Source for java.awt.ActiveEvent

   1: /* ActiveEvent.java -- a self-dispatching event
   2:    Copyright (C) 2000, 2002 Free Software Foundation
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package java.awt;
  40: 
  41: /**
  42:  * An interface for events which can dispatch themselves in another thread.
  43:  * This has two uses: first, if your code is in a critical section, calling a
  44:  * synchronized method might deadlock. But by using an ActiveEvent to call
  45:  * the second section, it will not obtain the lock until you have left the
  46:  * critical section, avoiding deadlock. The second use is for calling
  47:  * untrusted code. For example, system code should use an ActiveEvent to
  48:  * invoke user code securely.
  49:  *
  50:  * @author Tom Tromey (tromey@cygnus.com)
  51:  * @since 1.2
  52:  * @status updated to 1.4
  53:  */
  54: public interface ActiveEvent
  55: {
  56:   /**
  57:    * Dispatch the event, according to what the event needs done. Invoked
  58:    * automatically if this is placed on the <code>EventDispatchQueue</code>.
  59:    */
  60:   void dispatch();
  61: } // interface ActiveEvent