gzz.impl
Class DummyObsTrigger

java.lang.Object
  |
  +--gzz.impl.DummyObsTrigger

All Implemented Interfaces:

ObsTrigger

public class DummyObsTrigger

extends java.lang.Object

implements ObsTrigger

A dummy ObsTrigger: never triggers anything.

Field Summary

Fields inherited from interface gzz.ObsTrigger

rcsid

Constructor Summary

DummyObsTrigger()

Method Summary

void	addObs(Obs o, java.lang.Object obj, java.lang.Object code) Add an observer.
void	callQueued() Call the changed observers.
void	chg(java.lang.Object obj, java.lang.Object code) Signal that the observers for the given pair should be triggered.
void	rmObs(Obs o) Remove all observations that the given observer is making.

Methods inherited from class java.lang.Object

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

Constructor Detail

DummyObsTrigger

public DummyObsTrigger()

Method Detail

addObs

public void addObs(Obs o,
                   java.lang.Object obj,
                   java.lang.Object code)

Description copied from interface: ObsTrigger

Add an observer.

Specified by:

addObs in interface ObsTrigger

Parameters:

o - The observer. If null, nothing is done; no error may be thrown. (Rationale: otherwise, we would have to check for nullity in all places that call addObs, because they can (almost) all be passed null observers.)

rmObs

public void rmObs(Obs o)

Description copied from interface: ObsTrigger

Remove all observations that the given observer is making.

Specified by:

rmObs in interface ObsTrigger

chg

public void chg(java.lang.Object obj,
                java.lang.Object code)

Description copied from interface: ObsTrigger

Signal that the observers for the given pair should be triggered. All observers that are triggered are then removed from further processing.

Specified by:

chg in interface ObsTrigger

callQueued

public void callQueued()

Description copied from interface: ObsTrigger

Call the changed observers.

Specified by:

callQueued in interface ObsTrigger