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_BUILD =
55 "@@VERSION_BUILD@@";
56
57 private static final String VERSION_PRE =
58 "@@VERSION_PRE@@";
59
60 private static final String VERSION_OPT =
61 "@@VERSION_OPT@@";
62
63 private static final boolean isLTS =
64 "@@VERSION_OPT@@".startsWith("LTS");
65
66 private static final String CLASSFILE_MAJOR_MINOR =
67 "@@VERSION_CLASSFILE_MAJOR@@.@@VERSION_CLASSFILE_MINOR@@";
68
69 private static final String VENDOR_VERSION_STRING =
70 "@@VENDOR_VERSION_STRING@@";
71
72 private static final String vendor_version =
73 (VENDOR_VERSION_STRING.length() > 0
74 ? " " + VENDOR_VERSION_STRING : "");
75
76 private static final String VENDOR =
77 "@@VENDOR@@";
78
79 private static final String VENDOR_URL =
80 "@@VENDOR_URL@@";
81
82 private static final String VENDOR_URL_BUG =
83 "@@VENDOR_URL_BUG@@";
84
85 /**
86 * Initialize system properties using build provided values.
87 *
88 * @param props Properties instance in which to insert the properties
89 */
90 public static void init(Properties props) {
91 props.setProperty("java.version", java_version);
92 props.setProperty("java.version.date", java_version_date);
93 props.setProperty("java.runtime.version", java_runtime_version);
94 props.setProperty("java.runtime.name", java_runtime_name);
95 if (VENDOR_VERSION_STRING.length() > 0)
96 props.setProperty("java.vendor.version", VENDOR_VERSION_STRING);
97
98 props.setProperty("java.class.version", CLASSFILE_MAJOR_MINOR);
99
100 props.setProperty("java.specification.version", VERSION_NUMBER);
101 props.setProperty("java.specification.name", "Java Platform API Specification");
102 props.setProperty("java.specification.vendor", "Oracle Corporation");
103
104 props.setProperty("java.vendor", VENDOR);
105 props.setProperty("java.vendor.url", VENDOR_URL);
106 props.setProperty("java.vendor.url.bug", VENDOR_URL_BUG);
107 }
108
109 private static int parseVersionNumber(String version, int prevIndex, int index) {
110 if (index - prevIndex > 1 &&
111 Character.digit(version.charAt(prevIndex), 10) <= 0)
112 throw new IllegalArgumentException("Leading zeros not supported (" +
113 version.substring(prevIndex, index) + ")");
114 return Integer.parseInt(version, prevIndex, index, 10);
115 }
116
117 // This method is reflectively used by regression tests.
118 static List<Integer> parseVersionNumbers(String version) {
119 // Let's find the size of an array required to hold $VNUM components
120 int size = 0;
121 int prevIndex = 0;
122 do {
123 prevIndex = version.indexOf('.', prevIndex) + 1;
124 size++;
125 } while (prevIndex > 0);
126 Integer[] verNumbers = new Integer[size];
127
128 // Fill in the array with $VNUM components
129 int n = 0;
130 prevIndex = 0;
131 int index = version.indexOf('.');
132 while (index > -1) {
133 verNumbers[n] = parseVersionNumber(version, prevIndex, index);
134 prevIndex = index + 1; // Skip the period
135 index = version.indexOf('.', prevIndex);
136 n++;
137 }
138 verNumbers[n] = parseVersionNumber(version, prevIndex, version.length());
139
140 if (verNumbers[0] == 0 || verNumbers[n] == 0)
141 throw new IllegalArgumentException("Leading/trailing zeros not allowed (" +
142 Arrays.toString(verNumbers) + ")");
143
144 return List.of(verNumbers);
145 }
146
147 static List<Integer> versionNumbers() {
148 return parseVersionNumbers(VERSION_NUMBER);
149 }
150
151 static Optional<String> pre() {
152 return optionalOf(VERSION_PRE);
153 }
154
155 static Optional<Integer> build() {
156 return VERSION_BUILD.isEmpty() ?
157 Optional.empty() :
158 Optional.of(Integer.parseInt(VERSION_BUILD));
159 }
160
161 static Optional<String> optional() {
162 return optionalOf(VERSION_OPT);
163 }
164
165 // Treat empty strings as value not being present
166 private static Optional<String> optionalOf(String value) {
167 if (!value.isEmpty()) {
168 return Optional.of(value);
169 } else {
170 return Optional.empty();
171 }
172 }
173
174 /**
175 * In case you were wondering this method is called by java -version.
176 */
177 public static void print(boolean err) {
178 print(err, false);
179 }
180
181 /**
182 * This is the same as print except that it adds an extra line-feed
183 * at the end, typically used by the -showversion in the launcher
184 */
185 public static void println(boolean err) {
186 print(err, true);
187 }
188
189 /**
190 * Print version info.
191 */
192 private static void print(boolean err, boolean newln) {
193 PrintStream ps = err ? System.err : System.out;
194
195 /* First line: platform version. */
196 if (err) {
197 ps.println(launcher_name + " version \"" + java_version + "\""
198 + " " + java_version_date
199 + (isLTS ? " LTS" : ""));
200 } else {
201 /* Use a format more in line with GNU conventions */
202 ps.println(launcher_name + " " + java_version
203 + " " + java_version_date
204 + (isLTS ? " LTS" : ""));
205 }
206
207 /* Second line: runtime version (ie, libraries). */
208 String jdk_debug_level = System.getProperty("jdk.debug", "release");
209 if ("release".equals(jdk_debug_level)) {
210 /* Do not show debug level "release" builds */
211 jdk_debug_level = "";
212 } else {
213 jdk_debug_level = jdk_debug_level + " ";
214 }
215
216 ps.println(java_runtime_name + vendor_version
217 + " (" + jdk_debug_level + "build " + java_runtime_version + ")");
218
219 /* Third line: JVM information. */
220 String java_vm_name = System.getProperty("java.vm.name");
221 String java_vm_version = System.getProperty("java.vm.version");
222 String java_vm_info = System.getProperty("java.vm.info");
223 ps.println(java_vm_name + vendor_version
224 + " (" + jdk_debug_level + "build " + java_vm_version + ", "
225 + java_vm_info + ")");
226
227 }
228
229 }