com.db4o.io

Class BlockAwareBinWindow

java.lang.Object

com.db4o.io.BlockAwareBinWindow

public class BlockAwareBinWindow
extends java.lang.Object

Bounded handle into an IoAdapter: Can only access a restricted area.

Constructor Summary

Constructors

Constructor and Description
BlockAwareBinWindow(BlockAwareBin io, int blockOff, int len)

Method Summary

Methods

Modifier and Type	Method and Description
void	disable() Disable IO Adapter Window
void	flush() Flush IO Adapter Window
int	length()
int	read(int off, byte[] data)
void	write(int off, byte[] data)

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockAwareBinWindow

public BlockAwareBinWindow(BlockAwareBin io,
                   int blockOff,
                   int len)

Parameters:

io - The delegate I/O adapter

blockOff - The block offset address into the I/O adapter that maps to the start index (0) of this window

len - The size of this window in bytes

Method Detail

length

public int length()

Returns:

Size of this I/O adapter window in bytes.

write

public void write(int off,
         byte[] data)
           throws java.lang.IllegalArgumentException,
                  java.lang.IllegalStateException

Parameters:

off - Offset in bytes relative to the window start

data - Data to write into the window starting from the given offset

Throws:

java.lang.IllegalArgumentException

java.lang.IllegalStateException

read

public int read(int off,
       byte[] data)
         throws java.lang.IllegalArgumentException,
                java.lang.IllegalStateException

Parameters:

off - Offset in bytes relative to the window start

data - Data buffer to read from the window starting from the given offset

Throws:

java.lang.IllegalArgumentException

java.lang.IllegalStateException

disable

public void disable()

Disable IO Adapter Window

flush

public void flush()

Flush IO Adapter Window