HDF5CFByte.cc

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// This file is part of the hdf5_handler implementing for the CF-compliant
// Copyright (c) 2011-2023 The HDF Group, Inc. and OPeNDAP, Inc.
//
// This is free software; you can redistribute it and/or modify it under the
// terms of the GNU Lesser General Public License as published by the Free
// Software Foundation; either version 2.1 of the License, or (at your
// option) any later version.
//
// This software is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
// License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
// You can contact The HDF Group, Inc. at 410 E University Ave,
// Suite 200, Champaign, IL 61820  

 
#include <memory>
#include <libdap/InternalErr.h>
#include "HDF5CFByte.h"
#include <BESDebug.h>
#include "h5common.h"
 
using namespace std;
using namespace libdap;
 
 
HDF5CFByte::HDF5CFByte(const string & n, const string &d) : Byte(n, d)
{
}
 
HDF5CFByte::HDF5CFByte(const string &n, const string &d,const string &d_f) : Byte(n, d),filename(d_f)
{
}
 
BaseType *HDF5CFByte::ptr_duplicate()
{
    auto HDF5CFByte_unique = make_unique<HDF5CFByte>(*this);
    return HDF5CFByte_unique.release();
}
 
bool HDF5CFByte::read()
{
    BESDEBUG("h5","Coming to HDF5CFByte read "<<endl);
 
    if (read_p())
        return true;
 
    hid_t file_id = H5Fopen(filename.c_str(),H5F_ACC_RDONLY,H5P_DEFAULT);
    if(file_id < 0) {
        throw InternalErr(__FILE__,__LINE__, "Fail to obtain the HDF5 file ID .");
    }
   
    hid_t dset_id = -1;
    dset_id = H5Dopen2(file_id,dataset().c_str(),H5P_DEFAULT);
 
    if(dset_id < 0) {
        H5Fclose(file_id);
        throw InternalErr(__FILE__,__LINE__, "Fail to obtain the dataset .");
    }
    
    try {
        dods_byte buf;
        get_data(dset_id, (void *) &buf);
 
        set_read_p(true);
        set_value(buf);
 
        // Release the handles.
        if (H5Dclose(dset_id) < 0) {
            throw InternalErr(__FILE__, __LINE__, "Unable to close the dset.");
        }
        H5Fclose(file_id);
    }
    catch(...) {
        H5Dclose(dset_id);
        H5Fclose(file_id);
        throw;
    }
 
    return true;
 
 
}