/**
 * Orthanc - A Lightweight, RESTful DICOM Store
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 *
 * This program 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.
 *
 * In addition, as a special exception, the copyright holders of this
 * program give permission to link the code of its release with the
 * OpenSSL project's "OpenSSL" library (or with modified versions of it
 * that use the same license as the "OpenSSL" library), and distribute
 * the linked executables. You must obey the GNU General Public License
 * in all respects for all of the code used other than "OpenSSL". If you
 * modify file(s) with this exception, you may extend this exception to
 * your version of the file(s), but you are not obligated to do so. If
 * you do not wish to do so, delete this exception statement from your
 * version. If you delete this exception statement from all source files
 * in the program, then also delete it here.
 * 
 * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
 **/


#pragma once

#include <boost/thread.hpp>

#include "../Orthanc/Core/IDynamicObject.h"

namespace OrthancClient
{
  class ArrayFilledByThreads
  {
  public:
    class IFiller
    {
    public:
      virtual size_t GetFillerSize() = 0;

      virtual Orthanc::IDynamicObject* GetFillerItem(size_t index) = 0;
    };

  private:
    IFiller& filler_;
    boost::mutex  mutex_;
    std::vector<Orthanc::IDynamicObject*>  array_;
    bool filled_;
    unsigned int threadCount_;

    class Command;

    void Clear();

    void Update();

  public:
    ArrayFilledByThreads(IFiller& filler);

    ~ArrayFilledByThreads();
  
    void Reload();

    void Invalidate();

    void SetThreadCount(unsigned int t);

    unsigned int GetThreadCount() const
    {
      return threadCount_;
    }

    size_t GetSize();

    Orthanc::IDynamicObject& GetItem(size_t index);
  };
}