tuwien.auto.calimero.link.medium
Class RawFrameBase

java.lang.Object
  tuwien.auto.calimero.link.medium.RawFrameBase

All Implemented Interfaces:

RawFrame

Direct Known Subclasses:

PL110LData, PL132LData, TP1LData, TP1LPollData

public abstract class RawFrameBase
extends java.lang.Object
implements RawFrame

Implementation for raw frames with common used functionality in L-data and L-polldata frames.

For now, implementation is only done to accommodate reception of raw frame (contained in byte arrays), not to build raw frames out of information parts required to assemble a new raw frame.

Objects of this type are considered immutable.

Field Summary

protected KNXAddress	dst Destination address.
protected boolean	ext Is this an extended (true) or a standard frame (false).
protected int	fcs Frame checksum.
protected int	hopcount Frame hop count.
protected Priority	p Frame priority.
protected boolean	repetition Frame repetition flag.
protected IndividualAddress	src Source address.
protected byte[]	tpdu Transport layer protocol data unit.
protected int	type Frame type identifier.

Fields inherited from interface tuwien.auto.calimero.link.medium.RawFrame

ACK_FRAME, LDATA_FRAME, LPOLLDATA_FRAME

Constructor Summary

RawFrameBase()

Method Summary

int	getChecksum() Returns the frame checksum as contained in the frame.
KNXAddress	getDestination() Returns the KNX destination address.
int	getFrameType() Returns the type of this frame.
byte	getHopcount() Returns the hop count of this frame.
Priority	getPriority() Returns the message priority used for this frame.
IndividualAddress	getSource() Returns the KNX individual source address.
byte[]	getTPDU() Returns a copy of the TPDU, if available.
boolean	isRepetition() Returns whether frame repetition is requested, or this is a repeated frame.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

dst

protected KNXAddress dst

Destination address.

ext

protected boolean ext

Is this an extended (true) or a standard frame (false).

fcs

protected int fcs

Frame checksum.

hopcount

protected int hopcount

Frame hop count.

p

protected Priority p

Frame priority.

repetition

protected boolean repetition

Frame repetition flag.

src

protected IndividualAddress src

Source address.

tpdu

protected byte[] tpdu

Transport layer protocol data unit.

In L-polldata frame tpdu is not used.

type

protected int type

Frame type identifier.

Constructor Detail

RawFrameBase

public RawFrameBase()

Method Detail

getChecksum

public final int getChecksum()

Returns the frame checksum as contained in the frame.

The returned checksum is taken from the frame "as is", it is not recalculated for validation nor checked for correctness.
The length and structure of the returned checksum depends on the communication medium.

Returns:

frame checksum

getDestination

public final KNXAddress getDestination()

Returns the KNX destination address.

Returns:

destination address of type KNXAddress

getFrameType

public final int getFrameType()

Description copied from interface: RawFrame

Returns the type of this frame.

Specified by:

getFrameType in interface RawFrame

Returns:

unsigned frame type identifier

getHopcount

public final byte getHopcount()

Returns the hop count of this frame.

Returns:

hop count in the range 0 <= count <= 7

getPriority

public final Priority getPriority()

Returns the message priority used for this frame.

Returns:

the used Priority

getSource

public final IndividualAddress getSource()

Returns the KNX individual source address.

Returns:

address of type IndividualAddress

getTPDU

public final byte[] getTPDU()

Returns a copy of the TPDU, if available.

Returns:

tpdu as byte array or null for L-polldata frames

isRepetition

public final boolean isRepetition()

Returns whether frame repetition is requested, or this is a repeated frame.

A request for repetition or repeated frame is indicated with true, otherwise false is returned.

Returns:

repeat state as boolean

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object