java.nio.channels
Class Channels.WritableByteChannelImpl

java.lang.Object
  java.nio.channels.spi.AbstractInterruptibleChannel
      java.nio.channels.Channels.WritableByteChannelImpl

All Implemented Interfaces:

Channel, InterruptibleChannel, WritableByteChannel

Enclosing class:

Channels

private static class Channels.WritableByteChannelImpl

extends AbstractInterruptibleChannel

implements WritableByteChannel

Nested Class Summary

Nested classes inherited from class java.nio.channels.spi.AbstractInterruptibleChannel

Field Summary

private byte[]	buf
private boolean	open
(package private) OutputStream	out
private static int	TRANSFER_SIZE
private Object	writeLock

Fields inherited from class java.nio.channels.spi.AbstractInterruptibleChannel

Constructor Summary

(package private)

Channels.WritableByteChannelImpl(OutputStream out)

Method Summary

protected void	implCloseChannel() Closes this channel.
int	write(ByteBuffer src) Writes a sequence of bytes to this channel from the given buffer.

Methods inherited from class java.nio.channels.spi.AbstractInterruptibleChannel

begin, close, end, isOpen

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.nio.channels.Channel

close, isOpen

Field Detail

out

OutputStream out

TRANSFER_SIZE

private static final int TRANSFER_SIZE

See Also:

Constant Field Values

buf

private byte[] buf

open

private boolean open

writeLock

private Object writeLock

Constructor Detail

Channels.WritableByteChannelImpl

Channels.WritableByteChannelImpl(OutputStream out)

Method Detail

write

public int write(ByteBuffer src)
          throws IOException

Description copied from interface: WritableByteChannel

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

An attempt is made to write up to r bytes to the channel, where r is the number of bytes remaining in the buffer, that is, dst.remaining(), at the moment this method is invoked.

Suppose that a byte sequence of length n is written, where 0 <= n <= r. This byte sequence will be transferred from the buffer starting at index p, where p is the buffer's position at the moment this method is invoked; the index of the last byte written will be p + n - 1. Upon return the buffer's position will be equal to p + n; its limit will not have changed.

Unless otherwise specified, a write operation will return only after writing all of the r requested bytes. Some types of channels, depending upon their state, may write only some of the bytes or possibly none at all. A socket channel in non-blocking mode, for example, cannot write any more bytes than are free in the socket's output buffer.

This method may be invoked at any time. If another thread has already initiated a write operation upon this channel, however, then an invocation of this method will block until the first operation is complete.

Specified by:

write in interface WritableByteChannel

Parameters:

src - The buffer from which bytes are to be retrieved

Returns:

The number of bytes written, possibly zero

Throws:

IOException - If some other I/O error occurs

implCloseChannel

protected void implCloseChannel()
                         throws IOException

Description copied from class: AbstractInterruptibleChannel

Closes this channel.

This method is invoked by the close method in order to perform the actual work of closing the channel. This method is only invoked if the channel has not yet been closed, and it is never invoked more than once.

An implementation of this method must arrange for any other thread that is blocked in an I/O operation upon this channel to return immediately, either by throwing an exception or by returning normally.

Specified by:

implCloseChannel in class AbstractInterruptibleChannel

Throws:

IOException - If an I/O error occurs while closing the channel