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/*
* Util.java
*
* Version: $Revision: $
*
* Date: $Date: $
*
* Copyright (c) 2002-2005, Hewlett-Packard Company and Massachusetts
* Institute of Technology. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of the Hewlett-Packard Company nor the name of the
* Massachusetts Institute of Technology nor the names of their
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS 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 COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* 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.
*/
package org.dspace.app.util;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Enumeration;
import java.util.Locale;
import javax.servlet.http.HttpServletRequest;
import org.apache.log4j.Logger;
import org.dspace.core.Constants;
/**
* Miscellaneous utility methods
*
* @author Robert Tansley
* @author Mark Diggory
* @version $Revision: $
*/
public class Util {
private static Logger log = Logger.getLogger(Util.class);
/**
* Utility method to convert spaces in a string to HTML non-break space
* elements.
*
* @param s
* string to change spaces in
* @return the string passed in with spaces converted to HTML non-break
* spaces
*/
public static String nonBreakSpace(String s) {
StringBuffer newString = new StringBuffer();
for (int i = 0; i < s.length(); i++)
{
char ch = s.charAt(i);
if (ch == ' ')
{
newString.append(" ");
}
else
{
newString.append(ch);
}
}
return newString.toString();
}
/**
* Encode a bitstream name for inclusion in a URL in an HTML document. This
* differs from the usual URL-encoding, since we want pathname separators to
* be passed through verbatim; this is required so that relative paths in
* bitstream names and HTML references work correctly.
* <P>
* If the link to a bitstream is generated with the pathname separators
* escaped (e.g. "%2F" instead of "/") then the Web user agent perceives it
* to be one pathname element, and relative URI paths within that document
* containing ".." elements will be handled incorrectly.
* <P>
*
* @param stringIn
* input string to encode
* @param encoding
* character encoding, e.g. UTF-8
* @return the encoded string
*/
public static String encodeBitstreamName(String stringIn, String encoding) throws java.io.UnsupportedEncodingException {
// FIXME: This should be moved elsewhere, as it is used outside the UI
StringBuffer out = new StringBuffer();
final String[] pctEncoding = { "%00", "%01", "%02", "%03", "%04",
"%05", "%06", "%07", "%08", "%09", "%0a", "%0b", "%0c", "%0d",
"%0e", "%0f", "%10", "%11", "%12", "%13", "%14", "%15", "%16",
"%17", "%18", "%19", "%1a", "%1b", "%1c", "%1d", "%1e", "%1f",
"%20", "%21", "%22", "%23", "%24", "%25", "%26", "%27", "%28",
"%29", "%2a", "%2b", "%2c", "%2d", "%2e", "%2f", "%30", "%31",
"%32", "%33", "%34", "%35", "%36", "%37", "%38", "%39", "%3a",
"%3b", "%3c", "%3d", "%3e", "%3f", "%40", "%41", "%42", "%43",
"%44", "%45", "%46", "%47", "%48", "%49", "%4a", "%4b", "%4c",
"%4d", "%4e", "%4f", "%50", "%51", "%52", "%53", "%54", "%55",
"%56", "%57", "%58", "%59", "%5a", "%5b", "%5c", "%5d", "%5e",
"%5f", "%60", "%61", "%62", "%63", "%64", "%65", "%66", "%67",
"%68", "%69", "%6a", "%6b", "%6c", "%6d", "%6e", "%6f", "%70",
"%71", "%72", "%73", "%74", "%75", "%76", "%77", "%78", "%79",
"%7a", "%7b", "%7c", "%7d", "%7e", "%7f", "%80", "%81", "%82",
"%83", "%84", "%85", "%86", "%87", "%88", "%89", "%8a", "%8b",
"%8c", "%8d", "%8e", "%8f", "%90", "%91", "%92", "%93", "%94",
"%95", "%96", "%97", "%98", "%99", "%9a", "%9b", "%9c", "%9d",
"%9e", "%9f", "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6",
"%a7", "%a8", "%a9", "%aa", "%ab", "%ac", "%ad", "%ae", "%af",
"%b0", "%b1", "%b2", "%b3", "%b4", "%b5", "%b6", "%b7", "%b8",
"%b9", "%ba", "%bb", "%bc", "%bd", "%be", "%bf", "%c0", "%c1",
"%c2", "%c3", "%c4", "%c5", "%c6", "%c7", "%c8", "%c9", "%ca",
"%cb", "%cc", "%cd", "%ce", "%cf", "%d0", "%d1", "%d2", "%d3",
"%d4", "%d5", "%d6", "%d7", "%d8", "%d9", "%da", "%db", "%dc",
"%dd", "%de", "%df", "%e0", "%e1", "%e2", "%e3", "%e4", "%e5",
"%e6", "%e7", "%e8", "%e9", "%ea", "%eb", "%ec", "%ed", "%ee",
"%ef", "%f0", "%f1", "%f2", "%f3", "%f4", "%f5", "%f6", "%f7",
"%f8", "%f9", "%fa", "%fb", "%fc", "%fd", "%fe", "%ff" };
byte[] bytes = stringIn.getBytes(encoding);
for (int i = 0; i < bytes.length; i++)
{
// Any unreserved char or "/" goes through unencoded
if ((bytes[i] >= 'A' && bytes[i] <= 'Z')
|| (bytes[i] >= 'a' && bytes[i] <= 'z')
|| (bytes[i] >= '0' && bytes[i] <= '9') || bytes[i] == '-'
|| bytes[i] == '.' || bytes[i] == '_' || bytes[i] == '~'
|| bytes[i] == '/')
{
out.append((char) bytes[i]);
}
else if (bytes[i] >= 0)
{
// encode other chars (byte code < 128)
out.append(pctEncoding[bytes[i]]);
}
else
{
// encode other chars (byte code > 127, so it appears as
// negative in Java signed byte data type)
out.append(pctEncoding[256 + bytes[i]]);
}
}
log.debug("encoded \"" + stringIn + "\" to \"" + out.toString() + "\"");
return out.toString();
}
/** Version of encodeBitstreamName with one parameter, uses default encoding
* <P>
* @param stringIn
* input string to encode
* @return the encoded string
*/
public static String encodeBitstreamName(String stringIn) throws java.io.UnsupportedEncodingException {
return encodeBitstreamName(stringIn, Constants.DEFAULT_ENCODING);
}
/**
* Formats the file size. Examples:
*
* - 50 = 50B
* - 1024 = 1KB
* - 1,024,000 = 1MB etc
*
* The numbers are formatted using java Locales
*
* @param in The number to covnert
* @return the file size as a String
*/
public static String formatFileSize(double in) {
// Work out the size of the file, and format appropriatly
// FIXME: When full i18n support is available, use the user's Locale
// rather than the default Locale.
NumberFormat nf = NumberFormat.getNumberInstance(Locale.getDefault());
DecimalFormat df = (DecimalFormat)nf;
df.applyPattern("###,###.##");
if (in < 1024)
{
df.applyPattern("0");
return df.format(in) + " " + "B";
}
else if (in < 1024000)
{
in = in / 1024;
return df.format(in) + " " + "kB";
}
else if (in < 1024000000)
{
in = in / 1024000;
return df.format(in) + " " + "MB";
}
else
{
in = in / 1024000000;
return df.format(in) + " " + "GB";
}
}
/**
* Obtain a parameter from the given request as an int. <code>-1</code> is
* returned if the parameter is garbled or does not exist.
*
* @param request
* the HTTP request
* @param param
* the name of the parameter
*
* @return the integer value of the parameter, or -1
*/
public static int getIntParameter(HttpServletRequest request, String param)
{
String val = request.getParameter(param);
try
{
return Integer.parseInt(val.trim());
}
catch (Exception e)
{
// Problem with parameter
return -1;
}
}
/**
* Obtain an array of int parameters from the given request as an int. null
* is returned if parameter doesn't exist. <code>-1</code> is returned in
* array locations if that particular value is garbled.
*
* @param request
* the HTTP request
* @param param
* the name of the parameter
*
* @return array of integers or null
*/
public static int[] getIntParameters(HttpServletRequest request,
String param)
{
String[] request_values = request.getParameterValues(param);
if (request_values == null)
{
return null;
}
int[] return_values = new int[request_values.length];
for (int x = 0; x < return_values.length; x++)
{
try
{
return_values[x] = Integer.parseInt(request_values[x]);
}
catch (Exception e)
{
// Problem with parameter, stuff -1 in this slot
return_values[x] = -1;
}
}
return return_values;
}
/**
* Obtain a parameter from the given request as a boolean.
* <code>false</code> is returned if the parameter is garbled or does not
* exist.
*
* @param request
* the HTTP request
* @param param
* the name of the parameter
*
* @return the integer value of the parameter, or -1
*/
public static boolean getBoolParameter(HttpServletRequest request,
String param)
{
return ((request.getParameter(param) != null) && request.getParameter(
param).equals("true"));
}
/**
* Get the button the user pressed on a submitted form. All buttons should
* start with the text <code>submit</code> for this to work. A default
* should be supplied, since often the browser will submit a form with no
* submit button pressed if the user presses enter.
*
* @param request
* the HTTP request
* @param def
* the default button
*
* @return the button pressed
*/
public static String getSubmitButton(HttpServletRequest request, String def)
{
Enumeration e = request.getParameterNames();
while (e.hasMoreElements())
{
String parameterName = (String) e.nextElement();
if (parameterName.startsWith("submit"))
{
return parameterName;
}
}
return def;
}
}
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