How to use

beforeRender

method

in

org.apache.wicket.behavior.IBehavior

@Override
public void beforeRender(Component aComponent) {
  for (IBehavior behavior : behaviors) {
    behavior.beforeRender(aComponent);
  }
}

/**
 * {@link IBehavior#beforeRender(Component)} Notify all behaviors that are assigned to this
 * component that the component is about to be rendered.
 */
private void notifyBehaviorsComponentBeforeRender()
{
  List behaviors = getBehaviorsImpl();
  if (behaviors != null)
  {
    for (Iterator i = behaviors.iterator(); i.hasNext();)
    {
      IBehavior behavior = (IBehavior)i.next();
      if (isBehaviorAccepted(behavior))
      {
        behavior.beforeRender(this);
      }
    }
  }
}

/**
 * {@link IBehavior#beforeRender(Component)} Notify all behaviors that are assigned to this
 * component that the component is about to be rendered.
 */
private void notifyBehaviorsComponentBeforeRender()
{
  for (IBehavior behavior : getBehaviors())
  {
    if (isBehaviorAccepted(behavior))
    {
      behavior.beforeRender(this);
    }
  }
}