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#include "DataFormats/Common/interface/RefCoreStreamer.h"
#include "DataFormats/Common/interface/RefCore.h"
#include "DataFormats/Common/interface/RefCoreWithIndex.h"
#include "FWCore/Utilities/interface/EDMException.h"
#include "DataFormats/Common/interface/EDProductGetter.h"
#include "DataFormats/Provenance/interface/ProductID.h"
#include "TBuffer.h"
#include "TClass.h"
namespace edm {
/*NOTE: This design came from Philippe Canal as the minimum storage (2bytes) we can do but still
have ROOT call our custom streamer. The trick is to only store the version # and not the class ID.
The '#if #else #endif' are there because the default choice is known to work for root 5.27-5.28 and
Philippe believes is unlikely to ever change but the alternate choice is slightly slower but more
guaranteed to be forwards compatible.
*/
void RefCoreStreamer::operator()(TBuffer& R__b, void* objp) {
if (R__b.IsReading()) {
cl_->ReadBuffer(R__b, objp);
} else {
//If transient, throw
RefCore* obj = static_cast<RefCore*>(objp);
if (obj->isTransient()) {
throw Exception(errors::InvalidReference, "Inconsistency")
<< "RefCoreStreamer: transient Ref or Ptr cannot be made persistent.";
}
#if 1
R__b << cl_->GetClassVersion();
#else
R__b.WriteVersion(cl_, kFALSE);
#endif
//Must match the order the data appears in the class declaration
const ProductID& id = obj->id();
R__b << id.processIndex();
R__b << id.productIndex();
}
}
void RefCoreWithIndexStreamer::operator()(TBuffer& R__b, void* objp) {
if (R__b.IsReading()) {
cl_->ReadBuffer(R__b, objp);
} else {
//If transient, throw
RefCoreWithIndex* obj = static_cast<RefCoreWithIndex*>(objp);
if (obj->isTransient()) {
throw Exception(errors::InvalidReference, "Inconsistency")
<< "RefCoreStreamer: transient Ref or Ptr cannot be made persistent.";
}
#if 1
R__b << cl_->GetClassVersion();
#else
R__b.WriteVersion(cl_, kFALSE);
#endif
//Must match the order the data appears in the class declaration
const ProductID& id = obj->id();
R__b << id.processIndex();
R__b << id.productIndex();
R__b << obj->index();
}
}
TClassStreamer* RefCoreStreamer::Generate() const { return new RefCoreStreamer(*this); }
TClassStreamer* RefCoreWithIndexStreamer::Generate() const { return new RefCoreWithIndexStreamer(*this); }
void setRefCoreStreamerInTClass() {
{
TClass* tClass = TClass::GetClass("edm::RefCore");
if (tClass->GetStreamer() == nullptr) {
tClass->AdoptStreamer(new RefCoreStreamer());
}
}
{
TClass* tClass = TClass::GetClass("edm::RefCoreWithIndex");
if (tClass->GetStreamer() == nullptr) {
tClass->AdoptStreamer(new RefCoreWithIndexStreamer());
}
}
}
void setRefCoreStreamer(bool) { EDProductGetter::switchProductGetter(nullptr); }
EDProductGetter const* setRefCoreStreamer(EDProductGetter const* ep) {
EDProductGetter const* returnValue = nullptr;
if (ep != nullptr) {
returnValue = edm::EDProductGetter::switchProductGetter(ep);
}
return returnValue;
}
} // namespace edm
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