AvailableLocales


1   /*
2    * Copyright 2004 Outerthought bvba and Schaubroeck nv
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.outerj.daisy.frontend;
17  
18  import org.apache.excalibur.source.SourceResolver;
19  import org.apache.excalibur.source.Source;
20  import org.apache.avalon.framework.logger.Logger;
21  import org.apache.avalon.framework.service.ServiceManager;
22  import org.outerj.daisy.repository.LocaleHelper;
23  
24  import java.util.List  ;
25  import java.util.ArrayList  ;
26  import java.util.Locale  ;
27  import java.io.InputStream  ;
28  import java.io.BufferedReader  ;
29  import java.io.InputStreamReader  ;
30  
31  /**
32   * Helper class that reads available locales from a file.
33   */
34  public class AvailableLocales {
35      private ServiceManager serviceManager;
36      private Logger logger;
37  
38      public AvailableLocales(ServiceManager serviceManager, Logger logger) {
39          this.serviceManager = serviceManager;
40          this.logger = logger;
41      }
42  
43      public List   getLocales() throws Exception   {
44          SourceResolver sourceResolver = null;
45          Source source = null;
46          InputStream   is = null;
47          try {
48              sourceResolver = (SourceResolver)serviceManager.lookup(SourceResolver.ROLE);
49              source = sourceResolver.resolveURI("resources/conf/locales.txt");
50              is = source.getInputStream();
51              return readLocales(is);
52          } finally {
53              if (is != null) {
54                  try {
55                      is.close();
56                  } catch (Throwable   e) {
57                      logger.error("Error closing locales.txt input stream.", e);
58                  }
59              }
60              if (source != null)
61                  sourceResolver.release(source);
62              if (sourceResolver != null)
63                  serviceManager.release(sourceResolver);
64          }
65      }
66  
67      private List   readLocales(InputStream   inputStream) throws Exception   {
68          List   locales = new ArrayList  ();
69          BufferedReader   reader = new BufferedReader  (new InputStreamReader  (inputStream));
70          String   line = reader.readLine();
71          while (line != null) {
72              if (line.length() > 0) {
73                  if (line.charAt(0) != '#') {
74                      line = line.trim();
75                      Locale   locale = LocaleHelper.parseLocale(line);
76                      locales.add(locale);
77                  }
78              }
79              line = reader.readLine();
80          }
81          return locales;
82      }
83  }
84
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