Add access to open NeXus file in HDFDescriptor. Refs #7263

Code/Mantid/Framework/Kernel/inc/MantidKernel/HDFDescriptor.h

@@ -77,6 +77,10 @@ namespace Mantid
        * @returns A reference to a const string containing the file extension
        */
       inline const std::string & extension() const { return m_extension; }
+      /**
+       * Access the open NeXus File object
+       */
+      inline ::NeXus::File & data() { return *m_file; }
 
       /// Returns the name & type of the first entry in the file
       const std::pair<std::string,std::string> & firstEntryNameType() const;
@@ -109,6 +113,9 @@ namespace Mantid
       std::set<std::string> m_rootAttrs;
       /// Map of full path strings to types. Can check if path exists quickly
       std::map<std::string, std::string> m_pathsToTypes;
+
+      /// Open NeXus handle
+      ::NeXus::File *m_file;
     };
 
 

Code/Mantid/Framework/Kernel/src/HDFDescriptor.cpp

@@ -99,7 +99,7 @@ namespace Mantid
      */
     HDFDescriptor::HDFDescriptor(const std::string & filename)
       : m_filename(), m_extension(), m_firstEntryNameType(),
-        m_rootAttrs(), m_pathsToTypes()
+        m_rootAttrs(), m_pathsToTypes(), m_file(NULL)
     {
       if(filename.empty())
       {
@@ -123,6 +123,7 @@ namespace Mantid
      */
     HDFDescriptor::~HDFDescriptor()
     {
+      delete m_file;
     }
 
     /// Returns the name & type of the first entry in the file
@@ -190,12 +191,12 @@ namespace Mantid
       m_filename = filename;
       m_extension = "." + Poco::Path(filename).getExtension();
 
-      ::NeXus::File file(this->filename());
+      m_file = new ::NeXus::File(this->filename());
 
-      file.openPath("/");
+      m_file->openPath("/");
       m_rootAttrs.clear();
       m_pathsToTypes.clear();
-      walkFile(file, "", "", m_pathsToTypes,0);
+      walkFile(*m_file, "", "", m_pathsToTypes,0);
     }
 
     /**

Code/Mantid/Framework/Kernel/test/HDFDescriptorTest.h

@@ -8,6 +8,7 @@
 #include <boost/make_shared.hpp>
 #include <boost/shared_ptr.hpp>
 
+#include <nexus/NeXusFile.hpp>
 #include <Poco/Path.h>
 #include <Poco/File.h>
 
@@ -105,6 +106,12 @@ public:
     TS_ASSERT_THROWS(HDFDescriptor fd(m_testNonHDFPath), std::invalid_argument);
   }
 
+  void test_File_Handle_Returned_By_Data_Is_Valid()
+  {
+    auto & file = m_testHDF5->data();
+    TS_ASSERT_EQUALS("", file.getPath())
+  }
+
   void test_firstEntryNameType_Returns_Correct_Details()
   {
     auto entryType = m_testHDF5->firstEntryNameType();