/*
* The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
* (the "License"). You may not use this work except in compliance with the License, which is
* available at www.apache.org/licenses/LICENSE-2.0
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied, as more fully set forth in the License.
*
* See the NOTICE file distributed with this work for information regarding copyright ownership.
*/
package alluxio.client.keyvalue;
import alluxio.annotation.PublicApi;
import alluxio.exception.AlluxioException;
import java.io.IOException;
/**
* Iterator to iterate over key-value pairs in {@link KeyValueSystem} or its partitions.
*/
@PublicApi
public interface KeyValueIterator {
/**
* @return true if the iterator has more key-value pairs, otherwise false
*/
boolean hasNext();
/**
* Throws a {@link java.util.NoSuchElementException} if there are no more pairs.
*
* @return the next key-value pair in the iteration
*/
KeyValuePair next() throws IOException, AlluxioException;
}