cms::h5::DataSet Class Reference

#include <h5_DataSet.h>

Public Member Functions
	DataSet (hid_t iParentID, std::string const &iName)
	DataSet (hid_t iParentID, const void *iRef)
	DataSet (const DataSet &)=delete
	DataSet (DataSet &&)=delete
uint64_t	fileOffset () const
std::shared_ptr< Attribute >	findAttribute (std::string const &iName) const
uint32_t	layout () const
std::size_t	memorySize () const
DataSet &	operator= (const DataSet &)=delete
DataSet &	operator= (DataSet &&)=delete
std::vector< char >	readBytes () const
std::vector< hobj_ref_t >	readRefs () const
std::vector< cond::hdf5::IOVSyncValue >	readSyncValues () const
std::size_t	storageSize () const
	~DataSet ()

Private Member Functions
std::size_t	size () const

Private Attributes
hid_t	id_

Detailed Description

Definition at line 38 of file h5_DataSet.h.

Constructor & Destructor Documentation

DataSet() [1/4]

DataSet::DataSet	(	hid_t	iParentID,
		std::string const &	iName
	)

Definition at line 48 of file h5_DataSet.cc.

References Exception, and id_.

                                                          : id_(H5Dopen2(iParentID, iName.c_str(), H5P_DEFAULT)) {
    if (id_ < 0) {
      throw cms::Exception("UnknownH5DataSet") << "unable to find dataset " << iName;
    }
  }

DataSet() [2/4]

DataSet::DataSet	(	hid_t	iParentID,
		const void *	iRef
	)

Definition at line 54 of file h5_DataSet.cc.

References Exception, and id_.

                                                    : id_(H5Rdereference2(iParentID, H5P_DEFAULT, H5R_OBJECT, iRef)) {
    if (id_ < 0) {
      throw cms::Exception("BadH5DataSetRef") << "unable to derenfence dataset from parent " << iParentID;
    }
  }

~DataSet()

DataSet::~DataSet

(

)

Definition at line 65 of file h5_DataSet.cc.

References id_.

{ H5Dclose(id_); }

DataSet() [3/4]

cms::h5::DataSet::DataSet ( const DataSet &  )

delete

DataSet() [4/4]

cms::h5::DataSet::DataSet ( DataSet &&  )

delete

Member Function Documentation

fileOffset()

uint64_t DataSet::fileOffset

(

)

const

Definition at line 101 of file h5_DataSet.cc.

References id_.

{ return H5Dget_offset(id_); }

findAttribute()

std::shared_ptr< Attribute > DataSet::findAttribute

(

std::string const &

iName

)

const

Definition at line 86 of file h5_DataSet.cc.

References id_.

                                                                              {
    return std::make_shared<Attribute>(id_, iName);
  }

layout()

uint32_t DataSet::layout

(

)

const

Definition at line 103 of file h5_DataSet.cc.

References id_, and runTheMatrix::ret.

                                 {
    auto pl = H5Dget_create_plist(id_);
    auto ret = H5Pget_layout(pl);
    H5Pclose(pl);
    return ret;
  }

memorySize()

std::size_t DataSet::memorySize

(

)

const

Definition at line 100 of file h5_DataSet.cc.

References size().

{ return size(); }

operator=() [1/2]

DataSet& cms::h5::DataSet::operator= ( const DataSet &  )

delete

operator=() [2/2]

DataSet& cms::h5::DataSet::operator= ( DataSet &&  )

delete

readBytes()

std::vector< char > DataSet::readBytes

(

)

const

Definition at line 127 of file h5_DataSet.cc.

References Exception, id_, and size().

                                           {
    Type type_id{H5Dget_type(id_)};
    auto class_type = H5Tget_class(type_id.id_);
    if (class_type != H5T_INTEGER) {
      throw cms::Exception("BadDataSetType") << "asked to read dataset as a byte, but it is a " << class_type;
    }

    std::vector<char> bytes;
    bytes.resize(size());

    auto ret_value = H5Dread(id_, H5T_STD_I8LE, H5S_ALL, H5S_ALL, H5P_DEFAULT, bytes.data());
    if (ret_value < 0) {
      throw cms::Exception("BadH5Read") << "unable to read bytes dataset " << id_;
    }
    return bytes;
  }

readRefs()

std::vector< hobj_ref_t > DataSet::readRefs

(

)

const

Definition at line 110 of file h5_DataSet.cc.

References Exception, id_, and size().

                                                {
    Type type_id{H5Dget_type(id_)};
    auto class_type = H5Tget_class(type_id.id_);
    if (class_type != H5T_REFERENCE) {
      throw cms::Exception("BadDataSetType") << "asked to read dataset as a ref, but it is a " << class_type;
    }

    std::vector<hobj_ref_t> refs;
    refs.resize(size());

    auto ret_value = H5Dread(id_, H5T_STD_REF_OBJ, H5S_ALL, H5S_ALL, H5P_DEFAULT, refs.data());
    if (ret_value < 0) {
      throw cms::Exception("BadH5Read") << "unable to read ref dataset " << id_;
    }
    return refs;
  }

readSyncValues()

std::vector< cond::hdf5::IOVSyncValue > DataSet::readSyncValues

(

)

const

Definition at line 144 of file h5_DataSet.cc.

References Exception, id_, and size().

                                                                {
    Type sv_type_id{H5Tcreate(H5T_COMPOUND, sizeof(cond::hdf5::IOVSyncValue))};
    sv_type_id.insertMember("high", HOFFSET(cond::hdf5::IOVSyncValue, high_), H5T_NATIVE_UINT32);
    sv_type_id.insertMember("low", HOFFSET(cond::hdf5::IOVSyncValue, low_), H5T_NATIVE_UINT32);

    {
      const Type type_id{H5Dget_type(id_)};
      if (not H5Tequal(sv_type_id.id_, type_id.id_)) {
        throw cms::Exception("BadDataSetType")
            << "asked to read dataset as a IOVSyncValue, but it is a " << type_id.id_;
      }
    }

    std::vector<cond::hdf5::IOVSyncValue> syncValues;
    syncValues.resize(size());

    auto ret_value = H5Dread(id_, sv_type_id.id_, H5S_ALL, H5S_ALL, H5P_DEFAULT, syncValues.data());
    if (ret_value < 0) {
      throw cms::Exception("BadH5Read") << "unable to read IOVSyncValue dataset " << id_;
    }
    return syncValues;
  }

size()

std::size_t DataSet::size ( void  ) const

private

Definition at line 90 of file h5_DataSet.cc.

References cms::cuda::assert(), and id_.

Referenced by ntupleDataFormat._Collection::__iter__(), ntupleDataFormat._Collection::__len__(), memorySize(), readBytes(), readRefs(), and readSyncValues().

                                {
    DataSpace space_id{H5Dget_space(id_)};

    hssize_t num_elements = H5Sget_simple_extent_npoints(space_id.id_);
    assert(num_elements >= 0);

    return num_elements;
  }

storageSize()

std::size_t DataSet::storageSize

(

)

const

Definition at line 99 of file h5_DataSet.cc.

References id_.

{ return H5Dget_storage_size(id_); }

Member Data Documentation

id_

hid_t cms::h5::DataSet::id_

private

Definition at line 69 of file h5_DataSet.h.

Referenced by DataSet(), fileOffset(), findAttribute(), layout(), readBytes(), readRefs(), readSyncValues(), size(), storageSize(), and ~DataSet().