org.apache.hadoop.hive.ql.exec.persistence.AbstractMapJoinKey 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.persistence;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;

/**
 * Map Join Object used for both key.
 */
public abstract class AbstractMapJoinKey implements Externalizable {

  protected static int metadataTag = -1;

  public AbstractMapJoinKey() {
  }

  @Override
  public abstract boolean equals(Object o);

  @Override
  public abstract int hashCode();

  public abstract void readExternal(ObjectInput in) throws IOException, ClassNotFoundException;

  public abstract void writeExternal(ObjectOutput out) throws IOException;

  public abstract boolean hasAnyNulls(boolean[] nullsafes);

}