Package org.refcodes.io

Class ShortReceiverDecorator

java.lang.Object

org.refcodes.component.AbstractConnectableAutomaton

org.refcodes.io.AbstractShortReceiver

org.refcodes.io.ShortReceiverDecorator

All Implemented Interfaces:

org.refcodes.component.Closable, org.refcodes.component.Closable.CloseAutomaton, org.refcodes.component.ClosedAccessor, org.refcodes.component.ConnectableComponent, org.refcodes.component.ConnectableComponent.ConnectableAutomaton, org.refcodes.component.ConnectionStatusAccessor, org.refcodes.component.OpenedAccessor, Receivable, ShortBlockProvider, ShortBlockReceiver, ShortDatagramProvider, ShortDatagramReceiver, ShortProvider, ShortReceiver, org.refcodes.mixin.Releaseable

public class ShortReceiverDecorator
extends AbstractShortReceiver
implements ShortReceiver

The ShortReceiverDecorator decorates a ShortProvider with the additional methods of a ShortReceiver making it easy to use a ShortProvider wherever a ShortReceiver is expected. This is a very plain implementation: hasDatagram() always returns true if AbstractConnectableAutomaton.isOpened() is true and as long as none of the readDatagram(), readDatagrams() or readDatagrams(int) methods threw an OpenException ( InterruptedException). This implementation actually behaves as if close() has been called after verifying hasDatagram() and before any of the read methods have been called.

Nested Class Summary

Nested classes/interfaces inherited from interface org.refcodes.component.Closable

org.refcodes.component.Closable.CloseAutomaton, org.refcodes.component.Closable.CloseBuilder<B extends org.refcodes.component.Closable.CloseBuilder<B>>

Nested classes/interfaces inherited from interface org.refcodes.component.ClosedAccessor

org.refcodes.component.ClosedAccessor.ClosedMutator, org.refcodes.component.ClosedAccessor.ClosedProperty

Nested classes/interfaces inherited from interface org.refcodes.component.ConnectableComponent

org.refcodes.component.ConnectableComponent.ConnectableAutomaton

Nested classes/interfaces inherited from interface org.refcodes.component.ConnectionStatusAccessor

org.refcodes.component.ConnectionStatusAccessor.ConnectionStatusMutator, org.refcodes.component.ConnectionStatusAccessor.ConnectionStatusProperty

Nested classes/interfaces inherited from interface org.refcodes.component.OpenedAccessor

org.refcodes.component.OpenedAccessor.OpenedMutator, org.refcodes.component.OpenedAccessor.OpenedProperty

Field Summary

Fields inherited from class org.refcodes.io.AbstractShortReceiver

_datagramQueue, DATAGRAM_QUEUE_SIZE

Constructor Summary

Constructors

Constructor	Description
ShortReceiverDecorator(ShortProvider aShortProvider)	Instantiates a new short receiver decorator.

Method Summary

Modifier and Type	Method	Description
void	close()
boolean	hasDatagram()	Determines whether a datagram is available from a DatagramSender.
short	readDatagram()	Reads (receives) the next short passed from a DatagramSender counterpart.
short[]	readDatagrams()	Caution: Reads till an OpenException (or an InterruptedException in case of blocking till more data is available) occurs.
short[]	readDatagrams(int aBlockSize)	Similar to ShortBlockProvider.readDatagrams() though at maximum the amount of data as provided by the block-size is returned.

Methods inherited from class org.refcodes.component.AbstractConnectableAutomaton

getConnectionStatus, isClosable, isClosed, isOpenable, isOpened, open, setConnectionStatus

Methods inherited from class org.refcodes.io.AbstractShortReceiver

pushDatagram, pushDatagrams, pushDatagrams, releaseAll

Methods inherited from interface org.refcodes.component.Closable

closeIn, closeQuietly, closeUnchecked

Methods inherited from interface org.refcodes.component.Closable.CloseAutomaton

isClosable

Methods inherited from interface org.refcodes.component.ClosedAccessor

isClosed

Methods inherited from interface org.refcodes.component.ConnectionStatusAccessor

getConnectionStatus, isConnectionOpened

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.refcodes.component.OpenedAccessor

isOpened

Methods inherited from interface org.refcodes.mixin.Releaseable

releaseAll

Constructor Detail

ShortReceiverDecorator

public ShortReceiverDecorator(ShortProvider aShortProvider)

Instantiates a new short receiver decorator.

Parameters:

aShortProvider - the short provider

Method Detail

readDatagram

public short readDatagram()
                   throws org.refcodes.component.OpenException,
                          InterruptedException

Reads (receives) the next short passed from a DatagramSender counterpart. In case none short is available, then this method blocks until one is available. To prevent blocking, use the ShortDatagramReceiver extension's Receivable.hasDatagram() method to test beforehand whether a byte is available (in a multi-threaded usage scenario, Receivable.hasDatagram() is not a reliable indicator whether this method will block or not). When a Thread is waiting for a short to be read and Thread.interrupt() is being called, then the operation is aborted and an InterruptedException is thrown.

Specified by:

readDatagram in interface ShortDatagramProvider

Overrides:

readDatagram in class AbstractShortReceiver

Returns:

The next short sent from the ShortDatagramSender counterpart.

Throws:

org.refcodes.component.OpenException - Thrown in case opening or accessing an open line (connection, junction, link) caused problems.

InterruptedException - Thrown when a Thread is waiting, sleeping, or otherwise occupied, and the Thread is interrupted, either before or during the activity.

hasDatagram

public boolean hasDatagram()
                    throws org.refcodes.component.OpenException

Determines whether a datagram is available from a DatagramSender. Use the DatagramProvider extenison's DatagramProvider.readDatagram() method for retrieving the available datagram.

Specified by:

hasDatagram in interface Receivable

Overrides:

hasDatagram in class AbstractShortReceiver

Returns:

True in case there is a datagram ready to be retrieved .

Throws:

org.refcodes.component.OpenException - Thrown in case opening or accessing an open line (connection, junction, link) caused problems.

readDatagrams

public short[] readDatagrams()
                      throws org.refcodes.component.OpenException,
                             InterruptedException

Caution: Reads till an OpenException (or an InterruptedException in case of blocking till more data is available) occurs. Reads (receives) the next short block passed from a BlockSender or DatagramSender counterpart. In case none short block is available, then this method blocks until one is available. When a Thread is waiting for a short to be read and Thread.interrupt() is being called, then the operation is aborted and an InterruptedException is thrown.

Specified by:

readDatagrams in interface ShortBlockProvider

Specified by:

readDatagrams in interface ShortProvider

Specified by:

readDatagrams in interface ShortReceiver

Overrides:

readDatagrams in class AbstractShortReceiver

Returns:

The next short block sent from the BlockSender or DatagramReceiver counterpart.

Throws:

org.refcodes.component.OpenException - Thrown in case opening or accessing an open line (connection, junction, link) caused problems.

InterruptedException - Thrown when a Thread is waiting, sleeping, or otherwise occupied, and the Thread is interrupted, either before or during the activity.

readDatagrams

public short[] readDatagrams(int aBlockSize)
                      throws org.refcodes.component.OpenException,
                             InterruptedException

Similar to ShortBlockProvider.readDatagrams() though at maximum the amount of data as provided by the block-size is returned.

Specified by:

readDatagrams in interface ShortBlockProvider

Specified by:

readDatagrams in interface ShortProvider

Specified by:

readDatagrams in interface ShortReceiver

Overrides:

readDatagrams in class AbstractShortReceiver

Parameters:

aBlockSize - The block-size which is not to exceeded by the returned data. A value of -1 specifies to retrieve all available datagrams (same behavior as method ShortBlockProvider.readDatagrams().

Returns:

The next short block sent from the BlockSender or DatagramReceiver counterpart.

Throws:

org.refcodes.component.OpenException - Thrown in case opening or accessing an open line (connection, junction, link) caused problems.

InterruptedException - Thrown when a Thread is waiting, sleeping, or otherwise occupied, and the Thread is interrupted, either before or during the activity.

close

public void close()
           throws org.refcodes.component.CloseException

Specified by:

close in interface org.refcodes.component.Closable

Overrides:

close in class AbstractShortReceiver

Throws:

org.refcodes.component.CloseException