| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.qpid.proton.engine; |
| |
| import java.util.Iterator; |
| |
| |
| /** |
| * Handler |
| * |
| */ |
| |
| public interface Handler |
| { |
| /** |
| * Handle the event in this instance. This is the second half of |
| * {@link Event#dispatch(Handler)}. The method must invoke a concrete onXxx |
| * method for the given event, or invoke it's {@link #onUnhandled(Event)} |
| * method if the {@link EventType} of the event is not recognized by the |
| * handler. |
| * <p> |
| * <b>Note:</b> The handler is not supposed to invoke the |
| * {@link #handle(Event)} method on it's {@link #children()}, that is the |
| * responsibility of the {@link Event#dispatch(Handler)} |
| * |
| * @see BaseHandler |
| * @param e |
| * The event to handle |
| */ |
| void handle(Event e); |
| |
| void onUnhandled(Event e); |
| |
| void add(Handler child); |
| |
| Iterator<Handler> children(); |
| } |