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source: branches/HeuristicLab.EvolutionaryTracking/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Manipulators/MultiSymbolicExpressionTreeManipulator.cs @ 9416

Last change on this file since 9416 was 9416, checked in by bburlacu, 11 years ago

#1772: Fixed serialization of genetic fragments, added interface ISymbolicExpressionTreeNodeSimilarityComparer

File size: 7.5 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Collections.Generic;
24using System.Linq;
25using HeuristicLab.Collections;
26using HeuristicLab.Common;
27using HeuristicLab.Core;
28using HeuristicLab.Data;
29using HeuristicLab.Operators;
30using HeuristicLab.Optimization;
31using HeuristicLab.Parameters;
32using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
33using HeuristicLab.PluginInfrastructure;
34
35namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding {
36  [Item("MultiSymbolicExpressionTreeManipulator", "Randomly selects and applies one of its manipulators every time it is called.")]
37  [StorableClass]
38  public sealed class MultiSymbolicExpressionTreeManipulator : StochasticMultiBranch<ISymbolicExpressionTreeManipulator>,
39    ITracingSymbolicExpressionTreeOperator,
40    ISymbolicExpressionTreeManipulator,
41    IStochasticOperator,
42    ISymbolicExpressionTreeSizeConstraintOperator {
43    private const string SymbolicExpressionTreeParameterName = "SymbolicExpressionTree";
44    private const string MaximumSymbolicExpressionTreeLengthParameterName = "MaximumSymbolicExpressionTreeLength";
45    private const string MaximumSymbolicExpressionTreeDepthParameterName = "MaximumSymbolicExpressionTreeDepth";
46    private const string SymbolicExpressionTreeNodeComparerParameterName = "SymbolicExpressionTreeNodeComparer";
47    private const string SymbolicExpressionTreeNodeComparerParameterDescription = "The comparison operator used to check if two symbolic expression tree nodes are equal or similar.";
48
49    public override bool CanChangeName {
50      get { return false; }
51    }
52    protected override bool CreateChildOperation {
53      get { return true; }
54    }
55    public ValueParameter<ISymbolicExpressionTreeNodeSimilarityComparer> SymbolicExpressionTreeNodeComparerParameter {
56      get { return (ValueParameter<ISymbolicExpressionTreeNodeSimilarityComparer>)Parameters[SymbolicExpressionTreeNodeComparerParameterName]; }
57    }
58    public ISymbolicExpressionTreeNodeComparer SymbolicExpressionTreeNodeComparer {
59      get { return (ISymbolicExpressionTreeNodeComparer)SymbolicExpressionTreeNodeComparerParameter.ActualValue; }
60    }
61
62    #region Parameter Properties
63    public IValueLookupParameter<IntValue> MaximumSymbolicExpressionTreeLengthParameter {
64      get { return (IValueLookupParameter<IntValue>)Parameters[MaximumSymbolicExpressionTreeLengthParameterName]; }
65    }
66    public IValueLookupParameter<IntValue> MaximumSymbolicExpressionTreeDepthParameter {
67      get { return (IValueLookupParameter<IntValue>)Parameters[MaximumSymbolicExpressionTreeDepthParameterName]; }
68    }
69    public ILookupParameter<ISymbolicExpressionTree> SymbolicExpressionTreeParameter {
70      get { return (ILookupParameter<ISymbolicExpressionTree>)Parameters[SymbolicExpressionTreeParameterName]; }
71    }
72    #endregion
73
74    [StorableConstructor]
75    private MultiSymbolicExpressionTreeManipulator(bool deserializing) : base(deserializing) { }
76    private MultiSymbolicExpressionTreeManipulator(MultiSymbolicExpressionTreeManipulator original, Cloner cloner) : base(original, cloner) { }
77    public MultiSymbolicExpressionTreeManipulator()
78      : base() {
79      Parameters.Add(new LookupParameter<ISymbolicExpressionTree>(SymbolicExpressionTreeParameterName, "The symbolic expression tree on which the operator should be applied."));
80      Parameters.Add(new ValueLookupParameter<IntValue>(MaximumSymbolicExpressionTreeLengthParameterName, "The maximal length (number of nodes) of the symbolic expression tree."));
81      Parameters.Add(new ValueLookupParameter<IntValue>(MaximumSymbolicExpressionTreeDepthParameterName, "The maximal depth of the symbolic expression tree (a tree with one node has depth = 0)."));
82      Parameters.Add(new ValueParameter<ISymbolicExpressionTreeNodeSimilarityComparer>(SymbolicExpressionTreeNodeComparerParameterName, SymbolicExpressionTreeNodeComparerParameterDescription));
83
84      List<ISymbolicExpressionTreeManipulator> list = new List<ISymbolicExpressionTreeManipulator>();
85      foreach (Type type in ApplicationManager.Manager.GetTypes(typeof(ISymbolicExpressionTreeManipulator))) {
86        if (this.GetType().Assembly != type.Assembly) continue;
87        if (typeof(IMultiOperator<ISymbolicExpressionTreeManipulator>).IsAssignableFrom(type)) continue;
88        if (typeof(ISymbolicExpressionTreeArchitectureAlteringOperator).IsAssignableFrom(type)) continue;
89        list.Add((ISymbolicExpressionTreeManipulator)Activator.CreateInstance(type));
90      }
91      CheckedItemList<ISymbolicExpressionTreeManipulator> checkedItemList = new CheckedItemList<ISymbolicExpressionTreeManipulator>();
92      checkedItemList.AddRange(list.OrderBy(op => op.Name));
93      Operators = checkedItemList.AsReadOnly();
94      Operators_ItemsAdded(this, new CollectionItemsChangedEventArgs<IndexedItem<ISymbolicExpressionTreeManipulator>>(Operators.CheckedItems));
95    }
96
97    public override IDeepCloneable Clone(Cloner cloner) {
98      return new MultiSymbolicExpressionTreeManipulator(this, cloner);
99    }
100
101    protected override void Operators_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<IndexedItem<ISymbolicExpressionTreeManipulator>> e) {
102      base.Operators_ItemsReplaced(sender, e);
103      ParameterizeManipulators();
104    }
105
106    protected override void Operators_ItemsAdded(object sender, CollectionItemsChangedEventArgs<IndexedItem<ISymbolicExpressionTreeManipulator>> e) {
107      base.Operators_ItemsAdded(sender, e);
108      ParameterizeManipulators();
109    }
110
111    private void ParameterizeManipulators() {
112      foreach (IStochasticOperator manipulator in Operators.OfType<IStochasticOperator>()) {
113        manipulator.RandomParameter.ActualName = RandomParameter.Name;
114      }
115      foreach (ISymbolicExpressionTreeManipulator manipulator in Operators.OfType<ISymbolicExpressionTreeManipulator>()) {
116        manipulator.SymbolicExpressionTreeParameter.ActualName = SymbolicExpressionTreeParameter.Name;
117      }
118      foreach (ISymbolicExpressionTreeSizeConstraintOperator manipulator in Operators.OfType<ISymbolicExpressionTreeSizeConstraintOperator>()) {
119        manipulator.MaximumSymbolicExpressionTreeDepthParameter.ActualName = MaximumSymbolicExpressionTreeDepthParameter.Name;
120        manipulator.MaximumSymbolicExpressionTreeLengthParameter.ActualName = MaximumSymbolicExpressionTreeLengthParameter.Name;
121      }
122      var comparers = ApplicationManager.Manager.GetInstances<ISymbolicExpressionTreeNodeSimilarityComparer>().ToList();
123      if (comparers.Count > 0)
124        foreach (var manipulator in Operators.OfType<ITracingSymbolicExpressionTreeOperator>()) {
125          manipulator.SymbolicExpressionTreeNodeComparerParameter.ActualValue = comparers.First();
126        }
127    }
128  }
129}
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