ShowerParticleIterator.cc

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#include <utl/ShowerParticleIterator.h>
#include <utl/AugerException.h>
#include <utl/VShowerFileParticleIterator.h>

#include <cstddef>


namespace utl {

  ShowerParticleIterator::ShowerParticleIterator(VShowerFileParticleIterator* const fileIt,
                                                 const CoordinateSystemPtr& cs) :
    fParticles(fileIt),
    fGroundCS(cs)
  {
    if (fParticles) {
      fParticles->Rewind();
      fCurrentParticle = fParticles->GetOneParticle(fGroundCS);
      if (!fCurrentParticle)
        fParticles = nullptr;
    }
  }


  void
  ShowerParticleIterator::CheckReference()
    const
  {
    if (!fCurrentParticle)
      throw InvalidIteratorException("Dereferencing invalid ShowerParticleIterator");
  }


  const Particle&
  ShowerParticleIterator::operator*()
    const
  {
    CheckReference();
    return *fCurrentParticle;
  }


  const Particle*
  ShowerParticleIterator::operator->()
    const
  {
    CheckReference();
    return fCurrentParticle;
  }


  ShowerParticleIterator&
  ShowerParticleIterator::operator++()
  {
    if (!fParticles)
      throw InvalidIteratorException("Incrementing invalid ShowerParticleIterator");

    fCurrentParticle = fParticles->GetOneParticle(fGroundCS);
    if (!fCurrentParticle)
      fParticles = nullptr;
    return *this;
  }


  ShowerParticleIterator
  ShowerParticleIterator::operator++(int)
  {
    ShowerParticleIterator old(*this);
    ++(*this);
    return old;
  }


  bool
  ShowerParticleIterator::operator==(const ShowerParticleIterator& it)
    const
  {
    return fParticles == it.fParticles &&
           fCurrentParticle == it.fCurrentParticle;
  }

}