JSampler.hh

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#ifndef __JLANG__JSAMPLER__
#define __JLANG__JSAMPLER__

#include "JLang/JObjectIterator.hh"


/**
 * \author mdejong
 */

namespace JLANG {}
namespace JPP { using namespace JLANG; }

namespace JLANG {

  /**
   * Template class for sampling from a JRewindableObjectIterator.
   *
   * This class should be specialised for other samplings than complete.
   */
  template<class T>
  struct JSampler {
    /**
     * Default constructor.
     */
    JSampler()
    {}

    
    /**
     * Acceptance test operator.
     * Return value 0 means accept and >0 number of objects to skip.
     *
     * \param  object       object
     * \return              0
     */
    skip_type operator()(const T& object) const
    {
      return 0;
    }
  };
}

#endif