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annotate src/org/tmatesoft/hg/internal/FileHistory.java @ 710:cf200271439a

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author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 07 Oct 2013 01:56:05 +0200
parents 72fc7774b87e
children
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1 /*
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2 * Copyright (c) 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 static org.tmatesoft.hg.core.HgIterateDirection.NewToOld;
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20 import static org.tmatesoft.hg.core.HgIterateDirection.OldToNew;
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21
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22 import java.util.Collections;
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23 import java.util.LinkedList;
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24
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25 import org.tmatesoft.hg.core.HgIterateDirection;
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26 import org.tmatesoft.hg.core.Nodeid;
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27 import org.tmatesoft.hg.internal.FileRenameHistory.Chunk;
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28 import org.tmatesoft.hg.repo.HgDataFile;
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29 import org.tmatesoft.hg.repo.HgRuntimeException;
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30
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31 /**
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32 * History of a file, with copy/renames, and corresponding revision information.
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33 * Facility for file history iteration.
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34 *
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35 * TODO [post-1.1] Utilize in HgLogCommand and anywhere else we need to follow file history
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36 *
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37 * @author Artem Tikhomirov
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38 * @author TMate Software Ltd.
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39 */
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40 public class FileHistory {
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41
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42 private LinkedList<FileRevisionHistoryChunk> fileCompleteHistory = new LinkedList<FileRevisionHistoryChunk>();
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43 private final HgDataFile df;
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44 private final int csetTo;
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45 private final int csetFrom;
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46
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47 public FileHistory(HgDataFile file, int fromChangeset, int toChangeset) {
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48 df = file;
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49 csetFrom = fromChangeset;
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50 csetTo = toChangeset;
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51 }
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52
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53 public int getStartChangeset() {
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54 return csetFrom;
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55 }
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56
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57 public int getEndChangeset() {
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58 return csetTo;
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59 }
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60
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61 public void build() throws HgRuntimeException {
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62 fileCompleteHistory.clear(); // just in case, #build() is not expected to be called more than once
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63 Nodeid fileRev = df.getRepo().getManifest().getFileRevision(csetTo, df.getPath());
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64 int fileRevIndex = df.getRevisionIndex(fileRev);
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65 FileRenameHistory frh = new FileRenameHistory(csetFrom, csetTo);
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66 if (frh.isOutOfRange(df, fileRevIndex)) {
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67 return;
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68 }
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69 frh.build(df, fileRevIndex);
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70 FileRevisionHistoryChunk prevChunk = null;
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71 for (Chunk c : frh.iterate(OldToNew)) {
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72 FileRevisionHistoryChunk fileHistory = new FileRevisionHistoryChunk(c.file(), c.firstCset(), c.lastCset(), c.firstFileRev(), c.lastFileRev());
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73 fileHistory.init();
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74 if (fileHistory.revisionCount() == 0) {
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75 // no revisions on our cset range of interest
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76 continue;
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77 }
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78 if (prevChunk != null) {
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79 prevChunk.linkTo(fileHistory);
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80 }
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81 fileCompleteHistory.addLast(fileHistory); // to get the list in old-to-new order
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82 prevChunk = fileHistory;
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83 }
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84 // fileCompleteHistory is in (origin, intermediate target, ultimate target) order
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85 }
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86
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87 public Iterable<FileRevisionHistoryChunk> iterate(HgIterateDirection order) {
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88 if (order == NewToOld) {
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89 return ReverseIterator.reversed(fileCompleteHistory);
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90 }
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91 return Collections.unmodifiableList(fileCompleteHistory);
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92 }
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93 }