001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.activemq.jaas;
018    
019    import java.security.Principal;
020    
021    /**
022     * @version $Rev: $ $Date: $
023     */
024    public class GroupPrincipal implements Principal {
025    
026        private final String name;
027        private transient int hash;
028    
029        public GroupPrincipal(String name) {
030            if (name == null) {
031                throw new IllegalArgumentException("name cannot be null");
032            }
033            this.name = name;
034        }
035    
036        @Override
037        public String getName() {
038            return name;
039        }
040    
041        @Override
042        public boolean equals(Object o) {
043            if (this == o) {
044                return true;
045            }
046            if (o == null || getClass() != o.getClass()) {
047                return false;
048            }
049    
050            final GroupPrincipal that = (GroupPrincipal)o;
051    
052            if (!name.equals(that.name)) {
053                return false;
054            }
055    
056            return true;
057        }
058    
059        @Override
060        public int hashCode() {
061            if (hash == 0) {
062                hash = name.hashCode();
063            }
064            return hash;
065        }
066    
067        @Override
068        public String toString() {
069            return name;
070        }
071    }