/*
* Copyright 2016 Square Inc.
*
* 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 flow;
/** Supplied by Flow to the Listener, which is responsible for calling onComplete(). */
public interface TraversalCallback {
/**
* Must be called exactly once to indicate that the corresponding transition has completed.
*
* If not called, the history will not be updated and further calls to Flow will not execute.
* Calling more than once will result in an exception.
*/
void onTraversalCompleted();
}