1 /*
2 * Copyright (C) 2009-2010, Google Inc.
3 * and other copyright owners as documented in the project's IP log.
4 *
5 * This program and the accompanying materials are made available
6 * under the terms of the Eclipse Distribution License v1.0 which
7 * accompanies this distribution, is reproduced below, and is
8 * available at http://www.eclipse.org/org/documents/edl-v10.php
9 *
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials provided
22 * with the distribution.
23 *
24 * - Neither the name of the Eclipse Foundation, Inc. nor the
25 * names of its contributors may be used to endorse or promote
26 * products derived from this software without specific prior
27 * written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
34 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43
44 package org.eclipse.jgit.http.server.glue;
45
46 import java.util.ArrayList;
47 import java.util.List;
48
49 import javax.servlet.Filter;
50 import javax.servlet.http.HttpServlet;
51 import javax.servlet.http.HttpServletResponse;
52
53 import org.eclipse.jgit.http.server.HttpServerText;
54
55 abstract class ServletBinderImpl implements ServletBinder {
56 private final List<Filter> filters;
57
58 private HttpServlet httpServlet;
59
60 ServletBinderImpl() {
61 this.filters = new ArrayList<>();
62 }
63
64 @Override
65 public ServletBinder through(Filter filter) {
66 if (filter == null)
67 throw new NullPointerException(HttpServerText.get().filterMustNotBeNull);
68 filters.add(filter);
69 return this;
70 }
71
72 @Override
73 public void with(HttpServlet servlet) {
74 if (servlet == null)
75 throw new NullPointerException(HttpServerText.get().servletMustNotBeNull);
76 if (httpServlet != null)
77 throw new IllegalStateException(HttpServerText.get().servletWasAlreadyBound);
78 httpServlet = servlet;
79 }
80
81 /** @return the configured servlet, or singleton returning 404 if none. */
82 protected HttpServlet getServlet() {
83 if (httpServlet != null)
84 return httpServlet;
85 else
86 return new ErrorServlet(HttpServletResponse.SC_NOT_FOUND);
87 }
88
89 /** @return the configured filters; zero-length array if none. */
90 protected Filter[] getFilters() {
91 return filters.toArray(new Filter[filters.size()]);
92 }
93
94 /** @return the pipeline that matches and executes this chain. */
95 abstract UrlPipeline create();
96 }