org.xnio.conduits

Class FixedLengthStreamSinkConduit

java.lang.Object

org.xnio.conduits.AbstractConduit<D>

org.xnio.conduits.AbstractSinkConduit<D>

org.xnio.conduits.AbstractStreamSinkConduit<StreamSinkConduit>

org.xnio.conduits.FixedLengthStreamSinkConduit

All Implemented Interfaces:

Conduit, SinkConduit, StreamSinkConduit

public final class FixedLengthStreamSinkConduit
extends AbstractStreamSinkConduit<StreamSinkConduit>
implements StreamSinkConduit

A stream sink conduit with a limited length.

Author:

David M. Lloyd

Field Summary

Fields inherited from class org.xnio.conduits.AbstractConduit

next

Constructor Summary

Constructors

Constructor and Description
FixedLengthStreamSinkConduit(FixedLengthStreamSinkConduit next) Construct a new instance.

Method Summary

Methods

Modifier and Type	Method and Description
long	getRemaining() Get the number of remaining bytes available to read.
void	terminateWrites() Signal that no more write data is forthcoming.
long	transferFrom(FileChannel src, long position, long count) Transfer bytes into this conduit from the given file.
long	transferFrom(StreamSourceChannel source, long count, ByteBuffer throughBuffer) Transfers bytes from the given channel source.
void	truncateWrites() Terminate writes and discard any outstanding write data.
int	write(ByteBuffer src) Writes a sequence of bytes to this conduit from the given buffer.
long	write(ByteBuffer[] srcs, int offs, int len) Writes a sequence of bytes to this conduit from the given buffers.

Methods inherited from class org.xnio.conduits.AbstractSinkConduit

awaitWritable, awaitWritable, flush, getWriteThread, isWriteResumed, isWriteShutdown, resumeWrites, setWriteReadyHandler, suspendWrites, wakeupWrites

Methods inherited from class org.xnio.conduits.AbstractConduit

getWorker

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.xnio.conduits.SinkConduit

awaitWritable, awaitWritable, flush, getWriteThread, isWriteResumed, isWriteShutdown, resumeWrites, setWriteReadyHandler, suspendWrites, wakeupWrites

Methods inherited from interface org.xnio.conduits.Conduit

getWorker

Constructor Detail

FixedLengthStreamSinkConduit

public FixedLengthStreamSinkConduit(FixedLengthStreamSinkConduit next)

Construct a new instance.

Parameters:

next - the delegate conduit to set

Method Detail

transferFrom

public long transferFrom(FileChannel src,
                long position,
                long count)
                  throws IOException

Description copied from interface: StreamSinkConduit

Transfer bytes into this conduit from the given file.

Specified by:

transferFrom in interface StreamSinkConduit

Overrides:

transferFrom in class AbstractStreamSinkConduit<StreamSinkConduit>

Parameters:

src - the file to read from

position - the position within the file from which the transfer is to begin

count - the number of bytes to be transferred

Returns:

the number of bytes (possibly 0) that were actually transferred

Throws:

IOException - if an I/O error occurs

transferFrom

public long transferFrom(StreamSourceChannel source,
                long count,
                ByteBuffer throughBuffer)
                  throws IOException

Description copied from interface: StreamSinkConduit

Transfers bytes from the given channel source. On entry, throughBuffer will be cleared. On exit, the buffer will be flipped for emptying, and may be empty or may contain data. If this method returns a value less than count, then the remaining data in throughBuffer may contain data read from source which must be written to this channel to complete the operation.

Specified by:

transferFrom in interface StreamSinkConduit

Overrides:

transferFrom in class AbstractStreamSinkConduit<StreamSinkConduit>

Parameters:

source - the source to read from

count - the number of bytes to be transferred

throughBuffer - the buffer to copy through.

Returns:

the number of bytes (possibly 0) that were actually transferred, or -1 if the end of input was reached

Throws:

IOException - if an I/O error occurs

write

public int write(ByteBuffer src)
          throws IOException

Description copied from interface: StreamSinkConduit

Writes a sequence of bytes to this conduit from the given buffer.

Specified by:

write in interface StreamSinkConduit

Overrides:

write in class AbstractStreamSinkConduit<StreamSinkConduit>

Parameters:

src - the buffer containing data to write

Returns:

the number of bytes written, possibly 0

Throws:

ClosedChannelException - if this conduit's SinkConduit.terminateWrites() method was previously called

IOException - if an error occurs

write

public long write(ByteBuffer[] srcs,
         int offs,
         int len)
           throws IOException

Description copied from interface: StreamSinkConduit

Writes a sequence of bytes to this conduit from the given buffers.

Specified by:

write in interface StreamSinkConduit

Overrides:

write in class AbstractStreamSinkConduit<StreamSinkConduit>

Parameters:

srcs - the buffers containing data to write

offs - the offset into the buffer array

len - the number of buffers to write

Returns:

the number of bytes written, possibly 0

Throws:

ClosedChannelException - if this conduit's SinkConduit.terminateWrites() method was previously called

IOException - if an error occurs

terminateWrites

public void terminateWrites()
                     throws IOException

Description copied from interface: SinkConduit

Signal that no more write data is forthcoming. The conduit must be SinkConduit.flush()ed before it is considered to be shut down.

Specified by:

terminateWrites in interface SinkConduit

Overrides:

terminateWrites in class AbstractSinkConduit<StreamSinkConduit>

Throws:

IOException

truncateWrites

public void truncateWrites()
                    throws IOException

Description copied from interface: SinkConduit

Terminate writes and discard any outstanding write data. The conduit is terminated and flushed regardless of the outcome of this method.

Specified by:

truncateWrites in interface SinkConduit

Overrides:

truncateWrites in class AbstractSinkConduit<StreamSinkConduit>

Throws:

IOException - if channel termination failed for some reason

getRemaining

public long getRemaining()

Get the number of remaining bytes available to read.

Returns:

the number of remaining bytes available to read