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//--------------------------------------------------------------------------------------------------
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// $Id: Ref.h,v 1.7 2010/09/19 23:46:08 bendavid Exp $
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//
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// Ref
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//
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// Templated implementation of our own TRef.
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//
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// Authors: J.Bendavid
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//--------------------------------------------------------------------------------------------------
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#ifndef MITANA_DATACONT_REF_H
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#define MITANA_DATACONT_REF_H
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#include <TObject.h>
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#include <TRefTable.h>
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#include <TProcessID.h>
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#include <TError.h>
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#include "MitAna/DataCont/interface/RefResolver.h"
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#include "MitAna/DataCont/interface/ProcIDRef.h"
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namespace mithep
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{
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template<class ArrayElement>
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class Ref
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{
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public:
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Ref() : fPID(0), fUID(0) {}
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Ref(const ArrayElement *ae) { SetObject(ae); }
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virtual ~Ref() {}
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Bool_t IsNull() const { return fUID==0 ? kTRUE : kFALSE; }
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Bool_t IsValid() const { return !IsNull(); }
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const ArrayElement *Obj() const;
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ArrayElement *Obj();
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Bool_t RefsObject(const ArrayElement *ae) const;
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void SetObject(const ArrayElement *ae);
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void operator= (const ArrayElement *ae) { SetObject(ae); }
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Bool_t operator==(const ArrayElement *ae) { return RefsObject(ae); }
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protected:
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TObject *GetObject() const;
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ProcIDRef fPID; //||process id corresponding to referenced object
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UInt_t fUID; //unique id of the referenced object
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ClassDef(Ref, 1) // Templated implementation of our own TRef
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};
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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TObject *mithep::Ref<ArrayElement>::GetObject() const
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{
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// Return pointer to object. Code adapted from TRef::GetObject().
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if (IsNull())
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return 0;
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TProcessID *pid = fPID.Pid();
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if (!pid) {
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Fatal("GetObject","Process id pointer is null!");
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return 0;
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}
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if (!TProcessID::IsValid(pid)) {
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Fatal("GetObject","Process id is invalid!");
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return 0;
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}
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TObject *obj = RefResolver::GetObjectWithID(fUID,pid);
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if (!obj) {
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Fatal("Ref::GetObject","Null pointer for valid ref!");
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}
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return obj;
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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const ArrayElement *mithep::Ref<ArrayElement>::Obj() const
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{
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// Return entry at given index. Code adapted from TRef::GetObject().
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return reinterpret_cast<const ArrayElement*>(GetObject());
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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ArrayElement *mithep::Ref<ArrayElement>::Obj()
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{
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// Return entry at given index. Code adapted from TRef::GetObject().
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return reinterpret_cast<ArrayElement*>(GetObject());
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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Bool_t mithep::Ref<ArrayElement>::RefsObject(const ArrayElement *ae) const
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{
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// Check whether Ref points to given object.
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if (IsNull())
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return kFALSE;
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const TObject *oe = reinterpret_cast<const TObject*>(ae);
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if (!oe->TestBit(kIsReferenced))
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return kFALSE;
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UInt_t oUid = oe->GetUniqueID();
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TProcessID *oPid = TProcessID::GetProcessWithUID(oUid, const_cast<TObject*>(oe));
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if (!oPid)
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return kFALSE;
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if ( (fUID&0xffffff)!=(oUid&0xffffff) || fPID.Pid()->GetUniqueID()!=oPid->GetUniqueID())
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return kFALSE;
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return kTRUE;
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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void mithep::Ref<ArrayElement>::SetObject(const ArrayElement *ae)
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{
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// Set reference to object.
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if (!ae)
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return;
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const TObject *oe = reinterpret_cast<const TObject*>(ae);
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// check if the object can belong here and assign or get its uid
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if (oe->TestBit(kHasUUID)) {
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Fatal("Add", "Object cannot be added as it has not UUID!");
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return;
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}
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if (oe->TestBit(kIsReferenced)) {
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fUID = oe->GetUniqueID();
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fPID.SetPid(TProcessID::GetProcessWithUID(fUID, const_cast<TObject*>(oe)));
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} else {
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fPID.SetPid(TProcessID::GetSessionProcessID());
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fUID = TProcessID::AssignID(const_cast<TObject*>(oe));
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}
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}
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#endif
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