content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.table.common.transform.action;
  
  import java.util.Properties;
  import javax.annotation.Nullable;
  
  /**
   * The action factory interface.
   */
  public interface TransformActionFactory {
  
    /**
     * Returns the order of the transform action. Transform actions with a lower number
     * will be executed before transform actions with a higher number.
     * Behavior is undefined for actions with equal number.
     *
     * @return integer representing order number
     */
    default int getOrder() {
      return 100;
    }
  
    /**
     * Creates a new instance of an action based on the properties. Null should be returned
     * when the particular action is not necessary.
     *
     * @param definition the raw definition of the action
     * @return a new instance of an action
     */
    @Nullable
    TransformAction create(Properties definition);
  }
  