Package org.epics.archiverappliance.utils.nio

Class WrappedSeekableByteChannel

java.lang.Object

org.epics.archiverappliance.utils.nio.WrappedSeekableByteChannel

All Implemented Interfaces:

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

public class WrappedSeekableByteChannel
extends Object
implements SeekableByteChannel

Compressed files typically do not let us seek arbitrarily within the stream. This is a inefficient workaround for this. This can be improved with ZRan like functionality later if needed. This implements a read only seekable byte channel over a one way input stream.

Author:

mshankar

Constructor Summary

Constructors

Constructor	Description
WrappedSeekableByteChannel(Path path)

Method Summary

Modifier and Type	Method	Description
void	close()
boolean	isOpen()
long	position()
SeekableByteChannel	position(long newPosition)
int	read(ByteBuffer byteBuf)
long	size()
SeekableByteChannel	truncate(long arg0)
int	write(ByteBuffer arg0)

Methods inherited from class java.lang.Object

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

Constructor Detail

WrappedSeekableByteChannel

public WrappedSeekableByteChannel(Path path)
                           throws IOException

Throws:

IOException

Method Detail

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Channel

Specified by:

close in interface Closeable

Throws:

IOException

isOpen

public boolean isOpen()

Specified by:

isOpen in interface Channel

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

read

public int read(ByteBuffer byteBuf)
         throws IOException

Specified by:

read in interface ReadableByteChannel

Specified by:

read in interface SeekableByteChannel

Throws:

IOException

size

public long size()
          throws IOException

Specified by:

size in interface SeekableByteChannel

Throws:

IOException

truncate

public SeekableByteChannel truncate(long arg0)
                             throws IOException

Specified by:

truncate in interface SeekableByteChannel

Throws:

IOException

write

public int write(ByteBuffer arg0)
          throws IOException

Specified by:

write in interface SeekableByteChannel

Specified by:

write in interface WritableByteChannel

Throws:

IOException