source: trunk/src/gcc/libjava/java/beans/EventSetDescriptor.java@ 192

/* java.beans.EventSetDescriptor
   Copyright (C) 1998 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
 
GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */


package java.beans;

import java.util.*;
import java.lang.reflect.*;
import gnu.java.lang.*;

/**
 ** EventSetDescriptor describes the hookup between an event source
 ** class and an event listener class.
 **
 ** EventSets have several attributes: the listener class, the events
 ** that can be fired to the listener (methods in the listener class), and
 ** an add and remove listener method from the event firer's class.<P>
 **
 ** The methods have these constraints on them:<P>
 ** <UL>
 ** <LI>event firing methods: must have <CODE>void</CODE> return value.  Any
 ** parameters and exceptions are allowed.  May be public, protected or
 ** package-protected. (Don't ask me why that is, I'm just following the spec.
 ** The only place it is even mentioned is in the Java Beans white paper, and
 ** there it is only implied.)</LI>
 ** <LI>add listener method: must have <CODE>void</CODE> return value.  Must
 ** take exactly one argument, of the listener class's type.  May fire either
 ** zero exceptions, or one exception of type <CODE>java.util.TooManyListenersException</CODE>.
 ** Must be public.</LI>
 ** <LI>remove listener method: must have <CODE>void</CODE> return value.
 ** Must take exactly one argument, of the listener class's type.  May not
 ** fire any exceptions.  Must be public.</LI>
 ** </UL>
 **
 ** A final constraint is that event listener classes must extend from EventListener.<P>
 **
 ** There are also various design patterns associated with some of the methods
 ** of construction. Those are explained in more detail in the appropriate
 ** constructors.<P>
 **
 ** <STRONG>Documentation Convention:</STRONG> for proper
 ** Internalization of Beans inside an RAD tool, sometimes there
 ** are two names for a property or method: a programmatic, or
 ** locale-independent name, which can be used anywhere, and a
 ** localized, display name, for ease of use.  In the
 ** documentation I will specify different String values as
 ** either <EM>programmatic</EM> or <EM>localized</EM> to
 ** make this distinction clear.
 **
 ** @author John Keiser
 ** @since JDK1.1
 ** @version 1.1.0, 31 May 1998
 **/

public class EventSetDescriptor extends FeatureDescriptor {
        private Method addListenerMethod;
        private Method removeListenerMethod;
        private Class listenerType;
        private MethodDescriptor[] listenerMethodDescriptors;
        private Method[] listenerMethods;

        private boolean unicast;
        private boolean inDefaultEventSet = true;

        /** Create a new EventSetDescriptor.
         ** This version of the constructor enforces the rules imposed on the methods
         ** described at the top of this class, as well as searching for:<P>
         ** <OL>
         ** <LI>The event-firing method must be non-private with signature
         ** <CODE>void &lt;listenerMethodName&gt;(&lt;eventSetName&gt;Event)</CODE>
         ** (where <CODE>&lt;eventSetName&gt;</CODE> has its first character capitalized