1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2019 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System.Collections.Generic;
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23 | using System.Linq;
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24 | using HeuristicLab.Collections;
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25 | using HeuristicLab.Common;
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26 | using HEAL.Attic;
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27 |
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28 | namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding {
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29 | [StorableType("B9D90B52-04E2-4B18-A293-160061DAD57F")]
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30 | public sealed class GroupSymbol : Symbol {
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31 | private const int minimumArity = 0;
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32 | private const int maximumArity = 0;
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33 |
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34 | public override int MinimumArity {
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35 | get { return minimumArity; }
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36 | }
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37 | public override int MaximumArity {
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38 | get { return maximumArity; }
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39 | }
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40 |
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41 | private ObservableSet<ISymbol> symbols;
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42 | public IObservableSet<ISymbol> SymbolsCollection {
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43 | get { return symbols; }
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44 | }
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45 | [Storable]
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46 | public IEnumerable<ISymbol> Symbols {
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47 | get { return symbols; }
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48 | private set { symbols = new ObservableSet<ISymbol>(value); }
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49 | }
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50 |
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51 | [StorableConstructor]
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52 | private GroupSymbol(StorableConstructorFlag _) : base(_) { }
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53 | private GroupSymbol(GroupSymbol original, Cloner cloner)
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54 | : base(original, cloner) {
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55 | symbols = new ObservableSet<ISymbol>(original.Symbols.Select(s => cloner.Clone(s)));
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56 | }
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57 | public override IDeepCloneable Clone(Cloner cloner) {
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58 | return new GroupSymbol(this, cloner);
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59 | }
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60 |
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61 | public GroupSymbol() : this("Group Symbol", Enumerable.Empty<ISymbol>()) { }
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62 | public GroupSymbol(string name, IEnumerable<ISymbol> symbols)
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63 | : base(name, "A symbol which groups other symbols") {
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64 | this.symbols = new ObservableSet<ISymbol>(symbols);
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65 | InitialFrequency = 0.0;
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66 | }
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67 |
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68 | public override IEnumerable<ISymbol> Flatten() {
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69 | return base.Flatten().Union(symbols.SelectMany(s => s.Flatten()));
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70 | }
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71 | }
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72 | }
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