CharsetOwnerInterface


1   // The contents of this file are subject to the Mozilla Public License Version
2   // 1.1
3   //(the "License"); you may not use this file except in compliance with the
4   //License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
5   //
6   //Software distributed under the License is distributed on an "AS IS" basis,
7   //WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
8   //for the specific language governing rights and
9   //limitations under the License.
10  //
11  //The Original Code is "The Columba Project"
12  //
13  //The Initial Developers of the Original Code are Frederik Dietz and Timo
14  // Stich.
15  //Portions created by Frederik Dietz and Timo Stich are Copyright (C) 2003.
16  //
17  //All Rights Reserved.undation, Inc., 59 Temple Place - Suite 330, Boston, MA
18  // 02111-1307, USA.
19  package org.columba.core.charset;
20  
21  import java.nio.charset.Charset  ;
22  
23  
24  /**
25   * Should be implemented by objects encapsulating a charset. Enables
26   * interested objects to register listeners.
27   */
28  public interface CharsetOwnerInterface {
29      /**
30   * Returns the currently chosen charset. This method may return null
31   * if Columba should try to autodetect the charset.
32   */
33      public abstract Charset   getCharset();
34  
35      /**
36   * Sets the currently active charset. This method must notify all
37   * registered CharacterListener instances. If null is passed, the
38   * charset will be determined automatically.
39   */
40      public abstract void setCharset(Charset   charset);
41  
42      /**
43   * Registers a listener to get notified whenever the charset changes.
44   */
45      public abstract void addCharsetListener(CharsetListener l);
46  
47      /**
48   * Unregisters a previously registered CharacterListener instance.
49   */
50      public abstract void removeCharsetListener(CharsetListener l);
51  }
52
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