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.activemq.jaas;
  
  import java.security.Principal;
  
  /**
   * @version $Rev: $ $Date: $
   */
  public class UserPrincipal implements Principal {
  
      private final String name;
      private transient int hash;
  
      public UserPrincipal(String name) {
          if (name == null) {
              throw new IllegalArgumentException("name cannot be null");
          }
          this.name = name;
      }
  
      @Override
      public String getName() {
          return name;
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) {
              return true;
          }
          if (o == null || getClass() != o.getClass()) {
              return false;
          }
  
          final UserPrincipal that = (UserPrincipal)o;
  
          if (!name.equals(that.name)) {
              return false;
          }
  
          return true;
      }
  
      @Override
      public int hashCode() {
          if (hash == 0) {
              hash = name.hashCode();
          }
          return hash;
      }
  
      @Override
      public String toString() {
          return name;
      }
  }
  