HDFDMRArray_SDS.h

// This file is part of the hdf4 data handler for the OPeNDAP data server.
// It retrieves HDF4 SDS values for a direct DMR-mapping DAP4 response.
// Each SDS will be mapped to a DAP variable.
 
//  Authors:   Kent Yang <myang6@hdfgroup.org>
// Copyright (c) The HDF Group
 
#ifndef HDFDMRARRAY_SDS_H
#define HDFDMRARRAY_SDS_H
 
#include "mfhdf.h"
#include "hdf.h"
 
#include <libdap/Array.h>
 
class HDFDMRArray_SDS:public libdap::Array
{
    public:
        HDFDMRArray_SDS (const std::string& filename, int32 objref,  int32 rank, unsigned int dtype_size, const std::string & n = "", libdap::BaseType * v = nullptr):
            Array (n, v),
            filename(filename),
            sds_ref (objref),
            sds_rank (rank), 
            sds_typesize(dtype_size) {
        }
        ~ HDFDMRArray_SDS () override = default;
       
        // Standard way of DAP handlers to pass the coordinates of the subsetted region to the handlers
        // Return the number of elements to read.  
        int format_constraint (int *cor, int *step, int *edg);
 
        libdap::BaseType *ptr_duplicate () override
        {
            return new HDFDMRArray_SDS (*this);
        }
 
        bool read () override;
 
    private:
 
        std::string filename;
        int32 sds_ref;
 
        // SDS array rank
        int32 sds_rank ;
 
        unsigned int sds_typesize ;
 
 
};
 
 
#endif