/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* A package-private PropertyChangeListener which listens for
* property changes on an Action and updates the properties
* of an ActionEvent source.
* <p>
* Subclasses must override the actionPropertyChanged method,
* which is invoked from the propertyChange method as long as
* the target is still valid.
* </p>
* <p>
* WARNING WARNING WARNING WARNING WARNING WARNING:<br>
* Do NOT create an annonymous inner class that extends this! If you do
* a strong reference will be held to the containing class, which in most
* cases defeats the purpose of this class.
*
* @param T the type of JComponent the underlying Action is attached to
*
* @author Georges Saab
* @see AbstractButton
*/
implements PropertyChangeListener, Serializable {
// WeakReference's aren't serializable.
// The Component's that reference an Action do so through a strong
// reference, so that there is no need to check for serialized.
synchronized(ActionPropertyChangeListener.class) {
}
}
return queue;
}
super();
setTarget(c);
this.action = a;
}
/**
* PropertyChangeListener method. If the target has been gc'ed this
* will remove the <code>PropertyChangeListener</code> from the Action,
* otherwise this will invoke actionPropertyChanged.
*/
getAction().removePropertyChangeListener(this);
} else {
}
}
/**
* Invoked when a property changes on the Action and the target
* still exists.
*/
private void setTarget(T c) {
// Check to see whether any old buttons have
// been enqueued for GC. If so, look up their
// PCL instance and remove it from its Action.
}
}
}
public T getTarget() {
// Will only happen if serialized and real target was null
return null;
}
}
return action;
}
s.defaultWriteObject();
s.writeObject(getTarget());
}
@SuppressWarnings("unchecked")
throws IOException, ClassNotFoundException {
s.defaultReadObject();
T target = (T)s.readObject();
}
}
WeakReference<U> {
}
return owner;
}
}
}