/*

  * Copyright 2007 Ivan Dubrov

  * Copyright 2007 Robin Helgelin

  *

  * Licensed 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.

  */

 package nu.localhost.tapestry.acegi.services.internal;

 import java.io.IOException;

 import javax.servlet.Filter;

 import javax.servlet.FilterChain;

 import javax.servlet.ServletException;

 import javax.servlet.ServletRequest;

 import javax.servlet.ServletResponse;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.apache.tapestry.services.HttpServletRequestFilter;

 import org.apache.tapestry.services.HttpServletRequestHandler;

 /**

  * @author Ivan Dubrov

  */

 public class HttpServletRequestFilterWrapper

 implements HttpServletRequestFilter {

     private Filter filter;

     public HttpServletRequestFilterWrapper(final Filter filter) {

         this.filter = filter;

     }

     public final boolean service(final HttpServletRequest request,

             final HttpServletResponse response,

             final HttpServletRequestHandler handler) throws IOException {

         // TODO: Thread safety!

         // Assume request handled if filter chain is NOT executed

         final boolean[] res = new boolean[] {true};

         try {

             filter.doFilter(request, response, new FilterChain() {

                 public void doFilter(final ServletRequest request,

                         final ServletResponse response)

                         throws IOException, ServletException {

                     res[0] = handler.service((HttpServletRequest) request,

                             (HttpServletResponse) response);

                 }

             });

         } catch (ServletException e) {

             IOException ex = new IOException(e.getMessage());

             ex.initCause(e);

             throw ex;

         }

         return res[0];

     }

 }