1 /*
2 * Copyright (c) 1999, 2016, 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.ArrayList;
30 import java.util.List;
31 import java.util.Optional;
32
33 class VersionProps {
34
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_runtime_name =
43 "@@RUNTIME_NAME@@";
44
45 private static final String java_runtime_version =
46 "@@VERSION_STRING@@";
47
48 private static final String VERSION_NUMBER =
49 "@@VERSION_NUMBER@@";
50
51 private static final String VERSION_BUILD =
52 "@@VERSION_BUILD@@";
53
54 private static final String VERSION_PRE =
55 "@@VERSION_PRE@@";
56
57 private static final String VERSION_OPT =
58 "@@VERSION_OPT@@";
59
60 static {
61 init();
62 }
63
64 public static void init() {
65 System.setProperty("java.version", java_version);
66 System.setProperty("java.runtime.version", java_runtime_version);
67 System.setProperty("java.runtime.name", java_runtime_name);
68 }
69
70 private static void check(String s, int prevIndex, int index) {
71 if (index - prevIndex > 1 &&
72 Character.digit(s.charAt(prevIndex), 10) <= 0)
73 throw new IllegalArgumentException("Leading zeros not supported (" +
74 s.substring(prevIndex, index) + ")");
75 }
76
77 // This method is reflectively regression tested from
78 // test/java/lang/Runtime/Version/VersionProps.java
79 // If you rename or remove this method, please update the test accordingly.
80 static List<Integer> parseVersionNumbers(String versionNumber) {
81 List<Integer> versionNumbers = new ArrayList<>(4);
82 int prevIndex = 0;
83 int index = versionNumber.indexOf('.');
84 while (index > 0) {
85 check(versionNumber, prevIndex, index);
86 versionNumbers.add(
87 Integer.parseInt(versionNumber, prevIndex, index, 10));
88 prevIndex = index + 1; // Skip the period
89 index = versionNumber.indexOf('.', prevIndex);
90 }
91 check(versionNumber, prevIndex, versionNumber.length());
92 versionNumbers.add(Integer.parseInt(versionNumber,
93 prevIndex, versionNumber.length(), 10));
94
95 if (versionNumbers.get(0) == 0 || versionNumbers.get(versionNumbers.size() - 1) == 0)
96 throw new IllegalArgumentException("Leading or trailing zeros not supported (" +
97 versionNumbers + ")");
98
99 return versionNumbers;
100 }
101
102 static List<Integer> versionNumbers() {
103 return parseVersionNumbers(VERSION_NUMBER);
104 }
105
106 static Optional<String> pre() {
107 return optionalOf(VERSION_PRE);
108 }
109
110 static Optional<Integer> build() {
111 return VERSION_BUILD.isEmpty() ?
112 Optional.empty() :
113 Optional.of(Integer.parseInt(VERSION_BUILD));
114 }
115
116 static Optional<String> optional() {
117 return optionalOf(VERSION_OPT);
118 }
119
120 // Treat empty strings as value not being present
121 private static Optional<String> optionalOf(String value) {
122 if (!value.isEmpty()) {
123 return Optional.of(value);
124 } else {
125 return Optional.empty();
126 }
127 }
128
129 /**
130 * In case you were wondering this method is called by java -version.
131 * Sad that it prints to stderr; would be nicer if default printed on
132 * stdout.
133 */
134 public static void print() {
135 print(System.err);
136 }
137
138 /**
139 * This is the same as print except that it adds an extra line-feed
140 * at the end, typically used by the -showversion in the launcher
141 */
142 public static void println() {
143 print(System.err);
144 System.err.println();
145 }
146
147 /**
148 * Give a stream, it will print version info on it.
149 */
150 public static void print(PrintStream ps) {
151 boolean isHeadless = false;
152
153 /* Report that we're running headless if the property is true */
154 String headless = System.getProperty("java.awt.headless");
155 if ( (headless != null) && (headless.equalsIgnoreCase("true")) ) {
156 isHeadless = true;
157 }
158
159 /* First line: platform version. */
160 ps.println(launcher_name + " version \"" + java_version + "\"");
161
162 /* Second line: runtime version (ie, libraries). */
163
164 String jdk_debug_level = System.getProperty("jdk.debug", "release");
165 /* Debug level is not printed for "release" builds */
166 if ("release".equals(jdk_debug_level)) {
167 jdk_debug_level = "";
168 } else {
169 jdk_debug_level = jdk_debug_level + " ";
170 }
171
172 ps.print(java_runtime_name + " (" + jdk_debug_level + "build " + java_runtime_version);
173
174 if (java_runtime_name.indexOf("Embedded") != -1 && isHeadless) {
175 // embedded builds report headless state
176 ps.print(", headless");
177 }
178 ps.println(')');
179
180 /* Third line: JVM information. */
181 String java_vm_name = System.getProperty("java.vm.name");
182 String java_vm_version = System.getProperty("java.vm.version");
183 String java_vm_info = System.getProperty("java.vm.info");
184 ps.println(java_vm_name + " (" + jdk_debug_level + "build " + java_vm_version + ", " +
185 java_vm_info + ")");
186 }
187
188 }