/*
* 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;
}
}
}