[2526] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2008 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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| 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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| 23 | using System.Collections.Generic;
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| 24 | using System.Text;
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| 25 |
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| 26 | namespace HeuristicLab.Core {
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| 27 | /// <summary>
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| 28 | /// A helper class which is used to create deep clones of object graphs.
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| 29 | /// </summary>
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[2653] | 30 | public sealed class Cloner {
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| 31 | private class ReferenceEqualityComparer : IEqualityComparer<IDeepCloneable> {
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| 32 | bool IEqualityComparer<IDeepCloneable>.Equals(IDeepCloneable x, IDeepCloneable y) {
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[2526] | 33 | return object.ReferenceEquals(x, y);
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| 34 | }
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| 35 |
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[2653] | 36 | int IEqualityComparer<IDeepCloneable>.GetHashCode(IDeepCloneable obj) {
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| 37 | if (obj == null) return 0;
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| 38 | return obj.GetHashCode();
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[2526] | 39 | }
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| 40 | }
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| 41 |
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[2653] | 42 | private Dictionary<IDeepCloneable, IDeepCloneable> mapping;
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[2526] | 43 |
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| 44 | /// <summary>
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| 45 | /// Creates a new Cloner instance.
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| 46 | /// </summary>
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| 47 | public Cloner() {
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[2653] | 48 | mapping = new Dictionary<IDeepCloneable, IDeepCloneable>(new ReferenceEqualityComparer());
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[2526] | 49 | }
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| 50 |
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| 51 | /// <summary>
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[2653] | 52 | /// Creates a deep clone of a given deeply cloneable object.
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[2526] | 53 | /// </summary>
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[2653] | 54 | /// <param name="item">The object which should be cloned.</param>
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| 55 | /// <returns>A clone of the given object.</returns>
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| 56 | public IDeepCloneable Clone(IDeepCloneable obj) {
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| 57 | if (obj == null) return null;
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| 58 | IDeepCloneable clone;
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| 59 | if (mapping.TryGetValue(obj, out clone))
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[2526] | 60 | return clone;
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| 61 | else
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[2653] | 62 | return obj.Clone(this);
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[2526] | 63 | }
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| 64 | /// <summary>
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[2653] | 65 | /// Registers a new clone for a given deeply cloneable object.
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[2526] | 66 | /// </summary>
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[2653] | 67 | /// <param name="item">The original object.</param>
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| 68 | /// <param name="clone">The clone of the original object.</param>
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| 69 | public void RegisterClonedObject(IDeepCloneable item, IDeepCloneable clone) {
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[2526] | 70 | mapping.Add(item, clone);
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| 71 | }
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| 72 | }
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| 73 | }
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