/// <summary>
/// Transform a <see cref="GraphSet{T}" /> to <see cref="GraphSet{TX}" />.
/// </summary>
/// <typeparam name="T">the type of element</typeparam>
/// <typeparam name="TX">The type of element of the new <see cref="GraphSet{T}" />.</typeparam>
/// <param name="enumerable">The enumerable.</param>
/// <param name="func">The function.</param>
/// <returns>new <see cref="GraphSet{T}" /></returns>
public static GraphSet <TX> ToGraphSet <T, TX>(this IEnumerable <GraphNode <T> > enumerable, Func <T, TX> func)
{
var nodes = enumerable.ToArray();
var dictionary = new Dictionary <GraphNode <T>, GraphNode <TX> >();
var graphSet = new GraphSet <TX>();
foreach (var item in nodes)
{
var node = graphSet.Add(func(item.Value));
dictionary[item] = node;
}
foreach (var item in nodes)
{
var currentNode = dictionary[item];
foreach (var child in item.Children)
{
var childNode = dictionary[child];
currentNode.AddChild(childNode);
}
foreach (var parent in item.Parents)
{
var parentNode = dictionary[parent];
currentNode.AddParent(parentNode);
}
}
return(graphSet);
}
internal GraphNode(GraphSet <T> set, T value)
{
_set = set;
_parents = new HashSet <GraphNode <T> >();
_children = new HashSet <GraphNode <T> >();
Value = value;
set.Add(this);
}