source: trunk/sources/HeuristicLab.GP.StructureIdentification/3.3/FunctionLibraryInjectors/ArithmeticFunctionLibraryInjector.cs @ 3155

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2008 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System.Collections.Generic;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.GP.Interfaces;
using HeuristicLab.GP;

namespace HeuristicLab.GP.StructureIdentification {
  [SymbolicRegressionFunctionLibraryInjector]
  public class ArithmeticFunctionLibraryInjector : FunctionLibraryInjectorBase {
    public override string Description {
      get { return @"Injects a function library with (+, -, *,  /) symbols."; }
    }

    protected override FunctionLibrary CreateFunctionLibrary() {
      FunctionLibrary functionLibrary = new FunctionLibrary();

      Variable variable = new Variable();
      Constant constant = new Constant();
      Differential differential = new Differential();
      Addition addition = new Addition();
      Division division = new Division();
      Multiplication multiplication = new Multiplication();
      Subtraction subtraction = new Subtraction();

      List<IFunction> doubleFunctions = new List<IFunction>() {
      differential, variable, constant, addition, division, multiplication, subtraction
      };

      SetAllowedSubOperators(addition, doubleFunctions);
      SetAllowedSubOperators(division, doubleFunctions);
      SetAllowedSubOperators(multiplication, doubleFunctions);
      SetAllowedSubOperators(subtraction, doubleFunctions);

      doubleFunctions.ForEach(fun => functionLibrary.AddFunction(fun));

      return functionLibrary;
    }
  }
}