Package com.pnfsoftware.jeb.util.io

Class SubSeekableByteChannel

java.lang.Object

com.pnfsoftware.jeb.util.io.SubSeekableByteChannel

All Implemented Interfaces:

Closeable, AutoCloseable, ByteChannel, Channel, ReadableByteChannel, SeekableByteChannel, WritableByteChannel

public class SubSeekableByteChannel
extends Object
implements SeekableByteChannel

An seekable channel presenting a region of another seekable channel. Only read-operations are supported. Attempts to write or modify the master channel will raise an IOException.

Constructor Summary

Constructors

Constructor	Description
SubSeekableByteChannel(SeekableByteChannel channel, long base, long maxsize)	Create a sub channel.

Method Summary

Modifier and Type	Method	Description
void	close()	Close this sub-channel and its master channel.
boolean	isOpen()
long	position()
SeekableByteChannel	position(long newPosition)
int	read(ByteBuffer dst)
long	size()
SeekableByteChannel	truncate(long size)
int	write(ByteBuffer src)

Methods inherited from class java.lang.Object

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

Constructor Details

SubSeekableByteChannel

public SubSeekableByteChannel(SeekableByteChannel channel,
 long base,
 long maxsize)
                       throws IOException

Create a sub channel.

Parameters:

channel - the main channel

base - beginning of region

maxsize - size of region

Throws:

IOException

Method Details

isOpen

public boolean isOpen()

Specified by:

isOpen in interface Channel

close

public void close()
           throws IOException

Close this sub-channel and its master channel.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Channel

Specified by:

close in interface Closeable

Throws:

IOException

read

public int read(ByteBuffer dst)
         throws IOException

Specified by:

read in interface ReadableByteChannel

Specified by:

read in interface SeekableByteChannel

Throws:

IOException

write

public int write(ByteBuffer src)
          throws IOException

Specified by:

write in interface SeekableByteChannel

Specified by:

write in interface WritableByteChannel

Throws:

IOException

position

public long position()
              throws IOException

Specified by:

position in interface SeekableByteChannel

Throws:

IOException

position

public SeekableByteChannel position(long newPosition)
                             throws IOException

Specified by:

position in interface SeekableByteChannel

Throws:

IOException

size

public long size()
          throws IOException

Specified by:

size in interface SeekableByteChannel

Throws:

IOException

truncate

public SeekableByteChannel truncate(long size)
                             throws IOException

Specified by:

truncate in interface SeekableByteChannel

Throws:

IOException