JReaderObjectIterator.hh

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#ifndef __JIO__JREADEROBJECTITERATOR__
#define __JIO__JREADEROBJECTITERATOR__
 
#include <type_traits>
 
 
#include "JLang/JAbstractObjectIterator.hh"
#include "JLang/JConversion.hh"
#include "JIO/JSerialisable.hh"
 
 
/**
 * \author mdejong
 */
 
namespace JIO {}
namespace JPP { using namespace JIO; }
 
namespace JIO {
 
  using JLANG::JAbstractObjectIterator;
 
 
  /**
   * JReader object iterator.
   *
   * This class implements the JLANG::JObjectIterator interface.
   */
  template<class T>
  class JReaderObjectIterator :
    public JAbstractObjectIterator<T>
  {
  public:
    /**
     * Constructor.
     *
     * \param  reader     reader input
     */
    JReaderObjectIterator(JReader& reader) :
      in(reader)
    {}
 
 
    /**
     * Set object.
     *
     * \param  object     reference to object to be set
     * \return            true if set; else false
     */
    virtual bool setObject(T& object) override 
    {
      return setObject(object, std::bool_constant<JLANG::JConversion<T,JSerialisable>::is_derived>());
    }
 
  private:
    bool setObject(T& object, std::true_type)  { return (bool) object.read(in); }
    bool setObject(T& object, std::false_type) { return (bool) (in >> object); }
 
    JReader& in;
  };
}
 
#endif