Mercurial > jhg
annotate src/org/tmatesoft/hg/internal/ChangelogHelper.java @ 686:f1f095e42555
Annotated file is not always changed in the latest changeset, need to find out last changest it was changed at (iow, diffed to with BlameHelper)
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Thu, 25 Jul 2013 22:12:14 +0200 (2013-07-25) |
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1 /* |
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2 * Copyright (c) 2011-2013 TMate Software Ltd |
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3 * |
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4 * This program is free software; you can redistribute it and/or modify |
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5 * it under the terms of the GNU General Public License as published by |
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6 * the Free Software Foundation; version 2 of the License. |
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7 * |
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8 * This program is distributed in the hope that it will be useful, |
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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11 * GNU General Public License for more details. |
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12 * |
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13 * For information on how to redistribute this software under |
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14 * the terms of a license other than GNU General Public License |
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15 * contact TMate Software at support@hg4j.com |
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16 */ |
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17 package org.tmatesoft.hg.internal; |
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18 |
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19 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset; |
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20 import org.tmatesoft.hg.repo.HgDataFile; |
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21 import org.tmatesoft.hg.repo.HgInternals; |
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22 import org.tmatesoft.hg.repo.HgRepository; |
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23 import org.tmatesoft.hg.repo.HgRuntimeException; |
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24 import org.tmatesoft.hg.util.Path; |
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25 |
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26 /** |
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27 * |
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28 * @author Artem Tikhomirov |
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29 * @author TMate Software Ltd. |
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30 */ |
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31 public class ChangelogHelper { |
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32 private final int leftBoundary; |
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33 private final HgRepository repo; |
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34 private final IntMap<RawChangeset> cache = new IntMap<RawChangeset>(32); |
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35 private String nextCommitAuthor; |
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36 |
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37 /** |
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38 * @param hgRepo |
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39 * @param leftBoundaryRevision walker never visits revisions with local numbers less than specified, |
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40 * IOW only revisions [leftBoundaryRevision..TIP] are considered. |
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41 */ |
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42 public ChangelogHelper(HgRepository hgRepo, int leftBoundaryRevision) { |
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43 repo = hgRepo; |
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44 leftBoundary = leftBoundaryRevision; |
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45 } |
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46 |
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47 /** |
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48 * @return the repo |
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49 */ |
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50 public HgRepository getRepo() { |
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51 return repo; |
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52 } |
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53 |
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54 /** |
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55 * Walks changelog in reverse order |
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56 * @param file |
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57 * @return changeset where specified file is mentioned among affected files, or <code>null</code> if none found up to leftBoundary |
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58 */ |
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59 public RawChangeset findLatestChangeWith(Path file) throws HgRuntimeException { |
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60 HgDataFile df = repo.getFileNode(file); |
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61 if (!df.exists()) { |
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62 return null; |
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63 } |
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64 int changelogRev = df.getChangesetRevisionIndex(HgRepository.TIP); |
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65 if (changelogRev >= leftBoundary) { |
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66 // the method is likely to be invoked for different files, |
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67 // while changesets might be the same. Cache 'em not to read too much. |
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68 RawChangeset cs = cache.get(changelogRev); |
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69 if (cs == null) { |
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70 cs = repo.getChangelog().range(changelogRev, changelogRev).get(0); |
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71 cache.put(changelogRev, cs); |
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72 } |
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73 return cs; |
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74 } |
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75 return null; |
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76 } |
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77 |
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78 public String getNextCommitUsername() { |
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79 if (nextCommitAuthor == null) { |
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80 nextCommitAuthor = new HgInternals(repo).getNextCommitUsername(); |
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81 } |
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82 return nextCommitAuthor; |
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83 } |
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84 } |