code: /*
   * 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.
   */
  
  package org.foo;
  
  import java.io.IOException;
  import java.util.Random;
  
  
  
  public class Filter  {
  
    
  
      public void doFilter(Boolean request, String response,
              String chain) throws IOException, ServletException {
  
      	String expected = "";     
          if (request) {
              
              expected = "bar";
              
                          
              
          } else {
          	expected = "foo";
          }
          
          return expected;
      }
  
    }
  