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loizides |
1.1 |
//--------------------------------------------------------------------------------------------------
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bendavid |
1.3 |
// $Id: RefArray.h,v 1.2 2008/09/10 03:33:26 loizides Exp $
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loizides |
1.1 |
//
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// RefArray
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//
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// Implementation of a TRefArray using stack (and not heap) memory.
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// For various reasons, the array can not be written in split mode.
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// Maximum size of references is set to 1024 (but this could be
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// changed if there is need for it).
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//
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// Authors: C.Loizides, J.Bendavid
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//--------------------------------------------------------------------------------------------------
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loizides |
1.2 |
#ifndef MITANA_DATACONT_REFARRAY
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#define MITANA_DATACONT_REFARRAY
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loizides |
1.1 |
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#include <TObject.h>
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#include <TRefArray.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/Collection.h"
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namespace mithep
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{
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template<class ArrayElement>
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class RefArray : public Collection<ArrayElement>
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{
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public:
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RefArray();
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~RefArray() { fProcID = 0; }
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void Add(ArrayElement *ae);
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ArrayElement *At(UInt_t idx);
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const ArrayElement *At(UInt_t idx) const;
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void Clear(Option_t */*opt*/="") { fProcID = 0;}
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UInt_t Entries() const { return GetEntries(); }
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UInt_t GetEntries() const { return fSize; }
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Bool_t IsOwner() const { return kTRUE; }
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void Reset() { fSize = 0; }
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void Trim() {}
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ArrayElement *UncheckedAt(UInt_t idx);
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const ArrayElement *UncheckedAt(UInt_t idx) const;
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ArrayElement *operator[](UInt_t idx);
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const ArrayElement *operator[](UInt_t idx) const;
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protected:
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TObject *GetObject(UInt_t idx) const;
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UInt_t GetUID(UInt_t idx) const;
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TProcessID *fProcID; //!ptr to Process Unique Identifier
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UShort_t fSize; //size of array
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UInt_t fUIDs[1024]; //storage of uids of referenced objects
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ClassDefT(RefArray,1) // Implementation of our own TRefArray
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};
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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inline mithep::RefArray<ArrayElement>::RefArray() :
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fProcID(TProcessID::GetSessionProcessID()),
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fSize(0)
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{
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// Default constructor.
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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void mithep::RefArray<ArrayElement>::Add(ArrayElement *ae)
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{
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// Add new reference to object.
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if(fSize>=1024) {
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Fatal("Add", "Maximum number of references reached: To support more requires change in code!");
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return;
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}
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// check if the object can belong here and assign or get its uid
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UInt_t uid = 0;
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if (ae->TestBit(kHasUUID)) {
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Error("Add", "Object can not be added as it has not UUID!");
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return;
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}
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if (ae->TestBit(kIsReferenced)) {
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uid = ae->GetUniqueID();
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if (fProcID != TProcessID::GetProcessWithUID(uid,ae)) {
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Error("Add", "Object can not be added as it has a different process id!");
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return;
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}
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} else {
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if (fProcID != TProcessID::GetSessionProcessID()) {
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Error("Add", "Object can not be added as it has a different process id!");
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return;
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}
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uid = TProcessID::AssignID(ae);
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}
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fUIDs[fSize] = uid;
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++fSize;
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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inline ArrayElement *mithep::RefArray<ArrayElement>::At(UInt_t idx)
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{
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// Return entry at given index.
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if(idx<fSize)
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return static_cast<ArrayElement*>(GetObject(idx));
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Error("At", "Given index (%ud) is larger than array size (%ud)", idx, fSize);
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return 0;
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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inline const ArrayElement *mithep::RefArray<ArrayElement>::At(UInt_t idx) const
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{
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// Return entry at given index.
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if(idx<fSize)
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return static_cast<const ArrayElement*>(GetObject(idx));
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Error("At", "Given index (%ud) is larger than array size (%ud)", idx, fSize);
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return 0;
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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TObject *mithep::RefArray<ArrayElement>::GetObject(UInt_t idx) const
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{
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// Return entry at given index. Code adapted from TRef::GetObject().
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if (!fProcID) {
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Error("GetObject","Process id pointer is null!");
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return 0;
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}
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if (!TProcessID::IsValid(fProcID)) {
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Error("GetObject","Process id is invalid!");
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return 0;
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}
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UInt_t uid = GetUID(idx);
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//the reference may be in the TRefTable
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TRefTable *table = TRefTable::GetRefTable();
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if (table) {
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table->SetUID(uid, fProcID);
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table->Notify();
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}
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//try to find the object from the table of the corresponding PID
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TObject *obj = fProcID->GetObjectWithID(uid);
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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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inline UInt_t mithep::RefArray<ArrayElement>::GetUID(UInt_t idx) const
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{
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// Return uid corresponding to idx.
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return fUIDs[idx];
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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inline const ArrayElement *mithep::RefArray<ArrayElement>::operator[](UInt_t idx) const
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{
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// Return entry at given index.
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return At(idx);
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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inline ArrayElement *mithep::RefArray<ArrayElement>::operator[](UInt_t idx)
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{
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// Return entry at given index.
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return At(idx);
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}
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//-------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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void mithep::RefArray<ArrayElement>::Streamer(TBuffer &b)
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{
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// Stream all objects in the array to or from the I/O buffer.
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if (b.IsReading()) {
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//UInt_t sv, cv;
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//b.ReadVersion(&sv, &cv);
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//TObject::Streamer(b);
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b >> fSize;
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if (fSize) {
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UShort_t pidf;
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b >> pidf;
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pidf += b.GetPidOffset();
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fProcID = b.ReadProcessID(pidf);
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b.ReadFastArray(fUIDs,fSize);
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}
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//b.CheckByteCount(sv, cv, RefArray::IsA());
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} else { /*writing*/
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//UInt_t cv;
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//cv = b.WriteVersion(RefArray::IsA(), kTRUE);
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//TObject::Streamer(b);
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b << fSize;
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if (fSize) {
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UShort_t pidf;
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pidf = b.WriteProcessID(fProcID);
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b << pidf;
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b.WriteFastArray(fUIDs,fSize);
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}
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//b.SetByteCount(cv, kTRUE);
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}
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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inline ArrayElement *mithep::RefArray<ArrayElement>::UncheckedAt(UInt_t idx)
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{
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// Return entry at given index.
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return static_cast<ArrayElement*>(GetObject(idx));
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}
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//--------------------------------------------------------------------------------------------------
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template<class ArrayElement>
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inline const ArrayElement *mithep::RefArray<ArrayElement>::UncheckedAt(UInt_t idx) const
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{
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// Return entry at given index.
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return static_cast<const ArrayElement*>(GetObject(idx));
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}
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#endif
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