SCTOverlayConfig.py

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"""Define methods to construct configured SCT overlay algorithms
 
Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
"""
 
from AthenaConfiguration.ComponentAccumulator import ComponentAccumulator
from AthenaConfiguration.ComponentFactory import CompFactory
 
 
def SCTOverlayAlgCfg(flags, name="SCTOverlay", **kwargs):
    """Return a ComponentAccumulator for SCTOverlay algorithm"""
    acc = ComponentAccumulator()
 
    kwargs.setdefault("BkgInputKey", f"{flags.Overlay.BkgPrefix}SCT_RDOs" if not flags.Overlay.IgnoreBkgInputs else "")
    kwargs.setdefault("SignalInputKey", f"{flags.Overlay.SigPrefix}SCT_RDOs")
    kwargs.setdefault("OutputKey", "SCT_RDOs")
 
    # Input setup
    if kwargs["BkgInputKey"]:
        from SGComps.SGInputLoaderConfig import SGInputLoaderCfg
        acc.merge(SGInputLoaderCfg(flags, [f'SCT_RDO_Container#{kwargs["BkgInputKey"]}']))
 
    # Do SCT overlay
    acc.addEventAlgo(CompFactory.SCTOverlay(name, **kwargs))
 
    # Setup output
    if flags.Output.doWriteRDO:
        from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
        acc.merge(OutputStreamCfg(flags, "RDO", ItemList=[
            "SCT_RDO_Container#SCT_RDOs"
        ]))
 
        if not flags.Input.isMC:
            acc.merge(OutputStreamCfg(flags, "RDO", ItemList=[
                "IDCInDetBSErrContainer#SCT_ByteStreamErrs"
            ]))
 
    if flags.Output.doWriteRDO_SGNL:
        from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
        acc.merge(OutputStreamCfg(flags, "RDO_SGNL", ItemList=[
            f"SCT_RDO_Container#{flags.Overlay.SigPrefix}SCT_RDOs"
        ]))
 
    # for track overlay, write out the signal RDOs because reco tracking will only run on them
    if flags.Overlay.doTrackOverlay:
        acc.merge(OutputStreamCfg(flags, "RDO", ItemList=[
            f"SCT_RDO_Container#{flags.Overlay.SigPrefix}SCT_RDOs"
        ]))
 
    return acc
 
 
def SCTTruthOverlayCfg(flags, name="SCTSDOOverlay", **kwargs):
    """Return a ComponentAccumulator for the SCT SDO overlay algorithm"""
    acc = ComponentAccumulator()
 
    # We do not need background SCT SDOs
    kwargs.setdefault("BkgInputKey", "")
 
    kwargs.setdefault("SignalInputKey", f"{flags.Overlay.SigPrefix}SCT_SDO_Map")
    kwargs.setdefault("OutputKey", "SCT_SDO_Map")
 
    # Do SCT truth overlay
    acc.addEventAlgo(CompFactory.InDetSDOOverlay(name, **kwargs))
 
    # Setup output
    if flags.Output.doWriteRDO:
        from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
        acc.merge(OutputStreamCfg(flags, "RDO", ItemList=[
            "InDetSimDataCollection#SCT_SDO_Map"
        ]))
 
    if flags.Output.doWriteRDO_SGNL:
        from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
        acc.merge(OutputStreamCfg(flags, "RDO_SGNL", ItemList=[
            f"InDetSimDataCollection#{flags.Overlay.SigPrefix}SCT_SDO_Map"
        ]))
 
    return acc
 
 
def SCTOverlayCfg(flags):
    """Configure and return a ComponentAccumulator for SCT overlay"""
    acc = ComponentAccumulator()
 
    # Add SCT overlay digitization algorithm
    from SCT_Digitization.SCT_DigitizationConfig import SCT_OverlayDigitizationBasicCfg
    acc.merge(SCT_OverlayDigitizationBasicCfg(flags))
 
    # Add SCT overlay algorithm
    acc.merge(SCTOverlayAlgCfg(flags))
 
    # Add SCT truth overlay
    if flags.Digitization.EnableTruth:
        acc.merge(SCTTruthOverlayCfg(flags))
 
    return acc