namespace HeuristicLab.Problems.RoutePlanning.Graph {
  public class Edge<Vertex> : IEdge<Vertex> {
    private readonly Vertex source;
    public Vertex Source {
      get { return this.source; }
    }

    private readonly Vertex target;
    public Vertex Target {
      get { return this.target; }
    }

    private short category;
    public short Category {
      get { return category; }
      set { category = value; }
    }

    public Edge(Vertex source, Vertex target)
      : this(source, target, 0) {

    }

    public Edge(Vertex source, Vertex target, short category) {
      this.source = source;
      this.target = target;
      this.category = category;
    }

    public override string ToString() {
      return string.Format("{0}->{1}", this.Source, this.Target);
    }
  }
}