HiveSpec.java

/*
 * 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 gobblin.hive.spec;

import org.apache.hadoop.fs.Path;

import com.google.common.base.Optional;

import gobblin.annotation.Alpha;
import gobblin.hive.HivePartition;
import gobblin.hive.HiveTable;


/**
 * An specification for Hive registration.
 */
@Alpha
public interface HiveSpec {

  /**
   * Get the {@link Path} to be registered in Hive.
   */
  public Path getPath();

  /**
   * Get the Hive {@link HiveTable} that the {@link Path} returned by {@link #getPath()} should be registered to.
   */
  public HiveTable getTable();

  /**
   * Get the Hive {@link HivePartition} that the {@link Path} returned by {@link #getPath()} should be registered to.
   *
   * @return {@link Optional#absent()} indicates the {@link Path} in this HiveSpec should be registered as
   * a Hive table. Otherwise, the {@link Path} should be registered as a Hive partition.
   */
  public Optional<HivePartition> getPartition();
}