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Apache Hadoop Common

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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.fs;

import java.io.Serializable;
import java.nio.ByteBuffer;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;

/**
 * Opaque, serializable reference to a part id for multipart uploads.
 */
@InterfaceAudience.Public
@InterfaceStability.Evolving
public interface PartHandle extends Serializable {
  /**
   * @return Serialized from in bytes.
   */
  default byte[] toByteArray() {
    ByteBuffer bb = bytes();
    byte[] ret = new byte[bb.remaining()];
    bb.get(ret);
    return ret;
  }

  ByteBuffer bytes();

  @Override
  boolean equals(Object other);
}