internationalization-resourcebundle.java

RMS移动商务应用开发

/* License
 * 
 * Copyright 1994-2004 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  
 *  * Redistribution of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 * 
 *  * Redistribution in binary form must reproduce the above copyright notice,
 *      this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *  
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *  
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility. 
 */

import java.util.Hashtable;

public class ResourceBundle {

  private static Hashtable groups = new Hashtable();

  public static Object getObject( String group, String
                                               key ) {
    ResourceBundle bundle;

    synchronized( groups ){
      bundle = (ResourceBundle) groups.get( group );
      if( bundle == null ){
        bundle = loadBundle( group );
      }
    }

    return bundle.getResource( key );
  }

  public static String getString( String group, String
                                               key ) {
        return (String) getObject( group, key );
  }

  public static ResourceBundle loadBundle( String
                                            name ) {
    ResourceBundle bundle = null;
    Locale         locale = Locale.getDefaultLocale();
    String         language = locale.getLanguage();
    String         country = locale.getCountry();

    try {
        bundle = (ResourceBundle)
                   Class.forName( name ).newInstance();
    }
    catch( Exception e ){
    }

    if( language != null ){
      ResourceBundle child;

      try {
        child = (ResourceBundle) Class.forName(
                              name + '_' + language
                                    ).newInstance();
        child.setParent( bundle );
        bundle = child;
      }
      catch( Exception e ){
      }

      if( country != null ){
        try {
          child = (ResourceBundle) Class.forName(
                           name + '_' + language +
                           '_' + country
                           ).newInstance();
          child.setParent( bundle );
          bundle = child;
        }
         catch( Exception e ){
         }
       }
     }

     if( bundle == null ){
       bundle = new ResourceBundle();
     }

     groups.put( name, bundle );
     return bundle;
  }

  protected Hashtable resources = new Hashtable();
  private   ResourceBundle parent;

  protected ResourceBundle() {
  }

  protected void setParent( ResourceBundle parent ) {
    this.parent = parent;
  }

  protected Object getResource( String key ) {
    Object obj = null;


    if( resources != null ){
      obj = resources.get( key );
    }

    if( obj == null && parent != null ){
      obj = parent.getResource( key );
    }

    return obj;
  }

  public static class Locale {
    private String language = "en";
    private String country = "US";

    public Locale( String language, String country ) {
      this.language = language;
      this.country = country;
    }

    public Locale( String locale ) {
      if( locale != null ){
        int pos = locale.indexOf( '-' );
        if( pos != -1 ){
          language = locale.substring( 0, pos );
          locale = locale.substring( pos+1 );

          pos = locale.indexOf( '-' );
          if( pos == -1 ){
            country = locale;
          } else {
            country = locale.substring( 0, pos );
          }
        }
      }
    }

    public String getLanguage() {
      return language;
    }

    public String getCountry() {
      return country;
    }

    private static Locale defaultLocale = new
                  Locale( System.getProperty(
                   "microedition.locale" ) );

    public static Locale getDefaultLocale() {
      return defaultLocale;
    }

    public static void setDefaultLocale( Locale
                                     locale ) {
      defaultLocale = locale;
    }
  }
}