#region License Information
/* HeuristicLab
* Copyright (C) 2002-2012 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 HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
using HeuristicLab.Operators;
using HeuristicLab.Optimization;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
namespace HeuristicLab.Problems.LawnMower {
[StorableClass]
[Item("Lawn Mower Evaluator", "Evaluator for the lawn mower demo GP problem.")]
public class Evaluator : SingleSuccessorOperator, ISingleObjectiveEvaluator {
private const string QualityParameterName = "Quality";
private const string LawnMowerProgramParameterName = "LawnMowerProgram";
private const string LawnWidthParameterName = "LawnWidth";
private const string LawnLengthParameterName = "LawnLength";
public ILookupParameter QualityParameter {
get { return (ILookupParameter)Parameters[QualityParameterName]; }
}
public ILookupParameter LawnMowerProgramParameter {
get { return (ILookupParameter)Parameters[LawnMowerProgramParameterName]; }
}
public ILookupParameter LawnWidthParameter {
get { return (ILookupParameter)Parameters[LawnWidthParameterName]; }
}
public ILookupParameter LawnLengthParameter {
get { return (ILookupParameter)Parameters[LawnLengthParameterName]; }
}
[StorableConstructor]
protected Evaluator(bool deserializing) : base(deserializing) { }
protected Evaluator(Evaluator original, Cloner cloner)
: base(original, cloner) {
}
public Evaluator() {
Parameters.Add(new LookupParameter(QualityParameterName, "The solution quality of the lawn mower program."));
Parameters.Add(new LookupParameter(LawnMowerProgramParameterName, "The lawn mower program to evaluate represented as symbolic expression tree."));
Parameters.Add(new LookupParameter(LawnWidthParameterName, "The width of the lawn to mow."));
Parameters.Add(new LookupParameter(LawnLengthParameterName, "The length of the lawn to mow."));
}
[StorableHook(HookType.AfterDeserialization)]
private void AfterDeserialization() {
}
public override IDeepCloneable Clone(Cloner cloner) {
return new Evaluator(this, cloner);
}
public override IOperation Apply() {
int length = LawnLengthParameter.ActualValue.Value;
int width = LawnWidthParameter.ActualValue.Value;
ISymbolicExpressionTree tree = LawnMowerProgramParameter.ActualValue;
bool[,] lawn = Interpreter.EvaluateLawnMowerProgram(length, width, tree);
// count number of squares that have been mowed
int numberOfMowedCells = 0;
for (int i = 0; i < length; i++)
for (int j = 0; j < width; j++)
if (lawn[i, j]) {
numberOfMowedCells++;
}
QualityParameter.ActualValue = new DoubleValue(numberOfMowedCells);
return base.Apply();
}
}
}