Package org.hippoecm.frontend.model

Class ObservableModel<T extends Serializable>

java.lang.Object

org.apache.wicket.model.Model<T>

org.hippoecm.frontend.model.ObservableModel<T>

All Implemented Interfaces:

Serializable, org.apache.wicket.model.IDetachable, org.apache.wicket.model.IModel<T>, org.apache.wicket.model.IObjectClassAwareModel<T>, org.apache.wicket.util.io.IClusterable, IObservable

public class ObservableModel<T extends Serializable>
extends org.apache.wicket.model.Model<T>
implements IObservable

An IModel that is observable by plugins.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ObservableModel(T object)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)	Equivalence of observables; observation will only be started on one instance.
static <T extends Serializable> ObservableModel<T>	from(IPluginContext context, String id)	Retrieve the model object from the context with specific id.
int	hashCode()
void	notifyObservers(EventCollection events)
void	setObject(T object)
void	setObservationContext(IObservationContext context)	Before observation is started on the observable, an observation context is injected by the observer registry.
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 org.apache.wicket.model.Model

detach, getObject, getObjectClass, of, of, of, ofList, ofMap, ofSet, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.wicket.model.IModel

as, combineWith, filter, flatMap, isPresent, map, orElse, orElseGet

Constructor Details

ObservableModel

public ObservableModel(T object)

Method Details

setObject

public void setObject(T object)

Specified by:

setObject in interface org.apache.wicket.model.IModel<T extends Serializable>

Overrides:

setObject in class org.apache.wicket.model.Model<T extends Serializable>

setObservationContext

public void setObservationContext(IObservationContext 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

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

notifyObservers

public void notifyObservers(EventCollection events)

equals

public boolean equals(Object obj)

Description copied from interface: IObservable

Equivalence of observables; observation will only be started on one instance.

Specified by:

equals in interface IObservable

Overrides:

equals in class org.apache.wicket.model.Model<T extends Serializable>

hashCode

public int hashCode()

Specified by:

hashCode in interface IObservable

Overrides:

hashCode in class org.apache.wicket.model.Model<T extends Serializable>

See Also:

• IObservable.equals(Object)

from

public static <T extends Serializable>
ObservableModel<T> from(IPluginContext context,
 String id)

Retrieve the model object from the context with specific id. If it is not found, create and register a new model instance.