org.apache.hadoop.hive.ql.exec.RecordReader Maven / Gradle / Ivy

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/**
 * 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;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Writable;

/**
 * RecordReader.
 *
 */
public interface RecordReader {

  void initialize(InputStream in, Configuration conf, Properties tbl) throws IOException;

  Writable createRow() throws IOException;

  /**
   * Returns the number of bytes that we consumed.
   * -1 means end of stream.
   */
  int next(Writable row) throws IOException;

  void close() throws IOException;
}