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annotate src/org/tmatesoft/hg/internal/ManifestRevision.java @ 709:497e697636fc

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Report merged lines as changed block if possible, not as a sequence of added/deleted blocks. To facilitate access to merge parent lines AddBlock got mergeLineAt() method that reports index of the line in the second parent (if any), while insertedAt() has been changed to report index in the first parent always
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 21 Aug 2013 16:23:27 +0200
parents 7743a9c10bfa
children
rev   line source
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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 static org.tmatesoft.hg.repo.HgRepository.NO_REVISION;
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20
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21 import java.util.Collection;
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22 import java.util.TreeMap;
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24 import org.tmatesoft.hg.core.Nodeid;
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25 import org.tmatesoft.hg.repo.HgManifest;
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26 import org.tmatesoft.hg.repo.HgRepository;
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27 import org.tmatesoft.hg.util.Convertor;
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28 import org.tmatesoft.hg.util.Path;
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30 /**
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31 * Specific revision of the manifest.
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32 * Note, suited to keep single revision only ({@link #revision()}), which is linked to changeset {@link #changesetRevisionIndex()}.
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33 *
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34 * @author Artem Tikhomirov
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35 * @author TMate Software Ltd.
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36 */
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37 public final class ManifestRevision implements HgManifest.Inspector {
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38 private final TreeMap<Path, Nodeid> idsMap;
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39 private final TreeMap<Path, HgManifest.Flags> flagsMap;
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40 private final Convertor<Nodeid> idsPool;
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41 private final Convertor<Path> namesPool;
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42 private Nodeid manifestRev = Nodeid.NULL;
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43 private int changelogRevIndex = NO_REVISION, manifestRevIndex = NO_REVISION;
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44
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45 // optional pools for effective management of nodeids and filenames (they are likely
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46 // to be duplicated among different manifest revisions
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47 public ManifestRevision(Pool<Nodeid> nodeidPool, Convertor<Path> filenamePool) {
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48 idsPool = nodeidPool;
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49 namesPool = filenamePool;
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50 idsMap = new TreeMap<Path, Nodeid>();
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51 flagsMap = new TreeMap<Path, HgManifest.Flags>();
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52 }
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53
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54 public ManifestRevision init(HgRepository hgRepo, int csetIndex) {
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55 hgRepo.getManifest().walk(csetIndex, csetIndex, this);
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56 return this;
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57 }
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58
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59 public Collection<Path> files() {
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60 return idsMap.keySet();
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61 }
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62
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63 public boolean contains(Path file) {
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64 return idsMap.containsKey(file);
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65 }
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66
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67 public Nodeid nodeid(Path fname) {
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68 return idsMap.get(fname);
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69 }
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70
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71 public HgManifest.Flags flags(Path fname) {
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72 HgManifest.Flags f = flagsMap.get(fname);
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73 return f == null ? HgManifest.Flags.RegularFile : f;
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74 }
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75
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76 /**
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77 * @return identifier of this manifest revision
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78 */
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79 public Nodeid revision() {
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80 return manifestRev;
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81 }
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82
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83 public int revisionIndex() {
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84 return manifestRevIndex;
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85 }
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87 /**
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88 * @return revision index for the changelog this manifest revision is linked to
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89 */
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90 public int changesetRevisionIndex() {
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91 return changelogRevIndex;
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92 }
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94 //
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95
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96 public boolean next(Nodeid nid, Path fname, HgManifest.Flags flags) {
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97 if (namesPool != null) {
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98 fname = namesPool.mangle(fname);
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99 }
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100 if (idsPool != null) {
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101 nid = idsPool.mangle(nid);
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102 }
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103 idsMap.put(fname, nid);
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104 if (flags != HgManifest.Flags.RegularFile) {
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105 // TreeMap$Entry takes 32 bytes. No reason to keep regular file attribute (in fact, no flags state)
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106 // for such price
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107 // Alternatively, Map<Path, Pair<Nodeid, Flags>> might come as a solution
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108 // however, with low rate of elements with flags this would consume more memory
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109 // than two distinct maps (sizeof(Pair) == 16).
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110 // Map<Pair>: n*(32+16)
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111 // 2 Maps: n*32 + m*32 <-- consumes more with m>n/2
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112 flagsMap.put(fname, flags);
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113 }
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114 return true;
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115 }
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116
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117 public boolean end(int revision) {
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118 // in fact, this class cares about single revision
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119 return false;
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120 }
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121
537
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122 public boolean begin(int revisionIndex, Nodeid revision, int changelogRevisionIndex) {
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123 if (manifestRev != null) {
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124 idsMap.clear();
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125 flagsMap.clear();
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126 }
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127 manifestRev = revision;
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128 manifestRevIndex = revisionIndex;
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129 changelogRevIndex = changelogRevisionIndex;
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130 return true;
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131 }
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132 }