/**
 * Copyright (c) 2005-2007, Paul Tuckey
 * All rights reserved.
 * ====================================================================
 * Licensed under the BSD License. Text as follows.
 *
 * 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 tuckey.org nor the names of its 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 OWNER 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.tuckey.web.filters.urlrewrite.sample;

import org.tuckey.web.filters.urlrewrite.extend.RewriteRule;
import org.tuckey.web.filters.urlrewrite.extend.RewriteMatch;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * A sample of how you might write a custom rule.
 */
public class SampleRewriteRule extends RewriteRule {


    public RewriteMatch matches(HttpServletRequest request, HttpServletResponse response) {

        // return null if we don't want the request
        if (!request.getRequestURI().startsWith("/staff/")) return null;

        // grab the things out of the url we need
        Integer id = Integer.valueOf(request.getRequestURI().replaceFirst("/staff/([0-9]+)/", "$1"));
        // if we don't get a good id then return null
        if (id == null) return null;

        // match required with clean parameters
        return new SampleRewriteMatch(id.intValue());
    }

}

@@ -2425,32 +2425,79 @@
 return null;%0D%0A%0D%0A
+        Integer id = null;%0D%0A        try %7B%0D%0A    
         // grab 
@@ -2535,31 +2535,27 @@
 ed%0D%0A        
-Integer
+   
  id = Intege
@@ -2601,16 +2601,34 @@
 ceFirst(
+%0D%0A                
 %22/staff/
@@ -2644,24 +2644,73 @@
 %22, %22$1%22));%0D%0A
+        %7D catch (NumberFormatException e) %7B%0D%0A    
         // i
@@ -2764,23 +2764,11 @@
     
-if (id == null)
+   
  ret
@@ -2769,32 +2769,43 @@
    return null;%0D
+%0A        %7D%0D
 %0A%0D%0A        // ma

Replace null-check of return value from Integer.valueOf with a catch of NumberFormatException in sample rule (FindBugs)