//
// Copyright (c) 2009 Froduald Kabanza and the Université de Sherbrooke.
// Use of this software is permitted for non-commercial research purposes, and
// it may be copied or applied only for that use. All copies must include this
// copyright message.
// 
// This is a research prototype that has not gone through intensive tests and
// is delivered as is. It may still contain bugs. Froduald Kabanza and the
// Université de Sherbrooke disclaim any responsibility for damage that may be
// caused by using it.
//
// Please note that some files were inspired in part by the PDDL4J library:
// http://www.math-info.univ-paris5.fr/~pellier/software/software.php 
//
// Implementation: Simon Chamberland
// Project Manager: Froduald Kabanza
//

#ifndef _OBJECT_EQUAL_COMP_EXP_H
#define _OBJECT_EQUAL_COMP_EXP_H

#include "ComparisonExp.h"
#include "../ITerm.h"

namespace planning
{
  class ObjectEqualCompExp : public ComparisonExp<ITerm, std::equal_to<const Object*>>
  {
  public:
    ObjectEqualCompExp(const ITerm *arg1, const ITerm *arg2)
      : ComparisonExp(s_op, arg1, arg2)
    {
      INITIALIZE_HASH_CODE();
    }

  protected:
    virtual size_t _calculateHashCode() const
    {
      return CALCULATE_HASH_CODE(ComparisonExp)
           + 3043478;
    }

    virtual const IExp* _internalApply(const Bindings* bindings) const;

  private:
    static std::string s_op;
  };
}

#endif