hdf5accessimpl.h

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#pragma once
/*+
________________________________________________________________________
 
 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        Bert
 Date:          Feb 2018
________________________________________________________________________
 
-*/
 
#include "hdf5common.h"
#include "H5Cpp.h"
 
 
namespace HDF5
{
 
class ReaderImpl;
class WriterImpl;
 
 
mExpClass(ODHDF5) AccessImpl
{
public:
 
                        AccessImpl(ReaderImpl&);
                        AccessImpl(WriterImpl&);
    virtual             ~AccessImpl();
 
    static void         setErrPrint(bool);      
 
protected:
 
    const char*         gtFileName() const;
    DataSetKey          gtScope() const;
    od_int64            gtGroupID() const;
 
    bool                haveGroup() const;
    bool                haveDataSet() const;
    bool                atGroup(const char*&) const;
    bool                atDataSet(const char*) const;
 
                        // no throw
    void                doCloseFile(Access&);
 
    H5::Group*          selectGroup(const char*) const;
    H5::DataSet*        selectDataSet(const char*) const;
    H5::H5Object*       stScope(const DataSetKey*) const;
    H5::H5Object*       stScope(const DataSetKey*);
    H5::Group*          stGrpScope(const DataSetKey*) const;
    H5::Group*          stGrpScope(const DataSetKey*);
    H5::DataSet*        stDSScope(const DataSetKey&) const;
    H5::DataSet*        stDSScope(const DataSetKey&);
 
    void                selectSlab(H5::DataSpace&,const SlabSpec&,
                                   TypeSet<hsize_t>* pcounts=0) const;
    static bool         haveErrPrint();
 
    typedef H5::PredType H5DataType;
    static const H5DataType& h5DataTypeFor(ODDataType);
 
    Access&             acc_;
    mutable H5::Group   group_;
    mutable H5::DataSet dataset_;
    mutable ArrayNDInfo::nr_dims_type nrdims_;
 
private:
 
                        AccessImpl(const AccessImpl&)   = delete;
 
    static bool         validH5Obj(const H5::H5Object&);
 
    static void         disableErrPrint(); // before action with 'normal' throw
    static void         restoreErrPrint(); // after such an action
    static void         enableErrPrint();
 
};
 
 
mExpClass(ODHDF5) AccessProviderImpl : public AccessProvider
{
public:
 
    mDefaultFactoryInstantiation( AccessProvider, AccessProviderImpl,
                        "OD", toUiString("OD") );
 
    virtual Reader*     getReader() const;
    virtual Writer*     getWriter() const;
 
    static void         initHDF5(); 
 
};
 
} // namespace HDF5
 
 
#define mGetDataSpaceDims( dims, nrdims, dataspace ) \
    TypeSet<hsize_t> dims( nrdims, (hsize_t)0 ); \
    dataspace.getSimpleExtentDims( dims.arr() )