1 /*
2 * Copyright (C) 2016, 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.internal.storage.reftree;
45
46 import java.io.IOException;
47
48 import org.eclipse.jgit.lib.ObjectIdRef;
49 import org.eclipse.jgit.lib.Ref;
50 import org.eclipse.jgit.lib.RefDatabase;
51 import org.eclipse.jgit.lib.RefUpdate;
52 import org.eclipse.jgit.lib.Repository;
53
54 /** Update that always rejects with {@code LOCK_FAILURE}. */
55 class AlwaysFailUpdate extends RefUpdate {
56 private final RefTreeDatabase refdb;
57
58 AlwaysFailUpdate(RefTreeDatabase refdb, String name) {
59 super(new ObjectIdRef.Unpeeled(Ref.Storage.NEW, name, null));
60 this.refdb = refdb;
61 setCheckConflicting(false);
62 }
63
64 @Override
65 protected RefDatabase getRefDatabase() {
66 return refdb;
67 }
68
69 @Override
70 protected Repository getRepository() {
71 return refdb.getRepository();
72 }
73
74 @Override
75 protected boolean tryLock(boolean deref) throws IOException {
76 return false;
77 }
78
79 @Override
80 protected void unlock() {
81 // No locks are held here.
82 }
83
84 @Override
85 protected Result doUpdate(Result desiredResult) {
86 return Result.LOCK_FAILURE;
87 }
88
89 @Override
90 protected Result doDelete(Result desiredResult) {
91 return Result.LOCK_FAILURE;
92 }
93
94 @Override
95 protected Result doLink(String target) {
96 return Result.LOCK_FAILURE;
97 }
98 }