META-INF.modules.java.base.classes.java.lang.VersionProps.template Maven / Gradle / Ivy
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/*
* Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.lang;
import java.io.PrintStream;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Optional;
class VersionProps {
private static final String launcher_name =
"@@LAUNCHER_NAME@@";
private static final String java_version =
"@@VERSION_SHORT@@";
private static final String java_version_date =
"@@VERSION_DATE@@";
// This field is read by HotSpot
private static final String java_runtime_name =
"@@RUNTIME_NAME@@";
// This field is read by HotSpot
private static final String java_runtime_version =
"@@VERSION_STRING@@";
private static final String VERSION_NUMBER =
"@@VERSION_NUMBER@@";
private static final String VERSION_SPECIFICATION =
"@@VERSION_SPECIFICATION@@";
private static final String VERSION_BUILD =
"@@VERSION_BUILD@@";
private static final String VERSION_PRE =
"@@VERSION_PRE@@";
private static final String VERSION_OPT =
"@@VERSION_OPT@@";
private static final boolean isLTS =
"@@VERSION_OPT@@".startsWith("LTS");
private static final String CLASSFILE_MAJOR_MINOR =
"@@VERSION_CLASSFILE_MAJOR@@.@@VERSION_CLASSFILE_MINOR@@";
private static final String VENDOR =
"@@VENDOR@@";
private static final String VENDOR_URL =
"@@VENDOR_URL@@";
// The remaining VENDOR_* fields must not be final,
// so that they can be redefined by jlink plugins
// This field is read by HotSpot
private static String VENDOR_VERSION =
"@@VENDOR_VERSION_STRING@@";
private static String VENDOR_URL_BUG =
"@@VENDOR_URL_BUG@@";
// This field is read by HotSpot
private static String VENDOR_URL_VM_BUG =
"@@VENDOR_URL_VM_BUG@@";
/**
* Initialize system properties using build provided values.
*
* @param props Map instance in which to insert the properties
*/
public static void init(Map props) {
props.put("java.version", java_version);
props.put("java.version.date", java_version_date);
props.put("java.runtime.version", java_runtime_version);
props.put("java.runtime.name", java_runtime_name);
if (!VENDOR_VERSION.isEmpty())
props.put("java.vendor.version", VENDOR_VERSION);
props.put("java.class.version", CLASSFILE_MAJOR_MINOR);
props.put("java.specification.version", VERSION_SPECIFICATION);
props.put("java.specification.name", "Java Platform API Specification");
props.put("java.specification.vendor", "Oracle Corporation");
props.put("java.vendor", VENDOR);
props.put("java.vendor.url", VENDOR_URL);
props.put("java.vendor.url.bug", VENDOR_URL_BUG);
}
private static int parseVersionNumber(String version, int prevIndex, int index) {
if (index - prevIndex > 1 &&
Character.digit(version.charAt(prevIndex), 10) <= 0)
throw new IllegalArgumentException("Leading zeros not supported (" +
version.substring(prevIndex, index) + ")");
return Integer.parseInt(version, prevIndex, index, 10);
}
// This method is reflectively used by regression tests.
static List parseVersionNumbers(String version) {
// Let's find the size of an array required to hold $VNUM components
int size = 0;
int prevIndex = 0;
do {
prevIndex = version.indexOf('.', prevIndex) + 1;
size++;
} while (prevIndex > 0);
Integer[] verNumbers = new Integer[size];
// Fill in the array with $VNUM components
int n = 0;
prevIndex = 0;
int index = version.indexOf('.');
while (index > -1) {
verNumbers[n] = parseVersionNumber(version, prevIndex, index);
prevIndex = index + 1; // Skip the period
index = version.indexOf('.', prevIndex);
n++;
}
verNumbers[n] = parseVersionNumber(version, prevIndex, version.length());
if (verNumbers[0] == 0 || verNumbers[n] == 0)
throw new IllegalArgumentException("Leading/trailing zeros not allowed (" +
Arrays.toString(verNumbers) + ")");
return List.of(verNumbers);
}
static List versionNumbers() {
return parseVersionNumbers(VERSION_NUMBER);
}
static Optional pre() {
return optionalOf(VERSION_PRE);
}
static Optional build() {
return VERSION_BUILD.isEmpty() ?
Optional.empty() :
Optional.of(Integer.parseInt(VERSION_BUILD));
}
static Optional optional() {
return optionalOf(VERSION_OPT);
}
// Treat empty strings as value not being present
private static Optional optionalOf(String value) {
if (!value.isEmpty()) {
return Optional.of(value);
} else {
return Optional.empty();
}
}
/**
* In case you were wondering this method is called by java -version.
*/
public static void print(boolean err) {
print(err, false);
}
/**
* This is the same as print except that it adds an extra line-feed
* at the end, typically used by the -showversion in the launcher
*/
public static void println(boolean err) {
print(err, true);
}
/**
* Print version info.
*/
private static void print(boolean err, boolean newln) {
PrintStream ps = err ? System.err : System.out;
/* First line: platform version. */
if (err) {
ps.println(launcher_name + " version \"" + java_version + "\""
+ " " + java_version_date
+ (isLTS ? " LTS" : ""));
} else {
/* Use a format more in line with GNU conventions */
ps.println(launcher_name + " " + java_version
+ " " + java_version_date
+ (isLTS ? " LTS" : ""));
}
/* Second line: runtime version (ie, libraries). */
String jdk_debug_level = System.getProperty("jdk.debug", "release");
if ("release".equals(jdk_debug_level)) {
/* Do not show debug level "release" builds */
jdk_debug_level = "";
} else {
jdk_debug_level = jdk_debug_level + " ";
}
String vendor_version = (VENDOR_VERSION.isEmpty()
? "" : " " + VENDOR_VERSION);
ps.println(java_runtime_name + vendor_version
+ " (" + jdk_debug_level + "build " + java_runtime_version + ")");
/* Third line: JVM information. */
String java_vm_name = System.getProperty("java.vm.name");
String java_vm_version = System.getProperty("java.vm.version");
String java_vm_info = System.getProperty("java.vm.info");
ps.println(java_vm_name + vendor_version
+ " (" + jdk_debug_level + "build " + java_vm_version + ", "
+ java_vm_info + ")");
}
}
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