com.sun.enterprise.util.JDK Maven / Gradle / Ivy
/*
* Copyright (c) 2009, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.enterprise.util;
/**
* A simple class that fills a hole in the JDK. It parses out the version numbers
* of the JDK we are running.
* Example:
* 1.6.0_u14 == major = 1 minor = 6, subminor = 0, update = 14
*
* @author bnevins
*/
public final class JDK {
private JDK(String string) {
String[] split = string.split("[\\._\\-]+");
if (split.length > 0) {
major = Integer.parseInt(split[0]);
}
if (split.length > 1) {
minor = Integer.parseInt(split[1]);
}
if (split.length > 2) {
subminor = Integer.parseInt(split[2]);
}
if (split.length > 3) {
update = Integer.parseInt(split[3]);
}
}
public static JDK getVersion(String string) {
if (string.matches("([0-9]+[\\._\\-]+)*[0-9]+")) {
return new JDK(string);
} else {
return null;
}
}
/**
* See if the current JDK is legal for running GlassFish
* @return true if the JDK is >= 1.6.0
*/
public static boolean ok() {
return major == 1 && minor >= 6;
}
public static int getMajor() {
return major;
}
public static int getMinor() {
return minor;
}
public static int getSubMinor() {
return subminor;
}
public static int getUpdate() {
return update;
}
public boolean newerThan(JDK version) {
if (major > version.getMajor()) {
return true;
} else if (major == version.getMajor()) {
if (minor > version.getMinor()) {
return true;
} else if (minor == version.getMinor()) {
if (subminor > version.getSubMinor()) {
return true;
} else if (subminor == version.getSubMinor()) {
if (update > version.getUpdate()) {
return true;
}
}
}
}
return false;
}
public boolean newerOrEquals(JDK version) {
return newerThan(version) || equals(version);
}
public boolean olderThan(JDK version) {
return !newerOrEquals(version);
}
public boolean olderOrEquals(JDK version) {
return !newerThan(version);
}
/**
* No instances are allowed so it is pointless to override toString
* @return Parsed version numbers
*/
public static String toStringStatic() {
return "major: " + JDK.getMajor() +
"\nminor: " + JDK.getMinor() +
"\nsubminor: " + JDK.getSubMinor() +
"\nupdate: " + JDK.getUpdate() +
"\nOK ==>" + JDK.ok();
}
static {
initialize();
}
// DO NOT initialize these variables. You'll be sorry if you do!
private static int major;
private static int minor;
private static int subminor;
private static int update;
// silently fall back to ridiculous defaults if something is crazily wrong...
private static void initialize() {
major = 1;
minor = subminor = update = 0;
try {
String jv = System.getProperty("java.version");
/*In JEP 223 java.specification.version will be a single number versioning , not a dotted versioning . So if we get a single
integer as versioning we know that the JDK is post JEP 223
For JDK 8:
java.specification.version 1.8
java.version 1.8.0_122
For JDK 9:
java.specification.version 9
java.version 9.1.2
*/
String javaSpecificationVersion = System.getProperty("java.specification.version");
String[] jsvSplit = javaSpecificationVersion.split("\\.");
if (jsvSplit.length == 1) {
//This is handle Early Access build .Example 9-ea
String[] jvSplit = jv.split("-");
String jvReal = jvSplit[0];
String[] split = jvReal.split("[\\.]+");
if (split.length > 0) {
if (split.length > 0) {
major = Integer.parseInt(split[0]);
}
if (split.length > 1) {
minor = Integer.parseInt(split[1]);
}
if (split.length > 2) {
subminor = Integer.parseInt(split[2]);
}
if (split.length > 3) {
update = Integer.parseInt(split[3]);
}
}
} else {
if (!StringUtils.ok(jv))
return; // not likely!!
String[] ss = jv.split("\\.");
if (ss.length < 3 || !ss[0].equals("1"))
return;
major = Integer.parseInt(ss[0]);
minor = Integer.parseInt(ss[1]);
ss = ss[2].split("_");
if (ss.length < 1)
return;
subminor = Integer.parseInt(ss[0]);
if (ss.length > 1)
update = Integer.parseInt(ss[1]);
}
}
catch(Exception e) {
// ignore -- use defaults
}
}
}