JVectorize.hh

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#ifndef __JLANG__JVECTORIZE__
#define __JLANG__JVECTORIZE__

#include <vector>


/**
 * \file
 * Auxiliary methods to convert data members or return values of member methods of a set of objects to a single vector.
 * \author mdejong
 */
namespace JLANG {}
namespace JPP { using namespace JLANG; }

namespace JLANG {

  /**
   * Method to create array of values of data member.
   *
   * \param  __begin      begin of data
   * \param  __end        end   of data
   * \param  value        pointer to data member
   * \return              data
   */
  template<class T, class JType_t, class JValue_t>
  inline const std::vector<JValue_t>& make_array(T __begin, T __end, JValue_t JType_t::*value)
  {
    static std::vector<JValue_t> buffer;

    buffer.clear();

    for (T __p = __begin; __p != __end; ++__p) {
      buffer.push_back(*__p.*value);
    }

    return buffer;
  }


  /**
   * Method to create array of return values of member method.
   *
   * \param  __begin      begin of data
   * \param  __end        end   of data
   * \param  function     pointer to member method
   * \return              data
   */
  template<class T, class JType_t, class JValue_t>
  inline const std::vector<JValue_t>& make_array(T __begin, T __end, JValue_t (JType_t::*function)() const)
  {
    static std::vector<JValue_t> buffer;

    buffer.clear();

    for (T __p = __begin; __p != __end; ++__p) {
      buffer.push_back((*__p.*function)());
    }

    return buffer;
  }



  /**
   * Method to create array of return values of member method.
   *
   * \param  __begin      begin of data
   * \param  __end        end   of data
   * \param  function     pointer to member method
   * \return              data
   */
  template<class T, class JType_t, class JValue_t>
  inline const std::vector<JValue_t>& make_array(T __begin, T __end, JValue_t (JType_t::*function)())
  {
    static std::vector<JValue_t> buffer;

    buffer.clear();

    for (T __p = __begin; __p != __end; ++__p) {
      buffer.push_back((*__p.*function)());
    }

    return buffer;
  }
}

#endif