1 /*
2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.lang;
27
28 import java.io.PrintStream;
29 import java.util.Arrays;
30 import java.util.List;
31 import java.util.Optional;
32 import java.util.Properties;
33
34 class VersionProps {
35
36 private static final String launcher_name =
37 "@@LAUNCHER_NAME@@";
38
39 private static final String java_version =
40 "@@VERSION_SHORT@@";
41
42 private static final String java_version_date =
43 "@@VERSION_DATE@@";
44
45 private static final String java_runtime_name =
46 "@@RUNTIME_NAME@@";
47
48 private static final String java_runtime_version =
49 "@@VERSION_STRING@@";
50
51 private static final String VERSION_NUMBER =
52 "@@VERSION_NUMBER@@";
53
54 private static final String VERSION_SPECIFICATION =
55 "@@VERSION_SPECIFICATION@@";
56
57 private static final String VERSION_BUILD =
58 "@@VERSION_BUILD@@";
59
60 private static final String VERSION_PRE =
61 "@@VERSION_PRE@@";
62
63 private static final String VERSION_OPT =
64 "@@VERSION_OPT@@";
65
66 private static final boolean isLTS =
67 "@@VERSION_OPT@@".startsWith("LTS");
68
69 private static final String CLASSFILE_MAJOR_MINOR =
70 "@@VERSION_CLASSFILE_MAJOR@@.@@VERSION_CLASSFILE_MINOR@@";
71
72 private static final String VENDOR_VERSION_STRING =
73 "@@VENDOR_VERSION_STRING@@";
74
75 private static final String vendor_version =
76 (VENDOR_VERSION_STRING.length() > 0
77 ? " " + VENDOR_VERSION_STRING : "");
78
79 private static final String VENDOR =
80 "@@VENDOR@@";
81
82 private static final String VENDOR_URL =
83 "@@VENDOR_URL@@";
84
85 private static final String VENDOR_URL_BUG =
86 "@@VENDOR_URL_BUG@@";
87
88 /**
89 * Initialize system properties using build provided values.
90 *
91 * @param props Properties instance in which to insert the properties
92 */
93 public static void init(Properties props) {
94 props.setProperty("java.version", java_version);
95 props.setProperty("java.version.date", java_version_date);
96 props.setProperty("java.runtime.version", java_runtime_version);
97 props.setProperty("java.runtime.name", java_runtime_name);
98 if (VENDOR_VERSION_STRING.length() > 0)
99 props.setProperty("java.vendor.version", VENDOR_VERSION_STRING);
100
101 props.setProperty("java.class.version", CLASSFILE_MAJOR_MINOR);
102
103 props.setProperty("java.specification.version", VERSION_SPECIFICATION);
104 props.setProperty("java.specification.name", "Java Platform API Specification");
105 props.setProperty("java.specification.vendor", "Oracle Corporation");
106
107 props.setProperty("java.vendor", VENDOR);
108 props.setProperty("java.vendor.url", VENDOR_URL);
109 props.setProperty("java.vendor.url.bug", VENDOR_URL_BUG);
110 }
111
112 private static int parseVersionNumber(String version, int prevIndex, int index) {
113 if (index - prevIndex > 1 &&
114 Character.digit(version.charAt(prevIndex), 10) <= 0)
115 throw new IllegalArgumentException("Leading zeros not supported (" +
116 version.substring(prevIndex, index) + ")");
117 return Integer.parseInt(version, prevIndex, index, 10);
118 }
119
120 // This method is reflectively used by regression tests.
121 static List<Integer> parseVersionNumbers(String version) {
122 // Let's find the size of an array required to hold $VNUM components
123 int size = 0;
124 int prevIndex = 0;
125 do {
126 prevIndex = version.indexOf('.', prevIndex) + 1;
127 size++;
128 } while (prevIndex > 0);
129 Integer[] verNumbers = new Integer[size];
130
131 // Fill in the array with $VNUM components
132 int n = 0;
133 prevIndex = 0;
134 int index = version.indexOf('.');
135 while (index > -1) {
136 verNumbers[n] = parseVersionNumber(version, prevIndex, index);
137 prevIndex = index + 1; // Skip the period
138 index = version.indexOf('.', prevIndex);
139 n++;
140 }
141 verNumbers[n] = parseVersionNumber(version, prevIndex, version.length());
142
143 if (verNumbers[0] == 0 || verNumbers[n] == 0)
144 throw new IllegalArgumentException("Leading/trailing zeros not allowed (" +
145 Arrays.toString(verNumbers) + ")");
146
147 return List.of(verNumbers);
148 }
149
150 static List<Integer> versionNumbers() {
151 return parseVersionNumbers(VERSION_NUMBER);
152 }
153
154 static Optional<String> pre() {
155 return optionalOf(VERSION_PRE);
156 }
157
158 static Optional<Integer> build() {
159 return VERSION_BUILD.isEmpty() ?
160 Optional.empty() :
161 Optional.of(Integer.parseInt(VERSION_BUILD));
162 }
163
164 static Optional<String> optional() {
165 return optionalOf(VERSION_OPT);
166 }
167
168 // Treat empty strings as value not being present
169 private static Optional<String> optionalOf(String value) {
170 if (!value.isEmpty()) {
171 return Optional.of(value);
172 } else {
173 return Optional.empty();
174 }
175 }
176
177 /**
178 * In case you were wondering this method is called by java -version.
179 */
180 public static void print(boolean err) {
181 print(err, false);
182 }
183
184 /**
185 * This is the same as print except that it adds an extra line-feed
186 * at the end, typically used by the -showversion in the launcher
187 */
188 public static void println(boolean err) {
189 print(err, true);
190 }
191
192 /**
193 * Print version info.
194 */
195 private static void print(boolean err, boolean newln) {
196 PrintStream ps = err ? System.err : System.out;
197
198 /* First line: platform version. */
199 if (err) {
200 ps.println(launcher_name + " version \"" + java_version + "\""
201 + " " + java_version_date
202 + (isLTS ? " LTS" : ""));
203 } else {
204 /* Use a format more in line with GNU conventions */
205 ps.println(launcher_name + " " + java_version
206 + " " + java_version_date
207 + (isLTS ? " LTS" : ""));
208 }
209
210 /* Second line: runtime version (ie, libraries). */
211 String jdk_debug_level = System.getProperty("jdk.debug", "release");
212 if ("release".equals(jdk_debug_level)) {
213 /* Do not show debug level "release" builds */
214 jdk_debug_level = "";
215 } else {
216 jdk_debug_level = jdk_debug_level + " ";
217 }
218
219 ps.println(java_runtime_name + vendor_version
220 + " (" + jdk_debug_level + "build " + java_runtime_version + ")");
221
222 /* Third line: JVM information. */
223 String java_vm_name = System.getProperty("java.vm.name");
224 String java_vm_version = System.getProperty("java.vm.version");
225 String java_vm_info = System.getProperty("java.vm.info");
226 ps.println(java_vm_name + vendor_version
227 + " (" + jdk_debug_level + "build " + java_vm_version + ", "
228 + java_vm_info + ")");
229
230 }
231
232 }