private void AddItem(RefCountItemContainer <T> container)
{
RefCountItemContainer <T> other;
if (_containers.TryGetValue(container.Item, out other))
{
var wasIncluded = ShouldIncludeContainer(other);
other.Increment(container);
var isIncluded = ShouldIncludeContainer(other);
if (wasIncluded && !isIncluded)
{
_items.Remove(other.Item);
}
else if (!wasIncluded && isIncluded)
{
_items.Add(other.Item);
}
}
else
{
_containers[container.Item] = container;
if (ShouldIncludeContainer(container))
{
_items.Add(container.Item);
}
}
}
private bool RemoveItem(RefCountItemContainer <T> container)
{
RefCountItemContainer <T> other;
if (!_containers.TryGetValue(container.Item, out other))
{
return(false);
}
var wasIncluded = ShouldIncludeContainer(other);
other.Decrement(container);
var isIncluded = ShouldIncludeContainer(other);
if (other.CountOnFirst == 0 && other.CountOnSecond == 0)
{
_containers.Remove(other.Item);
}
if (wasIncluded && !isIncluded)
{
_items.Remove(other.Item);
}
else if (!wasIncluded && isIncluded)
{
_items.Add(other.Item);
}
return(true);
}
/// <summary> /// When implemented in a derived class, determines if the specified container's item should be included in the result. /// </summary> /// <param name="container">The container.</param> /// <returns><c>true</c> if <paramref name="container"/> belongs in the collection; otherwise, false.</returns> protected abstract bool ShouldIncludeContainer(RefCountItemContainer <T> container);
/// <summary>
/// Determines if the specified container's item should be included in the result.
/// </summary>
/// <param name="container">The container.</param>
/// <returns>
/// <c>true</c> if <paramref name="container" /> belongs in the collection; otherwise, false.
/// </returns>
protected override bool ShouldIncludeContainer(RefCountItemContainer <T> container)
{
return(container.CountOnFirst > 0 && container.CountOnSecond == 0);
}
private static void AddItem(IDictionary <T, RefCountItemContainer <T> > containers, RefCountItemContainer <T> container)
{
RefCountItemContainer <T> other;
if (containers.TryGetValue(container.Item, out other))
{
other.Increment(container);
}
else
{
containers[container.Item] = container;
}
}
private static bool RemoveItem(IDictionary <T, RefCountItemContainer <T> > containers, RefCountItemContainer <T> container)
{
RefCountItemContainer <T> other;
if (!containers.TryGetValue(container.Item, out other))
{
return(false);
}
other.Decrement(container);
if (other.CountOnFirst == 0 && other.CountOnSecond == 0)
{
containers.Remove(other.Item);
}
return(true);
}
