Package org.hippoecm.frontend.model.event

Class Observable

java.lang.Object

org.hippoecm.frontend.model.event.Observable

All Implemented Interfaces:

Serializable, org.apache.wicket.model.IDetachable, org.apache.wicket.util.io.IClusterable, IObservable

public class Observable
extends Object
implements IObservable, org.apache.wicket.model.IDetachable

Implementation of IObservable that monitors another observable. It is intended to be used by clients to delegate the task of observation to.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
Observable(IObservable target)

Method Summary

Modifier and Type	Method	Description
void	detach()
IObservable	getTarget()
void	setObservationContext(IObservationContext<? extends IObservable> context)	Before observation is started on the observable, an observation context is injected by the observer registry.
void	setTarget(IObservable target)
void	startObservation()	When the first IObserver of this observable is registered with the observer registry, observation is started.
void	stopObservation()	When the last IObserver unregisters, observation is stopped.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.hippoecm.frontend.model.event.IObservable

equals, hashCode

Constructor Details

Observable

public Observable(IObservable target)

Method Details

setObservationContext

public void setObservationContext(IObservationContext<? extends IObservable> context)

Description copied from interface: IObservable

Before observation is started on the observable, an observation context is injected by the observer registry. This context can be used to notify listeners.

Specified by:

setObservationContext in interface IObservable

getTarget

public IObservable getTarget()

setTarget

public void setTarget(IObservable target)

startObservation

public void startObservation()

Description copied from interface: IObservable

When the first IObserver of this observable is registered with the observer registry, observation is started. Implementations must notify observers until observation is stopped.

An implementation should register listeners with external data sources, when appropriate. It is possible for an observable to register as an observer for another observable.

Specified by:

startObservation in interface IObservable

stopObservation

public void stopObservation()

Description copied from interface: IObservable

When the last IObserver unregisters, observation is stopped. Any listeners or observers registered by the observable must be unregistered by the implementation.

Specified by:

stopObservation in interface IObservable

detach

public void detach()

Specified by:

detach in interface org.apache.wicket.model.IDetachable