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#ifndef DataFormats_Provenance_ProductID_h
#define DataFormats_Provenance_ProductID_h
/*----------------------------------------------------------------------
ProductID: A unique identifier for each WrapperBase within a process.
Used only in Ref, Ptr, and similar classes.
The high order 16 bits is the process index, identifying the process
in which the product was created. Exception: An index of 0 means that
the product was created prior to the new format (i.e. prior to CMSSW_3_0_0.
The low order 16 bits is the product index, identifying the product that
in which the product was created. An index of zero means no product.
The
----------------------------------------------------------------------*/
#include <iosfwd>
namespace edm {
typedef unsigned short ProcessIndex;
typedef unsigned short ProductIndex;
class ProductID {
public:
ProductID() : processIndex_(0), productIndex_(0) {}
explicit ProductID(ProductIndex prodIndex) : processIndex_(0), productIndex_(prodIndex) {}
ProductID(ProcessIndex procIndex, ProductIndex prodIndex) : processIndex_(procIndex), productIndex_(prodIndex) {}
bool isValid() const { return productIndex_ != 0; }
ProcessIndex processIndex() const { return processIndex_; }
ProcessIndex productIndex() const { return productIndex_; }
ProductIndex id() const { return productIndex_; } // backward compatibility
void reset() { processIndex_ = productIndex_ = 0; }
void swap(ProductID& other);
private:
ProcessIndex processIndex_;
ProductIndex productIndex_;
};
inline void swap(ProductID& a, ProductID& b) { a.swap(b); }
inline bool operator==(ProductID const& lh, ProductID const& rh) {
return lh.processIndex() == rh.processIndex() && lh.productIndex() == rh.productIndex();
}
inline bool operator!=(ProductID const& lh, ProductID const& rh) { return !(lh == rh); }
bool operator<(ProductID const& lh, ProductID const& rh);
std::ostream& operator<<(std::ostream& os, ProductID const& id);
} // namespace edm
#endif
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