content: /*
   * 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.ambari.server.state.kerberos;
  
  /**
   * KerberosPrincipalType enumerates the different types of expected Kerberos principals
   */
  public enum KerberosPrincipalType {
    /**
     * User principal.
     * <p/>
     * Typically in the form <code>user@REALM</code>, but may sometimes be in the form
     * <code>user/group@REALM</code>.
     */
    USER,
  
    /**
     * Service principal.
     * <p/>
     * Typically in the form <code>service/host@REALM</code>.
     */
    SERVICE;
  
    public static KerberosPrincipalType translate(String string) {
      if(string == null)
        return null;
      else {
        string = string.trim();
  
        if(string.isEmpty())
          return null;
        else {
          return valueOf(string.toUpperCase());
        }
      }
    }
  
    public static String translate(KerberosPrincipalType type) {
      return (type == null)
          ? null
          : type.name().toLowerCase();
    }
  }
  