de.htw.berlin.polysun4diac.forte.comm

Class TCPcommunicationLayer

java.lang.Object

de.htw.berlin.polysun4diac.forte.comm.AbstractCommunicationLayer

de.htw.berlin.polysun4diac.forte.comm.TCPcommunicationLayer

All Implemented Interfaces:

ICommunicationLayer, java.io.Serializable

Direct Known Subclasses:

TCPclientCommLayer, TCPserverCommLayer

public abstract class TCPcommunicationLayer
extends AbstractCommunicationLayer

Abstract bottom OSI layer for handling TCP/IP communication.

Author:

Marc Jakobi

HTW Berlin

July 2017

See Also:

FORTE communication architecture, Serialized Form

Constructor Summary

Constructors

Constructor and Description
TCPcommunicationLayer()

Method Summary

Modifier and Type	Method and Description
boolean	closeConnection() Closes this layer and calls closeConnection() on the layer below.
boolean	getConnectionState()
byte	readByte() Reads a byte from the communication layer below or the connected device if this layer is the bottom layer.
double	readDouble() Reads 8 bytes from the communication layer below or the connected device if this layer is the bottom layer.
float	readFloat() Reads 4 bytes from the communication layer below or the connected device if this layer is the bottom layer.
long	readLong() Reads 4 bytes from the communication layer below or the connected device if this layer is the bottom layer.
void	recvData() Performs the necessary actions for receiving data.
void	recvData(byte[] buffer) Reads
void	sendData(byte[] data, int off, int len) Performs the necessary actions for sending data.

Methods inherited from class de.htw.berlin.polysun4diac.forte.comm.AbstractCommunicationLayer

getAbove, getBelow, getRawBytes, openConnection, sendData, setAbove, setBelow

Methods inherited from class java.lang.Object

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

Constructor Detail

TCPcommunicationLayer

public TCPcommunicationLayer()

Method Detail

closeConnection

public boolean closeConnection()
                        throws java.io.IOException

Description copied from interface: ICommunicationLayer

Closes this layer and calls closeConnection() on the layer below.

Specified by:

closeConnection in interface ICommunicationLayer

Overrides:

closeConnection in class AbstractCommunicationLayer

Returns:

true if the connection was closed successfully, false otherwise

Throws:

java.io.IOException

recvData

public void recvData(byte[] buffer)
              throws java.io.IOException

Reads

Parameters:

buffer -

Throws:

java.io.IOException

recvData

public void recvData()
              throws java.io.IOException

Description copied from interface: ICommunicationLayer

Performs the necessary actions for receiving data.

Specified by:

recvData in interface ICommunicationLayer

Overrides:

recvData in class AbstractCommunicationLayer

Throws:

java.io.IOException

readByte

public byte readByte()
              throws java.io.IOException

Description copied from interface: ICommunicationLayer

Reads a byte from the communication layer below or the connected device if this layer is the bottom layer.

Specified by:

readByte in interface ICommunicationLayer

Overrides:

readByte in class AbstractCommunicationLayer

Throws:

java.io.IOException

readLong

public long readLong()
              throws java.io.IOException

Description copied from interface: ICommunicationLayer

Reads 4 bytes from the communication layer below or the connected device if this layer is the bottom layer.

Specified by:

readLong in interface ICommunicationLayer

Overrides:

readLong in class AbstractCommunicationLayer

Returns:

the long value represented by the 4 bytes.

Throws:

java.io.IOException

readDouble

public double readDouble()
                  throws java.io.IOException

Description copied from interface: ICommunicationLayer

Reads 8 bytes from the communication layer below or the connected device if this layer is the bottom layer.

Specified by:

readDouble in interface ICommunicationLayer

Overrides:

readDouble in class AbstractCommunicationLayer

Returns:

the double value represented by the 8 bytes.

Throws:

java.io.IOException

readFloat

public float readFloat()
                throws java.io.IOException

Description copied from interface: ICommunicationLayer

Reads 4 bytes from the communication layer below or the connected device if this layer is the bottom layer.

Specified by:

readFloat in interface ICommunicationLayer

Overrides:

readFloat in class AbstractCommunicationLayer

Returns:

the float value represented by the 4 bytes.

Throws:

java.io.IOException

getConnectionState

public boolean getConnectionState()

Specified by:

getConnectionState in interface ICommunicationLayer

Overrides:

getConnectionState in class AbstractCommunicationLayer

Returns:

true if the layer is connected, false otherwise.

sendData

public void sendData(byte[] data,
                     int off,
                     int len)
              throws java.io.IOException

Description copied from interface: ICommunicationLayer

Performs the necessary actions for sending data.

Specified by:

sendData in interface ICommunicationLayer

Overrides:

sendData in class AbstractCommunicationLayer

Parameters:

data - Byte array containing the data

len - Length of the data to be sent

Throws:

java.io.IOException