Buffered Reader problem

[pradeep.theonlyone]

hi,

I am trying to read a file twice. The sample code is as follows:

BufferredReader fileReader = new BufferedReader(new FileReader("abc.txt"));	
	if(CiscoTraceRouteParser.canParse(fileReader))
	{
               // Do Something
	}
	else if(JuniperTraceRouteParser.canParse(fileReader))
	{
		// Do something else
	}

The canParse methods are of the type

public static boolean canParse(BufferredReader fileReader)
{
  while((line == fileReader.readLine()) != null)
  {
      if(some condition satisfied for the line)
              return true;
  }

  return false;
}

The problem is if the first 'if' check fails, then we have to do the second if check which when has to readLine from the first line of the same file. This is failing. I tried to mark and then do a reset , but not able to get the pointer reset to the begining of the file second time around.

Please help me out with this. Thansk!

Pradeep

[pushdown]

i think making some changes as in the following solves the problem:

FileReader fileReader = new FileReader("abc.txt");
	
	if(CiscoTraceRouteParser.canParse(new BufferedReader(fileReader)))
	{
               // Do Something
	}
	else if(JuniperTraceRouteParser.canParse(new BufferedReader(fileReader)))
	{
		// Do something else
	}

[pradeep.theonlyone]

Thanks pushdown!
It solves the problem. Looks like I cant use the same bufferredreader every time in the loop. Will use this for the time being.

Regards,
Pradeep

[pushdown]

Thanks pushdown!
It solves the problem. Looks like I cant use the same bufferredreader every time in the loop. Will use this for the time being.

Regards,
Pradeep

If BufferReader had a method which can be move the cursor to the beginning, then we could use same BufferReader object with moving cursor beginning, just before calling canParse func. but unfortunately it has not such method. Thus, we have to renew the reader object so that it can provide reading from beginning.