Module is.codion.common.reactive

Package is.codion.common.reactive.state

Interface ObservableState

All Superinterfaces:

Observer<Boolean>

All Known Subinterfaces:

EntityConditionModel.Modified, EntityEditModel.EntityEditor.Exists, EntityEditModel.EntityEditor.Modified, State

public interface ObservableState
extends Observer<Boolean>

An observable boolean state, extending Observer to provide listener capabilities.

Listener methods are inherited from Observer and delegate to observer().

See Also:

• State

Nested Class Summary

Nested classes/interfaces inherited from interface is.codion.common.reactive.observer.Observer

Observer.Builder<T,B extends Observer.Builder<T,B>>

Method Summary

Modifier and Type	Method	Description
boolean	is()
ObservableState	not()
Observer<Boolean>	observer()	Returns the underlying Observer to which listener operations are delegated.

Methods inherited from interface is.codion.common.reactive.observer.Observer

addConsumer, addListener, addWeakConsumer, addWeakListener, removeConsumer, removeListener, removeWeakConsumer, removeWeakListener, when, when

Method Details

is

boolean is()

Returns:

the value of this state

not

ObservableState not()

Returns:

A ObservableState instance that is always the reverse of this ObservableState instance

observer

Observer<Boolean> observer()

Description copied from interface: Observer

Returns the underlying Observer to which listener operations are delegated.

For AbstractObserver subclasses this method returns this. For wrapper types, this returns the delegate observer.

Specified by:

observer in interface Observer<Boolean>

Returns:

an Observer notified each time the observed value may have changed