| /****************************************************************************** |
| * Copyright (c) 2008 Oracle |
| * 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 - initial implementation and ongoing maintenance |
| ******************************************************************************/ |
| |
| package org.eclipse.wst.common.project.facet.core.util; |
| |
| /** |
| * Interface for implementing filters for various object types. |
| * |
| * @since 3.0 |
| * @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a> |
| */ |
| |
| public interface IFilter<T> |
| { |
| interface IFilterEvent<T> |
| { |
| enum Type |
| { |
| FILTER_CHANGED |
| } |
| |
| Type getType(); |
| IFilter<T> getFilter(); |
| } |
| |
| interface IFilterListener<T> |
| { |
| void handleEvent( IFilterEvent<T> event ); |
| } |
| |
| /** |
| * The method that is called to let the filter make the determination whether an object |
| * passes through the filter. |
| * |
| * @param object the object that the filter should check |
| * @return <code>true</code> if the object passes through the filter and |
| * <code>false</code> otherwise |
| */ |
| |
| boolean check( T object ); |
| |
| void addListener( IFilterListener<T> listener, |
| IFilterEvent.Type... types ); |
| |
| void removeListener( IFilterListener<T> listener ); |
| |
| } |