metadata.h

/*
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 *  Point Cloud Library (PCL) - www.pointclouds.org
 *  Copyright (c) 2010-2012, Willow Garage, Inc.
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#pragma once
 
#include <boost/filesystem.hpp>
#include <vector>
#include <ostream>
 
namespace pcl
{
  namespace outofcore
  {
    
    /** \class AbstractMetadata
     *
     *  \brief Abstract interface for outofcore metadata file types
     *
     *  \ingroup outofcore
     *  \author Stephen Fox (foxstephend@gmail.com)
     */
 
    class PCL_EXPORTS OutofcoreAbstractMetadata
    {
    public:
      
      /** \brief Empty constructor */
      OutofcoreAbstractMetadata () = default;
      
      virtual
      ~OutofcoreAbstractMetadata () = default;
      
      /** \brief Write the metadata in the on-disk format, e.g. JSON. */
      virtual void
      serializeMetadataToDisk () = 0;
 
      /** \brief Method which should read and parse metadata and store
       *  it in variables that have public getters and setters*/
      virtual int
      loadMetadataFromDisk (const boost::filesystem::path& path_to_metadata) = 0;
      
      /** \brief Should write the same ascii metadata that is saved on
       *   disk, or a human readable format of the metadata in case a binary format is being used */
      friend std::ostream& 
      operator<<(std::ostream& os, const OutofcoreAbstractMetadata& metadata_arg);
      
    protected:
      
      /** \brief Constructs the metadata ascii which can be written to disk or piped to stdout */
      virtual void
      writeMetadataString (std::vector<char>& buf) =0;
      
    };
    
  }//namespace outofcore
}//namespace pcl