de.gwdg.metadataqa.api.interfaces

Interface Observable

All Known Implementing Classes:

ProblemCatalog

public interface Observable

Implementation of the Observer design pattern (https://en.wikipedia.org/wiki/Observer_pattern). There is a core Java implementation (java.util.Observable), but that is not an interface but class, so it breaks some OO design principles.

Author:

Péter Király

Method Summary

Modifier and Type	Method and Description
void	addObserver(Observer observer) Add an observer object to the subject.
void	deleteObserver(Observer observer) Removes an observer object from the list of registered observers.
void	notifyObservers() Notify observers about a change.

Method Detail

notifyObservers

void notifyObservers()

Notify observers about a change.

addObserver

void addObserver(Observer observer)

Add an observer object to the subject.

Parameters:

observer - An observer object

deleteObserver

void deleteObserver(Observer observer)

Removes an observer object from the list of registered observers.

Parameters:

observer - An observer object