Class SeekableReadableChannelWithOffset<A, X extends SeekableReadableChannel<A>>

java.lang.Object

org.aksw.commons.util.closeable.AutoCloseableWrapperBase<X>

org.aksw.commons.io.shared.ChannelDecoratorBase<X>

org.aksw.commons.io.input.SeekableReadableChannelWithOffset<A,X>

All Implemented Interfaces:

Closeable, AutoCloseable, Cloneable, Channel, HasArrayOps<A>, HasPosition, ReadableChannel<A>, ReadableSource<A>, SeekableReadableChannel<A>

public class SeekableReadableChannelWithOffset<A, X extends SeekableReadableChannel<A>>
extends ChannelDecoratorBase<X>
implements SeekableReadableChannel<A>

Field Summary

Fields

Modifier and Type	Field	Description
protected long	offset

Fields inherited from class AutoCloseableWrapperBase

delegate

Constructor Summary

Constructors

Constructor	Description
SeekableReadableChannelWithOffset(X delegate, long offset)

Method Summary

Modifier and Type	Method	Description
SeekableReadableChannel<A>	cloneObject()	Optional operation.
ArrayOps<A>	getArrayOps()
boolean	isOpen()
long	position()
void	position(long position)
int	read(A array, int position, int length)	Read method following the usual InputStream protocol.

Methods inherited from class ChannelDecoratorBase

close

Methods inherited from class AutoCloseableWrapperBase

close, getDelegate

Methods inherited from class Object

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

Methods inherited from interface Channel

close

Methods inherited from interface ReadableSource

readRaw

Field Details

offset

protected long offset

Constructor Details

SeekableReadableChannelWithOffset

public SeekableReadableChannelWithOffset(X delegate,
 long offset)

Method Details

read

public int read(A array,
 int position,
 int length)
         throws IOException

Description copied from interface: ReadableSource

Read method following the usual InputStream protocol.

Specified by:

read in interface ReadableSource<A>

Parameters:

array - The array into which to put the read data

position - Offset into array where to start writing

length - Maximum number of items to read.

Returns:

The number of items read. Return -1 if end of data was reached, and 0 iff length was 0.

Throws:

IOException

getArrayOps

public ArrayOps<A> getArrayOps()

Specified by:

getArrayOps in interface HasArrayOps<A>

isOpen

public boolean isOpen()

Specified by:

isOpen in interface Channel

Overrides:

isOpen in class ChannelDecoratorBase<X extends SeekableReadableChannel<A>>

position

public long position()
              throws IOException

Specified by:

position in interface HasPosition

Throws:

IOException

position

public void position(long position)
              throws IOException

Specified by:

position in interface HasPosition

Throws:

IOException

cloneObject

public SeekableReadableChannel<A> cloneObject()

Description copied from interface: SeekableReadableChannel

Optional operation. Open a new channel to the underlying source at the same position as this channel. The returned channel is an independent entity and needs to be closed separatedly. Opening a channel this way may be faster than opening a new channel at the source because information about this channel may be re-used (e.g. held pages and pointers into internal data structures)

Specified by:

cloneObject in interface SeekableReadableChannel<A>