1 /*
2 * Copyright (C) 2019, Matthias Sohn <matthias.sohn@sap.com> and others
3 *
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Distribution License v. 1.0 which is available at
6 * https://www.eclipse.org/org/documents/edl-v10.php.
7 *
8 * SPDX-License-Identifier: BSD-3-Clause
9 */
10 package org.eclipse.jgit.junit.time;
11
12 import java.io.IOException;
13 import java.io.UncheckedIOException;
14 import java.nio.file.Files;
15 import java.nio.file.Path;
16 import java.nio.file.attribute.FileTime;
17 import java.time.Instant;
18
19 import org.eclipse.jgit.util.FS;
20
21 /**
22 * Utility methods for handling timestamps
23 *
24 * @since 5.1.9
25 */
26 public class TimeUtil {
27 /**
28 * Set the lastModified time of a given file by adding a given offset to the
29 * current lastModified time
30 *
31 * @param path
32 * path of a file to set last modified
33 * @param offsetMillis
34 * offset in milliseconds, if negative the new lastModified time
35 * is offset before the original lastModified time, otherwise
36 * after the original time
37 * @return the new lastModified time
38 */
39 public static Instant setLastModifiedWithOffset(Path path,
40 long offsetMillis) {
41 Instant mTime = FS.DETECTED.lastModifiedInstant(path)
42 .plusMillis(offsetMillis);
43 try {
44 Files.setLastModifiedTime(path, FileTime.from(mTime));
45 return mTime;
46 } catch (IOException e) {
47 throw new UncheckedIOException(e);
48 }
49 }
50
51 /**
52 * Set the lastModified time of file a to the one from file b
53 *
54 * @param a
55 * file to set lastModified time
56 * @param b
57 * file to read lastModified time from
58 */
59 public static void setLastModifiedOf(Path a, Path b) {
60 Instant mTime = FS.DETECTED.lastModifiedInstant(b);
61 try {
62 Files.setLastModifiedTime(a, FileTime.from(mTime));
63 } catch (IOException e) {
64 throw new UncheckedIOException(e);
65 }
66 }
67
68 }