#region License Information /* HeuristicLab * Copyright (C) 2002-2015 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.Collections.Generic; using System.Linq; using HeuristicLab.Common; using HeuristicLab.Core; using HeuristicLab.Parameters; using HeuristicLab.Persistence.Default.CompositeSerializers.Storable; namespace HeuristicLab.Optimization { [StorableClass] public abstract class Problem : Problem, IHeuristicOptimizationProblem, IProblemDefinition, IStorableContent where TEncoding : class, IEncoding where TSolution : class, ISolution where TEvaluator : class, IEvaluator { public string Filename { get; set; } // TODO: Really okay here? should be in Problem (non-generic) //TODO remove parametr for encoding? protected IValueParameter EncodingParameter { get { return (IValueParameter)Parameters["Encoding"]; } } //mkommend necessary for reuse of operators if the encoding changes private TEncoding oldEncoding; public TEncoding Encoding { get { return EncodingParameter.Value; } protected set { if (value == null) throw new ArgumentNullException("Encoding must not be null."); EncodingParameter.Value = value; } } ISolutionCreator IHeuristicOptimizationProblem.SolutionCreator { get { return Encoding.SolutionCreator; } } IParameter IHeuristicOptimizationProblem.SolutionCreatorParameter { get { return Encoding.SolutionCreatorParameter; } } event EventHandler IHeuristicOptimizationProblem.SolutionCreatorChanged { add { Encoding.SolutionCreatorChanged += value; } remove { Encoding.SolutionCreatorChanged -= value; } } //TODO is a parameter for the evaluator really necessary, only single-objective or multi-objective evulators calling the func are possible public ValueParameter EvaluatorParameter { get { return (ValueParameter)Parameters["Evaluator"]; } } public TEvaluator Evaluator { get { return EvaluatorParameter.Value; } protected set { EvaluatorParameter.Value = value; } } IEvaluator IHeuristicOptimizationProblem.Evaluator { get { return Evaluator; } } IParameter IHeuristicOptimizationProblem.EvaluatorParameter { get { return EvaluatorParameter; } } public event EventHandler EvaluatorChanged; protected virtual void OnEvaluatorChanged() { EventHandler handler = EvaluatorChanged; if (handler != null) handler(this, EventArgs.Empty); } // TODO: There is no way to access the Operators collection other than through OperatorParameter.Value protected override IEnumerable GetOperators() { if (Encoding == null) return base.GetOperators(); return base.GetOperators().Concat(Encoding.Operators); } public override IEnumerable ExecutionContextItems { get { if (Encoding == null) return base.ExecutionContextItems; return base.ExecutionContextItems.Concat(new[] { Encoding }); } } protected Problem() : base() { Parameters.Add(new ValueParameter("Encoding", "Describes the configuration of the encoding, what the variables are called, what type they are and their bounds if any.")); Parameters.Add(new ValueParameter("Evaluator", "The operator used to evaluate a solution.")); if (Encoding != null) { oldEncoding = Encoding; Parameterize(); } RegisterEvents(); } protected Problem(TEncoding encoding) { if (encoding == null) throw new ArgumentNullException("encoding"); Parameters.Add(new ValueParameter("Encoding", "Describes the configuration of the encoding, what the variables are called, what type they are and their bounds if any.", encoding)); Parameters.Add(new ValueParameter("Evaluator", "The operator used to evaluate a solution.")); oldEncoding = Encoding; Parameterize(); RegisterEvents(); } protected Problem(Problem original, Cloner cloner) : base(original, cloner) { oldEncoding = cloner.Clone(original.oldEncoding); RegisterEvents(); } [StorableConstructor] protected Problem(bool deserializing) : base(deserializing) { } [StorableHook(HookType.AfterDeserialization)] private void AfterDeserialization() { oldEncoding = Encoding; RegisterEvents(); } private void RegisterEvents() { EncodingParameter.ValueChanged += (o, e) => OnEncodingChanged(); EvaluatorParameter.ValueChanged += (o, e) => OnEvaluatorChanged(); //var multiEncoding = Encoding as MultiEncoding; //if (multiEncoding != null) multiEncoding.EncodingsChanged += MultiEncodingOnEncodingsChanged; } protected virtual void OnEncodingChanged() { Parameterize(); OnOperatorsChanged(); OnReset(); } private void Parameterize() { if (oldEncoding != null) { AdaptEncodingOperators(oldEncoding, Encoding); //var oldMultiEncoding = oldEncoding as MultiEncoding; //if (oldMultiEncoding != null) // oldMultiEncoding.EncodingsChanged -= MultiEncodingOnEncodingsChanged; } oldEncoding = Encoding; foreach (var op in Operators.OfType>()) op.EncodingParameter.ActualName = EncodingParameter.Name; //var multiEncoding = Encoding as MultiEncoding; //if (multiEncoding != null) multiEncoding.EncodingsChanged += MultiEncodingOnEncodingsChanged; } //protected override void OnSolutionCreatorChanged() { // base.OnSolutionCreatorChanged(); // Encoding.SolutionCreator = SolutionCreator; //} private static void AdaptEncodingOperators(IEncoding oldEncoding, IEncoding newEncoding) { if (oldEncoding.GetType() != newEncoding.GetType()) return; if (oldEncoding is CombinedEncoding) { var oldMultiEncoding = (CombinedEncoding)oldEncoding; var newMultiEncoding = (CombinedEncoding)newEncoding; if (!oldMultiEncoding.Encodings.SequenceEqual(newMultiEncoding.Encodings, new TypeEqualityComparer())) return; var nestedEncodings = oldMultiEncoding.Encodings.Zip(newMultiEncoding.Encodings, (o, n) => new { oldEnc = o, newEnc = n }); foreach (var multi in nestedEncodings) AdaptEncodingOperators(multi.oldEnc, multi.newEnc); } var comparer = new TypeEqualityComparer(); var cloner = new Cloner(); var oldOperators = oldEncoding.Operators; var newOperators = newEncoding.Operators; cloner.RegisterClonedObject(oldEncoding, newEncoding); var operators = oldOperators.Intersect(newOperators, comparer) .Select(cloner.Clone) .Union(newOperators, comparer).ToList(); newEncoding.ConfigureOperators(operators); newEncoding.Operators = operators; } } }