Back to index...

	/*
	* Copyright (c) 1997, 2012, 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 sun.awt;

	import java.security.PrivilegedAction;
	import java.util.HashMap;
	import java.util.Map;

	import static sun.awt.OSInfo.OSType.*;

	/**
	* @author Pavel Porvatov
	*/
	public class OSInfo {
	public static enum OSType {
	WINDOWS,
	LINUX,
	SOLARIS,
	MACOSX,
	UNKNOWN
	}

	/*
	The map windowsVersionMap must contain all windows version constants except WINDOWS_UNKNOWN,
	and so the method getWindowsVersion() will return the constant for known OS.
	It allows compare objects by "==" instead of "equals".
	*/
	public static final WindowsVersion WINDOWS_UNKNOWN = new WindowsVersion(-1, -1);
	public static final WindowsVersion WINDOWS_95 = new WindowsVersion(4, 0);
	public static final WindowsVersion WINDOWS_98 = new WindowsVersion(4, 10);
	public static final WindowsVersion WINDOWS_ME = new WindowsVersion(4, 90);
	public static final WindowsVersion WINDOWS_2000 = new WindowsVersion(5, 0);
	public static final WindowsVersion WINDOWS_XP = new WindowsVersion(5, 1);
	public static final WindowsVersion WINDOWS_2003 = new WindowsVersion(5, 2);
	public static final WindowsVersion WINDOWS_VISTA = new WindowsVersion(6, 0);

	private static final String OS_NAME = "os.name";
	private static final String OS_VERSION = "os.version";

	private final static Map<String, WindowsVersion> windowsVersionMap = new HashMap<String, OSInfo.WindowsVersion>();

	static {
	windowsVersionMap.put(WINDOWS_95.toString(), WINDOWS_95);
	windowsVersionMap.put(WINDOWS_98.toString(), WINDOWS_98);
	windowsVersionMap.put(WINDOWS_ME.toString(), WINDOWS_ME);
	windowsVersionMap.put(WINDOWS_2000.toString(), WINDOWS_2000);
	windowsVersionMap.put(WINDOWS_XP.toString(), WINDOWS_XP);
	windowsVersionMap.put(WINDOWS_2003.toString(), WINDOWS_2003);
	windowsVersionMap.put(WINDOWS_VISTA.toString(), WINDOWS_VISTA);
	}

	private static final PrivilegedAction<OSType> osTypeAction = new PrivilegedAction<OSType>() {
	public OSType run() {
	return getOSType();
	}
	};

	private OSInfo() {
	// Don't allow to create instances
	}

	/**
	* Returns type of operating system.
	*/
	public static OSType getOSType() throws SecurityException {
	String osName = System.getProperty(OS_NAME);

	if (osName != null) {
	if (osName.contains("Windows")) {
	return WINDOWS;
	}

	if (osName.contains("Linux")) {
	return LINUX;
	}

	if (osName.contains("Solaris") \|\| osName.contains("SunOS")) {
	return SOLARIS;
	}

	if (osName.contains("OS X")) {
	return MACOSX;
	}

	// determine another OS here
	}

	return UNKNOWN;
	}

	public static PrivilegedAction<OSType> getOSTypeAction() {
	return osTypeAction;
	}

	public static WindowsVersion getWindowsVersion() throws SecurityException {
	String osVersion = System.getProperty(OS_VERSION);

	if (osVersion == null) {
	return WINDOWS_UNKNOWN;
	}

	synchronized (windowsVersionMap) {
	WindowsVersion result = windowsVersionMap.get(osVersion);

	if (result == null) {
	// Try parse version and put object into windowsVersionMap
	String[] arr = osVersion.split("\\.");

	if (arr.length == 2) {
	try {
	result = new WindowsVersion(Integer.parseInt(arr[0]), Integer.parseInt(arr[1]));
	} catch (NumberFormatException e) {
	return WINDOWS_UNKNOWN;
	}
	} else {
	return WINDOWS_UNKNOWN;
	}

	windowsVersionMap.put(osVersion, result);
	}

	return result;
	}
	}

	public static class WindowsVersion implements Comparable<WindowsVersion> {
	private final int major;

	private final int minor;

	private WindowsVersion(int major, int minor) {
	this.major = major;
	this.minor = minor;
	}

	public int getMajor() {
	return major;
	}

	public int getMinor() {
	return minor;
	}

	public int compareTo(WindowsVersion o) {
	int result = major - o.getMajor();

	if (result == 0) {
	result = minor - o.getMinor();
	}

	return result;
	}

	public boolean equals(Object obj) {
	return obj instanceof WindowsVersion && compareTo((WindowsVersion) obj) == 0;
	}

	public int hashCode() {
	return 31 * major + minor;
	}

	public String toString() {
	return major + "." + minor;
	}
	}
	}

Back to index...