org.hippoecm.frontend.model.event

Interface IObserver<T extends IObservable>

All Superinterfaces:

EventListener, org.apache.wicket.util.io.IClusterable, Serializable

All Known Implementing Classes:

AbstractListingPlugin, AbstractRenderService, BreadcrumbPlugin, BrowserPlugin, CompatibilityWorkflowPlugin, ExpandCollapseListingPlugin, JcrTreeModel, ListRenderService, ListViewPlugin, ListViewService, Observer, PanelPluginPerspective, Perspective, RenderPlugin, RenderService, TabsContainerService, TabsPlugin, TabsPlugin.Tab

public interface IObserver<T extends IObservable>
extends EventListener, org.apache.wicket.util.io.IClusterable

This interface defines the contract for a service that updates its internal state in response to changes in an observable object (IObservable). Instances should be registered as a service (IPluginContext.registerService(IClusterable, String)) with name IObserver.class.getName(). The observer registry will notify the observer of any events sent by the observable.

Method Summary

Modifier and Type	Method and Description
T	getObservable() The observable that the observer is interested in.
void	onEvent(Iterator<? extends IEvent<T>> events) Callback that is invoked when the observable sends events.

Method Detail

getObservable

T getObservable()

The observable that the observer is interested in. This observable may not change, w.r.t. the IObservable.equals(java.lang.Object) method, while the observer is registered.

onEvent

void onEvent(Iterator<? extends IEvent<T>> events)

Callback that is invoked when the observable sends events. The iterator is guaranteed to be non-empty.