1 /*
2 * Copyright (c) 1999, 2017, 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 VENDOR_VERSION_STRING =
67 "@@VENDOR_VERSION_STRING@@";
68
69 private static final String vendor_version =
70 (VENDOR_VERSION_STRING.length() > 0
71 ? " " + VENDOR_VERSION_STRING : "");
72
73 public static void init(Properties props) {
74 props.setProperty("java.version", java_version);
75 props.setProperty("java.version.date", java_version_date);
76 props.setProperty("java.runtime.version", java_runtime_version);
77 props.setProperty("java.runtime.name", java_runtime_name);
78 if (VENDOR_VERSION_STRING.length() > 0)
79 props.setProperty("java.vendor.version", VENDOR_VERSION_STRING);
80 }
81
82 private static int parseVersionNumber(String version, int prevIndex, int index) {
83 if (index - prevIndex > 1 &&
84 Character.digit(version.charAt(prevIndex), 10) <= 0)
85 throw new IllegalArgumentException("Leading zeros not supported (" +
86 version.substring(prevIndex, index) + ")");
87 return Integer.parseInt(version, prevIndex, index, 10);
88 }
89
90 // This method is reflectively used by regression tests.
91 static List<Integer> parseVersionNumbers(String version) {
92 // Let's find the size of an array required to hold $VNUM components
93 int size = 0;
94 int prevIndex = 0;
95 do {
96 prevIndex = version.indexOf('.', prevIndex) + 1;
97 size++;
98 } while (prevIndex > 0);
99 Integer[] verNumbers = new Integer[size];
100
101 // Fill in the array with $VNUM components
102 int n = 0;
103 prevIndex = 0;
104 int index = version.indexOf('.');
105 while (index > -1) {
106 verNumbers[n] = parseVersionNumber(version, prevIndex, index);
107 prevIndex = index + 1; // Skip the period
108 index = version.indexOf('.', prevIndex);
109 n++;
110 }
111 verNumbers[n] = parseVersionNumber(version, prevIndex, version.length());
112
113 if (verNumbers[0] == 0 || verNumbers[n] == 0)
114 throw new IllegalArgumentException("Leading/trailing zeros not allowed (" +
115 Arrays.toString(verNumbers) + ")");
116
117 return List.of(verNumbers);
118 }
119
120 static List<Integer> versionNumbers() {
121 return parseVersionNumbers(VERSION_NUMBER);
122 }
123
124 static Optional<String> pre() {
125 return optionalOf(VERSION_PRE);
126 }
127
128 static Optional<Integer> build() {
129 return VERSION_BUILD.isEmpty() ?
130 Optional.empty() :
131 Optional.of(Integer.parseInt(VERSION_BUILD));
132 }
133
134 static Optional<String> optional() {
135 return optionalOf(VERSION_OPT);
136 }
137
138 // Treat empty strings as value not being present
139 private static Optional<String> optionalOf(String value) {
140 if (!value.isEmpty()) {
141 return Optional.of(value);
142 } else {
143 return Optional.empty();
144 }
145 }
146
147 /**
148 * In case you were wondering this method is called by java -version.
149 */
150 public static void print(boolean err) {
151 print(err, false);
152 }
153
154 /**
155 * This is the same as print except that it adds an extra line-feed
156 * at the end, typically used by the -showversion in the launcher
157 */
158 public static void println(boolean err) {
159 print(err, true);
160 }
161
162 /**
163 * Print version info.
164 */
165 private static void print(boolean err, boolean newln) {
166 PrintStream ps = err ? System.err : System.out;
167
168 /* First line: platform version. */
169 if (err) {
170 ps.println(launcher_name + " version \"" + java_version + "\""
171 + " " + java_version_date
172 + (isLTS ? " LTS" : ""));
173 } else {
174 /* Use a format more in line with GNU conventions */
175 ps.println(launcher_name + " " + java_version
176 + " " + java_version_date
177 + (isLTS ? " LTS" : ""));
178 }
179
180 /* Second line: runtime version (ie, libraries). */
181 String jdk_debug_level = System.getProperty("jdk.debug", "release");
182 if ("release".equals(jdk_debug_level)) {
183 /* Do not show debug level "release" builds */
184 jdk_debug_level = "";
185 } else {
186 jdk_debug_level = jdk_debug_level + " ";
187 }
188
189 ps.println(java_runtime_name + vendor_version
190 + " (" + jdk_debug_level + "build " + java_runtime_version + ")");
191
192 /* Third line: JVM information. */
193 String java_vm_name = System.getProperty("java.vm.name");
194 String java_vm_version = System.getProperty("java.vm.version");
195 String java_vm_info = System.getProperty("java.vm.info");
196 ps.println(java_vm_name + vendor_version
197 + " (" + jdk_debug_level + "build " + java_vm_version + ", "
198 + java_vm_info + ")");
199
200 }
201
202 }