source: branches/HeuristicLab.BinPacking/HeuristicLab.Problems.BinPacking.2D/3.3/RectangularIdenticalBinPackingProblem.cs @ 14042

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2015 Joseph Helm and 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 <http://www.gnu.org/licenses/>.
 */
#endregion

using HeuristicLab.Problems.BinPacking.Dimensions;
using HeuristicLab.Problems.BinPacking.Interfaces;
using HeuristicLab.Problems.BinPacking.PackingBin;
using HeuristicLab.Problems.BinPacking.PackingItem;
using HeuristicLab.Core;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.Common;
using HeuristicLab.Problems.BinPacking.Evaluators;
using HeuristicLab.Encodings.PermutationEncoding;
using HeuristicLab.PluginInfrastructure;
using HeuristicLab.Encodings.PackingEncoding.PackingSequence;
using HeuristicLab.Encodings.PackingEncoding.GroupingVector;
using HeuristicLab.Problems.Instances;
using HeuristicLab.Encodings.PackingEncoding.MultiComponentVector;
using HeuristicLab.Data;
using System;

namespace HeuristicLab.Problems.BinPacking.Problem {
  [Item("Bin Packing Problem (2D, identical rectangles) (BPP)", "Represents a two-dimensional bin-packing problem using only bins with identical measures and bins/items with rectangular shapes.")]
  [StorableClass]
  [Creatable(CreatableAttribute.Categories.CombinatorialProblems, Priority = 300)]
  // TODO: only support 2d BPPData
  public class RectangularIdenticalBinPackingProblem : BinPackingProblem<TwoDimensionalPacking, RectangularPackingBin, RectangularPackingItem>, IProblemInstanceConsumer<BPPData>, IProblemInstanceExporter<BPPData> {

    #region Default Instance
    private static readonly BPPData DefaultInstance = new BPPData() {
      Name = "2D BPP Default Instance",
      Description = "The default instance for 2D Bin Packing.",
      BinMeasures = new int[] { 20, 16 },
      ItemMeasures = new int[][] {
        new int[] {3,8},
        new int[] {5,3},
        new int[] {9,3},
        new int[] {2,7},
        new int[] {5,3},
        new int[] {9,3},
        new int[] {2,7},
        new int[] {5,3},
        new int[] {9,3},
        new int[] {2,7},
        new int[] {5,3},
        new int[] {9,3},
        new int[] {2,7},
        new int[] {5,3},
        new int[] {9,3},
        new int[] {2,7},
        new int[] {5,3},
        new int[] {9,3},
        new int[] {2,7},
        new int[] {5,3},
        new int[] {9,3},
        new int[] {2,7},
        new int[] {5,3},
        new int[] {9,3},
        new int[] {2,7},
        new int[] {5,3},
        new int[] {9,3},
        new int[] {2,7},
        new int[] {5,3},
        new int[] {9,3},
        new int[] {2,7},
        new int[] {5,3},
        new int[] {9,3},
        new int[] {2,7},
        new int[] {5,3},
        new int[] {9,3},
        new int[] {2,7}
      },
      Items = 30
    };
    #endregion

    [StorableConstructor]
    protected RectangularIdenticalBinPackingProblem(bool deserializing) : base(deserializing) { }
    protected RectangularIdenticalBinPackingProblem(RectangularIdenticalBinPackingProblem original, Cloner cloner)
      : base(original, cloner) {
    }
    public override IDeepCloneable Clone(Cloner cloner) {
      return new RectangularIdenticalBinPackingProblem(this, cloner);
    }
    public RectangularIdenticalBinPackingProblem() : base(
      new PackingPlanEvaluationAlgorithm<Permutation, TwoDimensionalPacking, RectangularPackingBin, RectangularPackingItem>()) {
    }

    #region Problem instance handling
    public void Load(BPPData data) {
      var realData = data as RealBPPData;
      var binData = new RectangularPackingBin(data.BinMeasures[0], data.BinMeasures[1]);

      var itemData = new ItemList<RectangularPackingItem>(data.Items);
      for (int j = 0; j < data.Items; j++) {
        var bin = new RectangularPackingBin(data.BinMeasures[0], data.BinMeasures[1]);
        var item = new RectangularPackingItem(data.ItemMeasures[j][0], data.ItemMeasures[j][1], bin);
        if (realData != null) {
          item.Weight = realData.ItemWeights[j];
          item.Material = realData.ItemMaterials[j];
        }
        itemData.Add(item);
      }

      BestKnownQuality = data.BestKnownQuality.HasValue ? new DoubleValue(data.BestKnownQuality.Value) : null;

      PackingBinMeasures = binData;
      PackingItemMeasures = itemData;

      ApplyHorizontalOrientation();
      SortItems();
      PackingItemsParameter.Value.Value = PackingItemMeasures.Count;
      LowerBoundParameter.Value.Value = CalculateLowerBound();
    }


    public BPPData Export() {
      var result = new BPPData {
        Name = Name,
        Description = Description,
        Items = PackingItemsParameter.Value.Value,
        BinMeasures = new int[] { PackingBinMeasures.Width, PackingBinMeasures.Height }
      };

      var itemMeasures = new int[result.Items][];
      int i = 0;
      foreach (var item in PackingItemMeasures) {
        itemMeasures[i] = new int[] { item.Width, item.Height };
        i++;
      }
      result.ItemMeasures = itemMeasures;
      return result;
    }
    #endregion

    #region Helpers
    protected override void InitializeDecoder() {
      // Operators.RemoveAll(op => op is I3DOperator); TODO

      PackingSolutionDecoderParameter.ValidValues.Clear();
      if (SolutionCreator is PackingSequenceRandomCreator) {
        PackingSolutionDecoderParameter.ValidValues.UnionWith(ApplicationManager.Manager.GetInstances<I2DPSDecoder>());
      } else if (SolutionCreator is GroupingVectorRandomCreator) {
        PackingSolutionDecoderParameter.ValidValues.UnionWith(ApplicationManager.Manager.GetInstances<I2DGVDecoder>());
      } else if (SolutionCreator is MultiComponentVectorRandomCreator) {
        PackingSolutionDecoderParameter.ValidValues.UnionWith(ApplicationManager.Manager.GetInstances<I2DMCVDecoder>());
      } else {
        string error = "The given problem does not support the selected solution-creator.";
        ErrorHandling.ShowErrorDialog(error, null);
      }
    }

    protected override IPackingPlanEvaluator CreateDefaultEvaluator() {
      return new PackingRatioRectangularIdenticalBinEvaluator();
    }

    protected override void InitializeProblemData() {
      Load(DefaultInstance);
    }

    protected override void RemoveTooBigItems() {
      PackingItemMeasures.RemoveAll(pi =>
        !PackingBinMeasures.Encloses(new TwoDimensionalPacking(0, 0, 0, false), pi) &&
        !PackingBinMeasures.Encloses(new TwoDimensionalPacking(0, 0, 0, true), pi));
    }
    #endregion
  }
}