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annotate src/org/tn5250j/encoding/BuiltInCodePageFactory.java @ 266:c922a60043db
update documentation
author | Carl Byington <carl@five-ten-sg.com> |
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date | Wed, 16 Jul 2014 12:40:48 -0700 |
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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) 2001,2012 |
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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; |
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28 |
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29 import java.lang.reflect.Constructor; |
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30 import java.util.ArrayList; |
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31 import java.util.HashSet; |
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32 import java.util.List; |
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33 |
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34 import org.tn5250j.encoding.builtin.CCSID1025; |
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35 import org.tn5250j.encoding.builtin.CCSID1026; |
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36 import org.tn5250j.encoding.builtin.CCSID1112; |
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37 import org.tn5250j.encoding.builtin.CCSID1140; |
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38 import org.tn5250j.encoding.builtin.CCSID1141; |
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39 import org.tn5250j.encoding.builtin.CCSID1147; |
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40 import org.tn5250j.encoding.builtin.CCSID1148; |
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41 import org.tn5250j.encoding.builtin.CCSID273; |
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42 import org.tn5250j.encoding.builtin.CCSID277; |
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43 import org.tn5250j.encoding.builtin.CCSID278; |
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44 import org.tn5250j.encoding.builtin.CCSID280; |
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45 import org.tn5250j.encoding.builtin.CCSID284; |
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46 import org.tn5250j.encoding.builtin.CCSID285; |
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47 import org.tn5250j.encoding.builtin.CCSID297; |
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48 import org.tn5250j.encoding.builtin.CCSID37; |
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49 import org.tn5250j.encoding.builtin.CCSID424; |
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50 import org.tn5250j.encoding.builtin.CCSID500; |
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51 import org.tn5250j.encoding.builtin.CCSID870; |
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52 import org.tn5250j.encoding.builtin.CCSID871; |
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53 import org.tn5250j.encoding.builtin.CCSID875; |
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54 import org.tn5250j.encoding.builtin.ICodepageConverter; |
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55 import android.util.Log; |
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56 |
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57 |
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58 /** |
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59 * Methods for built-in code page support. |
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60 */ |
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61 class BuiltInCodePageFactory { |
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62 private static final String TAG = "BuiltInCodePageFactory"; |
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63 private static BuiltInCodePageFactory singleton; |
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64 |
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65 private final List<Class<?>> clazzes = new ArrayList<Class<?>>(); |
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66 |
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67 |
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68 private BuiltInCodePageFactory() { |
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69 register(); |
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70 } |
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71 |
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72 public static synchronized final BuiltInCodePageFactory getInstance() { |
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73 if (singleton == null) { |
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74 singleton = new BuiltInCodePageFactory(); |
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75 } |
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76 |
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77 return singleton; |
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78 } |
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79 |
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80 private void register() { |
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81 clazzes.add(CCSID37.class); |
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82 clazzes.add(CCSID273.class); |
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83 clazzes.add(CCSID277.class); |
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84 clazzes.add(CCSID278.class); |
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85 clazzes.add(CCSID280.class); |
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86 clazzes.add(CCSID284.class); |
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87 clazzes.add(CCSID285.class); |
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88 clazzes.add(CCSID297.class); |
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89 clazzes.add(CCSID424.class); |
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90 clazzes.add(CCSID500.class); |
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91 clazzes.add(CCSID870.class); |
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92 clazzes.add(CCSID871.class); |
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93 clazzes.add(CCSID875.class); |
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94 clazzes.add(CCSID1025.class); |
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95 clazzes.add(CCSID1026.class); |
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96 clazzes.add(CCSID1112.class); |
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97 clazzes.add(CCSID1140.class); |
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98 clazzes.add(CCSID1141.class); |
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99 clazzes.add(CCSID1147.class); |
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100 clazzes.add(CCSID1148.class); |
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101 } |
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102 |
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103 /** |
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104 * @return unsorted list of available code pages |
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105 */ |
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106 public String[] getAvailableCodePages() { |
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107 HashSet<String> cpset = new HashSet<String>(); |
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108 |
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109 for (Class<?> clazz : clazzes) { |
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110 final ICodepageConverter converter = getConverterFromClassName(clazz); |
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111 |
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112 if (converter != null) { |
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113 cpset.add(converter.getName()); |
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114 } |
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115 } |
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116 |
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117 return cpset.toArray(new String[cpset.size()]); |
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118 } |
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119 |
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120 /** |
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121 * @param encoding |
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122 * @return an {@link ICodePage} object OR null, of not found |
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123 */ |
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124 public ICodePage getCodePage(String encoding) { |
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125 for (Class<?> clazz : clazzes) { |
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126 final ICodepageConverter converter = getConverterFromClassName(clazz); |
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127 |
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128 if (converter != null && converter.getName().equals(encoding)) { |
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129 return converter; |
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130 } |
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131 } |
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132 |
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133 return null; |
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134 } |
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135 |
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136 /** |
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137 * Lazy loading converters takes time, |
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138 * but doesn't happen so often and saves memory. |
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139 * |
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140 * @param clazz {@link ICodepageConverter} |
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141 * @return |
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142 */ |
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143 private ICodepageConverter getConverterFromClassName(Class<?> clazz) { |
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144 try { |
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145 final Constructor<?> constructor = clazz.getConstructor(new Class[0]); |
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146 final ICodepageConverter converter = (ICodepageConverter) constructor.newInstance(); |
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147 converter.init(); |
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148 return converter; |
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149 } |
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150 catch (Exception e) { |
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151 Log.e(TAG, "Couldn't load code page converter class:" + clazz.getCanonicalName(), e); |
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152 return null; |
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153 } |
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154 } |
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155 |
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156 } |