How to use

getFirstIndex

method

in

com.ochafik.util.listenable.CollectionEvent

  public void collectionChanged(CollectionEvent<T> e) {
    switch (e.getType()) {
    case ADDED:
      fireIntervalAdded(this, e.getFirstIndex(), e.getLastIndex());
      break;
    case REMOVED:
      fireIntervalRemoved(this, e.getFirstIndex(), e.getLastIndex());
      break;
    case UPDATED:
      fireContentsChanged(this, e.getFirstIndex(), e.getLastIndex());
      break;
    }
  }
});

  public void collectionChanged(CollectionEvent<T> e) {
    if (listeners != null && !listeners.isEmpty()) {
      Collection<T> filteredElements = e.getElements();
      CollectionEvent<T> filteredEvent = new CollectionEvent<T>(FilteredListenableCollection.this, filteredElements, e.getType(), e.getFirstIndex(), e.getLastIndex());
      for (CollectionListener<T> listener : listeners) {
        listener.collectionChanged(filteredEvent);
      }
    }
  }
});

  public void collectionChanged(CollectionEvent<U> e) {
    // Do not propagate the event if we triggered it
    if (currentlyCausingChange)
      return;
    
    // Only propagate if someone is listening (CollectionSupport already tries not to fire anything when there is no listener, but here we are trying to avoid to create the wrapped elements collection)
    if (collectionSupport == null || !collectionSupport.hasListeners())
      return;
    
    // Adapt the collection of changed / added / removed elements in the event
    collectionSupport.fireEvent(
      AdaptedCollection.this, 
      new AdaptedCollection<U, V>(e.getElements(), AdaptedCollection.this.forwardAdapter, AdaptedCollection.this.backwardAdapter), 
      e.getType(), 
      e.getFirstIndex(), 
      e.getLastIndex());
  }
});