SecurityWrappingFilter.java Source code

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Here is the source code for SecurityWrappingFilter.java

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/*
 * $Id: SecurityWrappingFilter.java 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
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.io.IOException;
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) {
            super(request);
        }

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