public static TNode GetNode <TNodeType, TNode>(this IContainerNode <TNodeType> containerNode, TNodeType nodeType, IEqualityComparer <TNodeType> nodeTypeEqualityComparer)
where TNode : Node <TNodeType>
{
Contract.Requires(containerNode != null);
var node = containerNode.GetNode(nodeType, nodeTypeEqualityComparer);
return(node != null ? (TNode)node : null);
}
public static TNode GetOrAddNode <TNodeType, TNode>(this IContainerNode <TNodeType> containerNode, TNodeType nodeType, Func <TNode> nodeFactoryMethod, IEqualityComparer <TNodeType> nodeTypeEqualityComparer)
where TNode : Node <TNodeType>
{
Contract.Requires(containerNode != null);
Contract.Requires(nodeFactoryMethod != null);
Contract.Requires(nodeTypeEqualityComparer != null);
// Try and get an existing node from the container node.
var existingNode = containerNode.GetNode <TNodeType, TNode>(nodeType, nodeTypeEqualityComparer);
if (existingNode != null)
{
return(existingNode);
}
// Add new node to the container node.
var newNode = nodeFactoryMethod();
containerNode.Add(newNode);
return(newNode);
}
public static Node <TNodeType> GetNode <TNodeType>(this IContainerNode <TNodeType> containerNode, TNodeType nodeType)
{
Contract.Requires(containerNode != null);
return(containerNode.GetNode <TNodeType>(nodeType, Node <TNodeType> .DefaultNodeTypeEqualityComarer));
}