JMatch.hh

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#ifndef __JTRIGGER__JMATCH__
#define __JTRIGGER__JMATCH__
 
#include "JLang/JClonable.hh"
 
 
/**
 * \file
 *
 * Base class for match operations for cluster and hit-preprocessing methods.
 * \author mdejong
 */
namespace JTRIGGER {}
namespace JPP { using namespace JTRIGGER; }
 
namespace JTRIGGER {
 
  using JLANG::JClonable;
 
 
  /**
   * Function object interface for hit matching.
   */
  template<class JHit_t>
  class JMatch : 
    public JClonable< JMatch<JHit_t> >
  {
  public:
    /** 
     * Virtual destructor.
     */
    virtual ~JMatch()
    {}
 
    
    /**
     * Match operator.
     *
     * \param  first    hit
     * \param  second   hit
     * \return          match result
     */
    virtual bool operator()(const JHit_t& first, const JHit_t& second) const = 0;
  };
 
 
  /**
   * Auxiliary class to handle pointer to match function.
   */
  template<class JHit_t>
  class JMatchHelper :
    public JClonable< JMatch<JHit_t> , JMatchHelper<JHit_t> >
  {
  public:
 
    typedef bool (*pFun)(const JHit_t&, const JHit_t&);    //!< pointer to match function
 
    /**
     * Constructor
     *
     * \param  match    pointer to match function
     */
    JMatchHelper(pFun match) :
      match(match)
    {}
 
 
    /**
     * Match operator.
     *
     * \param  first    hit
     * \param  second   hit
     * \return          match result
     */
    virtual bool operator()(const JHit_t& first, const JHit_t& second) const
    {
      return match(first, second);
    }
 
  protected:
    pFun match;
  };
 
 
  /**
   * Auxiliary method to make JMatch object based on pointer to match function.
   *
   * \param  match    pointer to match function
   * \return          match object
   */
  template<class JHit_t>
  JMatchHelper<JHit_t> make_match(bool (*match)(const JHit_t&, const JHit_t&))
  {
    return JMatchHelper<JHit_t>(match);
  }  
}
 
#endif