namespace HeuristicLab.Problems.RoutePlanning.Graph {
  public class Vertex<T> {
    private static long idCounter = 0;

    private long id;
    public long Id {
      get { return id; }
    }

    private T node;
    public T Node {
      get { return node; }
    }

    public Vertex(T node) {
      this.node = node;
      this.id = idCounter++;
    }

    public static bool operator ==(Vertex<T> v1, Vertex<T> v2) {
      if ((object)v1 == null) {
        if ((object)v2 == null) {
          return true;
        }
        return false;
      }
      if ((object)v1 == null && (object)v2 != null) {
        return false;
      }
      return v1.Equals(v2);
    }

    public static bool operator !=(Vertex<T> v1, Vertex<T> v2) {
      return !(v1 == v2);
    }

    public override bool Equals(object obj) {
      if (obj is Vertex<T>) {
        Vertex<T> graph = (obj as Vertex<T>);
        return this.Equals(graph);
      }
      return false;
    }

    public override int GetHashCode() {
      return typeof(T).GetHashCode() ^ this.Node.GetHashCode();
    }

    public override string ToString() {
      return string.Format("{0}", this.Node);
    }


  }
}