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