private static IScanResult ScanFile()

in Code_Sweep/C#/Scanner/Scanner.cs [130:184]
49 lines of code
14 McCabe index (conditional complexity)

        private static IScanResult ScanFile(string filePath, MatchFinder finder, FileContentGetter contentGetter, ScanStopper stopper)
        {
            if (filePath == null)
            {
                throw new ArgumentNullException("filePath");
            }

            // See if the content getter can give us the file contents.  If so, we'll scan that
            // string rather than loading the file from disk.
            if (contentGetter != null)
            {
                string content = contentGetter(filePath);
                if (content != null)
                {
                    return ScanResult.ScanOccurred(filePath, GetScanHits(filePath, content, finder, stopper));
                }
            }

            StreamReader reader = null;

            try
            {
                try
                {
                    reader = File.OpenText(filePath);
                }
                catch (Exception ex)
                {
                    if (ex is UnauthorizedAccessException ||
                        ex is ArgumentException ||
                        ex is ArgumentNullException ||
                        ex is PathTooLongException ||
                        ex is DirectoryNotFoundException ||
                        ex is FileNotFoundException ||
                        ex is NotSupportedException ||
                        ex is IOException)
                    {
                        return ScanResult.ScanNotPossible(filePath);
                    }
                    else
                    {
                        throw;
                    }
                }

                return ScanResult.ScanOccurred(filePath, GetScanHits(filePath, reader, finder, stopper));
            }
            finally
            {
                if (reader != null)
                {
                    reader.Close();
                }
            }
        }