1 /*

     2  * Copyright 1997-2006 Sun Microsystems, Inc.  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.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 package sun.awt;

    27 

    28 import java.security.PrivilegedAction;

    29 import java.util.HashMap;

    30 import java.util.Map;

    31 

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

    33 

    34 /**

    35  * @author Pavel Porvatov

    36  */

    37 public class OSInfo {

    38     public static enum OSType {

    39         WINDOWS,

    40         LINUX,

    41         SOLARIS,

    42         UNKNOWN

    43     }

    44 

    45     /*

    46        The map windowsVersionMap must contain all windows version constants except WINDOWS_UNKNOWN,

    47        and so the method getWindowsVersion() will return the constant for known OS.

    48        It allows compare objects by "==" instead of "equals".

    49      */

    50     public static final WindowsVersion WINDOWS_UNKNOWN = new WindowsVersion(-1, -1);

    51     public static final WindowsVersion WINDOWS_95 = new WindowsVersion(4, 0);

    52     public static final WindowsVersion WINDOWS_98 = new WindowsVersion(4, 10);

    53     public static final WindowsVersion WINDOWS_ME = new WindowsVersion(4, 90);

    54     public static final WindowsVersion WINDOWS_2000 = new WindowsVersion(5, 0);

    55     public static final WindowsVersion WINDOWS_XP = new WindowsVersion(5, 1);

    56     public static final WindowsVersion WINDOWS_2003 = new WindowsVersion(5, 2);

    57     public static final WindowsVersion WINDOWS_VISTA = new WindowsVersion(6, 0);

    58 

    59     private static final String OS_NAME = "os.name";

    60     private static final String OS_VERSION = "os.version";

    61 

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

    63 

    64     static {

    65         windowsVersionMap.put(WINDOWS_95.toString(), WINDOWS_95);

    66         windowsVersionMap.put(WINDOWS_98.toString(), WINDOWS_98);

    67         windowsVersionMap.put(WINDOWS_ME.toString(), WINDOWS_ME);

    68         windowsVersionMap.put(WINDOWS_2000.toString(), WINDOWS_2000);

    69         windowsVersionMap.put(WINDOWS_XP.toString(), WINDOWS_XP);

    70         windowsVersionMap.put(WINDOWS_2003.toString(), WINDOWS_2003);

    71         windowsVersionMap.put(WINDOWS_VISTA.toString(), WINDOWS_VISTA);

    72     }

    73 

    74     private static final PrivilegedAction<OSType> osTypeAction = new PrivilegedAction<OSType>() {

    75         public OSType run() {

    76             return getOSType();

    77         }

    78     };

    79 

    80     private OSInfo() {

    81         // Don't allow to create instances

    82     }

    83 

    84     /**

    85      * Returns type of operating system.

    86      */

    87     public static OSType getOSType() throws SecurityException {

    88         String osName = System.getProperty(OS_NAME);

    89 

    90         if (osName != null) {

    91             if (osName.contains("Windows")) {

    92                 return WINDOWS;

    93             }

    94 

    95             if (osName.contains("Linux")) {

    96                 return LINUX;

    97             }

    98 

    99             if (osName.contains("Solaris") || osName.contains("SunOS")) {

   100                 return SOLARIS;

   101             }

   102 

   103             // determine another OS here

   104         }

   105 

   106         return UNKNOWN;

   107     }

   108 

   109     public static PrivilegedAction<OSType> getOSTypeAction() {

   110         return osTypeAction;

   111     }

   112 

   113     public static WindowsVersion getWindowsVersion() throws SecurityException {

   114         String osVersion = System.getProperty(OS_VERSION);

   115 

   116         if (osVersion == null) {

   117             return WINDOWS_UNKNOWN;

   118         }

   119 

   120         synchronized (windowsVersionMap) {

   121             WindowsVersion result = windowsVersionMap.get(osVersion);

   122 

   123             if (result == null) {

   124                 // Try parse version and put object into windowsVersionMap

   125                 String[] arr = osVersion.split("\\.");

   126 

   127                 if (arr.length == 2) {

   128                     try {

   129                         result = new WindowsVersion(Integer.parseInt(arr[0]), Integer.parseInt(arr[1]));

   130                     } catch (NumberFormatException e) {

   131                         return WINDOWS_UNKNOWN;

   132                     }

   133                 } else {

   134                     return WINDOWS_UNKNOWN;

   135                 }

   136 

   137                 windowsVersionMap.put(osVersion, result);

   138             }

   139 

   140             return result;

   141         }

   142     }

   143 

   144     public static class WindowsVersion implements Comparable<WindowsVersion> {

   145         private final int major;

   146 

   147         private final int minor;

   148 

   149         private WindowsVersion(int major, int minor) {

   150             this.major = major;

   151             this.minor = minor;

   152         }

   153 

   154         public int getMajor() {

   155             return major;

   156         }

   157 

   158         public int getMinor() {

   159             return minor;

   160         }

   161 

   162         public int compareTo(WindowsVersion o) {

   163             int result = major - o.getMajor();

   164 

   165             if (result == 0) {

   166                 result = minor - o.getMinor();

   167             }

   168 

   169             return result;

   170         }

   171 

   172         public boolean equals(Object obj) {

   173             return obj instanceof WindowsVersion && compareTo((WindowsVersion) obj) == 0;

   174         }

   175 

   176         public int hashCode() {

   177             return 31 * major + minor;

   178         }

   179 

   180         public String toString() {

   181             return major + "." + minor;

   182         }

   183     }

   184 }