CaloIDHelper::HashGroup Class Reference

Manage a list of identifiers. More...

#include <CaloIDHelper.h>

Collaboration diagram for CaloIDHelper::HashGroup:

Public Member Functions
	HashGroup ()
	Constructor.
template<class T>
int	init (T &parent, const std::string &type, const MultiRange &full_range, Identifier(T::*idfunc)(const ExpandedIdentifier &) const, size_type end_index)
	Initialize.
int	init (const std::string &name, const std::set< Identifier > &ids, size_type end_index, const MultiRange *full_range=0)
	Initialize.
size_type	hash_max () const
	Return one more than the largest hash code.
id_iterator	begin () const
	Return a begin iterator over the group's Identifiers.
id_iterator	end () const
	Return an end iterator over the group's Identifiers.
id_range	range () const
	Return an iterator range over the group's Identifiers.
Identifier	id (IdentifierHash hashId) const
	Return the identifier for a given hash code (no checking).
int	get_hash (Identifier id, IdentifierHash &hash_id) const
	Look up the hash code corresponding to an Identifier.
IdentifierHash	hash (Identifier id) const
	Look up the hash code corresponding to an Identifier.
const std::vector< Identifier > &	ids () const
	Return a vector of all Identifiers for this group.
size_type	end_index () const
	Return the ending index of the context for this group.
IdContext	context () const
	Return the context for this group.

Private Attributes
std::vector< Identifier >	m_id_vec
	List of Identifiers for this group.
size_type	m_end_index
	Ending index for this group's context.

Detailed Description

Manage a list of identifiers.

The identifiers are kept in sorted order, and the index of an identifier in this list defines its hash value. We supply methods for converting between identifiers and the hash value; we also keep track of the corresponding ID context.

Most calo ID helpers will use two of these: one for channels (cells) and one for regiosn.

Definition at line 59 of file CaloIDHelper.h.

Constructor & Destructor Documentation

HashGroup()

CaloIDHelper::HashGroup::HashGroup

(

)

Constructor.

Starts in an uninitialized state.

Definition at line 25 of file CaloIDHelper.cxx.

  : m_end_index(99999)
{
}

Member Function Documentation

begin()

id_iterator CaloIDHelper::HashGroup::begin

(

)

const

Return a begin iterator over the group's Identifiers.

context()

IdContext CaloIDHelper::HashGroup::context

(

)

const

Return the context for this group.

Definition at line 80 of file CaloIDHelper.cxx.

{
  ExpandedIdentifier id;
  return IdContext (id, 0, m_end_index);
}

end()

id_iterator CaloIDHelper::HashGroup::end

(

)

const

Return an end iterator over the group's Identifiers.

end_index()

size_type CaloIDHelper::HashGroup::end_index

(

)

const

Return the ending index of the context for this group.

get_hash()

int CaloIDHelper::HashGroup::get_hash	(	Identifier	id,
		IdentifierHash &	hash_id ) const

Look up the hash code corresponding to an Identifier.

Look up the hash code corresponding ot an Identifier.

Uses binary search.

Parameters

	id	The identifier to look up.
[out]	hash_id	The corresponding hash code.

Returns

0 if the Identifier was found; non-zero otherwise.

Definition at line 65 of file CaloIDHelper.cxx.

{
  std::vector<Identifier>::const_iterator it = std::lower_bound(m_id_vec.begin(),m_id_vec.end(),id);
  if ( it != m_id_vec.end() ){
    hash_id = it - m_id_vec.begin();
    return 0;
  }
  return 1;
}

hash()

IdentifierHash CaloIDHelper::HashGroup::hash

(

Identifier

id

)

const

Look up the hash code corresponding to an Identifier.

Uses binary search.

Parameters

id	The identifier to look up.

Returns

The corresponding hash code. An invalid IdentifierHash will be returned if the Identifier is not found.

hash_max()

size_type CaloIDHelper::HashGroup::hash_max

(

)

const

Return one more than the largest hash code.

id()

Identifier CaloIDHelper::HashGroup::id

(

IdentifierHash

hashId

)

const

Return the identifier for a given hash code (no checking).

ids()

const std::vector< Identifier > & CaloIDHelper::HashGroup::ids

(

)

const

Return a vector of all Identifiers for this group.

init() [1/2]

int CaloIDHelper::HashGroup::init	(	const std::string &	name,
		const std::set< Identifier > &	ids,
		size_type	end_index,
		const MultiRange *	full_range = 0 )

Initialize.

Parameters

name	Name of this group (only for error reporting).
ids	Set of Identifiers comprising this group.
end_index	The ending index for the context for this group.
full_range	The MultiRange corresponding to this group. If supplied, the side of the ids set is checked against the range's cardinality.

Returns

0 on success; non-zero on failure.

Definition at line 41 of file CaloIDHelper.cxx.

{
  m_end_index = end_index;
  if (full_range && full_range->cardinality() != ids.size()) {
    MsgStream log(Athena::getMessageSvc(), name);
    log << MSG::ERROR << "set size " << ids.size()
        << " not equal to hash max " << full_range->cardinality() << endmsg;
    return 1;
  }
  m_id_vec.assign (ids.begin(), ids.end());
  return 0;
}

init() [2/2]

template<class T>

int CaloIDHelper::HashGroup::init	(	T &	parent,
		const std::string &	type,
		const MultiRange &	full_range,
		Identifier(T::*	idfunc )(const ExpandedIdentifier &) const,
		size_type	end_index )

Initialize.

Parameters

parent	The parent ID helper (in which idfunc is defined).
type	A string to add on to the name.
full_range	The MultiRange for to this group.
idfunc	Function to convert from an ExpandedIdentifier to an Identifier for this group.
end_index	The ending index for the context for this group.

Returns

0 on success; non-zero on failure.

range()

id_range CaloIDHelper::HashGroup::range

(

)

const

Return an iterator range over the group's Identifiers.

Member Data Documentation

m_end_index

size_type CaloIDHelper::HashGroup::m_end_index

private

Ending index for this group's context.

Definition at line 152 of file CaloIDHelper.h.

m_id_vec

std::vector<Identifier> CaloIDHelper::HashGroup::m_id_vec

private

List of Identifiers for this group.

Definition at line 149 of file CaloIDHelper.h.

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

• CaloIDHelper.h
• CaloIDHelper.cxx