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source: trunk/sources/HeuristicLab.Constraints/ItemTypeConstraint.cs @ 40

Last change on this file since 40 was 40, checked in by swagner, 16 years ago

Worked on ticket #41

  • added generic ItemList<T>
File size: 3.1 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.Generic;
24using System.Text;
25using System.Xml;
26using HeuristicLab.Core;
27using HeuristicLab.Data;
28
29namespace HeuristicLab.Constraints {
30  public class ItemTypeConstraint : ConstraintBase {
31    private Type type;
32    public Type Type {
33      get { return type; }
34      set {
35        type = value;
36        OnChanged();
37      }
38    }
39
40    public override string Description {
41      get {
42        return @"The ItemTypeConstraint limits the type of a given item.
43If the item is a ConstrainedItemList, any containing elements are limited to the type and not the ConstrainedItemList itself.";
44      }
45    }
46
47    public ItemTypeConstraint() {
48      type = typeof(ItemBase);
49    }
50
51    public ItemTypeConstraint(Type type) {
52      this.type = type;
53    }
54
55    public override bool Check(IItem data) {
56      ConstrainedItemList list = (data as ConstrainedItemList);
57      if (list != null) {
58        for (int i = 0; i < list.Count; i++)
59          if (!list[i].GetType().Equals(type)) return false;
60        return true;
61      }
62      return data.GetType().Equals(type);
63    }
64
65    public override IView CreateView() {
66      return new ItemTypeConstraintView(this);
67    }
68
69    public override void Accept(IConstraintVisitor visitor) {
70      visitor.Visit(this);
71    }
72
73    #region clone & persistence
74    public override object Clone(IDictionary<Guid, object> clonedObjects) {
75      ItemTypeConstraint clone = new ItemTypeConstraint(type);
76      clonedObjects.Add(Guid, clone);
77      return clone;
78    }
79
80    public override XmlNode GetXmlNode(string name, XmlDocument document, IDictionary<Guid, IStorable> persistedObjects) {
81      XmlNode node = base.GetXmlNode(name, document, persistedObjects);
82      XmlAttribute itemTypeAttribute = document.CreateAttribute("ItemType");
83      itemTypeAttribute.Value = PersistenceManager.BuildTypeString(Type);
84      node.Attributes.Append(itemTypeAttribute);
85      return node;
86    }
87
88    public override void Populate(XmlNode node, IDictionary<Guid, IStorable> restoredObjects) {
89      base.Populate(node, restoredObjects);
90      XmlAttribute itemTypeAttribute = node.Attributes["ItemType"];
91      type = Type.GetType(itemTypeAttribute.Value);
92    }
93    #endregion
94  }
95}
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