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source: trunk/sources/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.3/SymbolicExpressionTreeStringFormatter.cs @ 4068

Last change on this file since 4068 was 4068, checked in by swagner, 14 years ago

Sorted usings and removed unused usings in entire solution (#1094)

File size: 2.3 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 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.Text;
23using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
24
25namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding {
26  [StorableClass]
27  public class SymbolicExpressionTreeStringFormatter {
28    [Storable]
29    public bool Indent { get; set; }
30
31    public SymbolicExpressionTreeStringFormatter()
32      : base() {
33      Indent = true;
34    }
35
36    public string Format(SymbolicExpressionTree symbolicExpressionTree) {
37      return FormatRecursively(symbolicExpressionTree.Root, 0);
38    }
39
40    private string FormatRecursively(SymbolicExpressionTreeNode node, int indentLength) {
41      StringBuilder strBuilder = new StringBuilder();
42      if (Indent) strBuilder.Append(' ', indentLength);
43      strBuilder.Append("(");
44      // internal nodes or leaf nodes?
45      if (node.SubTrees.Count > 0) {
46        // symbol on same line as '('
47        strBuilder.AppendLine(node.ToString());
48        // each subtree expression on a new line
49        // and closing ')' also on new line
50        foreach (var subtree in node.SubTrees) {
51          strBuilder.AppendLine(FormatRecursively(subtree, indentLength + 2));
52        }
53        if (Indent) strBuilder.Append(' ', indentLength);
54        strBuilder.Append(")");
55      } else {
56        // symbol in the same line with as '(' and ')'
57        strBuilder.Append(node.ToString());
58        strBuilder.Append(")");
59      }
60      return strBuilder.ToString();
61    }
62  }
63}
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