| /* |
| 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.wiki.workflow; |
| |
| import org.apache.wiki.event.WikiEventListener; |
| import org.apache.wiki.event.WikiEventManager; |
| import org.apache.wiki.event.WorkflowEvent; |
| |
| import java.util.Set; |
| |
| |
| /** |
| * Emits all kind of {@link WorkflowEvent}s. |
| */ |
| public enum WorkflowEventEmitter { |
| |
| INSTANCE; |
| |
| public static WorkflowEventEmitter get() { |
| return INSTANCE; |
| } |
| |
| public static void fireEvent( final Object src, final int type ) { |
| if ( WikiEventManager.isListening( get() ) ) { |
| WikiEventManager.fireEvent( get(), new WorkflowEvent( src, type ) ); |
| } |
| } |
| |
| public static void registerListener( final WikiEventListener listener ) { |
| if ( WikiEventManager.isListening( get() ) ) { |
| final Set< WikiEventListener > attachedListeners = WikiEventManager.getWikiEventListeners( get() ); |
| attachedListeners.stream() |
| .filter( l -> listener.getClass().isAssignableFrom( l.getClass() ) ) |
| .forEach( WikiEventManager::removeWikiEventListener ); |
| } |
| WikiEventManager.addWikiEventListener( WorkflowEventEmitter.get(), listener ); |
| } |
| |
| } |