/[schmitzm]/trunk/src/skrueger/i8n/I8NUtil.java
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revision 38 by alfonx, Sun Apr 5 15:06:56 2009 UTC revision 1100 by alfonx, Mon Oct 11 00:07:14 2010 UTC
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1    /*******************************************************************************
2     * Copyright (c) 2009 Martin O. J. Schmitz.
3     *
4     * This file is part of the SCHMITZM library - a collection of utility
5     * classes based on Java 1.6, focusing (not only) on Java Swing
6     * and the Geotools library.
7     *
8     * The SCHMITZM project is hosted at:
9     * http://wald.intevation.org/projects/schmitzm/
10     *
11     * This program is free software; you can redistribute it and/or
12     * modify it under the terms of the GNU Lesser General Public License
13     * as published by the Free Software Foundation; either version 3
14     * of the License, or (at your option) any later version.
15     *
16     * This program is distributed in the hope that it will be useful,
17     * but WITHOUT ANY WARRANTY; without even the implied warranty of
18     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19     * GNU General Public License for more details.
20     *
21     * You should have received a copy of the GNU Lesser General Public License (license.txt)
22     * along with this program; if not, write to the Free Software
23     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
24     * or try this link: http://www.gnu.org/licenses/lgpl.html
25     *
26     * Contributors:
27     *     Martin O. J. Schmitz - initial API and implementation
28     *     Stefan A. Tzeggai - additional utility classes
29     ******************************************************************************/
30  package skrueger.i8n;  package skrueger.i8n;
31    
32    import java.util.ArrayList;
33    import java.util.List;
34    import java.util.Locale;
35  import java.util.Set;  import java.util.Set;
36  import java.util.TreeSet;  import java.util.TreeSet;
37    
38    import org.apache.log4j.Logger;
39    import org.geotools.resources.i18n.Locales;
40    
41  public class I8NUtil {  public class I8NUtil {
42                    static final Logger LOGGER = Logger.getLogger(I8NUtil.class);
43    
44          private static Set<String> languageCodes = new TreeSet<String>();          private static Set<String> languageCodes = new TreeSet<String>();
45          static {          static {
46          for (String code : java.util.Locale.getISOLanguages()) {                  for (final Locale locale : java.util.Locale.getAvailableLocales()) {
47                  getLanguageCodes().add(code);                          getLanguageCodes().add(locale.getLanguage());
48          }                  }
49      }                  // for (String code : java.util.Locale.getISOLanguages()) {
50  //                        // getLanguageCodes().add(code);
51  //      /**                  // }
52  //       * @Returns an ImageIcon for a given ISO code or null.          }
53  //       * @param code ISO Country Code  
 //       */  
 //      public static ImageIcon getFlagIcon(String code) {  
 //                
 //              String ressourcename = "resource/flags/" + code.toUpperCase() + ".gif";  
 //                
 //              URL resourceURL = TranslationEditJPanel.class.getResource(ressourcename);  
 //                
 //              if (resourceURL != null)  
 //                      return new ImageIcon( resourceURL);  
 //                
 //              return new ImageIcon();  
 //      }  
 //        
 //      /**  
 //       * @Returns an {@link ImageIcon} flag for the language setup as Translation language  
 //       */  
 //      public static ImageIcon getFlagIcon() {  
 //              return getFlagIcon( Translation.getActiveLang() );  
 //      }  
           
           
54          /**          /**
55           * @author Stefan Alfons Krüger           * Creates a {@link Translation}<br/>
56             * <p>
57             * <li>If <code>oneLineCoded</code> is empty or null, NO TRANSLATION is set.
58             * <li>If format can't be recognized, the {@link String} is interpreted as
59             * the translation in the <code>{@value #DEFAULT_KEY}</code> language
60             *
61             * @author Stefan Alfons Tzeggai
62             */
63            public static Translation createFromOneLine(final String oneLineCoded) {
64                    final Translation result = new Translation();
65                    result.fromOneLine(oneLineCoded);
66                    return result;
67            }
68    
69            /**
70             * Returns the Translation to a String of the Format: "de{Baum}en{tree}" <br/>
71             *
72             *
73             * @author Stefan Alfons Tzeggai
74             */
75            public static String toOneLine(final Translation source) {
76                    final StringBuffer oneLine = new StringBuffer();
77                    for (final String key : source.keySet()) {
78                            oneLine.append(key + "{" + source.get(key) + "}");
79                    }
80                    return oneLine.toString();
81            }
82    
83            /**
84             * @author Stefan Alfons Tzeggai
85           * @param code           * @param code
86           * @return true if the code paramter is a valid ISO Language code           * @return true if the code paramter is a valid ISO Language code
87           */           */
88          public static boolean isValidISOLangCode(String code) {          public static boolean isValidISOLangCode(final String code) {
89                  return getLanguageCodes().contains(code);                  return getLanguageCodes().contains(code);
90          }          }
91    
   
92          /**          /**
93           * @return All language codes available in java.util.Locale.getISOLanguages() without duplicates.           * @return All language codes available in
94             *         java.util.Locale.getISOLanguages() without duplicates.
95           */           */
96          public static Set<String> getLanguageCodes() {          public static Set<String> getLanguageCodes() {
97                  return languageCodes;                  return languageCodes;
98          }          }
 }  
99    
100            /**
101             * Lookup {@link Locale} where they speak the 2 letter code language.
102             *
103             * @param code
104             *            A two-letter language code.
105             * @return <code>null</code> or one (of many possible) {@link Locale} that
106             *         uses this language.
107             */
108            public static List<Locale> getLocalesForLang(final String code) {
109    
110                    final ArrayList<Locale> locales = new ArrayList<Locale>();
111    
112                    for (final Locale l : Locale.getAvailableLocales()) {
113                            if (l.getLanguage().equals(code.toLowerCase())) {
114                                    locales.add(l);
115                            }
116                    }
117    
118                    return locales;
119            }
120    
121            /**
122             * Lookup first country where they speak the 2 letter code language.
123             *
124             * @param code
125             *            A two-letter language code.
126             * @return <code>null</code> or one (of many possible) {@link Locale} that
127             *         uses this language.
128             */
129            public static Locale getFirstLocaleForLang(final String code) {
130    
131                    List<Locale> locales = getLocalesForLang(code);
132    
133                    if (locales.size() > 0)
134                            return locales.get(0);
135    
136                    LOGGER.error("Can't create a Locale for code " + code
137                                    + "! Returning the system default locale to avoid NPEs.");
138    
139                    return Locale.getDefault();
140            }
141    
142            /**
143             * A convenience method that checks if the {@link Translation} object
144             * contains a translation for the active language. A {@link String}
145             * containing only spaces will return <code>false</code>.
146             *
147             * @param trans
148             *            {@link Translation} to check.
149             */
150            public static boolean isEmpty(final Translation trans) {
151                    if (trans == null)
152                            return true;
153                    return isEmpty(trans.toString());
154            }
155    
156            /**
157             * A convenience method that checks if the {@link String} returned by from a
158             * {@link Translation} object contains a "valid" translation for the active
159             * language. A {@link String} containing only spaces or equals
160             * {@link Translation}.NO_TRANSLATION will return <code>false</code>.
161             *
162             * @param transString
163             *            {@link String} to check.
164             */
165            public static boolean isEmpty(final String transString) {
166                    if (transString == null)
167                            return true;
168                    if (transString.trim().isEmpty())
169                            return true;
170                    if (transString.equals(Translation.NO_TRANSLATION))
171                            return true;
172                    return false;
173            }
174    
175            /**
176             * @return a {@link Double} between 0 and 1 representing the part of the
177             *         given {@link Translation} that has been filled.
178             * @param ac
179             *            {@link AtlasConfig} to determine the languages to expect.
180             * @param trans
181             *            The {@link Translation} to check.
182             */
183            public static double qmTranslation(final List<String> languages,
184                            final Translation trans) {
185    
186                    if (trans == null)
187                            return 0.;
188    
189                    Integer cunt = 0;
190                    for (final String l : languages) {
191                            final String t = trans.get(l);
192                            if (!isEmpty(t))
193                                    cunt++;
194                    }
195                    return cunt.doubleValue() / (double) languages.size();
196            }
197    
198            /**
199             * The German Umlaute have standard ASCII alternatives that are sometimes
200             * use. This method will replace any possible ASCII-Umlaut Representation
201             * into real Umlaute. E.g. "ae" to "ä" and "ue" to "ü". Umlaute are returned
202             * as inline-UTF8.
203             */
204            public static String mitUmlaute(final String withoutUmlaute) {
205                    String replaced = withoutUmlaute;
206    
207                    replaced = replaced.replaceAll("ue", "\u00FC");
208                    replaced = replaced.replaceAll("Ue", "\u00DC");
209    
210                    replaced = replaced.replaceAll("oe", "\u00F6");
211                    replaced = replaced.replaceAll("Oe", "\u00D6");
212    
213                    replaced = replaced.replaceAll("ae", "\u00E4");
214                    replaced = replaced.replaceAll("Ae", "\u00C4");
215                    return replaced;
216            }
217    }
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