/*
* Copyright (c) 2012, Codename One and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Codename One designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Codename One through http://www.codenameone.com/ if you
* need additional information or have any questions.
*/
package com.codename1.util;
/**
* <p>Simple interface that allows asynchronous code to perform a parameterized callback
* in a similar way to GWT's callback interface. This is the base interface for {@link com.codename1.util.Callback}
*where the logic is broken down to single method interfaces so Java 8 lambdas can be used.</p>
*
* @author Shai Almog
*/
public interface FailureCallback<T> {
/**
* Invoked when the async method throws an exception
* @param sender the source of the error e.g. connection request that triggered the error, could be null
* @param err in case of an error triggered by an exception
* @param errorCode if applicable e.g. with http error codes, -1 for unknown
* @param errorMessage if applicable a user displayable message (can be null)
*/
public void onError(Object sender, Throwable err, int errorCode, String errorMessage);
}