metafunctor to access DCO HDF5 facilities. More...

#include <HDF5DCOMetaFunctor.hxx>

Inheritance diagram for dueca::hdf5log::HDF5DCOMetaFunctor:

Collaboration diagram for dueca::hdf5log::HDF5DCOMetaFunctor:

Public Member Functions
	HDF5DCOMetaFunctor ()
	Constructor.

	~HDF5DCOMetaFunctor ()
	Destructor.

virtual const H5::DataType *	operator() ()
	Get a HDF5 datatype; not always defined!

virtual HDF5DCOWriteFunctor *	getWriteFunctor (std::weak_ptr< H5::H5File > file, const std::string &path, size_t chunksize, const std::string &label, const dueca::DataTimeSpec *startend, bool compress=false, bool writeticks=true)=0
	Get an arrayed HDF5 channel reading & file writing functor.

virtual HDF5DCOReadFunctor *	getReadFunctor (std::weak_ptr< H5::H5File > file, const std::string &path, bool readticks=true)=0
	Get an HDF5 channel writing & file reading functor.

Public Member Functions inherited from dueca::DCOMetaFunctor
	DCOMetaFunctor ()
	Constructor.

virtual	~DCOMetaFunctor ()
	Destructor.

Detailed Description

metafunctor to access DCO HDF5 facilities.

Two modes of interaction

Get a datatype for writing the whole DCO object as a compound HDF5 datatype. Note that this only works for DCO objects with fixed-length strings, fixed length arrays (fixvector) and variable length arrays (limvector, varvector). DCO with fancier stuff like variable length strings, and stl containers do not allow this, and throw an exception.
Get a functor for reading a channel and writing the data into hdf5 format. This creates an hdf5 dataset for each variable in the DCO object. Again, limitations apply, the variables may not be dco objects for which a datatype cannot be obtained as described above. The hdf5 datasets are written as follows:

path/tick - for DUECA tick values

path/data/<member1> - first data member

path/data/<membern> - datasets for all data members

for the future, if the DCO has a parent class, the structure

is deepened further; note that currently the parent data is not

written.

path/<Parent> - ONLY for DCO with parent class

path/<Parent>/data - all the members of this parent

and possibly:

path/<Parent>/<Parent2>/data etc.

dueca::StreamReaderLatest
This is a "light weight object" that enables you to read the latest set of data on a StreamChannelEnd...
Definition StreamReaderLatest.hxx:43

Member Function Documentation

virtual HDF5DCOWriteFunctor * dueca::hdf5log::HDF5DCOMetaFunctor::getWriteFunctor	(	std::weak_ptr< H5::H5File >	file,
		const std::string &	path,
		size_t	chunksize,
		const std::string &	label,
		const dueca::DataTimeSpec *	startend,
		bool	compress = false,
		bool	writeticks = true )

pure virtual

Get an arrayed HDF5 channel reading & file writing functor.

Parameters

file	HDF5 file on which to write
path	Base path for writing the data.
chunksize	Size of data chunks.
label	Label to be written to the file
startend	Pointer to a time spec controlling run/pause in logging
compress	You can guess
writeticks	If true, time is also logged

Returns: A functor object, that can be accepted by a channel token to apply the operation, in this case writing data to HDF5 file

virtual HDF5DCOReadFunctor * dueca::hdf5log::HDF5DCOMetaFunctor::getReadFunctor	(	std::weak_ptr< H5::H5File >	file,
		const std::string &	path,
		bool	readticks = true )

pure virtual

Get an HDF5 channel writing & file reading functor.

Parameters

file	HDF5 file from which to read.
path	Base path for reading the data.
readticks	If true, time also read from the file

Returns: A functor object, that can be accepted by a channel token to apply the operation, in this case writing data to HDF5 file

The documentation for this class was generated from the following file: