Implment NexusFileLoader class

Signed-off-by: Steven Hahn <hahnse@ornl.gov>

Framework/DataHandling/inc/MantidDataHandling/NexusFileLoader.h

@@ -16,12 +16,14 @@ class DLLExport NexusFileLoader
     : public API::IFileLoader<Mantid::Kernel::NexusHDF5Descriptor> {
 public:
   void exec() override;
+  virtual void execLoader();
   boost::shared_ptr<Algorithm> createChildAlgorithm(
       const std::string &name, const double startProgress = -1.,
       const double endProgress = -1., const bool enableLogging = true,
       const int &version = -1) override;
-  void
+  virtual void
   setFileInfo(std::shared_ptr<Mantid::Kernel::NexusHDF5Descriptor> fileInfo);
+
 private:
   std::shared_ptr<Mantid::Kernel::NexusHDF5Descriptor> m_fileInfo;
 };

Framework/DataHandling/src/NexusFileLoader.cpp

@@ -7,14 +7,22 @@
 #include "MantidDataHandling/NexusFileLoader.h"
 
 namespace Mantid::DataHandling {
-  void NexusFileLoader::exec() {}
-  boost::shared_ptr<Mantid::API::Algorithm>
-  NexusFileLoader::createChildAlgorithm(const std::string &name,
-                                        const double startProgress,
-                                        const double endProgress,
-                                        const bool enableLogging,
-                                        const int &version) {
-    return nullptr;
+void NexusFileLoader::exec() { execLoader(); }
+void NexusFileLoader::execLoader() {}
+boost::shared_ptr<Mantid::API::Algorithm> NexusFileLoader::createChildAlgorithm(
+    const std::string &name, const double startProgress,
+    const double endProgress, const bool enableLogging, const int &version) {
+  auto child = API::IFileLoader<
+      Mantid::Kernel::NexusHDF5Descriptor>::createChildAlgorithm(name,
+                                                                 startProgress,
+                                                                 endProgress,
+                                                                 enableLogging,
+                                                                 version);
+  auto nfl = boost::dynamic_pointer_cast<NexusFileLoader>(child);
+  if (nfl) {
+    nfl->setFileInfo(m_fileInfo);
+  }
+  return child;
   }
   void NexusFileLoader::setFileInfo(
       std::shared_ptr<Mantid::Kernel::NexusHDF5Descriptor> fileInfo) {