/data/refman/pasoursint/CMSSW_4_4_5_patch3/src/DataFormats/Provenance/src/EntryDescription.cc

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#include "DataFormats/Provenance/interface/EntryDescription.h"
#include "FWCore/Utilities/interface/Digest.h"
#include <ostream>
#include <sstream>

/*----------------------------------------------------------------------

----------------------------------------------------------------------*/

namespace edm {
  EntryDescription::EntryDescription() :
    parents_(),
    moduleDescriptionID_()
  { }

  EntryDescriptionID
  EntryDescription::id() const
  {
    // This implementation is ripe for optimization.
    std::ostringstream oss;
    oss << moduleDescriptionID_ << ' ';
    for (std::vector<ProductID>::const_iterator 
           i = parents_.begin(),
           e = parents_.end();
         i != e;
         ++i)
      {
        oss << *i << ' ';
      }
    
    std::string stringrep = oss.str();
    cms::Digest md5alg(stringrep);
    return EntryDescriptionID(md5alg.digest().toString());
  }


  void
  EntryDescription::write(std::ostream&) const {
    // This is grossly inadequate, but it is not critical for the
    // first pass.
  }
}