1 /**
2 * This file Copyright (c) 2003-2010 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.cms.filters;
35
36 import info.magnolia.context.Context;
37 import info.magnolia.context.MgnlContext;
38 import info.magnolia.context.WebContext;
39
40 import java.io.IOException;
41
42 import javax.servlet.FilterChain;
43 import javax.servlet.ServletException;
44 import javax.servlet.ServletRequest;
45 import javax.servlet.ServletResponse;
46 import javax.servlet.http.HttpServletRequest;
47 import javax.servlet.http.HttpServletResponse;
48
49 /**
50 * Handles the bypassing
51 * @author philipp
52 * @version $Id: MgnlFilterChain.java 32667 2010-03-13 00:37:06Z gjoseph $
53 *
54 */
55 public class MgnlFilterChain implements FilterChain {
56
57 private MgnlFilter[] filters;
58
59 private int position;
60
61 private FilterChain originalChain;
62
63 public MgnlFilterChain(FilterChain originalChain, MgnlFilter[] filters) {
64 this.filters = filters;
65 this.originalChain = originalChain;
66 }
67
68 public void doFilter(ServletRequest request, ServletResponse response) throws IOException, ServletException {
69 Context ctx = MgnlContext.hasInstance() ? MgnlContext.getInstance() : null;
70 boolean updateCtx = ctx instanceof WebContext && request instanceof HttpServletRequest && response instanceof HttpServletResponse;
71 if (updateCtx) {
72 ((WebContext) ctx).push((HttpServletRequest) request, (HttpServletResponse) response);
73 }
74 try {
75 if (position == filters.length) {
76 originalChain.doFilter(request, response);
77 }
78 else {
79 position++;
80 MgnlFilter filter = filters[position - 1];
81 if (!filter.bypasses((HttpServletRequest)request)) {
82 filter.doFilter(request, response, this);
83 } else {
84 doFilter(request, response);
85 }
86 }
87 } finally {
88 if (updateCtx) {
89 ((WebContext) ctx).pop();
90 }
91 }
92 }
93
94 public void reset() {
95 position = 0;
96 }
97 }