Interceptor


1   /***
2    * Julia: France Telecom's implementation of the Fractal API
3    * Copyright (C) 2001-2002 France Telecom R&D
4    *
5    * This library is free software; you can redistribute it and/or
6    * modify it under the terms of the GNU Lesser General Public
7    * License as published by the Free Software Foundation; either
8    * version 2 of the License, or (at your option) any later version.
9    *
10   * This library is distributed in the hope that it will be useful,
11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   * Lesser General Public License for more details.
14   *
15   * You should have received a copy of the GNU Lesser General Public
16   * License along with this library; if not, write to the Free Software
17   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18   *
19   * Contact: Eric.Bruneton@rd.francetelecom.com
20   *
21   * Author: Eric Bruneton
22   */
23  
24  package org.objectweb.fractal.julia;
25  
26  /**
27   * An interceptor object, i.e., a {@link Controller} object that intercepts
28   * method calls. An interceptor does some pre and post computations before and
29   * after delegating calls to a "delegate" object.
30   */
31  
32  public interface Interceptor extends Controller {
33  
34    /**
35     * Returns the object to which this interceptor delegates method calls.
36     *
37     * @return the object to which this interceptor delegates method calls.
38     * @see #setFcItfDelegate setFcItfDelegate
39     */
40  
41    Object   getFcItfDelegate ();
42  
43    /**
44     * Sets the object to which this interceptor delegates method calls.
45     *
46     * @param delegate the object to which this interceptor delegates method
47     *      calls.
48     * @see #getFcItfDelegate getFcItfDelegate
49     */
50  
51    void setFcItfDelegate (Object   delegate);
52  
53    /**
54     * Clones this interceptor object. This method declaration is needed because
55     * the clone method is not defined in J2ME (CLDC profile).
56     *
57     * @return a copy of this interceptor object.
58     */
59  
60    Object   clone ();
61  }
62
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