/*
 * 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.wire;

import alluxio.annotation.PublicApi;
import alluxio.thrift.TTtlAction;

import javax.annotation.concurrent.ThreadSafe;

/**
 * Represents the file action to take when its TTL expires.
 *
 */
@PublicApi
@ThreadSafe
public enum TtlAction {

  /**
   * Indicates that the file should be deleted (both in Alluxio and UFS).
   */
  DELETE,

  /**
   * Indicates that the file should be freed (i.e. deleted in Alluxio but not in UFS).
   */
  FREE;

  /**
   * Converts thrift type to wire type.
   *
   * @param tTtlAction {@link TTtlAction}
   * @return {@link TtlAction} equivalent
   */
  public static TtlAction fromThrift(TTtlAction tTtlAction) {
    if (tTtlAction == null) {
      return TtlAction.DELETE;
    }
    switch (tTtlAction) {
      case Delete:
        return TtlAction.DELETE;
      case Free:
        return TtlAction.FREE;
      default:
        throw new IllegalStateException("Unrecognized thrift ttl action: " + tTtlAction);
    }
  }

  /**
   * Converts wire type to thrift type.
   *
   * @param ttlAction {@link TtlAction}
   * @return {@link TTtlAction} equivalent
   */
  public static TTtlAction toThrift(TtlAction ttlAction) {
    if (ttlAction == null) {
      return TTtlAction.Delete;
    }
    switch (ttlAction) {
      case DELETE:
        return TTtlAction.Delete;
      case FREE:
        return TTtlAction.Free;
      default:
        throw new IllegalStateException("Unrecognized ttl action: " + ttlAction);
    }
  }
}