001/*
002 * GWTEventService
003 * Copyright (c) 2011 and beyond, strawbill UG (haftungsbeschr?nkt)
004 *
005 * This is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU Lesser General Public License as
007 * published by the Free Software Foundation; either version 3 of
008 * the License, or (at your option) any later version.
009 * Other licensing for GWTEventService may also be possible on request.
010 * Please view the license.txt of the project for more information.
011 *
012 * This software is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this software; if not, write to the Free
019 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
021 */
022package de.novanic.eventservice.client.event.filter;
023
024/**
025 * AppendableEventFilter ensures that the {@link de.novanic.eventservice.client.event.filter.EventFilter} can handle more
026 * attached {@link de.novanic.eventservice.client.event.filter.EventFilter} instances. Depending on the implementation
027 * of the AppendableEventFilter, the method
028 * {@link de.novanic.eventservice.client.event.filter.EventFilter#match(de.novanic.eventservice.client.event.Event)} of the
029 * super class must be called first, when the method is overwritten.
030 *
031 * @author sstrohschein
032 *         <br>Date: 04.03.2009
033 *         <br>Time: 20:18:01
034 */
035public interface AppendableEventFilter extends EventFilter
036{
037    /**
038     * Appends another {@link de.novanic.eventservice.client.event.filter.EventFilter} which should also be used/called from the match method
039     * ({@link de.novanic.eventservice.client.event.filter.EventFilter#match(de.novanic.eventservice.client.event.Event)}).
040     * @param anEventFilter {@link de.novanic.eventservice.client.event.filter.EventFilter} to attach
041     * @return the created AppendableEventFilter (to attach more {@link de.novanic.eventservice.client.event.filter.EventFilter} instances)
042     */
043    AppendableEventFilter attach(EventFilter anEventFilter);
044}