Mercurial > jhg
annotate src/org/tmatesoft/hg/core/HgFileRevision.java @ 367:2fadf8695f8a
Use 'revision index' instead of the vague 'local revision number' concept in the API
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Fri, 16 Dec 2011 15:37:27 +0100 |
parents | ac8e1ce67730 |
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rev | line source |
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1 /* |
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2 * Copyright (c) 2011 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.core; |
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18 |
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19 import org.tmatesoft.hg.repo.HgDataFile; |
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20 import org.tmatesoft.hg.repo.HgRepository; |
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21 import org.tmatesoft.hg.util.ByteChannel; |
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22 import org.tmatesoft.hg.util.CancelledException; |
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23 import org.tmatesoft.hg.util.Pair; |
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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 * Keeps together information about specific file revision |
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28 * |
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29 * @author Artem Tikhomirov |
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30 * @author TMate Software Ltd. |
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31 */ |
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32 public final class HgFileRevision { |
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33 private final HgRepository repo; |
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34 private final Nodeid revision; |
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35 private final Path path; |
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36 private Path origin; |
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37 private Boolean isCopy = null; // null means not yet known |
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38 private Pair<Nodeid, Nodeid> parents; |
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39 |
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40 public HgFileRevision(HgRepository hgRepo, Nodeid rev, Path p) { |
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41 if (hgRepo == null || rev == null || p == null) { |
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42 // since it's package local, it is our code to blame for non validated arguments |
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43 throw new IllegalArgumentException(); |
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44 } |
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45 repo = hgRepo; |
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46 revision = rev; |
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47 path = p; |
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48 } |
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49 |
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50 // this cons shall be used when we know whether p was a copy. Perhaps, shall pass Map<Path,Path> instead to stress orig argument is not optional |
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51 HgFileRevision(HgRepository hgRepo, Nodeid rev, Path p, Path orig) { |
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52 this(hgRepo, rev, p); |
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53 isCopy = Boolean.valueOf(orig == null); |
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54 origin = orig; |
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55 } |
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56 |
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57 public Path getPath() { |
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58 return path; |
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59 } |
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60 |
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61 public Nodeid getRevision() { |
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62 return revision; |
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63 } |
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64 |
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65 public boolean wasCopied() throws HgException { |
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66 if (isCopy == null) { |
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67 checkCopy(); |
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68 } |
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69 return isCopy.booleanValue(); |
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70 } |
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71 /** |
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72 * @return <code>null</code> if {@link #wasCopied()} is <code>false</code>, name of the copy source otherwise. |
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73 */ |
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74 public Path getOriginIfCopy() throws HgException { |
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75 if (wasCopied()) { |
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76 return origin; |
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77 } |
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78 return null; |
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79 } |
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80 |
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81 /** |
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82 * Access revisions this file revision originates from. |
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83 * Note, these revisions are records in the file history, not that of the whole repository (aka changeset revisions) |
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84 * In most cases, only one parent revision would be present, only for merge revisions one can expect both. |
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85 * |
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86 * @return parent revisions of this file revision, with {@link Nodeid#NULL} for missing values. |
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87 */ |
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88 public Pair<Nodeid, Nodeid> getParents() throws HgInvalidControlFileException { |
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89 if (parents == null) { |
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90 HgDataFile fn = repo.getFileNode(path); |
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91 int revisionIndex = fn.getRevisionIndex(revision); |
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92 int[] pr = new int[2]; |
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93 byte[] p1 = new byte[20], p2 = new byte[20]; |
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94 // XXX Revlog#parents is not the best method to use here |
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95 // need smth that gives Nodeids (piped through Pool<Nodeid> from repo's context) |
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96 fn.parents(revisionIndex, pr, p1, p2); |
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97 parents = new Pair<Nodeid, Nodeid>(Nodeid.fromBinary(p1, 0), Nodeid.fromBinary(p2, 0)); |
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98 } |
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99 return parents; |
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100 } |
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101 |
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102 public void putContentTo(ByteChannel sink) throws HgDataStreamException, HgInvalidControlFileException, CancelledException { |
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103 HgDataFile fn = repo.getFileNode(path); |
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104 int revisionIndex = fn.getRevisionIndex(revision); |
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105 fn.contentWithFilters(revisionIndex, sink); |
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106 } |
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107 |
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108 private void checkCopy() throws HgInvalidControlFileException, HgDataStreamException { |
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109 HgDataFile fn = repo.getFileNode(path); |
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110 if (fn.isCopy()) { |
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111 if (fn.getRevision(0).equals(revision)) { |
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112 // this HgFileRevision represents first revision of the copy |
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113 isCopy = Boolean.TRUE; |
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114 origin = fn.getCopySourceName(); |
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115 return; |
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116 } |
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117 } |
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118 isCopy = Boolean.FALSE; |
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119 } |
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120 } |