/// <summary>
/// Handler open file dialog, creates stream and it's reader
/// </summary>
private void openFileDialog1_FileOk_1(object sender, CancelEventArgs e)
{
stream_container = new Streams_Container();
stream_container.stream_reader = Stream_controler.Create_Reader(openFileDialog1.FileName);
stream_container.base_stream = Stream_controler.Get_Base_Stream(stream_container.stream_reader);
stream_container.input_file_path = openFileDialog1.FileName;
stream_exists = true;
}
/*
* /// <summary>
* /// Iterates through whole file and counts number of lines in it (Resets stream to origin)
* /// </summary>
* public static int Get_line_lenght(Streams_Container s_container)
* {
* int lenght = 0;
*
* s_container = Move_Stream(s_container, (int)MoveMode.Start);
*
* while(s_container.stream_reader.ReadLine()!=null)
* {
* lenght++;
* }
*
* return lenght;
* }
*/
public static void Generate_log(Streams_Container sc, string filename)
{
StreamWriter sw = sc.stream_writer;
string line;
long length = new System.IO.FileInfo((sc.input_file_path)).Length;
sw.WriteLine("Big Data reader log");
sw.WriteLine("Filename: " + filename);
sw.WriteLine();
sw.WriteLine(length);
sw.WriteLine();
sw.WriteLine("First 20 lines: ");
sw.WriteLine();
Stream_controler.Move_Stream(sc, (int)MoveMode.Start);
for (int i = 0; i < 20; i++)
{
sw.WriteLine(sc.stream_reader.ReadLine());
}
sw.WriteLine();
sw.WriteLine("Last 20 lines: ");
sw.WriteLine();
Stream_controler.Move_Stream(sc, (int)MoveMode.End);
for (int i = 0; i < 20; i++)
{
line = sc.stream_reader.ReadLine();
if (line == null)
{
break;
}
sw.WriteLine(line);
}
sw.WriteLine();
sw.WriteLine("End of log");
sw.Flush();
sw.Close();
}
public static Streams_Container Move_Stream(Streams_Container s_container, int OperationType, int amount = 0)
{
switch (OperationType)
{
case (int)(MoveMode.Start):
s_container.base_stream.Seek(0, SeekOrigin.Begin);
s_container.stream_reader.DiscardBufferedData();
break;
case (int)(MoveMode.End):
long lenght = 0;
lenght = s_container.base_stream.Length;
s_container.base_stream.Seek(lenght - 100, SeekOrigin.Begin);
s_container.stream_reader.DiscardBufferedData();
break;
case (int)(MoveMode.Amount):
s_container.base_stream.Seek(amount, SeekOrigin.Current);
s_container.stream_reader.DiscardBufferedData();
break;
}
return(s_container);
}
