| /****************************************************************************** |
| * Copyright (c) 2005-2007 BEA Systems, Inc. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Konstantin Komissarchik |
| ******************************************************************************/ |
| |
| package org.eclipse.wst.common.project.facet.ui.internal; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * @author <a href="mailto:kosta@bea.com">Konstantin Komissarchik</a> |
| */ |
| |
| public abstract class AbstractDataModel |
| { |
| private final Map<String,List<IDataModelListener>> listeners |
| = new HashMap<String,List<IDataModelListener>>(); |
| |
| public synchronized void addListener( final String event, |
| final IDataModelListener listener ) |
| { |
| List<IDataModelListener> list = this.listeners.get( event ); |
| |
| if( list == null ) |
| { |
| list = new ArrayList<IDataModelListener>(); |
| this.listeners.put( event, list ); |
| } |
| |
| list.add( listener ); |
| } |
| |
| public synchronized void removeListener( final String event, |
| final IDataModelListener listener ) |
| { |
| final List<IDataModelListener> list = this.listeners.get( event ); |
| |
| if( list != null ) |
| { |
| list.remove( listener ); |
| } |
| } |
| |
| public synchronized void removeListener( final IDataModelListener listener ) |
| { |
| for( String property : this.listeners.keySet() ) |
| { |
| removeListener( property, listener ); |
| } |
| } |
| |
| protected void notifyListeners( final String event ) |
| { |
| final List<IDataModelListener> listeners = this.listeners.get( event ); |
| |
| if( listeners != null ) |
| { |
| for( IDataModelListener listener : listeners ) |
| { |
| listener.handleEvent(); |
| } |
| } |
| } |
| |
| public static interface IDataModelListener |
| { |
| void handleEvent(); |
| } |
| |
| } |