Source Code Cross Referenced for PackageProperties.java in  » 6.0-JDK-Modules » java-3d » com » db » version » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » java 3d » com.db.version 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *
003:         * Copyright (c) 2000-2001 Silvere Martin-Michiellot All Rights Reserved.
004:         *
005:         * Silvere Martin-Michiellot grants you ("Licensee") a non-exclusive,
006:         * royalty free, license to use, modify but not to redistribute this
007:         * software in source and binary code form,
008:         * provided that i) this copyright notice and license appear on all copies of
009:         * the software; and ii) Licensee does not utilize the software in a manner
010:         * which is disparaging to Silvere Martin-Michiellot.
011:         *
012:         * This software is provided "AS IS," without a warranty of any kind. ALL
013:         * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
014:         * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
015:         * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. Silvere Martin-Michiellot
016:         * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES
017:         * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
018:         * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL
019:         * Silvere Martin-Michiellot OR ITS LICENSORS BE LIABLE
020:         * FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
021:         * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
022:         * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
023:         * OR INABILITY TO USE SOFTWARE, EVEN IF Silvere Martin-Michiellot HAS BEEN
024:         * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
025:         *
026:         * This software is not designed or intended for use in on-line control of
027:         * aircraft, air traffic, aircraft navigation or aircraft communications; or in
028:         * the design, construction, operation or maintenance of any nuclear
029:         * facility. Licensee represents and warrants that it will not use or
030:         * redistribute the Software for such purposes.
031:         *
032:         * @Author: Silvere Martin-Michiellot
033:         *
034:         */
035:
036:        package com.db.version;
037:
038:        // This code is repackaged and enhanced after the calss Version from Mark Hale
039:        // Site http://jsci.sourceforge.net/
040:        // Email m.hale@qmul.ac.uk
041:
042:        import java.io.*;
043:        import java.net.*;
044:        import java.util.ResourceBundle;
045:
046:        /**
047:         * The PackageProperties class contains information about the current and latest release.
048:         * This information is not stored in the manifest but in a specific PackageProperties.properties file. You may also want to use the class java.lang.Package.
049:         */
050:        public final class PackageProperties extends Object implements 
051:                Serializable {
052:
053:            /**
054:             * Major version number.
055:             */
056:            public final int major;
057:
058:            /**
059:             * Minor version number.
060:             */
061:            public final int minor;
062:
063:            /**
064:             * Java platform required.
065:             */
066:            public final String platform;
067:
068:            /**
069:             * The URL for the home of this version.
070:             */
071:            public final String home;
072:
073:            /**
074:             * The list of authors who contributed to this version.
075:             */
076:            public final String authors;
077:
078:            /**
079:             * The email to contact the developers of the package.
080:             */
081:            public final String email;
082:
083:            /**
084:             * The description of the contents of this version.
085:             */
086:            public final String description;
087:
088:            /**
089:             * Gets the current version.
090:             */
091:            public static PackageProperties getCurrent() {
092:
093:                ResourceBundle bundle = ResourceBundle
094:                        .getBundle("com.db.version.PackageProperties");
095:                int major = Integer.parseInt(bundle.getString("version.major"));
096:                int minor = Integer.parseInt(bundle.getString("version.minor"));
097:                String platform = bundle.getString("version.platform");
098:                String home = bundle.getString("version.home");
099:                String email = bundle.getString("version.contactemail");
100:                String description = bundle.getString("version.contents");
101:                String authors = bundle.getString("version.authors");
102:
103:                return new PackageProperties(major, minor, platform, home,
104:                        email, description, authors);
105:
106:            }
107:
108:            /**
109:             * Retrieves the latest version from the home URL.
110:             */
111:            public static PackageProperties getLatest() throws IOException {
112:
113:                PackageProperties latest = null;
114:                try {
115:                    URL serurl = new URL(getCurrent().home + "version.ser");
116:                    ObjectInputStream in = new ObjectInputStream(serurl
117:                            .openStream());
118:                    latest = (PackageProperties) in.readObject();
119:                    in.close();
120:                } catch (MalformedURLException murle) {
121:                } catch (ClassNotFoundException cnfe) {
122:                }
123:
124:                return latest;
125:
126:            }
127:
128:            /**
129:             * Constructs a version object.
130:             */
131:            private PackageProperties(int major, int minor, String platform,
132:                    String home, String contactemail, String contents,
133:                    String authors) {
134:
135:                this .major = major;
136:                this .minor = minor;
137:                this .platform = platform;
138:                this .home = home;
139:                this .email = contactemail;
140:                this .description = contents;
141:                this .authors = authors;
142:
143:            }
144:
145:            /**
146:             * Compares two versions for equality.
147:             */
148:            public boolean equals(Object o) {
149:
150:                if (!(o instanceof  PackageProperties))
151:                    return false;
152:                PackageProperties ver = (PackageProperties) o;
153:                return (major == ver.major) && (minor == ver.minor)
154:                        && platform.equals(ver.platform);
155:
156:            }
157:
158:            /**
159:             * Returns the version number as a string.
160:             */
161:            public String toString() {
162:
163:                return new StringBuffer().append(major).append('.').append(
164:                        minor).toString();
165:
166:            }
167:
168:            /**
169:             * Returns true if this is later than another version.
170:             */
171:            public boolean isLater(PackageProperties ver) {
172:
173:                return (major > ver.major)
174:                        || (major == ver.major && minor > ver.minor);
175:
176:            }
177:
178:        }
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