/// <summary>
/// Locate a listener is in the list of listeners.
/// </summary>
/// <param name="listenerArray">
/// The array of listeners to sarch
/// </param>
/// <param name="listener">
/// The <see cref="ICacheListener"/> to search for.
/// </param>
/// <returns>
/// The index of the listener in the list of listeners.
/// </returns>
private int IndexOf(ICacheListener[] listenerArray, ICacheListener listener)
{
for (int i = 0, c = listenerArray.Length; i < c; ++i)
{
if (listener.Equals(listenerArray[i]))
{
return(i);
}
}
return(-1);
}
/// <summary>
/// Remove a listener.
/// </summary>
/// <param name="listener">
/// The <see cref="ICacheListener"/> to remove.
/// </param>
public virtual void Remove(ICacheListener listener)
{
lock (this)
{
// Swing (Kestrel) will add/remove null listeners
if (listener == null)
{
return;
}
ICacheListener[] oldArray = GetListenerListFor(listener);
int count = oldArray.Length;
// most common case - exactly one listener
if (count == 1)
{
if (listener.Equals(oldArray[0]))
{
SetListenerListFor(listener, BLANKLIST);
}
return;
}
if (count > 0)
{
// locate the listener in the list
int index = IndexOf(oldArray, listener);
if (index >= 0)
{
// remove the listener from the list
ICacheListener[] newArray = new ICacheListener[count - 1];
if (index > 0)
{
Array.Copy(oldArray, newArray, index);
}
if (index + 1 < count)
{
Array.Copy(oldArray, index + 1, newArray, index, count - index - 1);
}
SetListenerListFor(listener, newArray);
}
}
}
}