Handle object to access datasets in hdf5 formatted file with go4 event data implementation for std::vector collections. More...

#include <TGo4HDF5DataHandle.h>

Inheritance diagram for TGo4HDF5VectorDataHandle:

Public Member Functions
	TGo4HDF5VectorDataHandle (const char *name, size_t datasize)
	create new data handle

virtual	~TGo4HDF5VectorDataHandle ()

void	BuildReadDataset (H5::H5File file, TGo4HDF5Source parent) override
	create datasets and buffers for reading this structure from hdf5 file.

void	BuildWriteDataset (H5::H5File *file) override
	create datasets for writing memory structure of type into file.

void	Read (hsize_t sequencenum, H5::H5File *file) override
	Read event of sequence number from file.

void	SetElementSize (size_t len)
	remember size of a single element (structure) in this collection, if it is one.

void	SetObjectPointer (void *memptr) override
	define location of corresponding object in memory.

void	Write (hsize_t sequencenum, H5::H5File *ile) override
	Write event of sequence number from file.

Public Member Functions inherited from TGo4HDF5BasicDataHandle
	TGo4HDF5BasicDataHandle (const char *name, size_t datasize)
	create new data handle

virtual	~TGo4HDF5BasicDataHandle ()

Public Member Functions inherited from TGo4HDF5DataHandle
	TGo4HDF5DataHandle (const char *name, size_t datasize)
	create new data handle

virtual	~TGo4HDF5DataHandle ()

TGo4HDF5DataHandle *	AddSubMember (const char name, size_t datasize, const char collectiontype=nullptr)
	create new subhandle for complex member component on heap.

void *	Data () const

TGo4HDF5DataHandle *	FindSubMember (const char *name)
	lookup if subcomponent of name already is in list.

TGo4HDF5DataHandle *	GetSubMember (UInt_t ix)

H5::CompType *	GetType () const
	return handle for type descriptor.

const char *	GetTypeName () const

void	InsertTypeMember (const H5std_string &name, size_t offset, const H5::DataType &new_member)
	wrapper function to define contained structure member.

void	SetActive (Bool_t on)

void	SetAllSubMembersActive (Bool_t on)

void	SetMemberClass (const char *clname)
	type of the member to access from outside

void	SetMemberName (const char *name)
	identifier for the member to access from outside using the top event handle

void	SetParentOffset (size_t off)
	remember location of this object relative to upper level object.

void	SetTopEvent (TGo4EventElement *eve)
	pass the top level event element down the member hierarchy.

void	SetTopEventClass (const char *classname)
	pass the top level event element class down the member hierarchy.

Protected Attributes
size_t	fiElementSize {0}
	size of the (collection element) structure

H5::CompType *	fxCollection {nullptr}
	collection type with fxType as entries

TGo4HDF5VarContainer	fxVarHandle
	handle for variable arrays

Protected Attributes inherited from TGo4HDF5BasicDataHandle
Char_t *	fxReadBuffer {nullptr}
	secondary read bounce buffer for hdf5

Protected Attributes inherited from TGo4HDF5DataHandle
Bool_t	fbDataSetActive {kFALSE}
	we may disable this dataset temporarily from writing or reading useful for dynamic vector of vector components

Bool_t	fbDataSetExists {kFALSE}
	check on the fly if this handle has already created a dataset

size_t	fiDataSize {0}
	size of data structure in bytes, for redefining output dataset

ULong_t	fiEntries {0}
	number of event entries found in file dataspace

size_t	fiParentOffset {0}
	offset of this data structure relative to top level event object

size_t	fiReadOffset {0}
	begin of real eventdata payload after event object pointer

void *	fxData {nullptr}
	pointer to begin of data in memory

H5::DataSet	fxDataSet
	dataset containing the structure

H5::DataSpace *	fxDataSpace {nullptr}
	dataspace in memory

TGo4EventElement *	fxEvent {nullptr}
	the top level event element to access the current data member from outside

TString	fxEventClass
	the top level event element classname to access the current data member from outside

H5::DataSpace	fxFileSpace
	dataspace in file

TString	fxMemberClass
	classname of the entry for interpreter to operate e.g.

TString	fxMemberHandle
	predefined interpreter access command e.g.

TGo4HDF5Source *	fxParentSource {nullptr}
	backpointer to parent source for exceptions

std::vector< TGo4HDF5DataHandle * >	fxSubcomponents
	collect sub-components of the referenced data object

H5::CompType *	fxType {nullptr}
	component type representing the data structure

TString	fxTypeName
	identifier of the dataset

Additional Inherited Members
Static Public Attributes inherited from TGo4HDF5DataHandle
static TGo4HDF5DataHandleFactory	fxFactory

Protected Member Functions inherited from TGo4HDF5BasicDataHandle
void	AllocReadBuffer (size_t size)
	(Re-)allocate read buffer depending on the object size read from file