1 /*
2 * Copyright (C) 2011, 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.transport;
45
46 import java.util.Collection;
47 import java.util.List;
48
49 /**
50 * {@link org.eclipse.jgit.transport.PostReceiveHook} that delegates to a list
51 * of other hooks.
52 * <p>
53 * Hooks are run in the order passed to the constructor.
54 */
55 public class PostReceiveHookChain implements PostReceiveHook {
56 private final PostReceiveHook[] hooks;
57 private final int count;
58
59 /**
60 * Create a new hook chaining the given hooks together.
61 *
62 * @param hooks
63 * hooks to execute, in order.
64 * @return a new hook chain of the given hooks.
65 */
66 public static PostReceiveHook newChain(
67 List<? extends PostReceiveHook> hooks) {
68 PostReceiveHook[] newHooks = new PostReceiveHook[hooks.size()];
69 int i = 0;
70 for (PostReceiveHook hook : hooks)
71 if (hook != PostReceiveHook.NULL)
72 newHooks[i++] = hook;
73 if (i == 0)
74 return PostReceiveHook.NULL;
75 else if (i == 1)
76 return newHooks[0];
77 else
78 return new PostReceiveHookChain(newHooks, i);
79 }
80
81 /** {@inheritDoc} */
82 @Override
83 public void onPostReceive(ReceivePack rp,
84 Collection<ReceiveCommand> commands) {
85 for (int i = 0; i < count; i++)
86 hooks[i].onPostReceive(rp, commands);
87 }
88
89 private PostReceiveHookChain(PostReceiveHook[] hooks, int count) {
90 this.hooks = hooks;
91 this.count = count;
92 }
93 }