#ifndef __JSUPPORT__JMULTIPLEFILESAMPLER__
#define __JSUPPORT__JMULTIPLEFILESAMPLER__

#include "JLang/JSampler.hh"
#include "JLang/JObjectSampler.hh"
#include "JSupport/JMultipleFileScanner.hh"


/**
 * \author mdejong
 */

namespace JSUPPORT {}
namespace JPP { using namespace JSUPPORT; }

namespace JSUPPORT {

  using JLANG::JSampler;
  using JLANG::JObjectSampler;

  /**
   * Auxiliary base class to sample from a list of files.
   */
  template<class T>
  struct JMultipleFileSampler_t {
    /**
     * Smart pointer operator.
     *
     * \return          pointer to scanner
     */
    const JMultipleFileScanner<T>* const operator->() const
    {
      return &scanner;
    }

    /**
     * Smart pointer operator.
     *
     * \return          pointer to scanner
     */
    JMultipleFileScanner<T>* operator->()
    {
      return &scanner;
    }

  protected:
    JMultipleFileScanner<T> scanner;
  };


  /**
   * Auxiliary class to sample from a list of files.
   */
  template<class T, template<class> class JSampler_t = JSampler>
  struct JMultipleFileSampler :
    public JMultipleFileSampler_t<T>,
    public JObjectSampler<T, JSampler_t>
  {

    typedef JSampler_t<T>   sampler_type;

    
    /**
     * Constructor.
     *
     * \param  sampler      sampler
     */
    JMultipleFileSampler(const sampler_type& sampler = sampler_type()) :
      JMultipleFileSampler_t<T>(),
      JObjectSampler<T, JSampler_t>(this->scanner, sampler)
    {}
  };
}

#endif