ReplyStatus.java

/**
 * Copyright 2016-2018 Dell Inc. or its subsidiaries. All rights reserved.
 *
 * <p>Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file
 * except in compliance with the License. A copy of the License is located at
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 * <p>or in the "license" file accompanying this file. This file 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 com.emc.ecs.nfsclient.rpc;

import java.util.HashMap;
import java.util.Map;

/**
 * Status distinguishing accepted and denied RPC replies.
 *
 * @author seibed
 */
public class ReplyStatus extends RpcStatus {

  private static final long serialVersionUID = 1L;

  /** Accepted - reply status specified by RFC 1831 (https://tools.ietf.org/html/rfc1831). */
  public static final ReplyStatus MSG_ACCEPTED = new ReplyStatus(0, "MSG_ACCEPTED");

  /** Denied - reply status specified by RFC 1831 (https://tools.ietf.org/html/rfc1831). */
  public static final ReplyStatus MSG_DENIED = new ReplyStatus(1, "MSG_DENIED");

  /** Preset values. */
  private static final Map<Integer, ReplyStatus> VALUES = new HashMap<Integer, ReplyStatus>();

  static {
    addValues(new ReplyStatus[] {MSG_ACCEPTED, MSG_DENIED});
  }

  /**
   * Convenience function to get the instance from the int status value.
   *
   * @param value The int status value.
   * @return The instance.
   */
  public static ReplyStatus fromValue(int value) {
    ReplyStatus status = VALUES.get(value);
    if (status == null) {
      status = new ReplyStatus(value);
      VALUES.put(value, status);
    }
    return status;
  }

  /**
   * @param values Instances to add.
   */
  private static void addValues(ReplyStatus[] values) {
    for (ReplyStatus value : values) {
      VALUES.put(value.getValue(), value);
    }
  }

  /** Create the instance from the int status value. */
  private final String _name;

  private ReplyStatus(int value) {
    this(value, "UNKNOWN_REPLYSTATUS");
  }

  private ReplyStatus(int value, String name) {
    super(value);
    _name = name;
  }

  @Override
  public String toString() {
    return _name + "(" + getValue() + ")";
  }
}