/*
* Copyright (C) 2012, Katy Hilgenberg.
* Special acknowledgments to: Knowledge & Data Engineering Group, University of Kassel (http://www.kde.cs.uni-kassel.de).
* Contact: sdcf@cs.uni-kassel.de
*
* This file is part of the SDCFramework (Sensor Data Collection Framework) project.
*
* The SDCFramework is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The SDCFramework is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the SDCFramework. If not, see <http://www.gnu.org/licenses/>.
*/
package de.unikassel.android.sdcframework.util.facade;
/**
* Interface for classes allowing the registration of event observers.<br/>
* A class implementing this interface will usually delegate to other classes
* implementing the ObservableEventSource interface.
*
* @see ObservableEventSource
* @author Katy Hilgenberg
* @param <T>
* the observed event type extending {@linkplain ObservableEvent}
*/
public interface ObserverRegistration< T extends ObservableEvent >
{
/**
* Does register an observer
*
* @param observer
* the observer to add
*/
public abstract void registerEventObserver(
EventObserver< ? extends T > observer );
/**
* Does delete a registered observer
*
* @param observer
* the observer to delete
*/
public abstract void unregisterEventObserver(
EventObserver< ? extends T > observer );
/**
* Does remove all registered observers
*/
public abstract void removeAllObservers();
}