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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.orchestra.lib;
21  
22  import java.io.IOException;
23  
24  import javax.servlet.Filter;
25  import javax.servlet.FilterChain;
26  import javax.servlet.FilterConfig;
27  import javax.servlet.ServletException;
28  import javax.servlet.ServletRequest;
29  import javax.servlet.ServletResponse;
30  
31  /***
32   * Compose two filter objects together, as if filter2 is nested within filter1.
33   */
34  public abstract class CompoundFilter implements Filter
35  {
36  	private final Filter filter1;
37  	private final Filter filter2;
38  
39  	public CompoundFilter(Filter filter1, Filter filter2)
40  	{
41  		this.filter1 = filter1;
42  		this.filter2 = filter2;
43  	}
44  
45  	public void init(FilterConfig filterConfig) throws ServletException
46  	{
47  		filter1.init(filterConfig);
48  		filter2.init(filterConfig);
49  	}
50  
51  	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, final FilterChain filterChain) throws IOException, ServletException
52  	{
53  		FilterChain chain = new FilterChain()
54  		{
55  			public void doFilter(ServletRequest req, ServletResponse rsp) throws IOException, ServletException
56  			{
57  				filter2.doFilter(req, rsp, filterChain);
58  			}
59  			
60  		};
61  		
62  		filter1.doFilter(servletRequest, servletResponse, chain);
63  	}
64  
65  	public void destroy()
66  	{
67  		filter2.destroy();
68  		filter1.destroy();
69  	}
70  }