Source Code Cross Referenced for ForumPermissions.java in  » Forum » nemesis-forum » org » nemesis » forum » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Forum » nemesis forum » org.nemesis.forum 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * NEMESIS-FORUM.
003:         * Copyright (C) 2002  David Laurent(lithium2@free.fr). All rights reserved.
004:         * 
005:         * Copyright (c) 2000 The Apache Software Foundation. All rights reserved.
006:         * 
007:         * Copyright (C) 2001 Yasna.com. All rights reserved.
008:         * 
009:         * Copyright (C) 2000 CoolServlets.com. All rights reserved.
010:         * 
011:         * NEMESIS-FORUM. is free software; you can redistribute it and/or
012:         * modify it under the terms of the Apache Software License, Version 1.1,
013:         * or (at your option) any later version.
014:         * 
015:         * NEMESIS-FORUM core framework, NEMESIS-FORUM backoffice, NEMESIS-FORUM frontoffice
016:         * application are parts of NEMESIS-FORUM and are distributed under
017:         * same terms of licence.
018:         * 
019:         * 
020:         * NEMESIS-FORUM includes software developed by the Apache Software Foundation (http://www.apache.org/)
021:         * and software developed by CoolServlets.com (http://www.coolservlets.com).
022:         * and software developed by Yasna.com (http://www.yasna.com).
023:         * 
024:         */
025:
026:        package org.nemesis.forum;
027:
028:        import org.nemesis.forum.config.Constants;
029:        import org.nemesis.forum.util.cache.CacheSizes;
030:        import org.nemesis.forum.util.cache.Cacheable;
031:
032:        /**
033:         * Defines a set of permissions for objects in the forum system that
034:         * users can be granted. Forum permissions are used by the protection
035:         * proxy objects defined for each major component of the system.
036:         */
037:        public class ForumPermissions implements  Cacheable {
038:
039:            private boolean[] values = new boolean[8];
040:
041:            /**
042:             * Factory method to create full permissions.
043:             */
044:            public static ForumPermissions full() {
045:                return new ForumPermissions(true, true, true, true, true, true,
046:                        true, true);
047:            }
048:
049:            /**
050:             * Factory method to create an object with no permissions.
051:             */
052:            public static ForumPermissions none() {
053:                return new ForumPermissions(false, false, false, false, false,
054:                        false, false, false);
055:            }
056:
057:            /**
058:             * Factory method to create an object with read-only permissions.
059:             */
060:            public static ForumPermissions readOnly() {
061:                return new ForumPermissions(true, false, false, false, false,
062:                        false, false, false);
063:            }
064:
065:            /**
066:             * Create a new permissions object with the specified permissions.
067:             */
068:            public ForumPermissions(boolean READ, boolean SYSTEM_ADMIN,
069:                    boolean FORUM_ADMIN, boolean USER_ADMIN,
070:                    boolean GROUP_ADMIN, boolean MODERATOR,
071:                    boolean CREATE_THREAD, boolean CREATE_MESSAGE) {
072:                values[0] = READ;
073:                values[1] = SYSTEM_ADMIN;
074:                values[2] = FORUM_ADMIN;
075:                values[3] = USER_ADMIN;
076:                values[4] = GROUP_ADMIN;
077:                values[5] = MODERATOR;
078:                values[6] = CREATE_THREAD;
079:                values[7] = CREATE_MESSAGE;
080:            }
081:
082:            /**
083:             * Creates a new ForumPermission object by combining two permissions
084:             * objects. The higher permission of each permission type will be used.
085:             */
086:            public ForumPermissions(ForumPermissions perm1,
087:                    ForumPermissions perm2) {
088:                values[0] = perm1.get(0) || perm2.get(0);
089:                values[1] = perm1.get(1) || perm2.get(1);
090:                values[2] = perm1.get(2) || perm2.get(2);
091:                values[3] = perm1.get(3) || perm2.get(3);
092:                values[4] = perm1.get(4) || perm2.get(4);
093:                values[5] = perm1.get(5) || perm2.get(5);
094:                values[6] = perm1.get(6) || perm2.get(6);
095:                values[7] = perm1.get(7) || perm2.get(7);
096:            }
097:
098:            public ForumPermissions(boolean[] permissions) {
099:                this .values = permissions;
100:            }
101:
102:            public String toString() {
103:                StringBuffer buf = new StringBuffer();
104:                for (int i = 0; i < values.length - 1; i++) {
105:                    buf.append(values[i]).append(",");
106:                }
107:                buf.append(values[values.length - 1]);
108:                return buf.toString();
109:            }
110:
111:            /**
112:             * Returns true if the permission of a particular type is allowed.
113:             */
114:            public boolean get(int type) {
115:                if (type < 0 || type > 7) {
116:                    return false;
117:                }
118:                return values[type];
119:            }
120:
121:            /**
122:             * Returns true if the permissions include system or forum admin
123:             * permissions.
124:             */
125:            public boolean isSystemOrForumAdmin() {
126:                return (values[Constants.FORUM_ADMIN] || values[Constants.SYSTEM_ADMIN]);
127:            }
128:
129:            //FROM THE CACHEABLE INTERFACE//
130:
131:            public int getSize() {
132:                //Approximate the size of the object in bytes by calculating the size
133:                //of each field.
134:                int size = 0;
135:                size += CacheSizes.sizeOfObject(); //overhead of object
136:                size += CacheSizes.sizeOfObject(); //ref to array
137:                size += CacheSizes.sizeOfBoolean() * 8; //boolean array vals
138:                return size;
139:            }
140:        }
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