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# EventCollectionSelector.cpp

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    00001 //$Id: EventCollectionSelector.cpp,v 1.16 2007/01/09 16:54:47 hmd Exp $
    00002
    00003 // Include files
    00004 #include "GaudiKernel/SmartIF.h"
    00005 #include "GaudiKernel/SvcFactory.h"
    00006 #include "GaudiKernel/ObjectFactory.h"
    00007 #include "GaudiKernel/GenericAddress.h"
    00008 #include "GaudiKernel/MsgStream.h"
    00009 #include "GaudiKernel/IRegistry.h"
    00010 #include "GaudiKernel/INTupleSvc.h"
    00011 #include "GaudiKernel/ISvcLocator.h"
    00012 #include "GaudiKernel/IDataSourceMgr.h"
    00013 #include "GaudiKernel/IAddressCreator.h"
    00014 #include "GaudiKernel/ISelectStatement.h"
    00015 #include "GaudiKernel/NTuple.h"
    00016 #include "GaudiKernel/EventSelectorDataStream.h"
    00017
    00018 #include "EventCollectionSelector.h"
    00019
    00020 #include <memory>
    00021
    00022 DECLARE_SERVICE_FACTORY(EventCollectionSelector)
    00023
    00024
    00029 class EventCollectionContext : public IEvtSelector::Context {
    00030 public:
    00031   typedef std::list<std::string> ListName;
    00032 private:
    00033   GenericAddress*                m_pAddressBuffer;
    00034   const EventCollectionSelector* m_pSelector;
    00035   ListName                      m_files;
    00036   std::string                   m_criteria;
    00037   ListName::const_iterator      m_fileIterator;
    00038   std::string                   m_currentInput;
    00039
    00040 public:
    00042   EventCollectionContext(const EventCollectionSelector* pSelector);
    00044   virtual ~EventCollectionContext();
    00045   const std::string& currentInput() const {
    00046     return m_currentInput;
    00047   }
    00048   void setCurrentInput(const std::string& v) {
    00049     m_currentInput = v;
    00050   }
    00051   ListName& files() {
    00052     return m_files;
    00053   }
    00054   virtual void* identifier() const {
    00055     return (void*)m_pSelector;
    00056   }
    00057   void setCriteria(const std::string& crit) {
    00058     m_criteria = crit;
    00059   }
    00060   ListName::const_iterator fileIterator()        {
    00061     return m_fileIterator;
    00062   }
    00063   void setFileIterator(ListName::const_iterator new_iter)
    00064   {  m_fileIterator = new_iter;   }
    00065 };
    00066
    00067 EventCollectionContext::~EventCollectionContext() {
    00068   m_pAddressBuffer->release();
    00069 }
    00070
    00071 EventCollectionContext::EventCollectionContext(const EventCollectionSelector* pSelector)
    00072   : m_pSelector(pSelector)
    00073 {
    00074   m_pAddressBuffer = new GenericAddress();
    00075   m_pAddressBuffer->addRef();
    00076 }
    00077
    00078 // Standard constructor
    00079 EventCollectionSelector::EventCollectionSelector(const std::string& name, ISvcLocator* svcloc )
    00080   : Service( name, svcloc), m_tupleSvc(0)
    00081 {
    00082   m_pAddrCreator = 0;
    00083   declareProperty("CnvService",    m_tupleSvcName = "EvtTupleSvc");
    00084   declareProperty("Authentication",m_authentication= "");
    00085   declareProperty("Container",     m_cntName  = "B2PiPi");
    00086   declareProperty("Item",          m_itemName = "Address");
    00087   declareProperty("Criteria",      m_criteria = "");
    00088   declareProperty("DB",            m_database = "");
    00089   declareProperty("DbType",        m_dbType   = "");
    00090   declareProperty("Function",      m_statement= "NTuple::Selector");
    00091 }
    00092
    00093 EventCollectionSelector::~EventCollectionSelector()   {
    00094 }
    00095
    00096 // IService implementation: Db event selector override
    00097 StatusCode EventCollectionSelector::initialize()    {
    00098   // Initialize base class
    00099   StatusCode status = Service::initialize();
    00100   MsgStream log(messageService(), name());
    00101   if ( !status.isSuccess() )    {
    00102     log << MSG::ERROR << "Error initializing base class Service!" << endreq;
    00103     return status;
    00104   }
    00105   status = serviceLocator()->service("EventPersistencySvc", m_pAddrCreator, true );
    00106   if( !status.isSuccess() )   {
    00107     log << MSG::ERROR << "Unable to locate IAddressCreator interface of " << "EventPersistencySvc" << endreq;
    00108     return status;
    00109   }
    00110   status = serviceLocator()->service(m_tupleSvcName, m_tupleSvc, true );
    00111   if( !status.isSuccess() )   {
    00112     log << MSG::ERROR << "Unable to locate INTupleSvc interface of " << m_tupleSvcName << endreq;
    00113     return status;
    00114   }
    00115   return status;
    00116 }
    00117
    00118 // Connect collection to selector
    00119 StatusCode
    00120 EventCollectionSelector::connectDataSource(const std::string& db, const std::string& /* typ */ )  const {
    00121   StatusCode status = StatusCode::FAILURE;
    00122   SmartIF<IDataSourceMgr> svc(IID_IDataSourceMgr, m_tupleSvc);
    00123   if ( svc.isValid( ) && db.length() > 0 )   {
    00124     std::string ident = name() + ' ';
    00125     ident += "DATAFILE='" + m_database.substr(5,m_database.length()) + "' ";
    00126     ident += "TYP='" + m_dbType + "' ";
    00127     ident += "OPT='READ' ";
    00128     if ( m_authentication.length() > 0 )    {
    00129       ident += "AUTH='" + m_authentication + "' ";
    00130     }
    00131     status = svc->connect(ident);
    00132   }
    00133   return status;
    00134 }
    00135
    00137 StatusCode
    00138 EventCollectionSelector::connectTuple(const std::string& nam, const std::string& itName, NTuple::Tuple*& tup, NTuple::Item<IOpaqueAddress*>*& item)  const {
    00139   std::string top = "/NTUPLES/" + name() + '/' + nam;
    00140   StatusCode status = m_tupleSvc->retrieveObject(top, (DataObject*&)tup);
    00141   if ( status.isSuccess() )    {
    00142     item = new NTuple::Item<IOpaqueAddress*>();
    00143     status = tup->item(itName, *item);
    00144     if ( status.isSuccess() )   {
    00145       return status;
    00146     }
    00147     else    {
    00148       MsgStream log(msgSvc(), name());
    00149       log << MSG::ERROR << "Item " << itName << " is not part of the collection:" << top << endreq;
    00150     }
    00151     delete item;
    00152     item = 0;
    00153   }
    00154   else  {
    00155     MsgStream err(msgSvc(), name());
    00156     err << MSG::ERROR << "Cannot connect to collection:" << top << endreq;
    00157   }
    00158   tup = 0;
    00159   return status;
    00160 }
    00161
    00163 StatusCode
    00164 EventCollectionSelector::connectStatement(const std::string& typ, const std::string& crit, INTuple* tuple)  const {
    00165   std::string seltyp = typ;
    00166   if ( seltyp.length() > 0 || crit.length() > 0 )   {
    00167     if ( crit.length() > 0 && seltyp.length() == 0 ) seltyp = "NTuple::Selector";
    00168     SmartIF<ISelectStatement> stmt(IID_ISelectStatement,
    00169       ROOT::Reflex::PluginService::Create<IInterface*>(seltyp, (IInterface*)serviceLocator()));
    00170     if ( stmt.isValid( ) )    {
    00171       if ( crit.length() > 0 ) stmt->setCriteria(crit);
    00172       tuple->attachSelector(stmt).ignore();
    00173       return StatusCode::SUCCESS;
    00174     }
    00175     return StatusCode::FAILURE;
    00176   }
    00177   return StatusCode::SUCCESS;
    00178 }
    00179
    00181 StatusCode EventCollectionSelector::getNextRecord(NTuple::Tuple* tuple)   const {
    00182   StatusCode status = StatusCode::FAILURE;
    00183   if ( 0 != tuple )   {
    00184     do {
    00185       status = m_tupleSvc->readRecord(tuple);
    00186       if ( status.isSuccess() )   {
    00187         ISelectStatement* statement = tuple->selector();
    00188         bool use_it = (statement) ? (*statement)(tuple) : true;
    00189         if ( use_it )   {
    00190           return status;
    00191         }
    00192       }
    00193     } while ( status.isSuccess() );
    00194   }
    00195   return status;
    00196 }
    00197
    00199 StatusCode EventCollectionSelector::getPreviousRecord(NTuple::Tuple* tuple )  const  {
    00200   StatusCode status = StatusCode::FAILURE;
    00201   if ( tuple )  {
    00202     IRegistry* pReg = tuple->registry();
    00203     if ( pReg )  {
    00204       IOpaqueAddress* pAddr = pReg->address();
    00205       if ( pAddr )  {
    00206         long* ip = (long*)pAddr->ipar();
    00207         do {
    00208           if ( ip[1] > 1 )  {
    00209             ip[1] -= 2;
    00210             status = m_tupleSvc->readRecord(tuple);
    00211             if ( status.isSuccess() )   {
    00212               ISelectStatement* statement = tuple->selector();
    00213               bool use_it = (statement) ? (*statement)(tuple) : true;
    00214               if ( use_it )   {
    00215                 return status;
    00216               }
    00217             }
    00218           }
    00219           else  {
    00220             return StatusCode::FAILURE;
    00221           }
    00222         } while ( status.isSuccess() );
    00223       }
    00224     }
    00225   }
    00226   return StatusCode::FAILURE;
    00227 }
    00228
    00229 // Connect collection to selector
    00230 StatusCode EventCollectionSelector::connectCollection(MyContextType* ctxt) const
    00231 {
    00232   if ( ctxt )  {
    00233     StatusCode status = connectDataSource(m_database, m_dbType);
    00234     if ( status.isSuccess() )   {
    00235       status = connectTuple(m_cntName, m_itemName, ctxt->tuple, ctxt->item);
    00236       if ( status.isSuccess() )   {
    00237         status = connectStatement(m_statement, m_criteria, ctxt->tuple);
    00238         if ( status.isSuccess() )   {
    00239           *(ctxt->item) = 0;
    00240           return status;
    00241         }
    00242       }
    00243     }
    00244     return status;
    00245   }
    00246   return StatusCode::FAILURE;
    00247 }
    00248
    00249 // Finalize service
    00250 StatusCode EventCollectionSelector::finalize()    {
    00251   if ( m_pAddrCreator )  {
    00252     m_pAddrCreator->release();
    00253     m_pAddrCreator = 0;
    00254   }
    00255   if ( m_tupleSvc )  {
    00256     m_tupleSvc->release();
    00257     m_tupleSvc = 0;
    00258   }
    00259   return Service::finalize();
    00260 }
    00261
    00263 StatusCode
    00264 EventCollectionSelector::createContext(Context*& refpCtxt) const
    00265 {
    00266   refpCtxt = 0;
    00267   std::auto_ptr<MyContextType> ctxt(new MyContextType());
    00268   StatusCode status = connectCollection(ctxt.get());
    00269   if( !status.isSuccess() )  {
    00270     MsgStream log(msgSvc(), name());
    00271     log << MSG::ERROR << "Unable to connect Collection file \"" << m_database << "\"" << endreq;
    00272     return status;
    00273   }
    00274   refpCtxt = ctxt.release();
    00275   return StatusCode::SUCCESS;
    00276 }
    00277
    00279 StatusCode
    00280 EventCollectionSelector::next(Context& refCtxt) const
    00281 {
    00282   return next(refCtxt, 1);
    00283 }
    00284
    00286 StatusCode
    00287 EventCollectionSelector::next(Context& refCtxt,int jump) const
    00288 {
    00289   MyContextType *ctxt  = dynamic_cast<MyContextType*>(&refCtxt);
    00290   if ( ctxt )    {
    00291     *(ctxt->item) = ctxt->addressBuffer;
    00292     StatusCode sc = StatusCode::SUCCESS;
    00293     for ( int i=0; i<jump && sc.isSuccess(); ++i ) {
    00294       sc = getNextRecord(ctxt->tuple);
    00295     }
    00296     return sc;
    00297   }
    00298   return StatusCode::FAILURE;
    00299 }
    00300
    00302 StatusCode
    00303 EventCollectionSelector::previous(Context& refCtxt) const
    00304 {
    00305   return previous(refCtxt, 1);
    00306 }
    00307
    00309 StatusCode
    00310 EventCollectionSelector::previous(Context& refCtxt,int jump) const
    00311 {
    00312   MyContextType *ctxt  = dynamic_cast<MyContextType*>(&refCtxt);
    00313   if ( ctxt )    {
    00314     *(ctxt->item) = ctxt->addressBuffer;
    00315     StatusCode sc = StatusCode::SUCCESS;
    00316     for ( int i=0; i<jump && sc.isSuccess(); ++i ) {
    00317       sc = getPreviousRecord(ctxt->tuple);
    00318     }
    00319     return sc;
    00320   }
    00321   return StatusCode::FAILURE;
    00322 }
    00323
    00325 StatusCode
    00326 EventCollectionSelector::rewind(Context& /* refCtxt */ ) const
    00327 {
    00328   return StatusCode::FAILURE;
    00329 }
    00330
    00332 StatusCode
    00333 EventCollectionSelector::createAddress(const Context& refCtxt, IOpaqueAddress*& refpAddr) const
    00334 {
    00335   const MyContextType* ctxt = dynamic_cast<const MyContextType*>(&refCtxt);
    00336   if ( ctxt )   {
    00337     IOpaqueAddress* pA = *(ctxt->item);
    00338     if ( pA )  {
    00339       IOpaqueAddress* pAddress = 0;
    00340       StatusCode status = m_pAddrCreator->createAddress(pA->svcType(),
    00341                                                         pA->clID(),
    00342                                                         pA->par(),
    00343                                                         pA->ipar(),
    00344                                                         pAddress);
    00345       if ( status.isSuccess() )   {
    00346         refpAddr = pAddress;
    00347         return StatusCode::SUCCESS;
    00348       }
    00349       else    {
    00350         MsgStream log(msgSvc(), name());
    00351         log << MSG::ERROR << "Failed to access " << pA->par()[0]
    00352             << ":" << pA->par()[1]
    00353             << " SvcTyp:" << long(pA->svcType())
    00354             << " CLID:"   << pA->clID()
    00355             << endreq;
    00356       }
    00357     }
    00358   }
    00359   return StatusCode::FAILURE;
    00360 }
    00361
    00363 StatusCode
    00364 EventCollectionSelector::releaseContext(Context*& refCtxt) const
    00365 {
    00366   MyContextType *ctxt  = dynamic_cast<MyContextType*>(refCtxt);
    00367   if ( ctxt )   {
    00368     delete ctxt;
    00369     ctxt = 0;
    00370     return StatusCode::SUCCESS;
    00371   }
    00372   return StatusCode::FAILURE;
    00373 }
    00374
    00377 StatusCode
    00378 EventCollectionSelector::resetCriteria(const std::string& cr,Context& refCtxt) const
    00379 {
    00380   MyContextType *ctxt  = dynamic_cast<MyContextType*>(&refCtxt);
    00381   if ( ctxt )   {
    00382     ctxt->criteria = cr;
    00383     return StatusCode::SUCCESS;
    00384   }
    00385   return StatusCode::FAILURE;
    00386 }
    00387
    00389 StatusCode
    00390 EventCollectionSelector::last(Context& /* refCtxt */ ) const
    00391 {
    00392   return StatusCode::FAILURE;
    00393 }
    00394
    00395 // Service override: queryInterface
    00396 StatusCode EventCollectionSelector::queryInterface(const InterfaceID& riid, void** ppvInterface)  {
    00397   if ( riid == IID_IEvtSelector )  {
    00398     *ppvInterface = (IEvtSelector*)this;
    00399     addRef();
    00400     return SUCCESS;
    00401   }
    00402   return Service::queryInterface( riid, ppvInterface );
    00403 }
    00404