com.flightpanels.scs
Class DataReference<T>

java.lang.Object
  com.flightpanels.scs.DataReference<T>

All Implemented Interfaces:

IDataReference

Direct Known Subclasses:

DataReferenceBool, DataReferenceDouble, DataReferenceFloat, DataReferenceFloatVector, DataReferenceInt, DataReferenceString

public abstract class DataReference<T>
extends java.lang.Object
implements IDataReference

Java port of the DataReference class template of libcanaero, v1.0.

Version:

1.0

Author:

(c) 2008-2010 by Philipp Münzel, Technische Universität Darmstadt, Department of Mathematics

Constructor Summary

DataReference(IUpdateable<T> updateable)

Method Summary

boolean	hasChanged()
boolean	needsRequest()
abstract void	readFromCan(CanAeroMetadata meta, can_t can) read incoming data from the bus into the cache
void	requested() data was requested, reset the internal timeout
void	signUp(IUpdateable ref) Geez, where is my little brown Java barf bag?
void	update() Update all the associated IUpdateables with the value that was last received
can_t	write(CanAeroMetadata meta, java.lang.Object value) Write data to can-object that can be send to the bus

Methods inherited from class java.lang.Object

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

Constructor Detail

DataReference

public DataReference(IUpdateable<T> updateable)

Parameters:

updateable - the instance that should be notified if the value changed

Method Detail

signUp

public void signUp(IUpdateable ref)

Geez, where is my little brown Java barf bag?

Specified by:

signUp in interface IDataReference

Parameters:

ref - Another time to search for the little brown Java Barf Bag.

See Also:

IDataReference.signUp(com.flightpanels.scs.IUpdateable)

hasChanged

public boolean hasChanged()

Specified by:

hasChanged in interface IDataReference

Returns:

has the last reception changed the value in the cache?

needsRequest

public boolean needsRequest()

Specified by:

needsRequest in interface IDataReference

Returns:

is the time elapsed since the last recption so long we should issue another request?

readFromCan

public abstract void readFromCan(CanAeroMetadata meta,
                                 can_t can)

Description copied from interface: IDataReference

read incoming data from the bus into the cache

Specified by:

readFromCan in interface IDataReference

Parameters:

meta - accompanying meta-data (id, message code counter etc..)

can - the incoming data itself

requested

public void requested()

Description copied from interface: IDataReference

data was requested, reset the internal timeout

Specified by:

requested in interface IDataReference

update

public void update()

Description copied from interface: IDataReference

Update all the associated IUpdateables with the value that was last received

Specified by:

update in interface IDataReference

write

public can_t write(CanAeroMetadata meta,
                   java.lang.Object value)

Description copied from interface: IDataReference

Write data to can-object that can be send to the bus

Specified by:

write in interface IDataReference

Parameters:

meta - accompanying meta-data (id, message code counter etc..)

value - the value that should be written

Returns:

the can structure as expected by the participants on the bus