source: trunk/sources/HeuristicLab.Operators/3.3/MultiOperator.cs @ 3591

Last change on this file since 3591 was 3591, checked in by gkronber, 12 years ago

Separated MultiOperator into two classes MultiOperator and CheckedMultiOperator. #992 (CheckedItemList and CheckedItemCollection is necessary)

File size: 5.8 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Collections.Generic;
24using System.Linq;
25using HeuristicLab.Collections;
26using HeuristicLab.Common;
27using HeuristicLab.Core;
28using HeuristicLab.Parameters;
29using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
30
31namespace HeuristicLab.Operators {
32  /// <summary>
33  /// A base class for operators which apply arbitrary many other operators of a specific type.
34  /// </summary>
35  [Item("MultiOperator<T>", "A base class for operators which apply arbitrary many other operators of a specific type.")]
36  [StorableClass]
37  public abstract class MultiOperator<T> : SingleSuccessorOperator where T : class, IOperator {
38    private List<IValueParameter<T>> operatorParameters;
39
40    [Storable]
41    private IItemList<T> operators;
42    public IItemList<T> Operators {
43      get { return operators; }
44      protected set {
45        if (operators != value) {
46          if (value == null) throw new ArgumentException();
47          DeregisterOperatorsEvents();
48          operators = value;
49          RegisterOperatorsEvents();
50        }
51      }
52    }
53
54    public MultiOperator()
55      : base() {
56      this.operators = new ItemList<T>();
57      Initialize();
58    }
59
60    [StorableConstructor]
61    protected MultiOperator(bool deserializing) : base(deserializing) { }
62
63    [StorableHook(HookType.AfterDeserialization)]
64    private void Initialize() {
65      if (operators != null) RegisterOperatorsEvents();
66      operatorParameters = new List<IValueParameter<T>>();
67      for (int i = 0; i < Operators.Count; i++) {
68        IValueParameter<T> opParam = (IValueParameter<T>)Parameters[i.ToString()];
69        operatorParameters.Add(opParam);
70        opParam.ValueChanged += new EventHandler(opParam_ValueChanged);
71      }
72    }
73
74    public override IDeepCloneable Clone(Cloner cloner) {
75      MultiOperator<T> clone = (MultiOperator<T>)base.Clone(cloner);
76      clone.operators = (IItemList<T>)cloner.Clone(operators);
77      clone.Initialize();
78      return clone;
79    }
80
81    private void UpdateOperatorParameters() {
82      foreach (IValueParameter<T> opParam in operatorParameters) {
83        opParam.ValueChanged -= new EventHandler(opParam_ValueChanged);
84        Parameters.Remove(opParam.Name);
85      }
86      operatorParameters.Clear();
87      for (int i = 0; i < Operators.Count; i++) {
88        IValueParameter<T> opParam = new ValueParameter<T>(i.ToString(), string.Empty, Operators[i]);
89        opParam.ValueChanged += new EventHandler(opParam_ValueChanged);
90        Parameters.Add(opParam);
91        operatorParameters.Add(opParam);
92      }
93    }
94
95    #region Events
96    private void RegisterOperatorsEvents() {
97      operators.ItemsAdded += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsAdded);
98      operators.ItemsRemoved += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsRemoved);
99      operators.ItemsReplaced += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsReplaced);
100      operators.ItemsMoved += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsMoved);
101      operators.CollectionReset += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_CollectionReset);
102    }
103    private void DeregisterOperatorsEvents() {
104      operators.ItemsAdded -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsAdded);
105      operators.ItemsRemoved -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsRemoved);
106      operators.ItemsReplaced -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsReplaced);
107      operators.ItemsMoved -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsMoved);
108      operators.CollectionReset -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_CollectionReset);
109    }
110    protected virtual void Operators_ItemsAdded(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
111      UpdateOperatorParameters();
112    }
113    protected virtual void Operators_ItemsRemoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
114      UpdateOperatorParameters();
115    }
116    protected virtual void Operators_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
117      foreach (IndexedItem<T> item in e.Items)
118        operatorParameters[item.Index].Value = item.Value;
119    }
120    protected virtual void Operators_ItemsMoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
121      foreach (IndexedItem<T> item in e.Items)
122        operatorParameters[item.Index].Value = item.Value;
123    }
124    protected virtual void Operators_CollectionReset(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
125      UpdateOperatorParameters();
126    }
127    private void opParam_ValueChanged(object sender, EventArgs e) {
128      IValueParameter<T> opParam = (IValueParameter<T>)sender;
129      operators[operatorParameters.IndexOf(opParam)] = opParam.Value;
130    }
131    #endregion
132  }
133}
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