/[schmitzm]/trunk/src/skrueger/i8n/I8NUtil.java
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trunk/src/skrueger/i8n/I8NUtil.java revision 38 by alfonx, Sun Apr 5 15:06:56 2009 UTC branches/1.0-gt2-2.6/src/skrueger/i8n/I8NUtil.java revision 315 by mojays, Wed Aug 26 11:03:27 2009 UTC
# Line 1  Line 1 
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. Krüger - additional utility classes
29     ******************************************************************************/
30  package skrueger.i8n;  package skrueger.i8n;
31    
32    import java.util.Locale;
33  import java.util.Set;  import java.util.Set;
34  import java.util.TreeSet;  import java.util.TreeSet;
35    
36    import org.apache.log4j.Logger;
37    
38  public class I8NUtil {  public class I8NUtil {
39                    static final Logger LOGGER = Logger.getLogger(I8NUtil.class);
40    
41          private static Set<String> languageCodes = new TreeSet<String>();          private static Set<String> languageCodes = new TreeSet<String>();
42          static {          static {
43          for (String code : java.util.Locale.getISOLanguages()) {                  for (Locale locale : java.util.Locale.getAvailableLocales()) {
44                  getLanguageCodes().add(code);                          getLanguageCodes().add(locale.getLanguage());
45          }                  }
46      }                  // for (String code : java.util.Locale.getISOLanguages()) {
47  //                        // getLanguageCodes().add(code);
48  //      /**                  // }
49  //       * @Returns an ImageIcon for a given ISO code or null.          }
50  //       * @param code ISO Country Code  
51  //       */          /**
52  //      public static ImageIcon getFlagIcon(String code) {           * Creates a {@link Translation}<br/>
53  //                         * <p>
54  //              String ressourcename = "resource/flags/" + code.toUpperCase() + ".gif";           * <li>If <code>oneLineCoded</code> is empty or null, NO TRANSLATION is set.
55  //                         * <li>If format can't be recognized, the {@link String} is interpreted as
56  //              URL resourceURL = TranslationEditJPanel.class.getResource(ressourcename);           * the translation in the <code>{@value #DEFAULT_KEY}</code> language
57  //                         *
58  //              if (resourceURL != null)           * @author Stefan Alfons Krüger
59  //                      return new ImageIcon( resourceURL);           */
60  //                        public static Translation createFromOneLIne(final String oneLineCoded) {
61  //              return new ImageIcon();                  Translation result = new Translation();
62  //      }                  result.fromOneLine(oneLineCoded);
63  //                        return result;
64  //      /**          }
65  //       * @Returns an {@link ImageIcon} flag for the language setup as Translation language  
66  //       */          /**
67  //      public static ImageIcon getFlagIcon() {           * Returns the Translation to a String of the Format: "de{Baum}en{tree}" <br/>
68  //              return getFlagIcon( Translation.getActiveLang() );           *
69  //      }           *
70                     * @author Stefan Alfons Krüger
71                     */
72            public static String toOneLine(Translation source) {
73                    StringBuffer oneLine = new StringBuffer();
74                    for (String key : source.keySet()) {
75                            oneLine.append(key + "{" + source.get(key) + "}");
76                    }
77                    return oneLine.toString();
78            }
79    
80          /**          /**
81           * @author Stefan Alfons Krüger           * @author Stefan Alfons Krüger
82           * @param code           * @param code
# Line 45  public class I8NUtil { Line 86  public class I8NUtil {
86                  return getLanguageCodes().contains(code);                  return getLanguageCodes().contains(code);
87          }          }
88    
   
89          /**          /**
90           * @return All language codes available in java.util.Locale.getISOLanguages() without duplicates.           * @return All language codes available in
91             *         java.util.Locale.getISOLanguages() without duplicates.
92           */           */
93          public static Set<String> getLanguageCodes() {          public static Set<String> getLanguageCodes() {
94                  return languageCodes;                  return languageCodes;
95          }          }
 }  
96    
97            /**
98             * @param code
99             *            A two-letter language code.
100             * @return <code>null</code> or one (of many possible) {@link Locale} that
101             *         uses this language.
102             */
103            public static Locale getLocaleFor(String code) {
104                    for (Locale l : Locale.getAvailableLocales()) {
105                            if (l.getLanguage().equals(code.toLowerCase())) {
106                                    return l;
107                            }
108                            // LOGGER.debug(l.getLanguage() + " not = " + code);
109                    }
110    
111                    LOGGER.error("Can't create a Locale for code " + code
112                                    + "! Returning the system default locale to avoid NPEs.");
113    
114                    return Locale.getDefault();
115            }
116    
117            /**
118             * A convenience method that checks if the {@link Translation} object
119             * contains a translation for the active language. A {@link String}
120             * containing only spaces will return <code>false</code>.
121             *
122             * @param trans
123             *            {@link Translation} to check.
124             */
125            public static boolean isEmpty(final Translation trans) {
126                    if (trans == null)
127                            return true;
128                    return isEmpty(trans.toString());
129            }
130    
131            /**
132             * A convenience method that checks if the {@link String} returned by from a
133             * {@link Translation} object contains a "valid" translation for the active
134             * language. A {@link String} containing only spaces or equals
135             * {@link Translation}.NO_TRANSLATION will return <code>false</code>.
136             *
137             * @param transString
138             *            {@link String} to check.
139             */
140            public static boolean isEmpty(final String transString) {
141                    if (transString == null)
142                            return true;
143                    if (transString.trim().isEmpty())
144                            return true;
145                    if (transString.equals(Translation.NO_TRANSLATION))
146                            return true;
147                    return false;
148            }
149    }
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