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source: branches/GP.Grammar.Editor/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/SymbolicExpressionTreeGrammar.cs @ 6847

Last change on this file since 6847 was 6409, checked in by mkommend, 13 years ago

#1479: Updated grammar editor and changed related classes.

File size: 5.7 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2011 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 HeuristicLab.Common;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27
28namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding {
29  [StorableClass]
30  internal sealed class SymbolicExpressionTreeGrammar : SymbolicExpressionGrammarBase, ISymbolicExpressionTreeGrammar {
31    [StorableConstructor]
32    private SymbolicExpressionTreeGrammar(bool deserializing) : base(deserializing) { }
33    private SymbolicExpressionTreeGrammar(SymbolicExpressionTreeGrammar original, Cloner cloner)
34      : base(original, cloner) {
35      this.grammar = original.grammar;
36    }
37    public override IDeepCloneable Clone(Cloner cloner) {
38      foreach (ISymbol symbol in base.Symbols)
39        if (!cloner.ClonedObjectRegistered(symbol))
40          cloner.RegisterClonedObject(symbol, symbol);
41      return new SymbolicExpressionTreeGrammar(this, cloner);
42    }
43
44    [Storable]
45    private ISymbolicExpressionGrammar grammar;
46    public SymbolicExpressionTreeGrammar(ISymbolicExpressionGrammar grammar)
47      : base("SymbolicExpressionTreeGrammar", "A grammar that is used held by symbolic expression trees and allows extensions to the wraped grammar.") {
48      if (grammar == null) throw new ArgumentNullException();
49      this.grammar = grammar;
50    }
51
52    public override IEnumerable<ISymbol> Symbols {
53      get { return grammar.Symbols.Union(base.Symbols); }
54    }
55    public override IEnumerable<ISymbol> AllowedSymbols {
56      get { return base.AllowedSymbols; }
57    }
58    public IEnumerable<ISymbol> ModifyableSymbols {
59      get { return base.symbols.Values; }
60    }
61    public bool IsModifyableSymbol(ISymbol symbol) {
62      return base.symbols.ContainsKey(symbol.Name);
63    }
64
65    public override bool ContainsSymbol(ISymbol symbol) {
66      return grammar.ContainsSymbol(symbol) || base.ContainsSymbol(symbol);
67    }
68    public override ISymbol GetSymbol(string symbolName) {
69      var symbol = grammar.GetSymbol(symbolName);
70      if (symbol != null) return symbol;
71      symbol = base.GetSymbol(symbolName);
72      if (symbol != null) return symbol;
73      throw new ArgumentException();
74    }
75
76    public override bool IsAllowedChildSymbol(ISymbol parent, ISymbol child) {
77      return grammar.IsAllowedChildSymbol(parent, child) || base.IsAllowedChildSymbol(parent, child);
78    }
79    public override bool IsAllowedChildSymbol(ISymbol parent, ISymbol child, int argumentIndex) {
80      return grammar.IsAllowedChildSymbol(parent, child, argumentIndex) || base.IsAllowedChildSymbol(parent, child, argumentIndex);
81    }
82    public override IEnumerable<ISymbol> GetAllowedChildSymbols(ISymbol parent) {
83      var symbols = grammar.GetAllowedChildSymbols(parent).Union(base.GetAllowedChildSymbols(parent));
84      return symbols.SelectMany(s => s.Flatten()).Where(s => s.Enabled && !(s is GroupSymbol));
85    }
86    public override IEnumerable<ISymbol> GetAllowedChildSymbols(ISymbol parent, int argumentIndex) {
87      var symbols = grammar.GetAllowedChildSymbols(parent, argumentIndex).Union(base.GetAllowedChildSymbols(parent, argumentIndex));
88      return symbols.SelectMany(s => s.Flatten()).Where(s => s.Enabled && !(s is GroupSymbol));
89    }
90
91    public override int GetMinimumSubtreeCount(ISymbol symbol) {
92      if (grammar.ContainsSymbol(symbol)) return grammar.GetMinimumSubtreeCount(symbol);
93      return base.GetMinimumSubtreeCount(symbol);
94    }
95    public override int GetMaximumSubtreeCount(ISymbol symbol) {
96      if (grammar.ContainsSymbol(symbol)) return grammar.GetMaximumSubtreeCount(symbol);
97      return base.GetMaximumSubtreeCount(symbol);
98    }
99
100    void ISymbolicExpressionTreeGrammar.AddSymbol(ISymbol symbol) {
101      base.AddSymbol(symbol);
102    }
103    void ISymbolicExpressionTreeGrammar.RemoveSymbol(ISymbol symbol) {
104      if (!IsModifyableSymbol(symbol)) throw new InvalidOperationException();
105      base.RemoveSymbol(symbol);
106    }
107    void ISymbolicExpressionTreeGrammar.AddAllowedChildSymbol(ISymbol parent, ISymbol child) {
108      base.AddAllowedChildSymbol(parent, child);
109    }
110    void ISymbolicExpressionTreeGrammar.AddAllowedChildSymbol(ISymbol parent, ISymbol child, int argumentIndex) {
111      base.AddAllowedChildSymbol(parent, child, argumentIndex);
112    }
113    void ISymbolicExpressionTreeGrammar.RemoveAllowedChildSymbol(ISymbol parent, ISymbol child) {
114      base.RemoveAllowedChildSymbol(parent, child);
115    }
116    void ISymbolicExpressionTreeGrammar.RemoveAllowedChildSymbol(ISymbol parent, ISymbol child, int argumentIndex) {
117      base.RemoveAllowedChildSymbol(parent, child, argumentIndex);
118    }
119
120    void ISymbolicExpressionTreeGrammar.SetSubtreeCount(ISymbol symbol, int minimumSubtreeCount, int maximumSubtreeCount) {
121      if (!IsModifyableSymbol(symbol)) throw new InvalidOperationException();
122      base.SetSubtreeCount(symbol, minimumSubtreeCount, maximumSubtreeCount);
123    }
124  }
125}
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