001/*
002 * GWTEventService
003 * Copyright (c) 2011 and beyond, strawbill UG (haftungsbeschr?nkt)
004 *
005 * This is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU Lesser General Public License as
007 * published by the Free Software Foundation; either version 3 of
008 * the License, or (at your option) any later version.
009 * Other licensing for GWTEventService may also be possible on request.
010 * Please view the license.txt of the project for more information.
011 *
012 * This software is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this software; if not, write to the Free
019 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
021 */
022package de.novanic.eventservice.client.connection.callback;
023
024import com.google.gwt.user.client.rpc.AsyncCallback;
025
026/**
027 * Simple wrapper class to wrap another callback. That makes it possible to execute custom actions before or after
028 * the wrapped callback is called.
029 *
030 * @author sstrohschein
031 *         <br>Date: 02.08.2010
032 *         <br>Time: 21:23:09
033 */
034public class AsyncCallbackWrapper<T> implements AsyncCallback<T>
035{
036    private final AsyncCallback<T> myAsyncCallback;
037
038    public AsyncCallbackWrapper(AsyncCallback<T> anAsyncCallback) {
039        myAsyncCallback = anAsyncCallback;
040    }
041
042    public void onSuccess(T anObject) {
043        if(myAsyncCallback != null) {
044            myAsyncCallback.onSuccess(anObject);
045        }
046    }
047
048    public void onFailure(Throwable aThrowable) {
049        if(myAsyncCallback != null) {
050            myAsyncCallback.onFailure(aThrowable);
051        }
052    }
053
054    protected AsyncCallback<T> getCallback() {
055        return myAsyncCallback;
056    }
057}