| /** |
| * 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.crypto; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| |
| /** |
| * Versions of the client/server protocol used for HDFS encryption. |
| */ |
| @InterfaceAudience.Private |
| public enum CryptoProtocolVersion { |
| UNKNOWN("Unknown", 1), |
| ENCRYPTION_ZONES("Encryption zones", 2); |
| |
| private final String description; |
| private final int version; |
| private Integer unknownValue = null; |
| |
| private static CryptoProtocolVersion[] supported = {ENCRYPTION_ZONES}; |
| |
| /** |
| * @return Array of supported protocol versions. |
| */ |
| public static CryptoProtocolVersion[] supported() { |
| return supported; |
| } |
| |
| CryptoProtocolVersion(String description, int version) { |
| this.description = description; |
| this.version = version; |
| } |
| |
| /** |
| * Returns if a given protocol version is supported. |
| * |
| * @param version version number |
| * @return true if the version is supported, else false |
| */ |
| public static boolean supports(CryptoProtocolVersion version) { |
| if (version.getVersion() == UNKNOWN.getVersion()) { |
| return false; |
| } |
| for (CryptoProtocolVersion v : CryptoProtocolVersion.values()) { |
| if (v.getVersion() == version.getVersion()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public void setUnknownValue(int unknown) { |
| this.unknownValue = unknown; |
| } |
| |
| public int getUnknownValue() { |
| return unknownValue; |
| } |
| |
| public String getDescription() { |
| return description; |
| } |
| |
| public int getVersion() { |
| return version; |
| } |
| |
| @Override |
| public String toString() { |
| return "CryptoProtocolVersion{" + |
| "description='" + description + '\'' + |
| ", version=" + version + |
| ", unknownValue=" + unknownValue + |
| '}'; |
| } |
| } |