/// <summary>
/// Find edge with given node
/// </summary>
/// <param name="node">The node to filter edges by</param>
/// <returns>Node with given id or null</returns>
public EdgesCollection FilterByNode(INode node)
{
var nodeId = node.Id;
var firstEdges = _firstIdToEdges[nodeId];
var secondEdges = _secondIdToEdges[nodeId];
var result = new EdgesCollection(firstEdges, secondEdges);
return(result);
}
/// <summary>
/// Find edge by given pair of nodes
/// </summary>
/// <param name="first">edge first node</param>
/// <param name="second">edge second node</param>
/// <returns>edge on given pair of nodes or null</returns>
public IEdge FindEdge(INode first, INode second)
{
EdgesCollection edges = this.FilterByNode(first).FilterByNode(second);
if (edges.Count > 0)
{
return(edges[0]);
}
return(null);
}
/// <summary>
/// Find edge with given node
/// </summary>
/// <param name="node">The node to filter edges by</param>
/// <returns>Node with given id or null</returns>
public EdgesCollection FilterByNode(INode node)
{
EdgesCollection result = new EdgesCollection();
foreach (IEdge edge in this)
{
if (edge.First.Id == node.Id || edge.Second.Id == node.Id)
{
result.Add(edge);
}
}
return(result);
}