Reader.hpp

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* Copyright (c) 2012, Howard Butler, hobu.inc@gmail.com
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#ifndef INCLUDED_PDAL_DRIVER_SOCI_READER_HPP
#define INCLUDED_PDAL_DRIVER_SOCI_READER_HPP

#include <pdal/Reader.hpp>
#include <pdal/ReaderIterator.hpp>
#include <pdal/GDALUtils.hpp>

#include <pdal/drivers/soci/common.hpp>
#include <boost/scoped_ptr.hpp>
#include <boost/scoped_array.hpp>

#include <vector>

namespace pdal
{
namespace drivers
{
namespace soci
{



class PDAL_DLL Reader : public pdal::Reader
{
public:
    SET_STAGE_NAME("drivers.soci.reader", "SOCI Reader")

    Reader(const Options&);
    ~Reader();

    virtual void initialize();
    virtual const Options getDefaultOptions() const;
    virtual void addDefaultDimensions();

    bool supportsIterator(StageIteratorType t) const
    {
        if (t == StageIterator_Sequential) return true;
        return false;
    }
    
    virtual boost::uint64_t getNumPoints() const;

    pdal::StageSequentialIterator* createSequentialIterator(PointBuffer& buffer) const;

    // std::string getQueryString() const;
    // void defineBlock(Statement statement, BlockPtr block) const;
    // 
    // 
    // QueryType getQueryType() const
    // {
    //     return m_querytype;
    // }
    // Schema fetchSchema(Statement statement, sdo_pc* pc, boost::uint32_t& capacity) const;
    // pdal::SpatialReference fetchSpatialReference(Statement statement, sdo_pc* pc) const;


private:

    Reader& operator=(const Reader&); // not implemented
    Reader(const Reader&); // not implemented
    //

    Database_Type m_database_type;
        
    // Connection m_connection;
    // Statement m_initialQueryStatement;
    // QueryType m_querytype;
    // 
    // BlockPtr m_block;
    // boost::uint32_t m_capacity;
    // 
    // // Fields in the form of NAME:TYPE
    // std::map<std::string, int> m_fields;
    // 
    // boost::shared_ptr<pdal::gdal::Debug> m_gdal_debug;
    mutable boost::uint64_t m_cachedPointCount;


};

namespace iterators
{

namespace sequential
{


class IteratorBase
{
public:
    IteratorBase(const pdal::drivers::soci::Reader& reader);
    ~IteratorBase();

protected:
    const pdal::drivers::soci::Reader& getReader() const;

    // boost::uint32_t myReadBuffer(PointBuffer& data);
    // boost::uint32_t unpackOracleData(PointBuffer& data);
    // 
    // boost::uint32_t myReadClouds(PointBuffer& data);
    // boost::uint32_t myReadBlocks(PointBuffer& data);
    // 
    // BufferPtr fetchPointBuffer(Statement statment, sdo_pc* pc);
    // 
    // Statement m_block_statement;
    // Statement m_initialQueryStatement;
    // bool m_at_end;
    // bool m_at_end_of_blocks;
    // bool m_at_end_of_clouds;
    // QueryType m_querytype;
    // BlockPtr m_block;
    // BlockPtr m_cloud_block;
    // boost::int32_t m_active_cloud_id;
    // BufferPtr m_oracle_buffer;
    // BufferMap m_buffers;
    // boost::uint32_t m_buffer_position;


private:
    const pdal::drivers::soci::Reader& m_reader;

    // Statement getNextCloud(BlockPtr block, boost::int32_t& cloud_id);
    // void readBlob(Statement statement,
    //               BlockPtr block,
    //               boost::uint32_t howMany);
    // void fillUserBuffer(PointBuffer& user_buffer);
    // 
    // void copyOracleData(PointBuffer& source, 
    //                     PointBuffer& destination, 
    //                     Dimension const& dest_dim, 
    //                     boost::uint32_t source_starting_position, 
    //                     boost::uint32_t destination_starting_position,
    //                     boost::uint32_t howMany);
    // pdal::Bounds<double> getBounds(Statement statement, BlockPtr block);
    IteratorBase& operator=(const IteratorBase&); // not implemented
    IteratorBase(const IteratorBase&); // not implemented;


};


class Reader : public IteratorBase, public pdal::StageSequentialIterator
{
public:
    Reader(const pdal::drivers::soci::Reader& reader, PointBuffer& buffer);
    ~Reader();

private:
    boost::uint64_t skipImpl(boost::uint64_t count);
    boost::uint32_t readBufferImpl(PointBuffer& data);
    bool atEndImpl() const;
};


} // sequential

} // iterators
}
}
} // namespace pdal::driver::oci


#endif // INCLUDED_PDAL_DRIVER_OCI_READER_HPP