playn.core.util.Callback Maven / Gradle / Ivy
/**
* Copyright 2011 The PlayN Authors
*
* Licensed 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 playn.core.util;
/**
* Used to communicate asynchronous results.
*/
public interface Callback
{
/** A callback that chains failure to the supplied delegate callback. */
public static abstract class Chain implements Callback {
private Callback onFailure;
public Chain(Callback onFailure) {
this.onFailure = onFailure;
}
@Override
public void onFailure(Throwable cause) {
onFailure.onFailure(cause);
}
}
/**
* Called when the asynchronous request succeeded, supplying its result.
*/
void onSuccess(T result);
/**
* Called when the asynchronous request failed, supplying a cause for failure.
*/
void onFailure(Throwable cause);
}