source: branches/histogram/HeuristicLab.Operators/3.3/MultiOperator.cs @ 6055

Last change on this file since 6055 was 6055, checked in by abeham, 11 years ago

#1465

  • updated branch from trunk
File size: 6.0 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2011 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 HeuristicLab.Collections;
25using HeuristicLab.Common;
26using HeuristicLab.Core;
27using HeuristicLab.Parameters;
28using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
29
30namespace HeuristicLab.Operators {
31  /// <summary>
32  /// A base class for operators which apply arbitrary many other operators of a specific type.
33  /// </summary>
34  [Item("MultiOperator", "A base class for operators which apply arbitrary many other operators of a specific type.")]
35  [StorableClass]
36  public abstract class MultiOperator<T> : SingleSuccessorOperator, IMultiOperator<T> where T : class, IOperator {
37    private List<IValueParameter<T>> operatorParameters;
38
39    [Storable]
40    private IItemList<T> operators;
41    public IItemList<T> Operators {
42      get { return operators; }
43      protected set {
44        if (operators != value) {
45          if (value == null) throw new ArgumentException();
46          DeregisterOperatorsEvents();
47          operators = value;
48          RegisterOperatorsEvents();
49        }
50      }
51    }
52
53    [StorableConstructor]
54    protected MultiOperator(bool deserializing) : base(deserializing) { }
55    protected MultiOperator(MultiOperator<T> original, Cloner cloner)
56      : base(original, cloner) {
57      this.operators = cloner.Clone<IItemList<T>>(original.operators);
58      Initialize();
59    }
60    public MultiOperator()
61      : base() {
62      this.operators = new ItemList<T>();
63      Initialize();
64    }
65
66    [StorableHook(HookType.AfterDeserialization)]
67    private void AfterDeserialization() {
68      Initialize();
69    }
70
71    private void Initialize() {
72      if (operators != null) RegisterOperatorsEvents();
73      operatorParameters = new List<IValueParameter<T>>();
74      for (int i = 0; i < Operators.Count; i++) {
75        IValueParameter<T> opParam = (IValueParameter<T>)Parameters[i.ToString()];
76        operatorParameters.Add(opParam);
77        opParam.ValueChanged += new EventHandler(opParam_ValueChanged);
78      }
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 OptionalValueParameter<T>(i.ToString(), string.Empty, Operators[i]);
89        opParam.Hidden = true;
90        opParam.ValueChanged += new EventHandler(opParam_ValueChanged);
91        Parameters.Add(opParam);
92        operatorParameters.Add(opParam);
93      }
94    }
95
96    #region Events
97    private void RegisterOperatorsEvents() {
98      operators.ItemsAdded += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsAdded);
99      operators.ItemsRemoved += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsRemoved);
100      operators.ItemsReplaced += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsReplaced);
101      operators.ItemsMoved += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsMoved);
102      operators.CollectionReset += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_CollectionReset);
103    }
104    private void DeregisterOperatorsEvents() {
105      operators.ItemsAdded -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsAdded);
106      operators.ItemsRemoved -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsRemoved);
107      operators.ItemsReplaced -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsReplaced);
108      operators.ItemsMoved -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsMoved);
109      operators.CollectionReset -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_CollectionReset);
110    }
111    protected virtual void Operators_ItemsAdded(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
112      UpdateOperatorParameters();
113    }
114    protected virtual void Operators_ItemsRemoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
115      UpdateOperatorParameters();
116    }
117    protected virtual void Operators_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
118      foreach (IndexedItem<T> item in e.Items)
119        operatorParameters[item.Index].Value = item.Value;
120    }
121    protected virtual void Operators_ItemsMoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
122      foreach (IndexedItem<T> item in e.Items)
123        operatorParameters[item.Index].Value = item.Value;
124    }
125    protected virtual void Operators_CollectionReset(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
126      UpdateOperatorParameters();
127    }
128    private void opParam_ValueChanged(object sender, EventArgs e) {
129      IValueParameter<T> opParam = (IValueParameter<T>)sender;
130      if (opParam.Value == null)
131        operators.RemoveAt(operatorParameters.IndexOf(opParam));
132      else
133        operators[operatorParameters.IndexOf(opParam)] = opParam.Value;
134    }
135    #endregion
136  }
137}
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