iitb.con.io
Interface IOAdapter

All Known Implementing Classes:

BufferedFileAdapter, FileAdapter, MemMapFileAdapter

public interface IOAdapter

Interface to handle IO operations with file.

See Also:

ByteBuffer

Method Summary

void	close() Closes the IO Adapter
long	getFileLength() Returns the length of the file
byte[]	read(long location, int length) Reads the contents and return it as byte array.
java.nio.ByteBuffer[]	readFileAsBlocks() Reads the entire contents of the file as ByteBuffer array. The contents as divided as block based on the block size value
java.nio.ByteBuffer	readIntoBuffer(long location) Reads the contents into the temporary buffer and returns it as ByteBuffer
void	write(byte[] block, long location) Writes the contents to the specified location.
void	write(java.nio.ByteBuffer[] blocks, long location) Writes the contents provided as array to the specified location.
void	write(java.nio.ByteBuffer block, long location) Writes the contents to the specified location.

Method Detail

close

void close()
           throws java.io.IOException

Closes the IO Adapter

Throws:

java.io.IOException - if file operation fails

getFileLength

long getFileLength()

Returns the length of the file

Returns:

file length

read

byte[] read(long location,
            int length)
            throws java.io.IOException

Reads the contents and return it as byte array.

Parameters:

location - location of the content in file

length - length of the content to read from the specified location

Returns:

contents in a byte array

Throws:

java.io.IOException

readFileAsBlocks

java.nio.ByteBuffer[] readFileAsBlocks()
                                       throws java.io.IOException

Reads the entire contents of the file as ByteBuffer array.
The contents as divided as block based on the block size value

Returns:

contents as ByteBuffer array

Throws:

java.io.IOException - if file operation fails

readIntoBuffer

java.nio.ByteBuffer readIntoBuffer(long location)
                                   throws java.io.IOException

Reads the contents into the temporary buffer and returns it as ByteBuffer

Parameters:

location - location to be read

Returns:

contents as ByteBuffer

Throws:

java.io.IOException - if file operation fails

write

void write(byte[] block,
           long location)
           throws java.io.IOException

Writes the contents to the specified location.

Parameters:

block - the content block as bytes

location - location to be written

Throws:

java.io.IOException - if file operation fails

write

void write(java.nio.ByteBuffer[] blocks,
           long location)
           throws java.io.IOException

Writes the contents provided as array to the specified location.

Parameters:

blocks - contents as array of blocks

location - location to be written

Throws:

java.io.IOException - if file operation fails

write

void write(java.nio.ByteBuffer block,
           long location)
           throws java.io.IOException

Writes the contents to the specified location.

Parameters:

block - the content block

location - location to be written

Throws:

java.io.IOException - if file operation fails