eu.bandm.tools.message

Class TrafficMessageReceiver

java.lang.Object

eu.bandm.tools.message.TrafficMessageReceiver

All Implemented Interfaces:

MessageReceiver<Message>

public class TrafficMessageReceiver
extends Object
implements MessageReceiver<Message>

Graphic indication of received messages.

One or more TrafficLight objects can be linked to this kind of message receiver. The state of all these is changed to "red" as soon as a critical message arrives, and to "yellow" as soon as any other message arrives (provided the state is not red!).
As long as no message arrives, the intial state is left unchanged.

Constructor Summary

Constructors

Constructor and Description
TrafficMessageReceiver()

Method Summary

Modifier and Type	Method and Description
void	addLight(TrafficLight light) Adds light as a target to state changes.
void	clear() Convenience: set state of all currently added traffic lights to "green".
TrafficLight	createLight() Convenience: constructs a new TrafficLight and adds it.
TrafficLight.State	getState()
void	receive(Message msg)
void	removeLight(TrafficLight light) Removes light as a target to state changes.
protected void	setState(TrafficLight.State state) Convenience: set state of all currently added traffic lights to state.

Methods inherited from class java.lang.Object

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

Constructor Detail

TrafficMessageReceiver

public TrafficMessageReceiver()

Method Detail

addLight

public void addLight(TrafficLight light)

Adds light as a target to state changes.

removeLight

public void removeLight(TrafficLight light)

Removes light as a target to state changes.

createLight

public TrafficLight createLight()

Convenience: constructs a new TrafficLight and adds it.

clear

public void clear()

Convenience: set state of all currently added traffic lights to "green".

receive

public void receive(Message msg)

Specified by:

receive in interface MessageReceiver<Message>

getState

public TrafficLight.State getState()

setState

protected void setState(TrafficLight.State state)

Convenience: set state of all currently added traffic lights to state.