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 */
017package org.apache.activemq.jaas;
018
019import java.security.Principal;
020
021/**
022 * @version $Rev: $ $Date: $
023 */
024public 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}