private void _getFileInput()
{
var path = _fileInput.GetFileInput();
var extension = Path.GetExtension(path);
// Get input reader based on extension of given path
InputReaderFactory inputReaderFactory = new InputReaderFactory();
IInputReader inputReader = inputReaderFactory.GetInputReader(extension);
// Get node and edge list from input reader
inputReader.Read(path);
_nodes = inputReader.CreateNodeList();
_edges = inputReader.CreateEdgeList();
}