Simple convenient iterator class for LCCollections that saves some boiler plate code. More...

#include <LCIterator.h>

Public Member Functions
	LCIterator (EVENT::LCEvent *evt, const std::string &name)
	Constructor that reads the collection with the given name from the event - note: no exception is thrown if the collection is not in the event, this will behave the same as an empty collection - use operator() to test, if the collection exists. More...

	LCIterator (const EVENT::LCCollection *col)
	Constructor for the given collection. More...

T *	next ()
	Returns the next element as long as there is one, otherwise 0 is returned. More...

int	size ()
	Size of the collection. More...

const EVENT::LCCollection *	operator-> ()
	Serves as a handle to the LCCollection itself, to provide access to the collection parameters etc. More...

const EVENT::LCCollection *	operator() ()
	Return pointer to LCCollection, e.g. More...

Private Member Functions
	LCIterator ()

Private Attributes
int	_n {0}

int	_i

const EVENT::LCCollection *	_col

Detailed Description

template<class T>
class UTIL::LCIterator< T >

Simple convenient iterator class for LCCollections that saves some boiler plate code.

LCIterators can be constructed either form an LCCollection or from the LCEvent and and a collection name.

Examples:

 // ------ use with while():
 LCIterator<TrackerHit> it( evt, "VXDCollection" ) ;
 while( TrackerHit* hit = it.next()  ){

    hitMap[ hit->getCellID0() ] = hit ;
 }

 // --- with for() :
 for(  LCIterator<Track> it( col ) ;  Track* trk = it.next()  ; ) {

    std::cout << trk->getTrackState( TrackState::AtIP ) << std::endl  ;
 }

Author: F.Gaede, DESY

Version: $Id:$

Definition at line 39 of file LCIterator.h.

Constructor & Destructor Documentation

template<class T >

UTIL::LCIterator< T >::LCIterator ( )

inlineprivate

Definition at line 41 of file LCIterator.h.

template<class T >

UTIL::LCIterator< T >::LCIterator	(	EVENT::LCEvent *	evt,
		const std::string &	name
	)

inline

Constructor that reads the collection with the given name from the event - note: no exception is thrown if the collection is not in the event, this will behave the same as an empty collection - use operator() to test, if the collection exists.

Definition at line 50 of file LCIterator.h.

References UTIL::LCIterator< T >::_col, UTIL::LCIterator< T >::_n, std::endl(), EVENT::LCCollection::getElementAt(), EVENT::LCCollection::getNumberOfElements(), and std::stringstream::str().

template<class T >

UTIL::LCIterator< T >::LCIterator ( const EVENT::LCCollection * col )