/*
 * 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.hbase.client;

import org.apache.hadoop.hbase.HConstants;
import org.apache.yetus.audience.InterfaceAudience;

/**
 * A Get, Put, Increment, Append, or Delete associated with it's region. Used internally by
 * {@link Table#batch} to associate the action with it's region and maintain the index from the
 * original request.
 */
@InterfaceAudience.Private
public class Action implements Comparable<Action> {
  private final Row action;
  private final int originalIndex;
  private long nonce = HConstants.NO_NONCE;
  private int replicaId = RegionReplicaUtil.DEFAULT_REPLICA_ID;
  private int priority;

  public Action(Row action, int originalIndex) {
    this(action, originalIndex, HConstants.PRIORITY_UNSET);
  }

  public Action(Row action, int originalIndex, int priority) {
    this.action = action;
    this.originalIndex = originalIndex;
    this.priority = priority;
  }

  /**
   * Creates an action for a particular replica from original action.
   * @param action    Original action.
   * @param replicaId Replica id for the new action.
   */
  public Action(Action action, int replicaId) {
    this.action = action.action;
    this.nonce = action.nonce;
    this.originalIndex = action.originalIndex;
    this.replicaId = replicaId;
  }

  public void setNonce(long nonce) {
    this.nonce = nonce;
  }

  public boolean hasNonce() {
    return nonce != HConstants.NO_NONCE;
  }

  public Row getAction() {
    return action;
  }

  public int getOriginalIndex() {
    return originalIndex;
  }

  public int getReplicaId() {
    return replicaId;
  }

  public int getPriority() {
    return priority;
  }

  @Override
  public int compareTo(Action other) {
    return action.compareTo(other.getAction());
  }

  @Override
  public int hashCode() {
    return this.action.hashCode();
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) return true;
    if (obj instanceof Action) {
      return compareTo((Action) obj) == 0;
    }
    return false;
  }

  public long getNonce() {
    return nonce;
  }
}
