Interface IObservable
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- All Superinterfaces:
org.apache.wicket.util.io.IClusterable
,Serializable
- All Known Subinterfaces:
IClusterConfig
,IFieldDescriptor
,IModelReference<T>
,IObservableModel<T>
,IPluginConfig
,ITypeDescriptor
- All Known Implementing Classes:
AbstractClusterDecorator
,AbstractPluginDecorator
,BrowserSearchResultModel
,BuiltinTypeDescriptor
,ClusterConfigDecorator
,CssClassAppender
,DocumentsProvider
,InheritingPluginConfig
,JavaClusterConfig
,JavaFieldDescriptor
,JavaPluginConfig
,JavaTypeDescriptor
,JcrClusterConfig
,JcrNodeModel
,JcrObject
,JcrPluginConfig
,JcrPropertyModel
,JcrQueryModel
,ModelReference
,NodeNameModel
,NodePickerPluginConfig
,Observable
,ObservableModel
,ObservablePropertyModel
,ObservableTreeModel
,StateIconAttributes
,TextSearchResultModel
,TypeStateAttributes
public interface IObservable extends org.apache.wicket.util.io.IClusterable
Interface implemented by observable objects. When multiple different observables are equivalent according to theirequals(Object)
method, observation is started on one instance.This interface must be implemented by observable objects, but should not be invoked by plugins.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description boolean
equals(Object obj)
Equivalence of observables; observation will only be started on one instance.int
hashCode()
void
setObservationContext(IObservationContext<? extends IObservable> context)
Before observation is started on the observable, an observation context is injected by the observer registry.void
startObservation()
When the firstIObserver
of this observable is registered with the observer registry, observation is started.void
stopObservation()
When the lastIObserver
unregisters, observation is stopped.
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Method Detail
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setObservationContext
void setObservationContext(IObservationContext<? extends IObservable> context)
Before observation is started on the observable, an observation context is injected by the observer registry. This context can be used to notify listeners.
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startObservation
void startObservation()
When the firstIObserver
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.
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stopObservation
void stopObservation()
When the lastIObserver
unregisters, observation is stopped. Any listeners or observers registered by the observable must be unregistered by the implementation.
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equals
boolean equals(Object obj)
Equivalence of observables; observation will only be started on one instance.
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hashCode
int hashCode()
- Overrides:
hashCode
in classObject
- See Also:
equals(Object)
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