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annotate src/org/tn5250j/encoding/ToolboxCodePageFactory.java @ 131:adf9ca45675b

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author Carl Byington <carl@five-ten-sg.com>
date Thu, 19 Jun 2014 09:57:31 -0700
parents 77ac18bc1b2f
children
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1 /**
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2 * Title: ToolboxCodePage
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3 * Copyright: Copyright (c) 2001, 2002, 2003
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4 * Company:
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5 * @author Kenneth J. Pouncey
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6 * rewritten by LDC, WVL, Luc
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7 * @version 0.4
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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.lang.reflect.Method;
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31
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32 import android.util.Log;
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33
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35 class ToolboxCodePageFactory {
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36 private static final String TAG = "ToolboxCodePageFactory";
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37 private final static String[] CODEPAGES = { "Big5", "Cp037", "Cp273", "Cp277", "Cp278",
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38 "Cp280", "Cp284", "Cp285", "Cp297", "Cp420", "Cp424", "Cp437",
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39 "Cp500", "Cp737", "Cp775", "Cp838", "Cp850", "Cp852", "Cp855",
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40 "Cp856", "Cp857", "Cp858", "Cp860", "Cp861", "Cp862", "Cp863",
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41 "Cp864", "Cp865", "Cp866", "Cp868", "Cp869", "Cp870",
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42 "Cp871", "Cp874", "Cp875", "Cp918", "Cp921", "Cp922",
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43 "Cp923", // IBM Latin-9.
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44 "Cp930", "Cp933", "Cp935", "Cp937", "Cp939", "Cp942", "Cp943",
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45 "Cp948", "Cp949", "Cp950", "Cp964", "Cp970", "Cp1006", "Cp1025",
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46 "Cp1026", "Cp1046", "Cp1097", "Cp1098", "Cp1112", "Cp1122",
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47 "Cp1123", "Cp1124", "Cp1140", "Cp1141", "Cp1142", "Cp1143",
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48 "Cp1144", "Cp1145", "Cp1146", "Cp1147", "Cp1148", "Cp1149",
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49 "Cp1252", "Cp1250", "Cp1251", "Cp1253", "Cp1254", "Cp1255",
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50 "Cp1256", "Cp1257", "Cp1258", "Cp1381", "Cp1383", "Cp33722"
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51 };
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52
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53 private static final String CONVERTER_NAME = "com.ibm.as400.access.CharConverter";
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54 private static final String TOBYTES_NAME = "stringToByteArray";
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55 private static final String TOSTRING_NAME = "byteArrayToString";
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56
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57 private static ToolboxCodePageFactory singleton;
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61 private ToolboxCodePageFactory() {
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62 /* private for singleton */
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63 }
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65 public static synchronized ToolboxCodePageFactory getInstance() {
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66 if (singleton == null) {
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67 singleton = new ToolboxCodePageFactory();
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68 }
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69
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70 return singleton;
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71 }
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72
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73 /**
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74 * @return
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75 */
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76 public String[] getAvailableCodePages() {
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77 try {
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78 final ClassLoader loader = getClassLoader();
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79 Class.forName(CONVERTER_NAME, false, loader);
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80 return CODEPAGES;
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81 }
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82 catch (Exception e) {
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83 Log.i(TAG, "Couldn't locate JT400 Toolbox in classpath. Charset converters can't be used.");
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84 return new String[0];
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85 }
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86 }
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87
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88 /**
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89 * @param encoding
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90 * @return
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91 */
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92 public ICodePage getCodePage(String encoding) {
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93 try {
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94 ClassLoader loader = getClassLoader();
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95 Class<?> conv_class = Class.forName(CONVERTER_NAME, true, loader);
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96 Constructor<?> conv_constructor = conv_class.getConstructor(new Class[] { String.class });
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97 Method toBytes_method = conv_class.getMethod(TOBYTES_NAME, new Class[] { String.class });
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98 Method toString_method = conv_class.getMethod(TOSTRING_NAME, new Class[] { byte[].class });
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99 Object convobj = conv_constructor.newInstance(new Object[] { encoding });
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100 return new ToolboxConverterProxy(convobj, toBytes_method, toString_method);
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101 }
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102 catch (Exception e) {
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103 Log.w(TAG, "Can't load charset converter from JT400 Toolbox for code page " + encoding, e);
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104 return null;
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105 }
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106 }
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107
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108 private static final ClassLoader getClassLoader() {
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109 ClassLoader loader = ToolboxCodePageFactory.class.getClassLoader();
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110
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111 if (loader == null) {
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112 loader = ClassLoader.getSystemClassLoader();
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113 }
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114
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115 return loader;
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116 }
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117
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118 private static class ToolboxConverterProxy implements ICodePage {
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119
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120 private final Object converter;
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121 private final Method tobytesMethod;
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122 private final Method tostringMethod;
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123
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124 private ToolboxConverterProxy(Object converterObject, Method tobytesMethod, Method tostringMethod) {
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125 super();
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126 this.converter = converterObject;
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127 this.tobytesMethod = tobytesMethod;
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128 this.tostringMethod = tostringMethod;
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129 }
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130
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131 public char ebcdic2uni(int index) {
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132 Object result;
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133
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134 try {
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135 result = tostringMethod.invoke(converter, new Object[] { new byte[] { (byte)(index & 0xFF) } });
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136 }
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137 catch (Throwable t) {
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138 result = null;
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139 }
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140
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141 if (result == null)
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142 return 0x00;
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144 return ((String) result).charAt(0);
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145 }
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146
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147 public byte uni2ebcdic(char index) {
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148 Object result;
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149
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150 try {
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151 result = tobytesMethod.invoke(converter, new Object[] { new String(new char[] { index }) });
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152 }
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153 catch (Throwable t) {
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154 result = null;
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155 }
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156
112
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157 if (result == null)
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158 return 0x00;
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159
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160 return ((byte[]) result)[0];
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161 }
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162 }
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163
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164 }