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• NavigableSetEvent.java

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net.sf.javagimmicks.collections8.event.NavigableSetEvent Maven / Gradle / Ivy

package net.sf.javagimmicks.collections8.event;

import java.util.NavigableSet;

import net.sf.javagimmicks.event.Event;
import net.sf.javagimmicks.event.Observable;

/**
 * Represents a change in a {@link Observable} {@link NavigableSet} - like
 * {@link ObservableEventSortedSet}.
 */
public interface NavigableSetEvent extends Event>
{
   /**
    * The possible types of {@link NavigableSetEvent}s.
    */
   enum Type
   {
      /**
       * An element was added
       */
      ADDED,

      /**
       * An already contained element was added again
       */
      READDED,

      /**
       * An element was removed
       */
      REMOVED
   }

   /**
    * The type of the event
    * 
    * @return the type of the event
    * @see Type
    */
   Type getType();

   /**
    * Returns the element that was (re-)added or removed
    * 
    * @return the element that was (re-)added or removed
    */
   E getElement();
}