Mercurial > jhg

comparison src/org/tmatesoft/hg/internal/ChangelogHelper.java @ 128:44b97930570c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Introduced ChangelogHelper to look up changesets files were modified in
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 16 Feb 2011 20:13:41 +0100
parents
children 645829962785
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127:2e395db595e2 128:44b97930570c
1 /*
2 * Copyright (c) 2011 TMate Software Ltd
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * For information on how to redistribute this software under
14 * the terms of a license other than GNU General Public License
15 * contact TMate Software at support@hg4j.com
16 */
17 package org.tmatesoft.hg.internal;
18
19 import java.util.TreeMap;
20
21 import org.tmatesoft.hg.core.Path;
22 import org.tmatesoft.hg.repo.Changeset;
23 import org.tmatesoft.hg.repo.HgDataFile;
24 import org.tmatesoft.hg.repo.HgInternals;
25 import org.tmatesoft.hg.repo.HgRepository;
26
27 /**
28 *
29 * @author Artem Tikhomirov
30 * @author TMate Software Ltd.
31 */
32 public class ChangelogHelper {
33 private final int leftBoundary;
34 private final HgRepository repo;
35 private final TreeMap<Integer, Changeset> cache = new TreeMap<Integer, Changeset>();
36
37 /**
38 * @param hgRepo
39 * @param leftBoundaryRevision walker never visits revisions with local numbers less than specified,
40 * IOW only revisions [leftBoundaryRevision..TIP] are considered.
41 */
42 public ChangelogHelper(HgRepository hgRepo, int leftBoundaryRevision) {
43 repo = hgRepo;
44 leftBoundary = leftBoundaryRevision;
45 }
46
47 /**
48 * @return the repo
49 */
50 public HgRepository getRepo() {
51 return repo;
52 }
53
54 /**
55 * Walks changelog in reverse order
56 * @param file
57 * @return changeset where specified file is mentioned among affected files, or
58 * <code>null</code> if none found up to leftBoundary
59 */
60 public Changeset findLatestChangeWith(Path file) {
61 HgDataFile df = repo.getFileNode(file);
62 int changelogRev = df.getChangesetLocalRevision(HgRepository.TIP);
63 if (changelogRev >= leftBoundary) {
64 // the method is likely to be invoked for different files,
65 // while changesets might be the same. Cache 'em not to read too much.
66 Changeset cs = cache.get(changelogRev);
67 if (cs == null) {
68 cs = repo.getChangelog().range(changelogRev, changelogRev).get(0);
69 cache.put(changelogRev, cs);
70 }
71 return cs;
72 }
73 return null;
74 }
75
76 public String getNextCommitUsername() {
77 return new HgInternals(repo).getNextCommitUsername();
78 }
79 }