src/java/org/apache/turbine/util/FileUtils.java

package org.apache.turbine.util;

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001-2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache Turbine" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    "Apache Turbine", nor may "Apache" appear in their name, without
 *    prior written permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

/**
 * Common {@link java.io.File} manipulation routines.
 *
 * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
 * @version $Id$
 * @deprecated This class will be removed after the 2.3 release. Please
 *             use FileUtils from <a href="http://jakarta.apache.org/commons/">commons-io</a>.
 */
public class FileUtils
{
    /**
     * The number of bytes in a kilobyte.
     */
    public static final int ONE_KB = 1024;

    /**
     * The number of bytes in a megabyte.
     */
    public static final int ONE_MB = ONE_KB * ONE_KB;

    /**
     * The number of bytes in a gigabyte.
     */
    public static final int ONE_GB = ONE_KB * ONE_MB;

    /**
     * Returns a human-readable version of the file size (original is in
     * bytes).
     *
     * @param size The number of bytes.
     * @return     A human-readable display value (includes units).
     */
    public static String byteCountToDisplaySize(int size)
    {
        String displaySize;

        if (size / ONE_GB > 0)
        {
            displaySize = String.valueOf(size / ONE_GB) + " GB";
        }
        else if (size / ONE_MB > 0)
        {
            displaySize = String.valueOf(size / ONE_MB) + " MB";
        }
        else if (size / ONE_KB > 0)
        {
            displaySize = String.valueOf(size / ONE_KB) + " kB";
        }
        else
        {
            displaySize = String.valueOf(size) + " bytes";
        }

        return displaySize;
    }
}