com.globusltd.recyclerview.util

Class Observable<T>

java.lang.Object

com.globusltd.recyclerview.util.Observable<T>

Type Parameters:

T - The observer type.

Direct Known Subclasses:

ChoiceModeObservable, DatasourceObservable

public abstract class Observable<T>
extends Object

Provides methods for registering or unregistering arbitrary observers in an ArrayList.

This abstract class is intended to be subclassed and specialized to maintain a registry of observers of specific types and dispatch notifications to them.

Field Summary

Fields

Modifier and Type	Field and Description
protected List<T>	mObservers The list of observers.

Constructor Summary

Constructors

Constructor and Description
Observable()

Method Summary

Modifier and Type	Method and Description
boolean	hasObservers() Checks if this observable has any registered observers.
void	registerObserver(T observer) Adds an observer to the list.
void	unregisterAll() Remove all registered observers.
void	unregisterObserver(T observer) Removes a previously registered observer.

Methods inherited from class java.lang.Object

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

Field Detail

mObservers

@NonNull
protected final List<T> mObservers

The list of observers. An observer can be in the list at most once and will never be null.

Constructor Detail

Observable

public Observable()

Method Detail

hasObservers

public boolean hasObservers()

Checks if this observable has any registered observers.

Returns:

true if this observable has any registered observers, false otherwise.

registerObserver

public void registerObserver(@NonNull
                             T observer)

Adds an observer to the list.

Parameters:

observer - the observer to register

unregisterObserver

public void unregisterObserver(@NonNull
                               T observer)

Removes a previously registered observer.

Parameters:

observer - the observer to unregister

unregisterAll

public void unregisterAll()

Remove all registered observers.