public Node AddChildReference(Guid key)
{
if (ChildrenReference == null)
{
ChildrenReference = new HashSet <Guid>();
}
ChildrenReference.Add(key);
return(this);
}
/// <summary>
/// Removes the specified node from <see cref="Children" />.
/// </summary>
/// <param name="childNode">
/// The child node to remove.
/// </param>
/// <returns>
/// <see langword="true" /> if the specified node was present in <see cref="Children" />, otherwise <see langword="false" />.
/// </returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="childNode" /> is <see langword="null" />.
/// </exception>
public Boolean RemoveChild(TreeNode <T> childNode)
{
childNode.RejectIf().IsNull(nameof(childNode));
lock (SyncRoot)
{
childNode.ParentReference = null;
return(ChildrenReference.Remove(childNode));
}
}
/// <summary>
/// Adds the specified node to <see cref="Children" /> and sets its <see cref="Parent" /> to the current node.
/// </summary>
/// <param name="childNode">
/// The child node to add.
/// </param>
/// <param name="enforceDuplicateProhibition">
/// A value indicating whether or not to reject <paramref name="childNode" /> if the current node already contains a
/// reference to it.
/// </param>
/// <returns>
/// <see langword="true" /> if the specified node was added to <see cref="Children" />, otherwise <see langword="false" />.
/// </returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="childNode" /> is <see langword="null" />.
/// </exception>
protected Boolean AddChild(TreeNode <T> childNode, Boolean enforceDuplicateProhibition)
{
lock (SyncRoot)
{
if (Capacity > UnlimitedCapacityValue && ChildrenReference.Count() >= Capacity)
{
return(false);
}
else if (enforceDuplicateProhibition && ChildrenReference.Contains(childNode.RejectIf().IsNull(nameof(childNode))))
{
return(false);
}
childNode.ParentReference = this;
ChildrenReference.Add(childNode);
}
return(true);
}