com.facebook.hive.orc.compression.CompressionCodec Maven / Gradle / Ivy

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//  Copyright (c) 2013, Facebook, Inc.  All rights reserved.

/**
 * 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 com.facebook.hive.orc.compression;

import java.io.IOException;
import java.nio.ByteBuffer;

import org.apache.hadoop.conf.Configuration;

public interface CompressionCodec {
  /**
   * Compress the in buffer to the out buffer.
   * @param in the bytes to compress
   * @param out the uncompressed bytes
   * @param overflow put any additional bytes here
   * @return true if the output is smaller than input
   * @throws IOException
   */
  boolean compress(ByteBuffer in, ByteBuffer out, ByteBuffer overflow
                  ) throws IOException;

  /**
   * Decompress the in buffer to the out buffer.
   * @param in the bytes to decompress
   * @param out the decompressed bytes
   * @throws IOException
   */
  void decompress(ByteBuffer in, ByteBuffer out) throws IOException;

  void reloadConfigurations(Configuration conf);
}