start populating HDF4 header info.

src/classes/PRunDataHandler.cpp

@@ -2214,9 +2214,50 @@ Bool_t PRunDataHandler::ReadNexusFile()
       return false;
   }
 
+  PDoubleVector  histoData;
+  PRawRunData    runData;
+  PRawRunDataSet dataSet;
+  TString str;
+  std::string sstr;
+  Int_t ival;
+  Double_t dval;
+  bool ok;
+
   if (type == nxs::HDFType::HDF4) {
 #ifdef HAVE_HDF4
     std::unique_ptr<nxH4::PNeXus> nxs_file = std::make_unique<nxH4::PNeXus>(fRunPathName.Data());
+
+    // get header information
+
+    // get/set laboratory
+    sstr = "n/a";
+    if (nxs_file->HasDataset("/run/lab"))
+      sstr = nxs_file->GetDataset<std::string>("/run/lab").GetData()[0];
+    runData.SetLaboratory(sstr);
+
+    // get/set beamline
+    sstr = "n/a";
+    if (nxs_file->HasDataset("/run/beamline"))
+      sstr = nxs_file->GetDataset<std::string>("/run/beamline").GetData()[0];
+    runData.SetBeamline(sstr);
+
+    // get/set instrument
+    sstr = "n/a";
+    if (nxs_file->HasDataset("/run/instrument/name"))
+      sstr = nxs_file->GetDataset<std::string>("/run/instrument/name").GetData()[0];
+    runData.SetInstrument(sstr);
+
+    // get/set run title
+    str = "n/a";
+    if (nxs_file->HasDataset("/run/title"))
+      sstr = nxs_file->GetDataset<std::string>("/run/title").GetData()[0];
+    runData.SetRunTitle(sstr);
+
+    // get/set run number
+    ival = -1;
+    if (nxs_file->HasDataset("/run/number"))
+      ival = nxs_file->GetDataset<int>("/run/number").GetData()[0];
+    runData.SetRunNumber(ival);
 #endif
   } else { // HDF5
     std::unique_ptr<nxH5::PNeXus> nxs_file = std::make_unique<nxH5::PNeXus>(fRunPathName.Data());