001    /**
002     *
003     * Licensed to the Apache Software Foundation (ASF) under one or more
004     * contributor license agreements.  See the NOTICE file distributed with
005     * this work for additional information regarding copyright ownership.
006     * The ASF licenses this file to You under the Apache License, Version 2.0
007     * (the "License"); you may not use this file except in compliance with
008     * the License.  You may obtain a copy of the License at
009     *
010     * http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    package org.apache.activemq.jaas;
019    
020    import java.security.Principal;
021    
022    
023    /**
024     * @version $Rev: $ $Date: $
025     */
026    public class UserPrincipal implements Principal {
027    
028        private final String name;
029        private transient int hash;
030    
031        public UserPrincipal(String name) {
032            if (name == null) throw new IllegalArgumentException("name cannot be null");
033            this.name = name;
034        }
035    
036        public String getName() {
037            return name;
038        }
039    
040        public boolean equals(Object o) {
041            if (this == o) return true;
042            if (o == null || getClass() != o.getClass()) return false;
043    
044            final UserPrincipal that = (UserPrincipal) o;
045    
046            if (!name.equals(that.name)) return false;
047    
048            return true;
049        }
050    
051        public int hashCode() {
052            if (hash == 0) {
053                hash = name.hashCode();
054            }
055            return hash;
056        }
057    
058        public String toString() {
059            return name;
060        }
061    }