namespace Netron.Diagramming.Core.Analysis {
  /// <summary>
  /// Describes a connection from the point of view of graph analysis.
  /// </summary>
  public interface IEdge {
    /// <summary>
    /// Indicates if this edge is directed or undirected.
    /// </summary>
    bool IsDirected { get; set; }
    /// <summary>
    /// Returns the first, or source, node upon which this Edge is incident.
    /// </summary>
    INode SourceNode { get; }
    /// <summary>
    /// Returns the second, or target, node upon which this Edge is incident.
    /// </summary>
    INode TargetNode { get; }
    /// <summary>
    /// Given a Node upon which this Edge is incident, the opposite incident
    /// Node is returned. Throws an exception if the input node is not incident
    /// on this Edge.
    /// </summary>
    INode AdjacentNode(INode node);
  }
}