[10267] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[10278] | 3 | * Copyright (C) 2002-2014 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[10267] | 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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| 23 | using System.Collections.Generic;
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| 24 | using System.Drawing;
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| 25 | using System.Linq;
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| 26 | using HeuristicLab.Common;
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[11241] | 27 | using HeuristicLab.Common.Resources;
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[10267] | 28 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 29 |
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[11241] | 30 | namespace HeuristicLab.Core {
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[10278] | 31 | [Item("DirectedGraph", "Generic class representing a directed graph with custom vertices and content")]
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[10267] | 32 | [StorableClass]
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[10300] | 33 | public class DirectedGraph : Item, IDirectedGraph {
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[11241] | 34 | public override Image ItemImage { get { return VSImageLibrary.Graph; } }
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| 35 |
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| 36 | private HashSet<IVertex> vertices;
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[10267] | 37 | [Storable]
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[10903] | 38 | public IEnumerable<IVertex> Vertices {
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| 39 | get { return vertices; }
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[11229] | 40 | private set { vertices = new HashSet<IVertex>(value); }
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[10267] | 41 | }
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[10884] | 42 |
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[11241] | 43 | private HashSet<IArc> arcs;
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[10300] | 44 | [Storable]
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[10903] | 45 | public IEnumerable<IArc> Arcs {
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| 46 | get { return arcs; }
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[11229] | 47 | private set { arcs = new HashSet<IArc>(value); }
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[10903] | 48 | }
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| 49 |
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[11241] | 50 | public DirectedGraph() {
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| 51 | vertices = new HashSet<IVertex>();
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| 52 | arcs = new HashSet<IArc>();
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| 53 | }
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| 54 |
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| 55 | protected DirectedGraph(DirectedGraph original, Cloner cloner)
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| 56 | : base(original, cloner) {
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| 57 | vertices = new HashSet<IVertex>(original.vertices.Select(cloner.Clone));
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| 58 | arcs = new HashSet<IArc>(original.arcs.Select(cloner.Clone));
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| 59 | }
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| 60 |
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| 61 | public override IDeepCloneable Clone(Cloner cloner) {
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| 62 | return new DirectedGraph(this, cloner);
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| 63 | }
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| 64 |
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[10897] | 65 | [StorableConstructor]
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| 66 | protected DirectedGraph(bool serializing)
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| 67 | : base(serializing) {
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| 68 | }
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| 69 |
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[10903] | 70 | [StorableHook(HookType.AfterDeserialization)]
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| 71 | private void AfterDeserialization() {
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[11229] | 72 | foreach (var vertex in vertices) {
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[11249] | 73 | vertex.ArcAdded += Vertex_ArcAdded;
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| 74 | vertex.ArcRemoved += Vertex_ArcRemoved;
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[10903] | 75 | }
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| 76 |
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[11229] | 77 | foreach (var arc in arcs) {
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| 78 | var source = arc.Source;
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| 79 | var target = arc.Target;
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| 80 | source.AddArc(arc);
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| 81 | target.AddArc(arc);
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[10903] | 82 | }
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| 83 | }
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| 84 |
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[11229] | 85 | public virtual void Clear() {
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| 86 | vertices.Clear();
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| 87 | arcs.Clear();
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[10267] | 88 | }
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| 89 |
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[11229] | 90 | public virtual void AddVertex(IVertex vertex) {
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| 91 | vertices.Add(vertex);
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| 92 | // register event handlers
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[11249] | 93 | vertex.ArcAdded += Vertex_ArcAdded;
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| 94 | vertex.ArcRemoved += Vertex_ArcRemoved;
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| 95 | OnVertedAdded(this, new EventArgs<IVertex>(vertex));
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[10300] | 96 | }
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[10884] | 97 |
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[11229] | 98 | public virtual void RemoveVertex(IVertex vertex) {
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| 99 | vertices.Remove(vertex);
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| 100 | // remove connections to/from the removed vertex
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[11238] | 101 | var arcList = vertex.InArcs.Concat(vertex.OutArcs).ToList(); // avoid invalid operation exception: "collection was modified" below
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[11234] | 102 | foreach (var arc in arcList)
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[11229] | 103 | RemoveArc(arc);
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| 104 | // deregister event handlers
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[11249] | 105 | vertex.ArcAdded -= Vertex_ArcAdded;
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| 106 | vertex.ArcRemoved -= Vertex_ArcRemoved;
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| 107 | OnVertexRemoved(this, new EventArgs<IVertex>(vertex));
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[10884] | 108 | }
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| 109 |
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[11241] | 110 | public virtual IArc AddArc(IVertex source, IVertex target) {
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[11229] | 111 | var arc = new Arc(source, target);
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| 112 | AddArc(arc);
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| 113 | return arc;
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[10300] | 114 | }
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[10897] | 115 |
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[11241] | 116 | public virtual void AddArc(IArc arc) {
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[11229] | 117 | var source = (Vertex)arc.Source;
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| 118 | var target = (Vertex)arc.Target;
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| 119 | source.AddArc(arc);
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| 120 | target.AddArc(arc);
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| 121 | arcs.Add(arc);
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[10267] | 122 | }
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[10897] | 123 |
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[11241] | 124 | public virtual void RemoveArc(IArc arc) {
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[11229] | 125 | arcs.Remove(arc);
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| 126 | var source = (Vertex)arc.Source;
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| 127 | var target = (Vertex)arc.Target;
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| 128 | source.RemoveArc(arc);
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| 129 | target.RemoveArc(arc);
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[10267] | 130 | }
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[10897] | 131 |
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[11249] | 132 | protected virtual void Vertex_ArcAdded(object sender, EventArgs<IArc> args) {
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| 133 | // the ArcAdded event is fired by a vertex when an arc from/to another vertex is added to its list of connections
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| 134 | // because the arc is added in both directions by both the source and the target, this event will get fired twice here
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[11229] | 135 | var arc = args.Value;
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[11249] | 136 | if (arcs.Add(arc)) OnArcAdded(this, new EventArgs<IArc>(arc));
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[10888] | 137 | }
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| 138 |
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[11249] | 139 | protected virtual void Vertex_ArcRemoved(object sender, EventArgs<IArc> args) {
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[11229] | 140 | var arc = args.Value;
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[11249] | 141 | if (arcs.Remove(arc)) OnArcRemoved(this, new EventArgs<IArc>(arc));
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[10267] | 142 | }
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[10888] | 143 |
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[11238] | 144 | // events
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[11250] | 145 | public event EventHandler<EventArgs<IVertex> VertexAdded;
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[11249] | 146 | protected virtual void OnVertedAdded(object sender, EventArgs<IVertex> args) {
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[11248] | 147 | var added = VertexAdded;
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| 148 | if (added != null)
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| 149 | added(sender, args);
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| 150 | }
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| 151 |
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[11250] | 152 | public event EventHandler<EventArgs<IVertex>> VertexRemoved;
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[11249] | 153 | protected virtual void OnVertexRemoved(object sender, EventArgs<IVertex> args) {
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[11248] | 154 | var removed = VertexRemoved;
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| 155 | if (removed != null)
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| 156 | removed(sender, args);
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| 157 | }
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| 158 |
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[11250] | 159 | public event EventHandler<EventArgs<IArc>> ArcAdded;
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[11249] | 160 | protected virtual void OnArcAdded(object sender, EventArgs<IArc> args) {
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[11248] | 161 | var added = ArcAdded;
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| 162 | if (added != null)
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| 163 | added(sender, args);
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| 164 | }
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| 165 |
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[11250] | 166 | public event EventHandler<EventArgs<IArc>> ArcRemoved;
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[11249] | 167 | protected virtual void OnArcRemoved(object sender, EventArgs<IArc> args) {
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[11248] | 168 | var removed = ArcRemoved;
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| 169 | if (removed != null)
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| 170 | removed(sender, args);
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| 171 | }
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[10267] | 172 | }
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| 173 | }
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