#ifndef __JDETECTOR__JMODULECOMPARATOR__
#define __JDETECTOR__JMODULECOMPARATOR__

#include "JLang/JComparator.hh"
#include "JDetector/JModule.hh"


/**
 * \file
 *
 * Auxiliary classes to compare modules.
 * \author mdejong
 */
namespace JDETECTOR {}
namespace JPP { using namespace JDETECTOR; }

namespace JDETECTOR {

  /**
   * Type definition of a module comparator using 3D position information.
   */
  typedef JLANG::JComparator<double (JVector3D::*)() const>  JModuleComparator;
  
  
  /**
   * Module comparator according its z-position.
   */
  struct JModuleComparator3Z_t :
    public JModuleComparator
  {
    /**
     * Default constructor.
     */
    JModuleComparator3Z_t() :
      JModuleComparator(&JVector3D::getZ)
    {}
  };

  
  /**
   * Module comparator according its distance to origin.
   */
  struct JModuleComparator3D_t :
    public JModuleComparator
  {
    /**
     * Default constructor.
     */
    JModuleComparator3D_t() :
      JModuleComparator(&JVector3D::getLength)
    {}
  };
}

#endif