Filter that wraps an HttpServletRequest to override "isUserInRole". : Filter « Servlets « Java

Filter that wraps an HttpServletRequest to override "isUserInRole".

 * $Id: 637430 2008-03-15 15:38:35Z apetrelli $
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

 * Filter that wraps an HttpServletRequest to override "isUserInRole".
 * @version $Rev: 637430 $ $Date: 2008-03-15 16:38:35 +0100 (Sat, 15 Mar 2008) $
public class SecurityWrappingFilter implements Filter {

     * The role that the current user is supposed to use.
    public static final String GOOD_ROLE = "goodrole";

    /** {@inheritDoc} */
    public void init(FilterConfig filterConfig) throws ServletException {
        // No operation

    /** {@inheritDoc} */
    public void doFilter(ServletRequest servletRequest,
            ServletResponse servletResponse, FilterChain filterChain)
            throws IOException, ServletException {
        HttpServletRequest wrappedRequest = new SecurityWrapperHttpServletRequest(
                (HttpServletRequest) servletRequest);
        filterChain.doFilter(wrappedRequest, servletResponse);

    /** {@inheritDoc} */
    public void destroy() {
        // No operation

     * Request wrapper that overrides "isUserInRole" method.
     * @version $Rev: 637430 $ $Date: 2008-03-15 16:38:35 +0100 (Sat, 15 Mar 2008) $
    private static class SecurityWrapperHttpServletRequest extends
            HttpServletRequestWrapper {
         * Constructor.
         * @param request The HTTP servlet request.
        public SecurityWrapperHttpServletRequest(HttpServletRequest request) {

        /** {@inheritDoc} */
        public boolean isUserInRole(String role) {
            return GOOD_ROLE.equals(role);


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