding.builtin;
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29 import java.util.Arrays;
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30
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31 /**
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32 * Adapter class for converters using 8bit codepages.
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33 *
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34 * @author master_jaf
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35 */
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36 public abstract class CodepageConverterAdapter implements ICodepageConverter {
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37
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38 private char[] codepage = null;
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39 private int[] reverse_codepage = null;
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40
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41 /* (non-Javadoc)
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42 * @see org.tn5250j.cp.ICodepageConverter#init()
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43 */
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44 public ICodepageConverter init() {
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45 codepage = getCodePage();
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46 int size = 0;
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47
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48 for (int i = 0; i < codepage.length; i++) {
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49 size = Math.max(size, codepage[i]);
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50 }
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51
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52 assert(size + 1) < 1024 * 1024; // some kind of maximum size limiter.
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53 reverse_codepage = new int[size + 1];
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54 Arrays.fill(reverse_codepage, '?');
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55
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56 for (int i = 0; i < codepage.length; i++) {
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57 reverse_codepage[codepage[i]] = i;
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58 }
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59
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60 return this;
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61 }
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62
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63 /* (non-Javadoc)
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64 * @see org.tn5250j.cp.ICodepageConverter#uni2ebcdic(char)
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65 */
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66 public byte uni2ebcdic(char index) {
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67 assert index < reverse_codepage.length;
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68 return (byte)reverse_codepage[index];
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69 }
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70
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71 /* (non-Javadoc)
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72 * @see org.tn5250j.cp.ICodepageConverter#ebcdic2uni(int)
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73 */
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74 public char ebcdic2uni(int index) {
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75 index = index & 0xFF;
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76 assert index < 256;
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77 return codepage[index];
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78 }
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79
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80 /**
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81 * @return The oringal 8bit codepage.
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82 */
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83 protected abstract char[] getCodePage();
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84
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85 }