Gaudi::Details::PropertyId Class Reference

Helper to record a property identifier as a sequence of SharedString instances. More...

#include </builds/gaudi/Gaudi/GaudiCoreSvc/src/JobOptionsSvc/PropertyId.h>

Collaboration diagram for Gaudi::Details::PropertyId:

Public Member Functions
	PropertyId (const std::string &s)
	PropertyId (std::string_view s)
std::string	str () const
	operator std::string () const
std::size_t	hash () const noexcept

Private Attributes
std::vector< SharedString >	m_chunks
std::size_t	m_hash

Friends
bool	operator== (const PropertyId &lhs, const PropertyId &rhs)

Detailed Description

Helper to record a property identifier as a sequence of SharedString instances.

A PropertyId instance initilized from a string like SomeName.OtherName.AnotherLevel.PropertyName will use internally a vector of 4 SharedString instances so that the storage for the various components can be shared with other PropertyId instances.

To be afficiently used as key in an std::unordered_map, PropertyId caches the hash computed from the string it was constructed from.

Definition at line 72 of file PropertyId.h.

Constructor & Destructor Documentation

PropertyId() [1/2]

Gaudi::Details::PropertyId::PropertyId ( const std::string &  s )

inline

Definition at line 74 of file PropertyId.h.

: PropertyId( std::string_view{ s } ) {}

PropertyId() [2/2]

Gaudi::Details::PropertyId::PropertyId ( std::string_view  s )

inline

Definition at line 75 of file PropertyId.h.

                                   {
      m_hash = std::hash<std::string_view>()( s );
      if ( !s.empty() ) {
        m_chunks.reserve( std::count( begin( s ), end( s ), '.' ) + 1 );
        while ( true ) {
          if ( auto pos = s.find( '.' ); pos != std::string_view::npos ) {
            m_chunks.emplace_back( s.substr( 0, pos ) );
            s.remove_prefix( pos + 1 );
          } else {
            m_chunks.emplace_back( s );
            break;
          }
        }
      }
    }

Member Function Documentation

hash()

std::size_t Gaudi::Details::PropertyId::hash ( ) const

inlinenoexcept

Definition at line 103 of file PropertyId.h.

{ return m_hash; }

operator std::string()

Gaudi::Details::PropertyId::operator std::string ( ) const

inline

Definition at line 101 of file PropertyId.h.

{ return str(); }

str()

std::string Gaudi::Details::PropertyId::str ( ) const

inline

Definition at line 91 of file PropertyId.h.

                          {
      auto        it = m_chunks.begin();
      std::string s{ *it++ };
      while ( it != m_chunks.end() ) {
        s += '.';
        s += *it++;
      }
      return s;
    }

Friends And Related Function Documentation

operator==

bool operator== ( const PropertyId &  lhs, const PropertyId &  rhs  )

friend

Definition at line 110 of file PropertyId.h.

{ return lhs.m_chunks == rhs.m_chunks; }

Member Data Documentation

m_chunks

std::vector<SharedString> Gaudi::Details::PropertyId::m_chunks

private

Definition at line 106 of file PropertyId.h.

m_hash

std::size_t Gaudi::Details::PropertyId::m_hash

private

Definition at line 107 of file PropertyId.h.

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

• GaudiCoreSvc/src/JobOptionsSvc/PropertyId.h