ObjectCounter< C > Class Template Reference

#include <ObjectCounter.h>

Inheritance diagram for ObjectCounter< C >:

List of all members.

Public Member Functions
void	endJob ()
	end-of-job processing
	ObjectCounter (const edm::ParameterSet &)
	constructor from parameter set
Private Member Functions
virtual void	analyze (const edm::Event &, const edm::EventSetup &)
	event processing
Private Attributes
unsigned long	n2Sum_
unsigned long	n_
	partial statistics
unsigned long	nSum_
std::string	src_
	label of source collection
bool	verbose_
	verbosity flag

---

Detailed Description

template<typename C>
class ObjectCounter< C >

Counts the number of objects in a collection and prints a summary report at the end of a job.

Template parameters:

• C : collection type

Author:

Luca Lista, INFN

Version:

Revision:

1.1

Id:

ObjectCounter.h,v 1.1 2009/03/03 13:07:27 llista Exp

Definition at line 26 of file ObjectCounter.h.

---

Constructor & Destructor Documentation

template<typename C >

ObjectCounter< C >::ObjectCounter

(

const edm::ParameterSet &

par

)

[explicit]

constructor from parameter set

Definition at line 45 of file ObjectCounter.h.

                                                            : 
  src_( par.template getParameter<std::string>( "src" ) ), 
  verbose_( par.template getUntrackedParameter<bool>( "verbose", true ) ),
  n_( 0 ), nSum_( 0 ), n2Sum_( 0 ) {
}

---

Member Function Documentation

template<typename C >

void ObjectCounter< C >::analyze	(	const edm::Event &	evt,
		const edm::EventSetup &
	)		[private, virtual]

event processing

Implements edm::EDAnalyzer.

Definition at line 68 of file ObjectCounter.h.

References benchmark_cfg::cerr, edm::Event::getByLabel(), h, edm::HandleBase::isValid(), and n.

                                                                          {
  edm::Handle<C> h;
  evt.getByLabel( src_, h );
  if (!h.isValid()) {
    std::cerr << ">>> product: " << src_ << " not found" << std::endl;
  } else {
    int n = h->size();
    nSum_ += n;
    n2Sum_ += ( n * n );
  }
  ++ n_;
}

template<typename C >

void ObjectCounter< C >::endJob

(

void

)

[virtual]

end-of-job processing

Reimplemented from edm::EDAnalyzer.

Definition at line 52 of file ObjectCounter.h.

References gather_cfg::cout, n, asciidump::s, and mathSSE::sqrt().

                              {
  double n = 0, n2 = 0, s;
  if ( n_!= 0 ) {
    n = double( nSum_ ) / n_;
    n2 = double ( n2Sum_ ) / n_;
  }
  s = sqrt( n2 - n * n );
  if ( verbose_ ) {
    edm::TypeID id( typeid( typename C::value_type ) );
    std::cout << ">>> collection \"" << src_ << "\" contains (" 
              << n << " +/- " << s << ") "  
              << id.friendlyClassName() << " objects" << std::endl;
  }
}

---

Member Data Documentation

template<typename C >

unsigned long ObjectCounter< C >::n2Sum_ [private]

Definition at line 41 of file ObjectCounter.h.

template<typename C >

unsigned long ObjectCounter< C >::n_ [private]

partial statistics

Definition at line 41 of file ObjectCounter.h.

template<typename C >

unsigned long ObjectCounter< C >::nSum_ [private]

Definition at line 41 of file ObjectCounter.h.

template<typename C >

std::string ObjectCounter< C >::src_ [private]

label of source collection

Definition at line 37 of file ObjectCounter.h.

template<typename C >

bool ObjectCounter< C >::verbose_ [private]

verbosity flag

Definition at line 39 of file ObjectCounter.h.