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.servicemix.jbi.security;
018    
019    import java.security.Principal;
020    
021    
022    /**
023     * This principal represents a group against which authorizations are
024     * usually checked.
025     *  
026     */
027    public class GroupPrincipal implements Principal {
028    
029        public static final GroupPrincipal ANY = new GroupPrincipal("*"); 
030        
031        private final String name;
032        private transient int hash;
033    
034        public GroupPrincipal(String name) {
035            if (name == null) {
036                throw new IllegalArgumentException("name cannot be null");
037            }
038            this.name = name;
039        }
040    
041        public String getName() {
042            return name;
043        }
044    
045        public boolean equals(Object o) {
046            if (this == o) {
047                return true;
048            }
049            if (o == null || getClass() != o.getClass()) {
050                return false;
051            }
052            final GroupPrincipal that = (GroupPrincipal) o;
053            if (!name.equals(that.name)) {
054                return false;
055            }
056            return true;
057        }
058    
059        public int hashCode() {
060            if (hash == 0) {
061                hash = name.hashCode();
062            }
063            return hash;
064        }
065    
066        public String toString() {
067            return name;
068        }
069    }