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Fix Python ownership transfer to LCIO containers #226

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Fix Python ownership transfer to LCIO containers #226

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24 changes: 24 additions & 0 deletions src/python/pyLCIO/base/DecorateLcioClasses.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
@author: <a href="mailto:christian.grefe@cern.ch">Christian Grefe</a>
'''

import ROOT
from ROOT import TVector3, TLorentzVector
from pyLCIO import EVENT, IMPL, IO, UTIL
from array import array
Expand Down Expand Up @@ -113,6 +114,28 @@ def getTracks( self ):
return self.getCollection( EVENT.LCIO.TRACK )


def decorateOwnership():
'''Transfer Python-owned objects to the LCIO containers that own them.'''
if '_pyLCIO_addElement' not in dir( IMPL.LCCollectionVec ):
IMPL.LCCollectionVec._pyLCIO_addElement = IMPL.LCCollectionVec.addElement

def addElement( self, obj ):
IMPL.LCCollectionVec._pyLCIO_addElement( self, obj )
if not self.isSubset():
ROOT.SetOwnership( obj, False )

IMPL.LCCollectionVec.addElement = addElement

if '_pyLCIO_addCollection' not in dir( IMPL.LCEventImpl ):
IMPL.LCEventImpl._pyLCIO_addCollection = IMPL.LCEventImpl.addCollection

def addCollection( self, collection, name ):
IMPL.LCEventImpl._pyLCIO_addCollection( self, collection, name )
ROOT.SetOwnership( collection, False )

IMPL.LCEventImpl.addCollection = addCollection


# List of LCIO classes to decorate
lcioClasses = [ EVENT.LCEvent,
EVENT.CalorimeterHit,
Expand Down Expand Up @@ -194,5 +217,6 @@ def decorateClass( o ):

def decorateLcioClasses():
''' Standard method to decorate all LCIO classes '''
decorateOwnership()
for lcioClass in lcioClasses:
decorateClass( lcioClass )
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