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source: branches/CEDMA-Refactoring-Ticket419/HeuristicLab.CEDMA.Core/DataSet.cs @ 1116

Last change on this file since 1116 was 1116, checked in by gkronber, 15 years ago

worked on CEDMA DB-backend. Select() interface to RDF_Store is not powerful enough => need Query() interface. #419
(work in progress - doesn't build!)

File size: 3.2 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.Linq;
25using System.Text;
26using HeuristicLab.Core;
27using System.Xml;
28using HeuristicLab.CEDMA.DB.Interfaces;
29using HeuristicLab.Operators;
30
31namespace HeuristicLab.CEDMA.Core {
32  public class DataSet : IViewable {
33    public IStore Store { get; set; }
34
35    private Guid guid;
36    public Guid Guid {
37      get { return guid; }
38    }
39
40    private string name;
41    public string Name {
42      get { return name; }
43    }
44
45    private Problem problem;
46    public Problem Problem {
47      get {
48        // lazy loading of problem from DB
49        if (problem == null) {
50          var persistedData = Store.Select(new Statement(new Entity(Ontology.CedmaNameSpace + Guid), Ontology.PredicateSerializedData, Ontology.AnyEntity));
51          if (persistedData.Count() == 1) {
52            Literal persistedLiteral = (Literal)persistedData.First().Property;
53            this.problem = (Problem)PersistenceManager.RestoreFromGZip(Convert.FromBase64String((string)persistedLiteral.Value));
54          } else
55            this.problem = new Problem(); // no entry in the DB => create a new problem
56        }
57        return problem;
58      }
59    }
60
61    public DataSet()
62      : base() {
63      guid = Guid.NewGuid();
64      name = "Data set";
65    }
66
67    public DataSet(IStore store, Entity dataSetEntity)
68      : this() {
69      Store = store;
70      guid = new Guid(dataSetEntity.Uri.Remove(0, Ontology.CedmaNameSpace.Length));
71      var names = store.Select(new Statement(dataSetEntity, Ontology.PredicateName, Ontology.AnyEntity));
72      if (names.Count() > 0) name = (string)((Literal)names.First().Property).Value;
73      else name = guid.ToString();
74    }
75
76    public void Activate() {
77      Entity myEntity = new Entity(Ontology.CedmaNameSpace + Guid);
78      Store.Add(new Statement(myEntity, Ontology.PredicateInstanceOf, Ontology.TypeDataSet));
79      Store.Add(new Statement(myEntity, Ontology.PredicateSerializedData, new Literal(Convert.ToBase64String(PersistenceManager.SaveToGZip(problem)))));
80      Store.Add(new Statement(myEntity, Ontology.PredicateName, new Literal(name)));
81    }
82
83    public IView CreateView() {
84      return new DataSetView(this);
85    }
86
87    internal Results GetResults() {
88      Results results = new Results(Store);
89      results.FilterDataSet(new Entity(Ontology.CedmaNameSpace + Guid));
90      return results;
91    }
92  }
93}
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