UTIL::LCIterator< T > Class Template Reference

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

#include <UTIL/LCIterator.h>

List of all members.

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.
	LCIterator (EVENT::LCCollection *col)
	Constructor for the given collection.
T *	next ()
	Returns the next element as long as there is one, otherwise 0 is returned.
int	size ()
	Size of the collection.
EVENT::LCCollection *	operator-> ()
	Serves as a handle to the LCCollection itself, to provide access to the collection parameters etc.
EVENT::LCCollection *	operator() ()
	Return pointer to LCCollection, e.g.

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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:

$Id:$

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Member Function Documentation

template<class T>

EVENT::LCCollection* UTIL::LCIterator< T >::operator()

(

)

[inline]

Return pointer to LCCollection, e.g.

for testing whether the collections was in the event.

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

• LCIterator.h