columnar::TestUtils::BranchReader< T > Class Template Reference

Collaboration diagram for columnar::TestUtils::BranchReader< T >:

Public Member Functions
	BranchReader (const std::string &val_branchName)
	~BranchReader () noexcept
	BranchReader (const BranchReader &)=delete
BranchReader &	operator= (const BranchReader &)=delete
void	setIsStatic (bool isStatic)
const std::string &	branchName () const
std::string	columnName () const
std::string	containerName () const
void	connectTree (TTree *tree)
void	connectTree (const Backend &b)
const T &	getEntry (Long64_t entry)
const T &	getCachedEntry () const
std::optional< float >	entrySize () const
std::optional< float >	uncompressedSize () const
std::optional< unsigned >	numBaskets ()

Private Attributes
std::string	m_branchName
TBranch *	m_branch = nullptr
bool	m_isStatic = std::is_pod_v<T>
T *	m_data {new T()}

Detailed Description

template<typename T>
class columnar::TestUtils::BranchReader< T >

Definition at line 28 of file ColumnReaderTTree.cxx.

Constructor & Destructor Documentation

BranchReader() [1/2]

template<typename T>

columnar::TestUtils::BranchReader< T >::BranchReader ( const std::string & val_branchName )

inline

Definition at line 36 of file ColumnReaderTTree.cxx.

         : m_branchName(val_branchName) 
        {
         if (m_branchName.find("Aux.") != std::string::npos)
          m_isStatic = true;
        }

~BranchReader()

template<typename T>

columnar::TestUtils::BranchReader< T >::~BranchReader ( )

inlinenoexcept

Definition at line 43 of file ColumnReaderTTree.cxx.

      { 
        delete m_data; 
      }

BranchReader() [2/2]

template<typename T>

columnar::TestUtils::BranchReader< T >::BranchReader ( const BranchReader< T > & )

delete

Member Function Documentation

branchName()

template<typename T>

const std::string & columnar::TestUtils::BranchReader< T >::branchName ( ) const

inlinenodiscard

Definition at line 56 of file ColumnReaderTTree.cxx.

      { 
        return m_branchName; 
      }

columnName()

template<typename T>

std::string columnar::TestUtils::BranchReader< T >::columnName ( ) const

inlinenodiscard

Definition at line 61 of file ColumnReaderTTree.cxx.

      {
        std::string columnName = m_branchName;
        if (auto index = columnName.find("AuxDyn."); index != std::string::npos)
          columnName.replace(index, 6, "");
        else if (auto index = columnName.find("Aux."); index != std::string::npos)
          columnName.replace(index, 3, "");
        else if (columnName.find(".") != std::string::npos)
          throw std::runtime_error("branch name does not contain AuxDyn or Aux: " +m_branchName);
        return columnName;
      }

connectTree() [1/2]

template<typename T>

void columnar::TestUtils::BranchReader< T >::connectTree ( const Backend & b )

inline

Definition at line 97 of file ColumnReaderTTree.cxx.

      {
        auto* tree = std::get<TTree*>(b);  // throws if wrong backend
        connectTree(tree);
      }

connectTree() [2/2]

template<typename T>

void columnar::TestUtils::BranchReader< T >::connectTree ( TTree * tree )

inline

Definition at line 85 of file ColumnReaderTTree.cxx.

      {
        m_branch = tree->GetBranch(m_branchName.c_str());
        if (!m_branch)
          throw std::runtime_error("failed to get branch: " + m_branchName);
        m_branch->SetMakeClass(1);
        if (m_isStatic)
          m_branch->SetAddress(m_data);
        else
         m_branch->SetAddress(&m_data);
      }

containerName()

template<typename T>

std::string columnar::TestUtils::BranchReader< T >::containerName ( ) const

inlinenodiscard

Definition at line 73 of file ColumnReaderTTree.cxx.

      {
        if (auto index = m_branchName.find("AuxDyn."); index != std::string::npos)
          return m_branchName.substr(0, index);
        else if (auto index = m_branchName.find("Aux."); index != std::string::npos)
          return m_branchName.substr(0, index);
        else if (m_branchName.find(".") == std::string::npos)
          return m_branchName;
        else
          throw std::runtime_error("branch name does not contain AuxDyn or Aux: " +m_branchName);
      }

entrySize()

template<typename T>

std::optional< float > columnar::TestUtils::BranchReader< T >::entrySize ( ) const

inline

Definition at line 119 of file ColumnReaderTTree.cxx.

      {
        if (!m_branch)
          return std::nullopt;
        return static_cast<float>(m_branch->GetZipBytes()) / m_branch->GetEntries();
      }

getCachedEntry()

template<typename T>

const T & columnar::TestUtils::BranchReader< T >::getCachedEntry ( ) const

inline

Definition at line 114 of file ColumnReaderTTree.cxx.

      { 
        return *m_data; 
      }

getEntry()

template<typename T>

const T & columnar::TestUtils::BranchReader< T >::getEntry ( Long64_t entry )

inline

Definition at line 103 of file ColumnReaderTTree.cxx.

      {
        if (!m_branch)
          throw std::runtime_error("branch not connected: " + m_branchName);
        if (m_branch->GetEntry(entry) <= 0)
          throw std::runtime_error("failed to get entry " + std::to_string(entry) + " for branch: " + m_branchName);
        if (m_data == nullptr)
          throw std::runtime_error("got nullptr reading data for branch: " + m_branchName);
        return *m_data;
      }

numBaskets()

template<typename T>

std::optional< unsigned > columnar::TestUtils::BranchReader< T >::numBaskets ( )

inline

Definition at line 135 of file ColumnReaderTTree.cxx.

      {
        if (!m_branch)
          return std::nullopt;
        return m_branch->GetListOfBaskets()->GetSize();
      }

operator=()

template<typename T>

BranchReader & columnar::TestUtils::BranchReader< T >::operator= ( const BranchReader< T > & )

delete

setIsStatic()

template<typename T>

void columnar::TestUtils::BranchReader< T >::setIsStatic ( bool isStatic )

inline

Definition at line 51 of file ColumnReaderTTree.cxx.

      { 
        m_isStatic = isStatic; 
      }

uncompressedSize()

template<typename T>

std::optional< float > columnar::TestUtils::BranchReader< T >::uncompressedSize ( ) const

inline

Definition at line 126 of file ColumnReaderTTree.cxx.

      {
        if (!m_branch)
          return std::nullopt;
        return static_cast<float>(m_branch->GetTotBytes()) / m_branch->GetEntries();
      }

Member Data Documentation

m_branch

template<typename T>

TBranch* columnar::TestUtils::BranchReader< T >::m_branch = nullptr

private

Definition at line 31 of file ColumnReaderTTree.cxx.

m_branchName

template<typename T>

std::string columnar::TestUtils::BranchReader< T >::m_branchName

private

Definition at line 30 of file ColumnReaderTTree.cxx.

m_data

template<typename T>

T* columnar::TestUtils::BranchReader< T >::m_data {new T()}

private

Definition at line 33 of file ColumnReaderTTree.cxx.

{new T()};

m_isStatic

template<typename T>

bool columnar::TestUtils::BranchReader< T >::m_isStatic = std::is_pod_v<T>

private

Definition at line 32 of file ColumnReaderTTree.cxx.

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

• ColumnReaderTTree.cxx