| /* |
| * |
| * 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; |
| |
| /** |
| * Entry point for external libraries to add event types. Event types should be |
| * <code>final static</code> fields. EventType instances are compared by |
| * reference. |
| * <p> |
| * Event types are best described by an <code>enum</code> that implements the |
| * {@link EventType} interface, see {@link Event.Type}. |
| * |
| */ |
| public interface EventType { |
| |
| /** |
| * @return false if this particular EventType instance does not represent a |
| * real event type but a guard value, example: extra enum value for |
| * switch statements, see {@link Event.Type#NON_CORE_EVENT} |
| */ |
| public boolean isValid(); |
| } |