/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.hive.ql.exec.tez;
import java.io.IOException;
/**
* Key-values interface for the Reader used by ReduceRecordSource
*/
public interface KeyValuesAdapter {
/**
* Get the key for current record
* @return
* @throws IOException
*/
Object getCurrentKey() throws IOException;
/**
* Get the values for the current record
* @return
* @throws IOException
*/
Iterable<Object> getCurrentValues() throws IOException;
/**
* Move to the next record
* @return true if successful, false if there are no more records to process
* @throws IOException
*/
boolean next() throws IOException;
}