| package org.eclipse.jst.j2ee.web.validation; |
| |
| /** |
| * Utility method for URL patterns. |
| * |
| * <p> |
| * Could be used by components dealing with URL patterns like: Servlet and |
| * Filter wizards, web.xml validators, etc. |
| * </p> |
| * |
| * @author kraev |
| */ |
| public class UrlPattern { |
| |
| /** |
| * Validates an URL pattern. |
| * |
| * @param urlPattern |
| * the string representation of the URL pattern to validate |
| * |
| * @return <code>true</code> if the given pattern is a valid one, |
| * <code>false</code> - otherwise. |
| */ |
| public static boolean isValid(String urlPattern) { |
| // URL Pattern must not be empty string |
| if (urlPattern.length() == 0) |
| return false; |
| |
| // URL Pattern must not contain Carriage Return characters |
| if (urlPattern.indexOf('\r') != -1) |
| return false; |
| |
| // URL Pattern must not contain New Line characters |
| if (urlPattern.indexOf('\n') != -1) |
| return false; |
| |
| // Path Mappings must not contain "*." character sequences |
| if (urlPattern.startsWith("/")) { |
| if (urlPattern.indexOf("*.") == -1) { |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| // Extension Mappings must not contain '/' characters |
| if (urlPattern.startsWith("*.")) { |
| if (urlPattern.indexOf('/') == -1) { |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| // The URL Pattern is neither a Path Mapping, nor Extension Mapping |
| // Therefore, it is invalid |
| return false; |
| } |
| |
| } |
