#region License Information
/* HeuristicLab
* Copyright (C) 2002-2011 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 System.Text;
using HeuristicLab.Operators;
using HeuristicLab.Optimization;
using HeuristicLab.Core;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.Common;
using HeuristicLab.Data;
using HeuristicLab.Parameters;
namespace HeuristicLab.Algorithms.VariableNeighborhoodSearch {
///
/// A shaking operator for VNS.
///
[Item("ShakingOperator", "A shaking operator for VNS.")]
[StorableClass]
public class ShakingOperator: CheckedMultiOperator {
public IValueLookupParameter IndexParameter {
get { return (ValueLookupParameter)Parameters["Index"]; }
}
public ILookupParameter ContinueParameter {
get { return (LookupParameter)Parameters["Continue"]; }
}
[StorableConstructor]
protected ShakingOperator(bool deserializing) : base(deserializing) { }
protected ShakingOperator(ShakingOperator original, Cloner cloner) : base(original, cloner) { }
public override IDeepCloneable Clone(Cloner cloner) {
return new ShakingOperator(this, cloner);
}
public ShakingOperator()
: base() {
Parameters.Add(new ValueLookupParameter("Index", "The index of the operator that should be applied (k)."));
Parameters.Add(new LookupParameter("Continue", "True if k <= available operators."));
}
public override IOperation Apply() {
int index = IndexParameter.ActualValue.Value;
var operators = base.Operators.CheckedItems.ToList();
IOperator successor = null;
if (index >= operators.Count - 1) {
ContinueParameter.ActualValue = new BoolValue(false);
} else {
ContinueParameter.ActualValue = new BoolValue(true);
}
if (index >= 0 && index < operators.Count) {
successor = operators[index].Value;
}
OperationCollection next = new OperationCollection(base.Apply());
if (successor != null)
next.Insert(0, ExecutionContext.CreateOperation(successor));
return next;
}
}
}