1 | /*
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2 | * Dictionary.java
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3 | * Copyright (C) 2005 New Zealand Digital Library, http://www.nzdl.org
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4 | *
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5 | * This program is free software; you can redistribute it and/or modify
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6 | * it under the terms of the GNU General Public License as published by
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7 | * the Free Software Foundation; either version 2 of the License, or
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8 | * (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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18 | */
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19 | package org.greenstone.gsdl3.util;
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20 |
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21 | import java.util.ResourceBundle;
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22 | import java.util.Locale;
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23 | import java.util.Enumeration;
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24 |
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25 | import org.apache.log4j.*;
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26 |
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27 | public class Dictionary
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28 | {
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29 |
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30 | static Logger logger = Logger.getLogger(org.greenstone.gsdl3.util.Dictionary.class.getName());
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31 |
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32 | /** The locale of this dictionary. */
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33 | protected Locale locale = null;
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34 |
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35 | /** The resource that has been loaded */
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36 | protected String resource = null;
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37 |
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38 | /**
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39 | * The ResourceBundle which contains the raw key-value mappings. Loaded from
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40 | * a file named "resource_locale.properties
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41 | */
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42 | private ResourceBundle raw = null;
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43 |
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44 | /**
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45 | * Constructs the Dictionary class by first creating a locale from the
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46 | * specified language, (or using the default locale if this didn't work),
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47 | * then loading a resource bundle based on this locale.
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48 | */
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49 | public Dictionary(String resource, String lang)
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50 | {
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51 | // Initialize.
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52 |
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53 | this.locale = new Locale(lang);
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54 | this.resource = resource;
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55 | if (this.locale == null)
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56 | {
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57 | this.locale = Locale.getDefault();
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58 | }
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59 | try
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60 | {
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61 | this.raw = ResourceBundle.getBundle(this.resource, this.locale);
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62 | }
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63 | catch (Exception e)
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64 | {
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65 | //logger.debug("Dictionary: couldn't locate a resource bundle for "+resource);
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66 | }
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67 | }
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68 |
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69 | public Dictionary(String resource, Locale locale)
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70 | {
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71 | this.locale = locale;
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72 | this.resource = resource;
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73 | try
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74 | {
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75 | this.raw = ResourceBundle.getBundle(this.resource, this.locale);
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76 | }
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77 | catch (Exception e)
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78 | {
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79 | //logger.debug("Dictionary: couldn't locate a resource bundle for "+resource);
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80 | }
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81 | }
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82 |
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83 | /**
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84 | * Constructs the Dictionary class by first creating a locale from the
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85 | * specified language, (or using the default locale if this didn't work),
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86 | * then loading a resource bundle based on this locale. A classloader is
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87 | * specified which can be used to find the resource.
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88 | */
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89 | public Dictionary(String resource, String lang, ClassLoader loader)
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90 | {
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91 | // Initialize.
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92 | this.locale = new Locale(lang);
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93 | this.resource = resource;
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94 | if (this.locale == null)
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95 | {
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96 | this.locale = Locale.getDefault();
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97 | }
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98 | // try the specified class loader
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99 | try
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100 | {
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101 | this.raw = ResourceBundle.getBundle(this.resource, this.locale, loader);
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102 | return;
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103 | }
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104 | catch (Exception e)
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105 | {
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106 | }
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107 | ;
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108 |
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109 | try
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110 | {
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111 | this.raw = ResourceBundle.getBundle(this.resource, this.locale);
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112 | }
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113 | catch (Exception ex)
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114 | {
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115 | //logger.debug("Dictionary: couldn't locate a resource bundle for "+resource);
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116 | }
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117 | }
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118 |
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119 | public Enumeration getKeys()
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120 | {
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121 | if (this.raw != null)
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122 | {
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123 | return this.raw.getKeys();
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124 | }
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125 | return null;
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126 | }
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127 |
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128 | /**
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129 | * Overloaded to call get with both a key and an empty argument array.
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130 | *
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131 | * @param key
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132 | * A <strong>String</strong> which is mapped to a initial String
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133 | * within the ResourceBundle.
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134 | * @return A <strong>String</strong> which has been referenced by the key
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135 | * String and that contains no argument fields.
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136 | */
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137 | public String get(String key)
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138 | {
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139 | return get(key, null);
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140 | }
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141 |
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142 | /**
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143 | * Used to retrieve a property value from the Locale specific
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144 | * ResourceBundle, based upon the key and arguments supplied. If the key
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145 | * cannot be found or if some other part of the call fails a default
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146 | * (English) error message is returned. <BR>
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147 | * Here the get recieves a second argument which is an array of Strings used
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148 | * to populate argument fields, denoted {<I>n</I>}, within the value String
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149 | * returned.
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150 | *
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151 | * @param key
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152 | * A <strong>String</strong> which is mapped to a initial String
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153 | * within the ResourceBundle.
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154 | * @param args
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155 | * A <strong>String[]</strong> used to populate argument fields
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156 | * within the complete String.
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157 | * @return A <strong>String</strong> which has been referenced by the key
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158 | * String and that either contains no argument fields, or has had
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159 | * the argument fields populated with argument Strings provided in
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160 | * the get call.
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161 | */
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162 | public String get(String key, String args[])
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163 | {
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164 | String argsStr = "";
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165 | if (args != null)
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166 | {
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167 | for (String arg : args)
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168 | {
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169 | argsStr += arg + " ";
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170 | }
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171 | }
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172 |
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173 | if (this.raw == null)
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174 | {
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175 | return null;
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176 | }
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177 | try
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178 | {
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179 | String initial_raw = this.raw.getString(key);
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180 | // convert to unicode, copied from gatherer dictionary
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181 | String initial = new String(initial_raw.getBytes("ISO-8859-1"), "UTF-8");
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182 |
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183 | // if we haven't been given any args, don't bother looking for them
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184 | if (args == null)
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185 | {
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186 | return initial;
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187 | }
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188 | // If the string contains arguments we have to insert them.
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189 | StringBuffer complete = new StringBuffer();
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190 | // While we still have initial string left.
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191 | while (initial.length() > 0 && initial.indexOf('{') != -1 && initial.indexOf('}') != -1)
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192 | {
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193 | // Remove preamble
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194 | int opening = initial.indexOf('{');
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195 | int closing = initial.indexOf('}');
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196 | int comment_mark = initial.indexOf('-', opening); // May not exist
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197 | if (comment_mark > closing)
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198 | { // May also be detecting a later comment
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199 | comment_mark = -1;
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200 | }
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201 | complete.append(initial.substring(0, opening));
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202 |
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203 | // Parse arg_num
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204 | String arg_str = null;
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205 | if (comment_mark != -1)
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206 | {
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207 | arg_str = initial.substring(opening + 1, comment_mark);
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208 | }
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209 | else
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210 | {
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211 | arg_str = initial.substring(opening + 1, closing);
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212 | }
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213 | if (closing + 1 < initial.length())
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214 | {
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215 | initial = initial.substring(closing + 1);
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216 | }
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217 | else
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218 | {
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219 | initial = "";
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220 | }
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221 | int arg_num = Integer.parseInt(arg_str);
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222 | // Insert argument
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223 | if (args != null && 0 <= arg_num && arg_num < args.length)
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224 | {
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225 | complete.append(args[arg_num]);
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226 | }
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227 | }
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228 | complete.append(initial);
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229 | return complete.toString();
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230 | }
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231 | catch (Exception e)
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232 | {
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233 | //logger.debug("Dictionary Error: couldn't find string for key:" + key +" in resource "+this.resource);
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234 | return null;
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235 | }
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236 | }
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237 | }
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