/// <summary>Add a listener to the list.</summary>
/// <remarks>Add a listener to the list.</remarks>
/// <?></?>
/// <param name="type">type of listener being registered.</param>
/// <param name="listener">the listener instance.</param>
/// <returns>a handle to later remove the registration, if desired.</returns>
public virtual ListenerHandle AddListener <T>(T listener) where T : RepositoryListener
{
System.Type type = typeof(T);
ListenerHandle handle = new ListenerHandle(this, type, listener);
Add(handle);
return(handle);
}
internal virtual void Remove(ListenerHandle handle)
{
IList <ListenerHandle> list = lists.Get(handle.type);
if (list != null)
{
list.Remove(handle);
}
}
private void Add(ListenerHandle handle)
{
IList <ListenerHandle> list = lists.Get(handle.type);
if (list == null)
{
CopyOnWriteArrayList <ListenerHandle> newList;
newList = new CopyOnWriteArrayList <ListenerHandle>();
list = lists.PutIfAbsent(handle.type, newList);
if (list == null)
{
list = newList;
}
}
list.AddItem(handle);
}
