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source: branches/3.1/sources/HeuristicLab.Data/ConstrainedItemList.cs @ 8084

Last change on this file since 8084 was 1204, checked in by abeham, 16 years ago

fixed bug #483 in branch 3.1

File size: 7.3 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2008 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;
24using System.Collections.Generic;
25using System.Text;
26using System.Xml;
27using HeuristicLab.Core;
28
29namespace HeuristicLab.Data {
30  public class ConstrainedItemList : ConstrainedItemBase, IEnumerable, IEnumerable<IItem> {
31    private List<IItem> list;
32    private bool suspendConstraintCheck;
33
34    public bool ConstraintCheckSuspended {
35      get { return suspendConstraintCheck; }
36    }
37
38    public ConstrainedItemList()
39      : base() {
40      list = new List<IItem>();
41      suspendConstraintCheck = false;
42    }
43
44    public override IView CreateView() {
45      return new ConstrainedItemListView(this);
46    }
47
48    #region Clone & Persistence
49    public override object Clone(IDictionary<Guid, object> clonedObjects) {
50      ConstrainedItemList clone = new ConstrainedItemList();
51      clonedObjects.Add(Guid, clone);
52      foreach (IConstraint constraint in Constraints)
53        clone.AddConstraint((IConstraint)Auxiliary.Clone(constraint, clonedObjects));
54      clone.suspendConstraintCheck = suspendConstraintCheck;
55      foreach (IItem item in list) {
56        clone.list.Add((IItem)Auxiliary.Clone(item, clonedObjects));
57      }
58      return clone;
59    }
60
61    public override XmlNode GetXmlNode(string name, XmlDocument document, IDictionary<Guid,IStorable> persistedObjects) {
62      XmlNode node = base.GetXmlNode(name, document, persistedObjects);
63      XmlNode listNode = document.CreateNode(XmlNodeType.Element, "ListItems", null);
64      for (int i = 0; i < list.Count; i++)
65        listNode.AppendChild(PersistenceManager.Persist(list[i], document, persistedObjects));
66      XmlAttribute sccAttrib = document.CreateAttribute("SuspendConstraintCheck");
67      sccAttrib.Value = suspendConstraintCheck.ToString();
68      listNode.Attributes.Append(sccAttrib);
69      node.AppendChild(listNode);
70      return node;
71    }
72
73    public override void Populate(XmlNode node, IDictionary<Guid,IStorable> restoredObjects) {
74      base.Populate(node, restoredObjects);
75      XmlNode listNode = node.SelectSingleNode("ListItems");
76      list = new List<IItem>();
77      for (int i = 0; i < listNode.ChildNodes.Count; i++)
78        list.Add((IItem)PersistenceManager.Restore(listNode.ChildNodes[i], restoredObjects));
79      suspendConstraintCheck = bool.Parse(listNode.Attributes["SuspendConstraintCheck"].Value);
80    }
81    #endregion
82
83    public override string ToString() {
84      if (list.Count > 0) {
85        StringBuilder builder = new StringBuilder();
86        builder.Append(list[0].ToString());
87        for (int i = 1; i < list.Count; i++) {
88          builder.Append(";");
89          builder.Append(list[i].ToString());
90        }
91        return builder.ToString();
92      } else {
93        return "Empty List";
94      }
95    }
96
97    public int IndexOf(IItem item) {
98      return list.IndexOf(item);
99    }
100
101    public void BeginCombinedOperation() {
102      suspendConstraintCheck = true;
103    }
104
105    public bool EndCombinedOperation(out ICollection<IConstraint> violatedConstraints) {
106      if (IsValid(out violatedConstraints))
107        suspendConstraintCheck = false;
108      else
109        suspendConstraintCheck = true;
110
111      return !suspendConstraintCheck;
112    }
113
114    public bool TryInsert(int index, IItem item, out ICollection<IConstraint> violatedConstraints) {
115      list.Insert(index, item);
116      if (suspendConstraintCheck || IsValid(out violatedConstraints)) {
117        OnItemAdded(item, index);
118        return true;
119      } else {
120        violatedConstraints = new List<IConstraint>();
121        list.RemoveAt(index);
122        return false;
123      }
124    }
125
126    public bool TryRemoveAt(int index, out ICollection<IConstraint> violatedConstraints) {
127      IItem item = list[index];
128      list.RemoveAt(index);
129      if (suspendConstraintCheck || IsValid(out violatedConstraints)) {
130        OnItemRemoved(item, index);
131        return true;
132      } else {
133        violatedConstraints = new List<IConstraint>();
134        list.Insert(index, item);
135        return false;
136      }
137    }
138
139    public IItem this[int index] {
140      get { return list[index]; }
141    }
142
143    public bool TrySetAt(int index, IItem item, out ICollection<IConstraint> violatedConstraints) {
144      IItem backup = this[index];
145      list[index] = item;
146      if (suspendConstraintCheck || IsValid(out violatedConstraints)) {
147        return true;
148      } else {
149        violatedConstraints = new List<IConstraint>();
150        list[index] = backup;
151        return false;
152      }
153    }
154
155    public bool TryAdd(IItem item, out ICollection<IConstraint> violatedConstraints) {
156      list.Add(item);
157      if (suspendConstraintCheck || IsValid(out violatedConstraints)) {
158        OnItemAdded(item, list.Count - 1);
159        return true;
160      } else {
161        violatedConstraints = new List<IConstraint>();
162        list.RemoveAt(list.Count - 1);
163        return false;
164      }
165    }
166    public void Clear() {
167      list.Clear();
168      OnCleared();
169    }
170    public bool Contains(IItem item) {
171      return list.Contains(item);
172    }
173    public void CopyTo(IItem[] array, int arrayIndex) {
174      list.CopyTo(array, arrayIndex);
175    }
176    public int Count {
177      get { return list.Count; }
178    }
179    public bool IsReadOnly {
180      get { return false; }
181    }
182    public bool TryRemove(IItem item, out ICollection<IConstraint> violatedConstraints) {
183      int index = list.IndexOf(item);
184      if (index >= 0) {
185        return TryRemoveAt(index, out violatedConstraints);
186      } else {
187        violatedConstraints = new List<IConstraint>();
188        return false;
189      }
190    }
191
192    public IEnumerator<IItem> GetEnumerator() {
193      return list.GetEnumerator();
194    }
195
196    IEnumerator IEnumerable.GetEnumerator() {
197      return list.GetEnumerator();
198    }
199
200    public event EventHandler<ItemIndexEventArgs> ItemAdded;
201    protected virtual void OnItemAdded(IItem item, int index) {
202      if (ItemAdded != null)
203        ItemAdded(this, new ItemIndexEventArgs(item, index));
204      OnChanged();
205    }
206    public event EventHandler<ItemIndexEventArgs> ItemRemoved;
207    protected virtual void OnItemRemoved(IItem item, int index) {
208      if (ItemRemoved != null)
209        ItemRemoved(this, new ItemIndexEventArgs(item, index));
210      OnChanged();
211    }
212    public event EventHandler Cleared;
213    protected virtual void OnCleared() {
214      if (Cleared != null)
215        Cleared(this, new EventArgs());
216      OnChanged();
217    }
218  }
219}
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