file_grabber.h

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/*
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 * $Id: file_grabber.h 8413 2013-01-15 08:37:39Z sdmiller $
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#pragma once
#ifndef PCL_IO_FILE_GRABBER_H_
#define PCL_IO_FILE_GRABBER_H_

#include <pcl/point_cloud.h>

namespace pcl
{
  template <typename PointT>
  class PCL_EXPORTS FileGrabber
  {
  public:

    virtual ~FileGrabber () {}

    virtual const boost::shared_ptr< const pcl::PointCloud<PointT> >
    operator[] (size_t idx) const = 0;

    virtual size_t
    size () const = 0;
    
    virtual const boost::shared_ptr< const pcl::PointCloud<PointT> >
    at (size_t idx) const
    {
      if (idx >= size ())
      {
        // Throw error 
        throw pcl::IOException ("[pcl::FileGrabber] Attempted to access element which is out of bounds!");
      }
      else
      {
        return (operator[] (idx));
      }
    }
  };
}
#endif//PCL_IO_FILE_GRABBER_H_