/* AWTEventListenerProxy.java -- wrapper/filter for AWTEventListener
   Copyright (C) 2002, 2005  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
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any later version.

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

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along with GNU Classpath; see the file COPYING.  If not, write to the
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02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
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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
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terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
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package java.awt.event;

import java.awt.AWTEvent;
import java.awt.Toolkit;
import java.util.EventListenerProxy;

/**
 * This class allows adding an AWTEventListener which only pays attention to
 * a specific event mask.
 *
 * @author Eric Blake (ebb9@email.byu.edu)
 * @see Toolkit
 * @see EventListenerProxy
 * @since 1.4
 * @status updated to 1.4
 */
public class AWTEventListenerProxy extends EventListenerProxy
  implements AWTEventListener
{
  /** The event mask. */
  private final long mask;

  /**
   * Construct an AWT Event Listener which only listens to events in the given
   * mask, passing the work on to the real listener.
   *
   * @param eventMask the mask of events to listen to
   * @param listener the wrapped listener
   */
  public AWTEventListenerProxy(long eventMask, AWTEventListener listener)
  {
    super(listener);
    mask = eventMask;
  }

  /**
   * Forwards events on to the delegate.
   *
   * @param event the to forward to the delagate listener
   *
   * @throws NullPointerException if the delegate this was created with is null
   */
  public void eventDispatched(AWTEvent event)
  {
    ((AWTEventListener) getListener()).eventDispatched(event);
  }

  /**
   * This returns the event mask associated with this listener.
   *
   * @return the event mask
   */
  public long getEventMask()
  {
    return mask;
  }
} // class AWTEventListenerProxy