#include <FileInPath.h>

Public Types
enum	LocationCode { Unknown = 0, Local = 1, Release = 2, Data = 3 }

Public Member Functions
	FileInPath ()

	FileInPath (const std::string &r)
	We throw an exception is the referenced file is not found. More...

	FileInPath (const char *r)

	FileInPath (FileInPath const &other)

std::string	fullPath () const

LocationCode	location () const
	Where was the file found? More...

FileInPath &	operator= (FileInPath const &other)

void	read (std::istream &is)

void	readFromParameterSetBlob (std::istream &is)

std::string	relativePath () const

void	swap (FileInPath &other)

void	write (std::ostream &os) const

	~FileInPath ()

Private Member Functions
void	getEnvironment ()

void	initialize_ ()

Private Attributes
std::string	canonicalFilename_

std::string	dataTop_

std::string	localTop_

LocationCode	location_

std::string	relativePath_

std::string	releaseTop_

std::string	searchPath_

Detailed Description

Definition at line 68 of file FileInPath.h.

Member Enumeration Documentation

enum edm::FileInPath::LocationCode

Enumerator
Unknown
Local
Release
Data

Definition at line 72 of file FileInPath.h.

                       {
       Unknown = 0,
       Local = 1,
       Release = 2,
       Data = 3
     };

Constructor & Destructor Documentation

FileInPath::FileInPath ( )

Default c'tor does no file-existence check; what file would it check for existence?

Definition at line 90 of file FileInPath.cc.

References getEnvironment().

                          :
     relativePath_(),
     canonicalFilename_(),
     location_(Unknown)
   {
     getEnvironment();
   }

FileInPath::FileInPath ( const std::string & r )

explicit

We throw an exception is the referenced file is not found.

Definition at line 98 of file FileInPath.cc.

References getEnvironment(), and initialize_().

                                            :
     relativePath_(r),
     canonicalFilename_(),
     location_(Unknown)
   {
     getEnvironment();
     initialize_();
   }

FileInPath::FileInPath ( const char * r )

explicit

Definition at line 107 of file FileInPath.cc.

References edm::hlt::Exception, edm::errors::FileInPathError, getEnvironment(), and initialize_().

                                       :
     relativePath_(r ? r : ""),
     canonicalFilename_(),
     location_(Unknown)
   {
     if(r == 0) {
      throw edm::Exception(edm::errors::FileInPathError) << "Relative path must not be null\n";
     }
     getEnvironment();
     initialize_();    
   }

FileInPath::FileInPath ( FileInPath const & other )

Definition at line 119 of file FileInPath.cc.

                                                 :
     relativePath_(other.relativePath_),
     canonicalFilename_(other.canonicalFilename_),
     location_(other.location_),
     localTop_(other.localTop_),
     releaseTop_(other.releaseTop_),
     dataTop_(other.dataTop_),
     searchPath_(other.searchPath_)
   {}

FileInPath::~FileInPath ( )

Definition at line 129 of file FileInPath.cc.

129 {}

Member Function Documentation

std::string FileInPath::fullPath ( ) const

Return a string that can be used to open the referenced file.

Note that operations on this file may fail, including testing for existence. This is because the state of a filesystem is global; other threads, processes, etc., may have removed the file since we checked on its existence at the time of construction of the FileInPath object.

Definition at line 165 of file FileInPath.cc.

References canonicalFilename_.

Referenced by MillePedeAlignmentAlgorithm::addPxbSurvey(), SiStripBadFiberBuilder::algoAnalyze(), SiStripBadChannelBuilder::algoAnalyze(), SiStripNoisesBuilder::analyze(), SiStripThresholdBuilder::analyze(), SiStripApvGainBuilder::analyze(), SiStripPedestalsBuilder::analyze(), JetCorrectorDemo::analyze(), SiStripNoiseNormalizedWithApvGainBuilder::analyze(), SiStripApvGainBuilderFromTag::analyze(), MuonGeometrySVGTemplate::analyze(), cms::HcalConstantsASCIIWriter::analyze(), DetIdSelectorTest::analyze(), BeamSpotFakeConditions::BeamSpotFakeConditions(), AntiElectronIDMVA5::beginEvent(), JetCorrectorDBWriter::beginJob(), ProtonTaggerFilter::beginJob(), cms::HcalConstantsASCIIWriter::beginJob(), PileUpProducer::beginRun(), GoodSeedProducer::beginRun(), BOOST_PYTHON_MODULE(), HcalTPGCoderULUT::buildCoder(), SiStripDetVOffBuilder::BuildDetVOffObj(), MagGeoBuilderFromDDD::buildInterpolator(), MaterialBudgetCategorizer::buildMaps(), CaloMiscalibTools::CaloMiscalibTools(), CaloMiscalibToolsMC::CaloMiscalibToolsMC(), l1t::CaloParamsESProducer::CaloParamsESProducer(), CastorTextCalibrations::CastorTextCalibrations(), SiStripBadModuleGenerator::createObject(), SiStripThresholdGenerator::createObject(), SiStripNoisesGenerator::createObject(), SiStripLatencyGenerator::createObject(), SiStripBaseDelayGenerator::createObject(), SiStripBackPlaneCorrectionGenerator::createObject(), SiStripLorentzAngleGenerator::createObject(), CSCMonitorModule::CSCMonitorModule(), CSCTFPtLUT::CSCTFPtLUT(), CustomPhysicsList::CustomPhysicsList(), CustomPhysicsListSS::CustomPhysicsListSS(), HcalTPGCoderULUT::dbRecordCallback(), dtCalibration::DTTTrigResidualCorrection::DTTTrigResidualCorrection(), EcalDQMonitorClient::EcalDQMonitorClient(), ElectronIdMVAProducer::ElectronIdMVAProducer(), ElectronPATIdMVAProducer::ElectronPATIdMVAProducer(), OccupancyPlots::endRun(), ESDataFormatterV4::ESDataFormatterV4(), ESElectronicsMapper::ESElectronicsMapper(), gen::EvtGenLHCInterface::EvtGenLHCInterface(), FastL1GlobalAlgo::FastL1GlobalAlgo(), MultipleScatteringX0Data::fileName(), CSCReadoutMappingFromFile::fill(), SiStripGain::fillNewGain(), popcon::SiStripPopConHandlerUnitTest< T >::fillObject(), popcon::SiStripPopConHandlerUnitTestGain< T >::fillObject(), popcon::SiStripPopConHandlerUnitTestNoise< T >::fillObject(), muonisolation::IsolatorByNominalEfficiency::findPath(), GeometryConfiguration::GeometryConfiguration(), ESTrivialConditionRetriever::getChannelStatusFromConfiguration(), EcalTrivialConditionRetriever::getChannelStatusFromConfiguration(), getfullpathfromfip_(), EcalTrivialConditionRetriever::getMappingFromConfiguration(), SiStripGainFromAsciiFile::getNewObject(), SiStripBadStripFromASCIIFile::getNewObject(), EcalMappingElectronicsHandler::getNewObjects(), cond::FipProtocolParser::getRealConnect(), EcalTrivialConditionRetriever::getTrgChannelStatusFromConfiguration(), ESTrivialConditionRetriever::getWeightsFromConfiguration(), EcalTrivialConditionRetriever::getWeightsFromConfiguration(), HcalLaserEventFilter2012::HcalLaserEventFilter2012(), HcalTextCalibrations::HcalTextCalibrations(), HcalRecHitsMaker::init(), gen::EvtGenInterface::init(), ApeSettingAlgorithm::initialize(), PileupJetIdProducer::initJetEnergyCorrector(), JetCalibrationParameterSetTauJet::JetCalibrationParameterSetTauJet(), JetPartonNamespace::JetPartonCalibrationParameterSet::JetPartonCalibrationParameterSet(), L1GtTriggerMenuXmlProducer::L1GtTriggerMenuXmlProducer(), L1MuDTPhiLut::load(), L1MuDTPtaLut::load(), L1MuDTEtaPatternLut::load(), L1MuDTQualPatternLut::load(), L1MuDTExtLut::load(), EcalDeadChannelRecoveryNN< DetIdT >::load_file(), ClusterShapeHitFilter::loadStripLimits(), SiStripHashedDetIdFakeESSource::make(), SiStripFedCablingFakeESSource::make(), jpt::Map::Map(), MultiEventFilter::MultiEventFilter(), MuonErrorMatrix::MuonErrorMatrix(), PhysicsTools::MVAComputerESSourceBase::MVAComputerESSourceBase(), PhysicsTools::MVATrainer::MVATrainer(), NuclearInteractionSimulator::NuclearInteractionSimulator(), gen::Herwig6Instance::openParticleSpecFile(), HcalTBObjectUnpacker::parseCalib(), DDLParser::parseOneFile(), EcalTrigPrimESProducer::parseTextFile(), EcalTrigTowerConstituentsMapBuilder::parseTextMap(), CaloTowerConstituentsMapBuilder::parseTextMap(), PileupJetIdAlgo::PileupJetIdAlgo(), cms::PileupJPTJetIdAlgo::PileupJPTJetIdAlgo(), SiPixelFakeCPEGenericErrorParmESSource::produce(), SiPixelFakeGenErrorDBObjectESSource::produce(), SiPixelFakeTemplateDBObjectESSource::produce(), HepPDTESSource::produce(), SiPixelFakeGainForHLTESSource::produce(), SiPixelFakeGainESSource::produce(), SiPixelFakeGainOfflineESSource::produce(), SiPixelFakeLorentzAngleESSource::produce(), CaloTPGTranscoderULUTs::produce(), MaskedRctInputDigiProducer::produce(), JetCorrectionESSource< Corrector >::produce(), gen::PtYDistributor::PtYDistributor(), SiStripFEDErrorsDQM::readBadAPVs(), SiStripBadComponentsDQMService::readBadComponents(), FIPConfiguration::readConfig(), CSCTFPtLUT::readLUT(), CSCSectorReceiverLUT::readLUTsFromFile(), SiStripNoisesDQMService::readNoises(), GsfBetheHeitlerUpdator::readParameters(), SiStripPedestalsDQMService::readPedestals(), gen::ReggeGribovPartonMCHadronizer::ReggeGribovPartonMCHadronizer(), RPCCalibSetUp::RPCCalibSetUp(), RPCDBSimSetUp::RPCDBSimSetUp(), RPCRecHitProducer::RPCRecHitProducer(), gen::Pythia6Service::setPYUPDAParams(), gen::Pythia6Service::setSLHAParams(), ESPedestalClient::setup(), PhiSymmetryCalibration::setUp(), SiPixelActionExecutor::setupQTests(), ShiftedJetProducerT< T, Textractor >::ShiftedJetProducerT(), ShiftedPFCandidateProducerForNoPileUpPFMEt::ShiftedPFCandidateProducerForNoPileUpPFMEt(), SiStripBadModuleByHandBuilder::SiStripBadModuleByHandBuilder(), SiStripDetInfoFileReader::SiStripDetInfoFileReader(), SiStripDQMProfileToTkMapConverter::SiStripDQMProfileToTkMapConverter(), SiStripHitEffFromCalibTree::SiStripHitEffFromCalibTree(), SiStripQuality::SiStripQuality(), SiStripQualityHotStripIdentifier::SiStripQualityHotStripIdentifier(), SiStripQualityHotStripIdentifierRoot::SiStripQualityHotStripIdentifierRoot(), SiStripQualityStatistics::SiStripQualityStatistics(), PhysicsTools::MVATrainerLooper::Trainer::Trainer(), l1t::TriggerMenuXmlProducer::TriggerMenuXmlProducer(), TtSemiLepHitFitProducer< LeptonCollection >::TtSemiLepHitFitProducer(), and ZSPJPTJetCorrector::ZSPJPTJetCorrector().

   {
     return canonicalFilename_;
   }

void FileInPath::getEnvironment ( void )

private

Definition at line 374 of file FileInPath.cc.

References dataTop_, edm::hlt::Exception, edm::errors::FileInPathError, localTop_, releaseTop_, and searchPath_.

Referenced by FileInPath().

                              {
     if (!envstring(RELEASETOP, releaseTop_)) {
       releaseTop_.clear();
     }
     if (releaseTop_.empty()) {
       // RELEASETOP was not set.  This means that the environment is set
       // for the base release itself.  So LOCALTOP actually contains the 
       // location of the base release.
       if (!envstring(LOCALTOP, releaseTop_)) {
         releaseTop_.clear();
       }
     } else {
       if (!envstring(LOCALTOP, localTop_)) {
     localTop_.clear();
       }
     }
     if (!envstring(DATATOP, dataTop_)) {
       dataTop_.clear();
     }
     if (!envstring(PathVariableName, searchPath_)) {
       throw edm::Exception(edm::errors::FileInPathError)
     << PathVariableName
     << " must be defined\n";
     }
   }

void FileInPath::initialize_ ( )

private

Definition at line 401 of file FileInPath.cc.

References beamvalidation::br, canonicalFilename_, Data, dataTop_, end, edm::hlt::Exception, edm::errors::FileInPathError, Local, localTop_, location_, cmsHarvester::path, relativePath_, Release, releaseTop_, searchPath_, and edm::tokenize().

Referenced by FileInPath().

   {
     if (relativePath_.empty())
       throw edm::Exception(edm::errors::FileInPathError)
     << "Relative path must not be empty\n";
 
     // Find the file, based on the value of path variable.
     typedef std::vector<std::string> stringvec_t;
     stringvec_t  pathElements = tokenize(searchPath_, ":");
     stringvec_t::const_iterator it =  pathElements.begin();
     stringvec_t::const_iterator end = pathElements.end();
     while (it != end) {
       // Set the boost::fs path to the current element of
       // CMSSW_SEARCH_PATH:
       bf::path pathPrefix(*it);
 
       // Does the a file exist? locateFile throws is it finds
       // something goofy.
       if (locateFile(pathPrefix, relativePath_)) {
     // Convert relative path to canonical form, and save it.
     relativePath_ = bf::path(relativePath_).normalize().string();
       
     // Save the absolute path.
 #if ((BOOST_VERSION / 100000) >= 1) && (((BOOST_VERSION / 100) % 1000) >= 47)
     canonicalFilename_ = bf::absolute(relativePath_, 
                       pathPrefix).string();
 #else
         canonicalFilename_ = bf::complete(relativePath_, 
                                           pathPrefix).string();
 #endif
     if (canonicalFilename_.empty())
       throw edm::Exception(edm::errors::FileInPathError)
         << "fullPath is empty"
         << "\nrelativePath() is: " << relativePath_
         << "\npath prefix is: " << pathPrefix.string()
         << '\n';
 
     // From the current path element, find the branch path (basically the path minus the
     // last directory, e.g. /src or /share):
     for (bf::path br = pathPrefix.branch_path(); !br.normalize().string().empty(); br = br.branch_path()) {
 
       if (!localTop_.empty()) {
         // Create a path object for our local path LOCALTOP:
         bf::path local_(localTop_);
         // If the branch path matches the local path, the file was found locally:
         if (br == local_) {
           location_ = Local;
           return;
         }
       }
 
       if (!releaseTop_.empty()) {
         // Create a path object for our release path RELEASETOP:
         bf::path release_(releaseTop_);
         // If the branch path matches the release path, the file was found in the release:
         if (br == release_) {
           location_ = Release;
           return;
         }
       }
 
       if (!dataTop_.empty()) {
         // Create a path object for our data path DATATOP:
         bf::path data_(dataTop_);
         // If the branch path matches the data path, the file was found in the data area:
         if (br == data_) {
           location_ = Data;
           return;
         }
       }
     }
         
     // This is really gross --- this organization of if/else
     // inside the while-loop should be changed so that
     // this break isn't needed.
       }
       // Keep trying
       ++it;
     }
     
     // If we got here, we ran out of path elements without finding
     // what we're looking found.
     throw edm::Exception(edm::errors::FileInPathError)
       << "edm::FileInPath unable to find file "
       << relativePath_
       << " anywhere in the search path."
       << "\nThe search path is defined by: "
       << PathVariableName
       << "\n${"
       << PathVariableName
       << "} is: "
       << getenv(PathVariableName.c_str())
       << "\nCurrent directory is: "
       << bf::initial_path().string()
       << "\n";    
   }

FileInPath::LocationCode FileInPath::location ( ) const

Where was the file found?

Definition at line 159 of file FileInPath.cc.

References location_.

Referenced by AntiElectronIDMVA5::beginEvent(), edm::operator==(), ShiftedJetProducerT< T, Textractor >::ShiftedJetProducerT(), and ShiftedPFCandidateProducerForNoPileUpPFMEt::ShiftedPFCandidateProducerForNoPileUpPFMEt().

   {
     return location_;
   }

FileInPath & FileInPath::operator= ( FileInPath const & other )

Definition at line 132 of file FileInPath.cc.

References swap(), and groupFilesInBlocks::temp.

   {
     FileInPath temp(other);
     this->swap(temp);
     return *this;
   }

void FileInPath::read ( std::istream & is )

Read from the given istream, and set contents accordingly. Reading errors are reflected in the state of the stream.

Definition at line 234 of file FileInPath.cc.

References canonicalFilename_, dataTop_, edm::hlt::Exception, edm::errors::FileInPathError, Local, localTop_, location_, relativePath_, Release, releaseTop_, AlCaHLTBitMon_QueryRunRegistry::string, Unknown, and BeamSplash_cfg::version.

Referenced by edm::operator>>().

   {
     std::string vsn;
     std::string relname;
     std::string canFilename;
 #if 1
     // This #if needed for backward compatibility
     // for files written before CMSSW_1_5_0_pre3.
     is >> vsn;
     if (!is) return;
     bool oldFormat = (version != vsn);
     if (oldFormat) {
       relname = vsn;
       bool local;
       is >> local;
       location_ = (local ? Local : Release);
       is >> canFilename;
     } else {
       // Current format
       int loc;
       is >> relname >> loc;
       location_ = static_cast<FileInPath::LocationCode>(loc);
       if (location_ != Unknown) is >> canFilename;
     }
 #else
     is >> vsn >> relname >> loc >> canFilename;
 #endif
     if (!is) return;
     relativePath_ = relname;
     if (location_ == Local) {
       if (localTop_.empty()) {
     throw edm::Exception(edm::errors::FileInPathError)
       << "Environment Variable " 
       << LOCALTOP
       << " is not set.\n"
       << "Trying to read Local file: " << canFilename << ".\n";
       }
 #if 1
       // This #if needed for backward compatibility
       // for files written before CMSSW_1_5_0_pre3.
       if (oldFormat) {
         canonicalFilename_ = canFilename;
       } else
 #endif
       canonicalFilename_ = localTop_ + canFilename;
     } else if (location_ == Release) {
       if (releaseTop_.empty()) {
     throw edm::Exception(edm::errors::FileInPathError)
       << "Environment Variable " 
       << RELEASETOP
       << " is not set.\n";
       }
 #if 1
       // This #if needed for backward compatibility
       // for files written before CMSSW_1_5_0_pre3.
       if (oldFormat) {
          std::string::size_type pos = canFilename.find(BASE);
         if (pos == 0) {
           // Replace the placehoder with the path to the base release (site dependent).
           canonicalFilename_ = releaseTop_ + canFilename.substr(BASE.size());
         } else {
           // Needed for files written before CMSSW_1_2_0_pre2.
           canonicalFilename_ = canFilename;
         }
       } else
 #endif
       canonicalFilename_ = releaseTop_ + canFilename;
     } else if (location_ == Data) {
       if (dataTop_.empty()) {
     throw edm::Exception(edm::errors::FileInPathError)
       << "Environment Variable " 
       << DATATOP
       << " is not set.\n";
       }
       canonicalFilename_ = dataTop_ + canFilename;
     }
   }

void FileInPath::readFromParameterSetBlob ( std::istream & is )

Definition at line 313 of file FileInPath.cc.

References canonicalFilename_, dataTop_, edm::hlt::Exception, edm::errors::FileInPathError, Local, localTop_, location_, relativePath_, Release, releaseTop_, AlCaHLTBitMon_QueryRunRegistry::string, Unknown, and BeamSplash_cfg::version.

Referenced by edm::decode().

   {
     std::string vsn;
     std::string relname;
     std::string canFilename;
     is >> vsn;
     if (!is) return;
     bool oldFormat = (version != vsn);
     if (oldFormat) {
       relname = vsn;
       bool local;
       is >> local;
       location_ = (local ? Local : Release);
       is >> canFilename;
     } else {
       // Current format
       int loc;
       is >> relname >> loc;
       location_ = static_cast<FileInPath::LocationCode>(loc);
       if (location_ != Unknown) is >> canFilename;
     }
     if (!is) return;
     relativePath_ = relname;
     if (location_ == Local) {
       if (localTop_.empty()) {
     localTop_ = "@LOCAL";
       }
       if (oldFormat) {
         canonicalFilename_ = canFilename;
       } else
       canonicalFilename_ = localTop_ + canFilename;
     } else if (location_ == Release) {
       if (releaseTop_.empty()) {
     releaseTop_="@RELEASE";
       }
       if (oldFormat) {
          std::string::size_type pos = canFilename.find(BASE);
         if (pos == 0) {
           // Replace the placehoder with the path to the base release (site dependent).
           canonicalFilename_ = releaseTop_ + canFilename.substr(BASE.size());
         } else {
           // Needed for files written before CMSSW_1_2_0_pre2.
           canonicalFilename_ = canFilename;
         }
       } else
       canonicalFilename_ = releaseTop_ + canFilename;
     } else if (location_ == Data) {
       if (dataTop_.empty()) {
     throw edm::Exception(edm::errors::FileInPathError)
       << "Environment Variable " 
       << DATATOP
       << " is not set.\n";
       }
       canonicalFilename_ = dataTop_ + canFilename;
     }
   }

std::string FileInPath::relativePath ( ) const

Return a string containing the canonical form of the relative path. DO NOT USE THIS AS THE FILENAME for any file operations; use fullPath() for that purpose.

Definition at line 152 of file FileInPath.cc.

References relativePath_.

Referenced by BOOST_PYTHON_MODULE(), FWPSetTableManager::handleEntry(), and edm::operator==().

   {
     return relativePath_;
   }

void FileInPath::swap ( FileInPath & other )

Definition at line 140 of file FileInPath.cc.

References canonicalFilename_, dataTop_, localTop_, location_, relativePath_, releaseTop_, searchPath_, and std::swap().

Referenced by operator=(), and edm::swap().

   {
     relativePath_.swap(other.relativePath_);
     canonicalFilename_.swap(other.canonicalFilename_);
     std::swap(location_, other.location_);
     localTop_.swap(other.localTop_);
     releaseTop_.swap(other.releaseTop_);
     dataTop_.swap(other.dataTop_);
     searchPath_.swap(other.searchPath_);
   }

void FileInPath::write ( std::ostream & os ) const

Write contents to the given ostream. Writing errors are reflected in the state of the stream.

Definition at line 171 of file FileInPath.cc.

References canonicalFilename_, dataTop_, edm::hlt::Exception, edm::errors::FileInPathError, Local, localTop_, location_, relativePath_, Release, releaseTop_, Unknown, and BeamSplash_cfg::version.

Referenced by pkg.AbstractPkg::generate(), and edm::operator<<().

   {
     if (location_ == Unknown) {
       os << version << ' ' << relativePath_ << ' ' << location_;
     } else if (location_ == Local) {
       // Guarantee a site independent value by stripping $LOCALTOP.
       if (localTop_.empty()) {
     throw edm::Exception(edm::errors::FileInPathError)
       << "Environment Variable " 
       << LOCALTOP
       << " is not set.\n";
       }
       std::string::size_type pos = canonicalFilename_.find(localTop_);
       if (pos != 0) {
     throw edm::Exception(edm::errors::FileInPathError)
       << "Path " 
       << canonicalFilename_
       << " is not in the local release area "
       << localTop_
       << "\n";
       }
       os << version << ' ' << relativePath_ << ' ' << location_ << ' ' << canonicalFilename_.substr(localTop_.size());
     } else if (location_ == Release) {
       // Guarantee a site independent value by stripping $RELEASETOP.
       if (releaseTop_.empty()) {
     throw edm::Exception(edm::errors::FileInPathError)
       << "Environment Variable " 
       << RELEASETOP
       << " is not set.\n";
       }
       std::string::size_type pos = canonicalFilename_.find(releaseTop_);
       if (pos != 0) {
     throw edm::Exception(edm::errors::FileInPathError)
       << "Path " 
       << canonicalFilename_
       << " is not in the base release area "
       << releaseTop_
       << "\n";
       }
       os << version << ' ' << relativePath_ << ' ' << location_ << ' ' << canonicalFilename_.substr(releaseTop_.size());
     } else if (location_ == Data) {
       // Guarantee a site independent value by stripping $DATATOP.
       if (dataTop_.empty()) {
     throw edm::Exception(edm::errors::FileInPathError)
       << "Environment Variable " 
       << DATATOP
       << " is not set.\n";
       }
       std::string::size_type pos = canonicalFilename_.find(dataTop_);
       if (pos != 0) {
     throw edm::Exception(edm::errors::FileInPathError)
       << "Path " 
       << canonicalFilename_
       << " is not in the data area "
       << dataTop_
       << "\n";
       }
       os << version << ' ' << relativePath_ << ' ' << location_ << ' ' << canonicalFilename_.substr(dataTop_.size());
     }
   }