/*******************************************************************************
* Copyright (c) 2007, 2009 SAP AG and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* SAP AG - initial API and implementation
*******************************************************************************/
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 Kaloyan Raev
*/
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("/")) { //$NON-NLS-1$
if (urlPattern.indexOf("*.") == -1) { //$NON-NLS-1$
return true;
}
return false;
}
// Extension Mappings must not contain '/' characters
if (urlPattern.startsWith("*.")) { //$NON-NLS-1$
if (urlPattern.indexOf('/') == -1) {
return true;
}
return false;
}
// The URL Pattern is neither a Path Mapping, nor Extension Mapping
// Therefore, it is invalid
return false;
}
}