#region License Information /* HeuristicLab * Copyright (C) 2002-2016 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 . */ #endregion using System.Collections.Generic; using HeuristicLab.Common; using HeuristicLab.Core; using HeuristicLab.Data; using HeuristicLab.Operators; using HeuristicLab.Parameters; using HeuristicLab.Persistence; namespace HeuristicLab.Optimization.Operators { /// /// An operator that evaluates an expression. /// [Item("ExpressionCalculator", "An operator that evaluates an expression.")] [StorableType("895020f4-0c77-4763-bfa9-f9ed0fca4c7b")] public class ExpressionCalculator : ValuesCollector { [Storable] public Calculator Calculator { get; set; } #region Parameter Properties public IValueLookupParameter ExpressionParameter { get { return (IValueLookupParameter)Parameters["Expression"]; } } public IValueLookupParameter ExpressionResultParameter { get { return (IValueLookupParameter)Parameters["ExpressionResult"]; } } #endregion #region Properties private string Formula { get { return ExpressionParameter.Value.Value; } } private IItem ExpressionResult { set { ExpressionResultParameter.ActualValue = value; } } #endregion [StorableConstructor] protected ExpressionCalculator(StorableConstructorFlag deserializing) : base(deserializing) { } protected ExpressionCalculator(ExpressionCalculator original, Cloner cloner) : base(original, cloner) { this.Calculator = cloner.Clone(original.Calculator); } public ExpressionCalculator() : base() { Parameters.Add(new ValueLookupParameter("ExpressionResult", "The result of the evaluated expression.")); Parameters.Add(new ValueLookupParameter("Expression", @"RPN formula for new value in postfix notation. This can contain the following elements: literals: numbers, true, false, null and strings in single quotes variables (run parameters or results): unquoted or in double quotes if they contain special characters or whitespace mathematical functions (resulting in double values): +, -, *, /, ^ (power), log predicates: ==, <, >, isnull, not conversions: toint, todouble array indexing: [] stack manipulation: drop swap dup string matching: ismatch string replacing: rename conditionals: if If the final value is null, the result variable is removed if it exists.")); Calculator = new Calculator(); } public override IDeepCloneable Clone(Cloner cloner) { return new ExpressionCalculator(this, cloner); } public override IOperation Apply() { Calculator.Formula = Formula; var variables = new Dictionary(); foreach (var collectedValue in CollectedValues) variables[collectedValue.Name] = collectedValue.ActualValue; ExpressionResult = Calculator.GetValue(variables); return base.Apply(); } } }