gps.log.in
Class WindowedFile

java.lang.Object
  gps.log.in.WindowedFile

public final class WindowedFile
extends java.lang.Object

This class copes with the inability of the VM to handle random access files when one wants to look at the file content using a forward moving window on the file. The new start position of the window must be at least the previous start position of the window. This class performs the required internal buffer copy and then required file read.

Author:

Mario De Weerd

Constructor Summary

WindowedFile(BT747Path path, int mode)

Method Summary

boolean	close()
byte[]	fillBuffer(int newPosition)
byte[]	getBuffer()
int	getBufferFill()
int	getBufferSize()
int	getLastError()
java.lang.String	getPath()
int	getSize()
boolean	isOpen()
void	setBufferSize(int bufferSize)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WindowedFile

public WindowedFile(BT747Path path,
                    int mode)
             throws java.lang.Exception

Throws:

java.lang.Exception

Method Detail

setBufferSize

public void setBufferSize(int bufferSize)

getBufferSize

public int getBufferSize()

getPath

public java.lang.String getPath()

getLastError

public int getLastError()

isOpen

public boolean isOpen()

getSize

public int getSize()
            throws java.lang.Exception

Throws:

java.lang.Exception

getBuffer

public byte[] getBuffer()
                 throws java.lang.Exception

Throws:

java.lang.Exception

fillBuffer

public final byte[] fillBuffer(int newPosition)

getBufferFill

public final int getBufferFill()

close

public final boolean close()