source: branches/HeuristicLab.BottomUpTreeDistance/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/DirectedGraph/Vertex.cs @ 11211

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2014 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
  [StorableClass]
  public class Vertex : Item, IVertex {
    public event EventHandler PreContentChanged;
    protected virtual void OnPreContentChanged(object sender, EventArgs args) {
      var changed = PreContentChanged;
      if (changed != null) {
        changed(sender, args);
      }
    }

    public event EventHandler PostContentChanged;
    protected virtual void OnPostContentChanged(object sender, EventArgs args) {
      var changed = PostContentChanged;
      if (changed != null) {
        changed(sender, args);
      }
    }

    [Storable]
    private string id;

    public string Id {
      get { return id; }
    }

    [Storable]
    public string Label { get; set; }

    [Storable]
    public double Weight { get; set; }

    [Storable]
    protected object content;
    public object Content {
      get { return content; }
      set {
        OnPreContentChanged(this, EventArgs.Empty);
        content = value;
        OnPostContentChanged(this, EventArgs.Empty);
      }
    }

    private List<IArc> inArcs;
    public IEnumerable<IArc> InArcs {
      get { return inArcs ?? Enumerable.Empty<IArc>(); }
      set { inArcs = value.ToList(); }
    }

    private List<IArc> outArcs;
    public IEnumerable<IArc> OutArcs {
      get { return outArcs ?? Enumerable.Empty<IArc>(); }
      set { outArcs = value.ToList(); }
    }

    [StorableConstructor]
    public Vertex(bool deserializing) : base(deserializing) { }

    public Vertex() {
      id = Guid.NewGuid().ToString();
    }

    public Vertex(object content)
      : this() {
      this.content = content;
    }

    protected Vertex(Vertex original, Cloner cloner)
      : base(original, cloner) {
      id = Guid.NewGuid().ToString();
      content = original.content;
      Label = original.Label;
      Weight = original.Weight;
      inArcs = new List<IArc>(original.inArcs);
      outArcs = new List<IArc>(original.outArcs);
    }

    public override IDeepCloneable Clone(Cloner cloner) {
      return new Vertex(this, cloner);
    }

    [StorableHook(HookType.AfterDeserialization)]
    private void AfterDeserialization() {
      if (Id == null) {
        id = Guid.NewGuid().ToString();
      }
    }

    // this method can be used to add arcs towards targets that are not visible in the graph 
    // (they do not appear in the nodes Dictionary). It is the programmers responsibility to 
    // enforce the correct and desired behavior.
    public void AddForwardArc(IArc arc) {
      if (arc.Source != this) { throw new Exception("AddForwardArc: Source should be equal to this."); }
      if (outArcs == null)
        outArcs = new List<IArc>();
      outArcs.Add(arc);
    }
    public void AddReverseArc(IArc arc) {
      if (arc.Target != this) { throw new Exception("AddReverseArc: Target should be equal to this."); };
      if (inArcs == null)
        inArcs = new List<IArc>();
      inArcs.Add(arc);
    }
    public int InDegree { get { return InArcs.Count(); } }
    public int OutDegree { get { return OutArcs.Count(); } }
    public int Degree { get { return InDegree + OutDegree; } }
  }

  [StorableClass]
  public class Vertex<T> : Vertex, IVertex<T> where T : class,IItem {
    public new T Content {
      get { return (T)base.Content; }
      set { base.Content = value; }
    }

    public Vertex() { }

    [StorableConstructor]
    protected Vertex(bool deserializing) : base(deserializing) { }

    protected Vertex(Vertex<T> original, Cloner cloner)
      : base(original, cloner) {
    }

    public override IDeepCloneable Clone(Cloner cloner) {
      return new Vertex<T>(this, cloner);
    }
  }
}