Module org.monte.media
Package org.monte.media.beans

Class WeakPropertyChangeListener

java.lang.Object
org.monte.media.beans.WeakPropertyChangeListener
All Implemented Interfaces:
PropertyChangeListener, EventListener
public class WeakPropertyChangeListener extends Object implements PropertyChangeListener
Property change listener that holds weak reference to a target property change listener. If the weak reference becomes null (meaning the delegate has been GC'ed) then this listener will remove itself from any beans that it receives events from. It isn't perfect, but it's a lot better than nothing... and presumably beans that no longer send out events probably don't care if their listeners weren't properly cleaned up.

Design pattern: Proxy.

Author:
Paul Speed

  • Constructor Details

  • Method Details

    • removeFromSource

      protected void removeFromSource(PropertyChangeEvent event)
      Method that can be subclassed to provide additional remove support. Default implementation only supports StandardBeans.

    • propertyChange

      public void propertyChange(PropertyChangeEvent event)
      Specified by:
      propertyChange in interface PropertyChangeListener

    • getTarget

      public PropertyChangeListener getTarget()
      Returns the target of this proxy. Returns null if the target has been garbage collected.
      Returns:
      The target or null.

    • toString

      public String toString()
      Overrides:
      toString in class Object