#region License Information
/* HeuristicLab
* Copyright (C) 2002-2010 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 .
*/
#endregion
using System;
using System.Linq;
using HeuristicLab.Collections;
using HeuristicLab.Core;
using HeuristicLab.Operators;
using HeuristicLab.Optimization;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.Data;
using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Interfaces;
using HeuristicLab.PluginInfrastructure;
namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.ArchitectureManipulators {
[Item("MultiSymbolicExpressionTreeArchitectureManipulator", "Randomly selects and applies one of its architecture manipulators every time it is called.")]
[StorableClass]
public class MultiSymbolicExpressionTreeArchitectureManipulator : StochasticMultiBranch, ISymbolicExpressionTreeArchitectureManipulator, IStochasticOperator {
private const string MaxTreeSizeParameterName = "MaxTreeSize";
private const string MaxTreeHeightParameterName = "MaxTreeHeight";
private const string SymbolicExpressionGrammarParameterName = "SymbolicExpressionGrammar";
private const string SymbolicExpressionTreeParameterName = "SymbolicExpressionTree";
private const string MaxFunctionArgumentsParameterName = "MaxFunctionArguments";
private const string MaxFunctionDefiningBranchesParameterName = "MaxFunctionDefiningBranches";
public override bool CanChangeName {
get { return false; }
}
protected override bool CreateChildOperation {
get { return true; }
}
#region ISymbolicExpressionTreeArchitectureManipulator Members
public IValueLookupParameter MaxFunctionDefinitionsParameter {
get { return (IValueLookupParameter)Parameters[MaxFunctionDefiningBranchesParameterName]; }
}
public IValueLookupParameter MaxFunctionArgumentsParameter {
get { return (IValueLookupParameter)Parameters[MaxFunctionArgumentsParameterName]; }
}
#endregion
#region ISymbolicExpressionTreeManipulator Members
public ILookupParameter SymbolicExpressionTreeParameter {
get { return (ILookupParameter)Parameters[SymbolicExpressionTreeParameterName]; }
}
#endregion
#region ISymbolicExpressionTreeOperator Members
public IValueLookupParameter MaxTreeSizeParameter {
get { return (IValueLookupParameter)Parameters[MaxTreeSizeParameterName]; }
}
public IValueLookupParameter MaxTreeHeightParameter {
get { return (IValueLookupParameter)Parameters[MaxTreeHeightParameterName]; }
}
public ILookupParameter SymbolicExpressionGrammarParameter {
get { return (ILookupParameter)Parameters[SymbolicExpressionGrammarParameterName]; }
}
#endregion
[StorableConstructor]
private MultiSymbolicExpressionTreeArchitectureManipulator(bool deserializing) : base(deserializing) { }
public MultiSymbolicExpressionTreeArchitectureManipulator()
: base() {
Parameters.Add(new LookupParameter(SymbolicExpressionTreeParameterName, "The symbolic expression tree on which the operator should be applied."));
Parameters.Add(new ValueLookupParameter(MaxFunctionDefiningBranchesParameterName, "The maximal allowed number of function defining branches."));
Parameters.Add(new ValueLookupParameter(MaxFunctionArgumentsParameterName, "The maximal allowed number of arguments of a newly created function."));
Parameters.Add(new ValueLookupParameter(MaxTreeSizeParameterName, "The maximal size (number of nodes) of the symbolic expression tree."));
Parameters.Add(new ValueLookupParameter(MaxTreeHeightParameterName, "The maximal height of the symbolic expression tree (a tree with one node has height = 0)."));
Parameters.Add(new LookupParameter(SymbolicExpressionGrammarParameterName, "The grammar that defines the allowed symbols and syntax of the symbolic expression trees."));
foreach (Type type in ApplicationManager.Manager.GetTypes(typeof(ISymbolicExpressionTreeArchitectureManipulator))) {
if (!typeof(MultiOperator).IsAssignableFrom(type))
Operators.Add((ISymbolicExpressionTreeArchitectureManipulator)Activator.CreateInstance(type), true);
}
}
protected override void Operators_ItemsReplaced(object sender, CollectionItemsChangedEventArgs> e) {
base.Operators_ItemsReplaced(sender, e);
ParameterizeManipulators();
}
protected override void Operators_ItemsAdded(object sender, CollectionItemsChangedEventArgs> e) {
base.Operators_ItemsAdded(sender, e);
ParameterizeManipulators();
}
private void ParameterizeManipulators() {
foreach (ISymbolicExpressionTreeArchitectureManipulator manipulator in Operators.OfType()) {
manipulator.MaxTreeSizeParameter.ActualName = MaxTreeSizeParameter.Name;
manipulator.MaxTreeHeightParameter.ActualName = MaxTreeHeightParameter.Name;
manipulator.SymbolicExpressionGrammarParameter.ActualName = SymbolicExpressionGrammarParameter.Name;
manipulator.SymbolicExpressionTreeParameter.ActualName = SymbolicExpressionTreeParameter.Name;
manipulator.MaxFunctionDefinitionsParameter.ActualName = MaxFunctionArgumentsParameter.Name;
manipulator.MaxFunctionArgumentsParameter.ActualName = MaxFunctionArgumentsParameter.Name;
}
foreach (IStochasticOperator manipulator in Operators.OfType()) {
manipulator.RandomParameter.ActualName = RandomParameter.Name;
}
}
#region ISymbolicExpressionTreeArchitectureManipulator Members
public void ModifyArchitecture(IRandom random, SymbolicExpressionTree symbolicExpressionTree, ISymbolicExpressionGrammar grammar, IntValue maxTreeSize, IntValue maxTreeHeight, IntValue maxFunctionDefiningBranches, IntValue maxFunctionArguments, out bool success) {
var op = Operators.SelectRandom(random);
op.ModifyArchitecture(random, symbolicExpressionTree, grammar, maxTreeSize, maxTreeHeight, maxFunctionDefiningBranches, maxFunctionArguments, out success);
}
#endregion
}
}