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.cassandra.auth;
  
  import java.io.Serializable;
  import java.security.Principal;
  
  /**
   * <p> This class implements the <code>Principal</code> interface
   * and represents a user.
   *
   * <p> Principals such as this <code>CassPrincipal</code>
   * may be associated with a particular <code>Subject</code>
   * to augment that <code>Subject</code> with an additional
   * identity.  Refer to the <code>Subject</code> class for more information
   * on how to achieve this.  Authorization decisions can then be based upon
   * the Principals associated with a <code>Subject</code>.
   *
   * @see java.security.Principal
   * @see javax.security.auth.Subject
   */
  public class CassandraPrincipal implements Principal, Serializable
  {
  
      /**
       *
       */
      private static final long serialVersionUID = 1L;
      private final String name;
  
      /**
       * Create a CassPrincipal with a username.
       *
       * <p>
       *
       * @param name the username for this user.
       *
       * @exception NullPointerException if the <code>name</code>
       *                  is <code>null</code>.
       */
      public CassandraPrincipal(String name)
      {
          if (name == null)
              throw new NullPointerException("illegal null input");
  
          this.name = name;
      }
  
      /**
       * Return the username for this <code>CassPrincipal</code>.
       *
       * <p>
       *
       * @return the username for this <code>CassPrincipal</code>
       */
      @Override
      public String getName()
      {
          return name;
      }
  
      /**
       * Return a string representation of this <code>CassPrincipal</code>.
       *
       * <p>
       *
       * @return a string representation of this <code>CassPrincipal</code>.
       */
      @Override
      public String toString()
      {
          return ("CassandraPrincipal: " + name);
      }
  
      /**
       * Compares the specified Object with this <code>CassPrincipal</code>
       * for equality.  Returns true if the given object is also a
       * <code>CassPrincipal</code> and the two CassPrincipals
       * have the same username.
       *
       * <p>
       *
       * @param o Object to be compared for equality with this
       *          <code>CassPrincipal</code>.
       *
       * @return true if the specified Object is equal equal to this
       *          <code>CassPrincipal</code>.
       */
      @Override
      public boolean equals(Object o)
      {
          if (o == null)
              return false;
  
          if (this == o)
              return true;
  
          if (!(o instanceof CassandraPrincipal))
              return false;
          CassandraPrincipal that = (CassandraPrincipal) o;
  
          if (this.getName().equals(that.getName()))
              return true;
          return false;
      }
  
      /**
       * Return a hash code for this <code>CassPrincipal</code>.
       *
       * <p>
       *
       * @return a hash code for this <code>CassPrincipal</code>.
       */
      @Override
      public int hashCode()
      {
          return name.hashCode();
      }
  }
  