/*
* Copyright (C) 2015 SoftIndex LLC.
*
* 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 io.datakernel.async;
/**
* Represents the callback for iterator, which can process each occurred action with iterator
*
* @param <T>
*/
public abstract class IteratorCallback<T> extends ExceptionCallback {
public final void setNext(T item) {
onNext(item);
}
/**
* Calls after calling next() from iterator, processed received value
*
* @param item received value from iterator
*/
protected abstract void onNext(T item);
/**
* Calls after ending elements in iterator
*/
public final void setEnd() {
CallbackRegistry.complete(this);
onEnd();
}
protected abstract void onEnd();
}