Normalizes an URL
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* Created on 11/07/2005 00:32:01
* The JForum Project
* http://www.jforum.net
*/
/**
* Normalizes an URL.
* Normalization means replacing blank spaces by underlines,
* changing special chars by its regular form and etc.
* @author Rafael Steil
* @version $Id: URLNormalizer.java,v 1.4 2006/08/20 22:47:42 rafaelsteil Exp $
*/
public class URLNormalizer
{
public static final int LIMIT = 30;
/**
* Normalizes an URL.
* The url will be truncated at {@link #LIMIT} chars
* @param url the url to normalize
* @return the normalized url
* @see #normalize(String, int, boolean)
*/
public static String normalize(String url)
{
return normalize(url, LIMIT, true);
}
/**
*
* @param url the url to normalize
* @param limit do not process more than <code>limit + 1</code> chars
* @param friendlyTruncate If <code>true</code>, will try to not cut a word if
* more than <code>limit</code> chars were processed. It will stop in the next
* special char
* @return the normalized url
*/
public static String normalize(String url, int limit, boolean friendlyTruncate)
{
char[] chars = url.toCharArray();
StringBuffer sb = new StringBuffer(url.length());
for (int i = 0; i < chars.length; i++) {
if (i <= limit || (friendlyTruncate && i > limit && sb.charAt(sb.length() - 1) != '_')) {
if (Character.isSpaceChar(chars[i]) || chars[i] == '-') {
if (friendlyTruncate && i > limit) {
break;
}
if (i > 0 && sb.charAt(sb.length() - 1) != '_') {
sb.append('_');
}
}
if (Character.isLetterOrDigit(chars[i])) {
sb.append(chars[i]);
}
else if (friendlyTruncate && i > limit) {
break;
}
}
}
return sb.toString().toLowerCase();
}
}
///////////////
/*
* Created on 11/07/2005 00:25:19
*/
package net.jforum.util;
import junit.framework.TestCase;
/**
* Remove special chars, spaces and etc from a string
* @author Rafael Steil
* @version $Id: URLNormalizerTest.java,v 1.4 2005/07/26 04:01:12 diegopires Exp $
*/
public class URLNormalizerTest extends TestCase
{
public void testReplaceSpaceByUnderline()
{
String s = "this is a test";
String normalized = URLNormalizer.normalize(s);
assertEquals("this_is_a_test", normalized);
}
public void testFriendlyLimit()
{
String s = "this is long string used for testing the limit";
String normalized = URLNormalizer.normalize(s);
assertEquals("this_is_long_string_used_for_testing", normalized);
}
public void testUnfriendlyLimit()
{
String s = "this is long string used for testing the limit";
String normalized = URLNormalizer.normalize(s, URLNormalizer.LIMIT, false);
assertEquals("this_is_long_string_used_for_te", normalized);
}
public void testFriendlyLimitWithParentesis()
{
String s = "this is long string used for testing(the limit)";
String normalized = URLNormalizer.normalize(s);
assertEquals("this_is_long_string_used_for_testing", normalized);
}
public void testRemovePlusParentesis()
{
String s = "a test + some + 2 thing(s)";
String normalized = URLNormalizer.normalize(s);
assertEquals("a_test_some_2_things", normalized);
}
public void testRemovePorcentageDollarStarEtc()
{
String s = "!@#$%^&*";
String normalized = URLNormalizer.normalize(s);
assertEquals("", normalized);
}
}
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