1 /*
2 Copyright (C) 2000 - 2007 Grid Systems, S.A.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License, version 2, as
6 published by the Free Software Foundation.
7
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
12
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 */
17
18 package com.gridsystems.systemutils;
19
20 import java.io.File;
21
22 /**
23 * Provides information of the disk units.
24 *
25 * @author XMAS
26 * @author SJM
27 */
28 public final class SystemUtils {
29
30 /**
31 * Constructor.
32 */
33 private SystemUtils() {
34 }
35
36 /**
37 * Gets the free disk space in the partition/unit to which the specified path belongs.
38 *
39 * @param path path to a file in the partition/unit whose space is requested.
40 * <br>WARNING: The path must point to an existing file. In Windows
41 * systems, it must point to a folder/directory, not to a regular file. To
42 * avoid cross-platform issues, it is advised to always use a path to a
43 * directory
44 *
45 * @return the free space in bytes, rounded down. 0 in case of error.
46 */
47 public static long getFreeDiskSpace(String path) {
48 return (JNISystemUtils.getFreeDiskSpace(path) * 1024 * 1024);
49 }
50
51 /**
52 * Gets the total disk space in the partition/unit to which the specified path belongs.
53 *
54 * @param path path to a file in the partition/unit whose space is requested.
55 * <br>WARNING: The path must point to an existing file. In Windows
56 * systems, it must point to a folder/directory, not to a regular file. To
57 * avoid cross-platform issues, it is advised to always use a path to a
58 * directory
59 *
60 * @return the total disk space in bytes, rounded down. 0 in case of error.
61 */
62 public static long getTotalDiskSpace(String path) {
63 return (JNISystemUtils.getTotalDiskSpace(path) * 1024 * 1024);
64 }
65
66 /**
67 * Obtain Mac Address of local machine.
68 *
69 * @return MacAddress of local machine.
70 * If String starts with 'Error:',
71 * then the description of error is included in this string.
72 * @throws Exception if error
73 */
74 public static String getLocalMacAddress() throws Exception {
75 return JNISystemUtils.getLocalMacAddress();
76 }
77
78 /**
79 * Test program.
80 *
81 * Shows the total and free disk spaces in the working directory.
82 *
83 * @param args Unused.
84 */
85 public static void main(String[] args) {
86 try {
87 String str = new File(".").getAbsolutePath();
88 System.out.println("Free Disk: " + SystemUtils.getFreeDiskSpace(str) + " bytes");
89 System.out.println("Total Disk: " + SystemUtils.getTotalDiskSpace(str) + " bytes");
90 System.out.println("Mac Address: " + SystemUtils.getLocalMacAddress());
91 System.exit(0);
92 } catch (Exception ex) {
93 ex.printStackTrace();
94 }
95 }
96
97 }