1 package org.apache.turbine.util;
2
3 /* ====================================================================
4 * The Apache Software License, Version 1.1
5 *
6 * Copyright (c) 2001 The Apache Software Foundation. All rights
7 * reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. The end-user documentation included with the redistribution,
22 * if any, must include the following acknowledgment:
23 * "This product includes software developed by the
24 * Apache Software Foundation (http://www.apache.org/)."
25 * Alternately, this acknowledgment may appear in the software itself,
26 * if and wherever such third-party acknowledgments normally appear.
27 *
28 * 4. The names "Apache" and "Apache Software Foundation" and
29 * "Apache Turbine" must not be used to endorse or promote products
30 * derived from this software without prior written permission. For
31 * written permission, please contact apache@apache.org.
32 *
33 * 5. Products derived from this software may not be called "Apache",
34 * "Apache Turbine", nor may "Apache" appear in their name, without
35 * prior written permission of the Apache Software Foundation.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This software consists of voluntary contributions made by many
52 * individuals on behalf of the Apache Software Foundation. For more
53 * information on the Apache Software Foundation, please see
54 * <http://www.apache.org/>.
55 */
56
57 /***
58 * Common {@link java.io.File} manipulation routines.
59 *
60 * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
61 * @version $Id: FileUtils.java,v 1.1.1.1 2001/08/16 05:09:39 jvanzyl Exp $
62 */
63 public class FileUtils
64 {
65 /***
66 * The number of bytes in a kilobyte.
67 */
68 public static final int ONE_KB = 1024;
69
70 /***
71 * The number of bytes in a megabyte.
72 */
73 public static final int ONE_MB = ONE_KB * ONE_KB;
74
75 /***
76 * The number of bytes in a gigabyte.
77 */
78 public static final int ONE_GB = ONE_KB * ONE_MB;
79
80 /***
81 * Returns a human-readable version of the file size (original is in
82 * bytes).
83 *
84 * @param size The number of bytes.
85 * @return A human-readable display value (includes units).
86 */
87 public static String byteCountToDisplaySize(int size)
88 {
89 String displaySize;
90
91 if (size / ONE_GB > 0)
92 {
93 displaySize = String.valueOf(size / ONE_GB) + " GB";
94 }
95 else if (size / ONE_MB > 0)
96 {
97 displaySize = String.valueOf(size / ONE_MB) + " MB";
98 }
99 else if (size / ONE_KB > 0)
100 {
101 displaySize = String.valueOf(size / ONE_KB) + " kB";
102 }
103 else
104 {
105 displaySize = String.valueOf(size) + " bytes";
106 }
107
108 return displaySize;
109 }
110 }
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