Package org.refcodes.io

Class ByteReceiverDecorator

java.lang.Object

org.refcodes.io.AbstractByteProvider

org.refcodes.io.AbstractByteReceiver

org.refcodes.io.ByteReceiverDecorator

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, ByteBlockProvider, ByteBlockReceiver, ByteDatagramProvider, ByteDatagramReceiver, ByteProvider, ByteReceiver, Receivable, org.refcodes.mixin.Releaseable

public class ByteReceiverDecorator
extends AbstractByteReceiver
implements ByteReceiver

The ByteReceiverDecorator decorates a ByteProvider with the additional methods of a ByteReceiver making it easy to use a ByteProvider wherever a ByteReceiver is expected. This is a very plain implementation: hasDatagram() always returns true if AbstractByteReceiver.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 class org.refcodes.io.AbstractByteReceiver

AbstractByteReceiver.ConnectableAutomaton

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.AbstractByteProvider

_datagramQueue, DATAGRAM_QUEUE_SIZE

Fields inherited from class org.refcodes.io.AbstractByteReceiver

_automaton

Constructor Summary

Constructors

Constructor	Description
ByteReceiverDecorator(ByteProvider aByteProvider)	Instantiates a new byte receiver decorator.

Method Summary

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

Methods inherited from class org.refcodes.io.AbstractByteProvider

pushDatagram, pushDatagrams, pushDatagrams

Methods inherited from class org.refcodes.io.AbstractByteReceiver

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

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

ByteReceiverDecorator

public ByteReceiverDecorator(ByteProvider aByteProvider)

Instantiates a new byte receiver decorator.

Parameters:

aByteProvider - the byte provider

Method Detail

readDatagram

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

Reads (receives) the next byte passed from a DatagramSender counterpart. In case none byte is available, then this method blocks until one is available. To prevent blocking, use the ByteDatagramReceiver 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 byte to be read and Thread.interrupt() is being called, then the operation is aborted and an InterruptedException is thrown.

Specified by:

readDatagram in interface ByteDatagramProvider

Overrides:

readDatagram in class AbstractByteReceiver

Returns:

The next byte sent from the ByteDatagramSender 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 AbstractByteReceiver

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 byte[] 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 byte block passed from a BlockSender or DatagramSender counterpart. In case none byte block is available, then this method blocks until one is available. When a Thread is waiting for a byte to be read and Thread.interrupt() is being called, then the operation is aborted and an InterruptedException is thrown.

Specified by:

readDatagrams in interface ByteBlockProvider

Specified by:

readDatagrams in interface ByteProvider

Specified by:

readDatagrams in interface ByteReceiver

Overrides:

readDatagrams in class AbstractByteReceiver

Returns:

The next byte 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 byte[] readDatagrams(int aBlockSize)
                     throws org.refcodes.component.OpenException,
                            InterruptedException

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

Specified by:

readDatagrams in interface ByteBlockProvider

Specified by:

readDatagrams in interface ByteProvider

Specified by:

readDatagrams in interface ByteReceiver

Overrides:

readDatagrams in class AbstractByteReceiver

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 ByteBlockProvider.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 AbstractByteReceiver

Throws:

org.refcodes.component.CloseException