public virtual T Retrieve()
{
// If there are no available items and the pool can expand, expand it
if (Expandable && Available.Count == 0)
{
ExpandPool();
}
if (Available.Count <= 0)
{
throw new NoFreeItemsException();
}
var item = Available.Pop();
InUse.Add(item); // Record this as an item inuse
// Notify the object it has become active
try {
if (item is IPoolNotifiable notifiable)
{
notifiable.PoolInUse(true);
}
} catch (Exception ex) {
if (item is Object unityItem)
{
Debug.LogError(ex, unityItem);
}
else
{
Debug.LogError(ex);
}
}
OnRetrieve?.Invoke(this, item);
// Notify the object it has been returned to the pool
try {
if (item is IPoolNotifiablePost notifiable)
{
notifiable.PoolInUsePost(true);
}
} catch (Exception ex) {
if (item is Object unityItem)
{
Debug.LogError(ex, unityItem);
}
else
{
Debug.LogError(ex);
}
}
return(item);
}
/// <summary>
/// Retrieves an unused object from the pool
/// </summary>
/// <returns>An available object from the pool</returns>
public T Retrieve()
{
// If there are no available items and the pool can expand, expand it
if (Expandable && Available.Count == 0)
{
ExpandPool();
}
if (Available.Count <= 0)
{
throw new NoFreeItemsException();
}
T found = Available.Pop();
InUse.Add(found); // Record this as an item inuse
found.InUse = true;
found.PoolRetrieved();
OnRetrieve?.Invoke(found);
return(found);
}