1 /** 2 * This file Copyright (c) 2003-2013 Magnolia International 3 * Ltd. (http://www.magnolia-cms.com). All rights reserved. 4 * 5 * 6 * This file is dual-licensed under both the Magnolia 7 * Network Agreement and the GNU General Public License. 8 * You may elect to use one or the other of these licenses. 9 * 10 * This file is distributed in the hope that it will be 11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the 12 * implied warranty of MERCHANTABILITY or FITNESS FOR A 13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. 14 * Redistribution, except as permitted by whichever of the GPL 15 * or MNA you select, is prohibited. 16 * 17 * 1. For the GPL license (GPL), you can redistribute and/or 18 * modify this file under the terms of the GNU General 19 * Public License, Version 3, as published by the Free Software 20 * Foundation. You should have received a copy of the GNU 21 * General Public License, Version 3 along with this program; 22 * if not, write to the Free Software Foundation, Inc., 51 23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 24 * 25 * 2. For the Magnolia Network Agreement (MNA), this file 26 * and the accompanying materials are made available under the 27 * terms of the MNA which accompanies this distribution, and 28 * is available at http://www.magnolia-cms.com/mna.html 29 * 30 * Any modifications to this file must keep this entire header 31 * intact. 32 * 33 */ 34 package info.magnolia.cms.security; 35 36 import java.io.Serializable; 37 import java.security.Principal; 38 39 /** 40 * Provides the name for the default realm. A realm is a independent set of users. 41 * @author philipp 42 * @version $Id$ 43 */ 44 public interface Realm extends Principal { 45 46 /** 47 * The realm for the admin interface. 48 */ 49 public static final Realm REALM_ADMIN = new RealmImpl("admin"); 50 51 /** 52 * No realm --> all users. 53 */ 54 public static final Realm REALM_ALL = new RealmImpl("all"); 55 56 /** 57 * Contains not removable system users: anonymous, superuser. 58 */ 59 public static final Realm REALM_SYSTEM = new RealmImpl("system"); 60 61 /** 62 * The default realm is {@link Realm#REALM_ALL}. 63 */ 64 public static final Realm DEFAULT_REALM = REALM_ALL; 65 66 /** 67 * Implementation of the realm. Enum would be easier to read, but would not be backward compatible. 68 * @author had 69 * @version $Id$ 70 */ 71 class RealmImpl implements Realm, Serializable { 72 private static final long serialVersionUID = -6739554591784285193L; 73 private final String name; 74 public RealmImpl(String name) { 75 if (name == null) { 76 throw new NullPointerException("Realm name can't be null!"); 77 } 78 this.name = name; 79 } 80 @Override 81 public String getName() { 82 return name; 83 } 84 85 @Override 86 public int hashCode() { 87 return this.name.hashCode(); 88 } 89 90 @Override 91 public boolean equals(Object o) { 92 if (o == null || !(o instanceof Realm) ) { 93 return false; 94 } 95 return this.name.equals(((Realm) o).getName()); 96 } 97 } 98 99 /** 100 * Factory for providing realms. 101 */ 102 public class Factory { 103 public static Realm newRealm(String realmName) { 104 if (REALM_ADMIN.getName().equals(realmName)) return REALM_ADMIN; 105 if (REALM_ALL.getName().equals(realmName)) return REALM_ALL; 106 if (REALM_SYSTEM.getName().equals(realmName)) return REALM_SYSTEM; 107 return new RealmImpl(realmName); 108 } 109 } 110 }