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source: trunk/sources/HeuristicLab.Optimization/3.3/Algorithms/Algorithm.cs @ 11171

Last change on this file since 11171 was 11171, checked in by ascheibe, 9 years ago

#2115 merged r11170 (copyright update) into trunk

File size: 13.4 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2014 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.Drawing;
25using System.Linq;
26using HeuristicLab.Collections;
27using HeuristicLab.Common;
28using HeuristicLab.Core;
29using HeuristicLab.Data;
30using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
31
32namespace HeuristicLab.Optimization {
33  /// <summary>
34  /// A base class for algorithms.
35  /// </summary>
36  [Item("Algorithm", "A base class for algorithms.")]
37  [StorableClass]
38  public abstract class Algorithm : ParameterizedNamedItem, IAlgorithm {
39    public static new Image StaticItemImage {
40      get { return HeuristicLab.Common.Resources.VSImageLibrary.Event; }
41    }
42    public override Image ItemImage {
43      get {
44        if (ExecutionState == ExecutionState.Prepared) return HeuristicLab.Common.Resources.VSImageLibrary.ExecutablePrepared;
45        else if (ExecutionState == ExecutionState.Started) return HeuristicLab.Common.Resources.VSImageLibrary.ExecutableStarted;
46        else if (ExecutionState == ExecutionState.Paused) return HeuristicLab.Common.Resources.VSImageLibrary.ExecutablePaused;
47        else if (ExecutionState == ExecutionState.Stopped) return HeuristicLab.Common.Resources.VSImageLibrary.ExecutableStopped;
48        else return base.ItemImage;
49      }
50    }
51
52    [Storable]
53    private ExecutionState executionState;
54    public ExecutionState ExecutionState {
55      get { return executionState; }
56      private set {
57        if (executionState != value) {
58          executionState = value;
59          OnExecutionStateChanged();
60          OnItemImageChanged();
61        }
62      }
63    }
64
65    [Storable]
66    private TimeSpan executionTime;
67    public TimeSpan ExecutionTime {
68      get { return executionTime; }
69      protected set {
70        executionTime = value;
71        OnExecutionTimeChanged();
72      }
73    }
74
75    public virtual Type ProblemType {
76      get { return typeof(IProblem); }
77    }
78
79    [Storable]
80    private IProblem problem;
81    public IProblem Problem {
82      get { return problem; }
83      set {
84        if (problem != value) {
85          if ((value != null) && !ProblemType.IsInstanceOfType(value)) throw new ArgumentException("Invalid problem type.");
86          if (problem != null) DeregisterProblemEvents();
87          problem = value;
88          if (problem != null) RegisterProblemEvents();
89          OnProblemChanged();
90          Prepare();
91        }
92      }
93    }
94
95    public abstract ResultCollection Results { get; }
96
97    [Storable]
98    private bool storeAlgorithmInEachRun;
99    public bool StoreAlgorithmInEachRun {
100      get { return storeAlgorithmInEachRun; }
101      set {
102        if (storeAlgorithmInEachRun != value) {
103          storeAlgorithmInEachRun = value;
104          OnStoreAlgorithmInEachRunChanged();
105        }
106      }
107    }
108
109    [Storable]
110    protected int runsCounter;
111
112    [Storable]
113    private RunCollection runs;
114    public RunCollection Runs {
115      get { return runs; }
116      protected set {
117        if (value == null) throw new ArgumentNullException();
118        if (runs != value) {
119          if (runs != null) DeregisterRunsEvents();
120          runs = value;
121          if (runs != null) RegisterRunsEvents();
122        }
123      }
124    }
125
126    public virtual IEnumerable<IOptimizer> NestedOptimizers {
127      get { return Enumerable.Empty<IOptimizer>(); }
128    }
129
130    protected Algorithm()
131      : base() {
132      executionState = ExecutionState.Stopped;
133      executionTime = TimeSpan.Zero;
134      storeAlgorithmInEachRun = false;
135      runsCounter = 0;
136      Runs = new RunCollection { OptimizerName = Name };
137    }
138    protected Algorithm(string name)
139      : base(name) {
140      executionState = ExecutionState.Stopped;
141      executionTime = TimeSpan.Zero;
142      storeAlgorithmInEachRun = false;
143      runsCounter = 0;
144      Runs = new RunCollection { OptimizerName = Name };
145    }
146    protected Algorithm(string name, ParameterCollection parameters)
147      : base(name, parameters) {
148      executionState = ExecutionState.Stopped;
149      executionTime = TimeSpan.Zero;
150      storeAlgorithmInEachRun = false;
151      runsCounter = 0;
152      Runs = new RunCollection { OptimizerName = Name };
153    }
154    protected Algorithm(string name, string description)
155      : base(name, description) {
156      executionState = ExecutionState.Stopped;
157      executionTime = TimeSpan.Zero;
158      storeAlgorithmInEachRun = false;
159      runsCounter = 0;
160      Runs = new RunCollection { OptimizerName = Name };
161    }
162    protected Algorithm(string name, string description, ParameterCollection parameters)
163      : base(name, description, parameters) {
164      executionState = ExecutionState.Stopped;
165      executionTime = TimeSpan.Zero;
166      storeAlgorithmInEachRun = false;
167      runsCounter = 0;
168      Runs = new RunCollection { OptimizerName = Name };
169    }
170    [StorableConstructor]
171    protected Algorithm(bool deserializing) : base(deserializing) { }
172    [StorableHook(HookType.AfterDeserialization)]
173    private void AfterDeserialization() {
174      Initialize();
175    }
176
177    protected Algorithm(Algorithm original, Cloner cloner)
178      : base(original, cloner) {
179      if (ExecutionState == ExecutionState.Started) throw new InvalidOperationException(string.Format("Clone not allowed in execution state \"{0}\".", ExecutionState));
180      executionState = original.executionState;
181      executionTime = original.executionTime;
182      problem = cloner.Clone(original.problem);
183      storeAlgorithmInEachRun = original.storeAlgorithmInEachRun;
184      runsCounter = original.runsCounter;
185      runs = cloner.Clone(original.runs);
186      Initialize();
187    }
188
189    private void Initialize() {
190      if (problem != null) RegisterProblemEvents();
191      if (runs != null) RegisterRunsEvents();
192    }
193
194    public virtual void Prepare() {
195      if ((ExecutionState != ExecutionState.Prepared) && (ExecutionState != ExecutionState.Paused) && (ExecutionState != ExecutionState.Stopped))
196        throw new InvalidOperationException(string.Format("Prepare not allowed in execution state \"{0}\".", ExecutionState));
197    }
198    public void Prepare(bool clearRuns) {
199      if ((ExecutionState != ExecutionState.Prepared) && (ExecutionState != ExecutionState.Paused) && (ExecutionState != ExecutionState.Stopped))
200        throw new InvalidOperationException(string.Format("Prepare not allowed in execution state \"{0}\".", ExecutionState));
201      if (clearRuns) runs.Clear();
202      Prepare();
203    }
204    public virtual void Start() {
205      if ((ExecutionState != ExecutionState.Prepared) && (ExecutionState != ExecutionState.Paused))
206        throw new InvalidOperationException(string.Format("Start not allowed in execution state \"{0}\".", ExecutionState));
207    }
208    public virtual void Pause() {
209      if (ExecutionState != ExecutionState.Started)
210        throw new InvalidOperationException(string.Format("Pause not allowed in execution state \"{0}\".", ExecutionState));
211    }
212    public virtual void Stop() {
213      if ((ExecutionState != ExecutionState.Started) && (ExecutionState != ExecutionState.Paused))
214        throw new InvalidOperationException(string.Format("Stop not allowed in execution state \"{0}\".", ExecutionState));
215    }
216
217    public override void CollectParameterValues(IDictionary<string, IItem> values) {
218      base.CollectParameterValues(values);
219      values.Add("Algorithm Name", new StringValue(Name));
220      values.Add("Algorithm Type", new StringValue(this.GetType().GetPrettyName()));
221      if (Problem != null) {
222        Problem.CollectParameterValues(values);
223        values.Add("Problem Name", new StringValue(Problem.Name));
224        values.Add("Problem Type", new StringValue(Problem.GetType().GetPrettyName()));
225      }
226    }
227    public virtual void CollectResultValues(IDictionary<string, IItem> values) {
228      values.Add("Execution Time", new TimeSpanValue(ExecutionTime));
229      CollectResultsRecursively("", Results, values);
230    }
231
232    private void CollectResultsRecursively(string path, ResultCollection results, IDictionary<string, IItem> values) {
233      foreach (IResult result in results) {
234        values.Add(path + result.Name, result.Value);
235        ResultCollection childCollection = result.Value as ResultCollection;
236        if (childCollection != null) {
237          CollectResultsRecursively(path + result.Name + ".", childCollection, values);
238        }
239      }
240    }
241
242    protected override IEnumerable<KeyValuePair<string, IItem>> GetCollectedValues(IValueParameter param) {
243      var children = base.GetCollectedValues(param);
244      foreach (var child in children) {
245        if (child.Value is IOperator)
246          yield return new KeyValuePair<string, IItem>(child.Key, new StringValue(((IOperator)child.Value).Name));
247        else yield return child;
248      }
249    }
250
251    #region Events
252    protected override void OnNameChanged() {
253      base.OnNameChanged();
254      Runs.OptimizerName = Name;
255    }
256
257    public event EventHandler ExecutionStateChanged;
258    protected virtual void OnExecutionStateChanged() {
259      EventHandler handler = ExecutionStateChanged;
260      if (handler != null) handler(this, EventArgs.Empty);
261    }
262    public event EventHandler ExecutionTimeChanged;
263    protected virtual void OnExecutionTimeChanged() {
264      EventHandler handler = ExecutionTimeChanged;
265      if (handler != null) handler(this, EventArgs.Empty);
266    }
267    public event EventHandler ProblemChanged;
268    protected virtual void OnProblemChanged() {
269      EventHandler handler = ProblemChanged;
270      if (handler != null) handler(this, EventArgs.Empty);
271    }
272    public event EventHandler StoreAlgorithmInEachRunChanged;
273    protected virtual void OnStoreAlgorithmInEachRunChanged() {
274      EventHandler handler = StoreAlgorithmInEachRunChanged;
275      if (handler != null) handler(this, EventArgs.Empty);
276    }
277    public event EventHandler Prepared;
278    protected virtual void OnPrepared() {
279      ExecutionTime = TimeSpan.Zero;
280      foreach (IStatefulItem statefulObject in this.GetObjectGraphObjects(new HashSet<object>() { Runs }).OfType<IStatefulItem>()) {
281        statefulObject.InitializeState();
282      }
283      ExecutionState = ExecutionState.Prepared;
284      EventHandler handler = Prepared;
285      if (handler != null) handler(this, EventArgs.Empty);
286    }
287    public event EventHandler Started;
288    protected virtual void OnStarted() {
289      ExecutionState = ExecutionState.Started;
290      EventHandler handler = Started;
291      if (handler != null) handler(this, EventArgs.Empty);
292    }
293    public event EventHandler Paused;
294    protected virtual void OnPaused() {
295      ExecutionState = ExecutionState.Paused;
296      EventHandler handler = Paused;
297      if (handler != null) handler(this, EventArgs.Empty);
298    }
299    public event EventHandler Stopped;
300    protected virtual void OnStopped() {
301      foreach (IStatefulItem statefulObject in this.GetObjectGraphObjects(new HashSet<object>() { Runs }).OfType<IStatefulItem>()) {
302        statefulObject.ClearState();
303      }
304      runsCounter++;
305      runs.Add(new Run(string.Format("{0} Run {1}", Name, runsCounter), this));
306      ExecutionState = ExecutionState.Stopped;
307      EventHandler handler = Stopped;
308      if (handler != null) handler(this, EventArgs.Empty);
309    }
310    public event EventHandler<EventArgs<Exception>> ExceptionOccurred;
311    protected virtual void OnExceptionOccurred(Exception exception) {
312      EventHandler<EventArgs<Exception>> handler = ExceptionOccurred;
313      if (handler != null) handler(this, new EventArgs<Exception>(exception));
314    }
315
316    protected virtual void DeregisterProblemEvents() {
317      problem.OperatorsChanged -= new EventHandler(Problem_OperatorsChanged);
318      problem.Reset -= new EventHandler(Problem_Reset);
319    }
320    protected virtual void RegisterProblemEvents() {
321      problem.OperatorsChanged += new EventHandler(Problem_OperatorsChanged);
322      problem.Reset += new EventHandler(Problem_Reset);
323    }
324    protected virtual void Problem_OperatorsChanged(object sender, EventArgs e) { }
325    protected virtual void Problem_Reset(object sender, EventArgs e) {
326      Prepare();
327    }
328
329    protected virtual void DeregisterRunsEvents() {
330      runs.CollectionReset -= new CollectionItemsChangedEventHandler<IRun>(Runs_CollectionReset);
331    }
332    protected virtual void RegisterRunsEvents() {
333      runs.CollectionReset += new CollectionItemsChangedEventHandler<IRun>(Runs_CollectionReset);
334    }
335    protected virtual void Runs_CollectionReset(object sender, CollectionItemsChangedEventArgs<IRun> e) {
336      runsCounter = runs.Count;
337    }
338    #endregion
339  }
340}
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