#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;
using System.Collections.Generic;
using System.Text;

namespace HeuristicLab.Core {
  public interface IEngine : IItem {
    IOperatorGraph OperatorGraph { get; }
    IScope GlobalScope { get; }

    TimeSpan ExecutionTime { get; }

    bool Running { get; }
    bool Canceled { get; }
    bool Terminated { get; }

    void Execute();
    void ExecuteStep();
    void ExecuteSteps(int steps);
    void Abort();
    void Reset();

    event EventHandler Initialized;
    event EventHandler<OperationEventArgs> OperationExecuted;
    event EventHandler<ExceptionEventArgs> ExceptionOccurred;
    event EventHandler ExecutionTimeChanged;
    event EventHandler Finished;
  }
}