/// <summary>
/// Adds a new subscriber to this Collision Subscription
/// </summary>
/// <param name="newSubscriber"></param>
/// <returns></returns>
public CollisonSubscriberHolder Register(ICollisionSubscriber newSubscriber)
{
CollisonSubscriberHolder newHolder = new CollisonSubscriberHolder(newSubscriber);
this.listOfSubscribers.PushFront(newHolder);
return(newHolder);
}
/// <summary>
/// Remove a subscriber from this subscription
/// </summary>
/// <param name="oldSubscriber"></param>
/// <returns></returns>
public bool Unregister(ICollisionSubscriber oldSubscriber)
{
CollisonSubscriberHolder oldHolder = this.Search(oldSubscriber);
Debug.Assert(oldHolder != null);
oldHolder.Reset();
this.listOfSubscribers.Pop(oldHolder);
oldHolder = null;
return(true);
}
//
// Private Methods
//
/// <summary>
/// Return a CollisonSubscriberHolder given an ICollisionScriber
/// </summary>
/// <param name="queriedSubscriber"></param>
/// <returns></returns>
private CollisonSubscriberHolder Search(ICollisionSubscriber queriedSubscriber)
{
CollisonSubscriberHolder itr = this.listOfSubscribers.Head as CollisonSubscriberHolder;
while (itr != null)
{
if (ReferenceEquals(itr.Subscriber, queriedSubscriber))
{
break; // Found it
}
itr = itr.next as CollisonSubscriberHolder;
}
return(itr);
}
/// <summary>
/// Removes an observer from this collison pair
/// </summary>
/// <param name="oldSubscriber"></param>
/// <returns></returns>
public bool Unsubscribe(ICollisionSubscriber oldSubscriber)
{
return(this.subscription.Unregister(oldSubscriber));
}
/// <summary>
/// Adds a new observer to this collison pair
/// </summary>
/// <param name="newSubscriber"></param>
public void Subscribe(ICollisionSubscriber newSubscriber)
{
this.subscription.Register(newSubscriber);
}
/// <summary>
/// Removes the subscriber from the subscription
/// </summary>
public override void Reset()
{
this.subscriber = null;
}
//
// Constructor
//
public CollisonSubscriberHolder(ICollisionSubscriber newSubscriber)
: base()
{
this.subscriber = newSubscriber;
}
