GenericEntityNotifier.java

package fr.openwide.core.jpa.business.generic.listener;

import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;

import fr.openwide.core.jpa.business.generic.model.GenericEntity;
import fr.openwide.core.jpa.exception.SecurityServiceException;
import fr.openwide.core.jpa.exception.ServiceException;

public class GenericEntityNotifier<K extends Serializable & Comparable<K>, E extends GenericEntity<K, E>, L extends GenericEntityListener<K, E>> {

	protected Set<L> listeners = new HashSet<L>();

	public void subscribe(L listener) {
		this.listeners.add(listener);
	}

	public void unsubscribe(L listener) {
		if (this.listeners.contains(listener)) {
			this.listeners.remove(listener);
		}
	}
	
	public void onCreate(E entity) throws ServiceException, SecurityServiceException {
		for (L listener : listeners) {
			listener.onCreate(entity);
		}
	}
	
	public void onUpdate(E entity) throws ServiceException, SecurityServiceException {
		for (L listener : listeners) {
			listener.onUpdate(entity);
		}
	}
	
	public void onDelete(E entity) throws ServiceException, SecurityServiceException {
		for (L listener : listeners) {
			listener.onDelete(entity);
		}
	}

}