/*
 * FragmentJob.hpp
 *
 * Originally taken from my JobMarket project at 1.1.4.
 *
 *  Created on: Oct 19, 2011
 *      Author: heber
 */

#ifndef FRAGMENTJOB_HPP_
#define FRAGMENTJOB_HPP_

// include config.h
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string>

#include "boost/shared_ptr.hpp"
#include "boost/serialization/access.hpp"
#include "boost/serialization/shared_ptr.hpp"

#ifdef HAVE_JOBMARKET
#include "JobMarket/Results/FragmentResult.hpp"
#include "JobMarket/JobId.hpp"
#include "JobMarket/types.hpp"
#else
#include "Jobs//JobMarket/FragmentResult.hpp"
#include "Jobs//JobMarket/JobId.hpp"
#include "Jobs//JobMarket/types.hpp"
#endif

class MPQCCommandFragmentController;

/** FragmentJob contains all information for the Worker to start the job and
 * deliver a FragmentResult.
 *
 * Important is that this class is fully serializable such that it can be
 * transfered to a scheduler (server) and be deserialized by the Worker.
 */
class FragmentJob : public JobId
{
  //!> allow MPQCCommandFragmentController access to setJobId()
  friend class MPQCCommandFragmentController;

public:
  //!> typedef for priorities of a job
  typedef size_t priority_t;

private:
  //!> Internal priority of the job
  priority_t priority;

public:
  typedef boost::shared_ptr<FragmentJob> ptr;

  FragmentJob(const JobId_t _JobId);
  virtual ~FragmentJob();

  virtual FragmentResult::ptr Work() = 0;

  bool operator==(const FragmentJob &other) const;

  bool operator!=(const FragmentJob &other) const {
    return !(*this == other);
  }

  /** Less-than-operator required for priority queue.
   *
   * \param other other instance to compare to
   * \return true - this instance is less than other (in priority)
   */
  bool operator<(const FragmentJob &other) const {
    return priority < other.priority;
  }

  /** Setter for the job's priority.
   *
   * \param _priority priority to set
   */
  void setPriority(const priority_t _priority) {
    priority = _priority;
  }

protected:
  /** Passing JobId::setId() on to grant FragmentController' access.
   *
   * \param _id new id to set
   */
  void setId(const JobId_t _id) { JobId::setId(_id); }

private:
  /** private default cstor for serialization only
   *
   * Use normal cstor with JobId::IllegalJob if you want to instantiate
   * a job without id.
   */
  FragmentJob();

  friend class boost::serialization::access;
  // serialization
  template <typename Archive>
  void serialize(Archive& ar, const unsigned int version)
  {
    ar & boost::serialization::base_object<JobId>(*this);
    ar & priority;
  }
};

/** Helper function for allow less on ptr's of FragmentJob.
 *
 * \param a first instance
 * \param b second instance
 * \return \see FragmentJob::operator<()
 */
inline
bool operator<(const FragmentJob::ptr &a, const FragmentJob::ptr &b)
{ return (*a) < (*b); }


#endif /* FRAGMENTJOB_HPP_ */