Source Code Cross Referenced for ConfigScope.java in  » Database-DBMS » db4o-6.4 » com » db4o » config » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db4o 6.4 » com.db4o.config 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* Copyright (C) 2004 - 2007  db4objects Inc.  http://www.db4o.com
002:
003:        This file is part of the db4o open source object database.
004:
005:        db4o is free software; you can redistribute it and/or modify it under
006:        the terms of version 2 of the GNU General Public License as published
007:        by the Free Software Foundation and as clarified by db4objects' GPL 
008:        interpretation policy, available at
009:        http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
010:        Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
011:        Suite 350, San Mateo, CA 94403, USA.
012:
013:        db4o is distributed in the hope that it will be useful, but WITHOUT ANY
014:        WARRANTY; without even the implied warranty of MERCHANTABILITY or
015:        FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
016:        for more details.
017:
018:        You should have received a copy of the GNU General Public License along
019:        with this program; if not, write to the Free Software Foundation, Inc.,
020:        59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. */
021:        package com.db4o.config;
022:
023:        import java.io.*;
024:
025:        /**
026:         * Defines a scope of applicability of a config setting.<br><br>
027:         * Some of the configuration settings can be either: <br><br>
028:         * - enabled globally; <br>
029:         * - enabled individually for a specified class; <br>
030:         * - disabled.<br><br>
031:         * @see com.db4o.config.Configuration#generateUUIDs(ConfigScope)
032:         * @see com.db4o.config.Configuration#generateVersionNumbers(ConfigScope)
033:         */
034:        public final class ConfigScope implements  Serializable {
035:
036:            public static final int DISABLED_ID = -1;
037:            public static final int INDIVIDUALLY_ID = 1;
038:            public static final int GLOBALLY_ID = Integer.MAX_VALUE;
039:
040:            private static final String DISABLED_NAME = "disabled";
041:            private static final String INDIVIDUALLY_NAME = "individually";
042:            private static final String GLOBALLY_NAME = "globally";
043:
044:            /**
045:             * Marks a configuration feature as globally disabled.
046:             */
047:            public static final ConfigScope DISABLED = new ConfigScope(
048:                    DISABLED_ID, DISABLED_NAME);
049:
050:            /**
051:             * Marks a configuration feature as individually configurable.
052:             */
053:            public static final ConfigScope INDIVIDUALLY = new ConfigScope(
054:                    INDIVIDUALLY_ID, INDIVIDUALLY_NAME);
055:
056:            /**
057:             * Marks a configuration feature as globally enabled.
058:             */
059:            public static final ConfigScope GLOBALLY = new ConfigScope(
060:                    GLOBALLY_ID, GLOBALLY_NAME);
061:
062:            private final int _value;
063:            private final String _name;
064:
065:            private ConfigScope(int value, String name) {
066:                _value = value;
067:                _name = name;
068:            }
069:
070:            /**
071:             * Checks if the current configuration scope is globally
072:             * enabled or disabled. 
073:             * @param defaultValue - default result 
074:             * @return false if disabled, true if globally enabled, default 
075:             * value otherwise
076:             */
077:            public boolean applyConfig(boolean defaultValue) {
078:                switch (_value) {
079:                case DISABLED_ID:
080:                    return false;
081:                case GLOBALLY_ID:
082:                    return true;
083:                default:
084:                    return defaultValue;
085:                }
086:            }
087:
088:            /**
089:             * @deprecated
090:             */
091:            public static ConfigScope forID(int id) {
092:                switch (id) {
093:                case DISABLED_ID:
094:                    return DISABLED;
095:                case INDIVIDUALLY_ID:
096:                    return INDIVIDUALLY;
097:                }
098:                return GLOBALLY;
099:            }
100:
101:            public boolean equals(Object obj) {
102:                if (this  == obj) {
103:                    return true;
104:                }
105:                if (obj == null || getClass() != obj.getClass()) {
106:                    return false;
107:                }
108:                ConfigScope tb = (ConfigScope) obj;
109:                return _value == tb._value;
110:            }
111:
112:            public int hashCode() {
113:                return _value;
114:            }
115:
116:            private Object readResolve() {
117:                switch (_value) {
118:                case DISABLED_ID:
119:                    return DISABLED;
120:                case INDIVIDUALLY_ID:
121:                    return INDIVIDUALLY;
122:                default:
123:                    return GLOBALLY;
124:                }
125:            }
126:
127:            public String toString() {
128:                return _name;
129:            }
130:        }
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