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annotate src/org/tmatesoft/hg/internal/PhasesHelper.java @ 576:3c4db86e8c1f

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Issue 43: poor performance with InflaterDataAccess. Phase 2: inflate into buffer, effective skip and readByte/readBytes()
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 16 Apr 2013 19:31:57 +0200
parents d2f6ab541330
children 6526d8adbc0f
rev   line source
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1 /*
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2 * Copyright (c) 2012 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.HgPhase.Draft;
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20 import static org.tmatesoft.hg.repo.HgPhase.Secret;
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21 import static org.tmatesoft.hg.util.LogFacility.Severity.Info;
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22 import static org.tmatesoft.hg.util.LogFacility.Severity.Warn;
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23
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24 import java.io.BufferedReader;
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25 import java.io.File;
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26 import java.io.FileReader;
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27 import java.io.IOException;
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28 import java.util.Collections;
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29 import java.util.HashMap;
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30 import java.util.LinkedList;
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31 import java.util.List;
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32
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33 import org.tmatesoft.hg.core.HgChangeset;
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34 import org.tmatesoft.hg.core.Nodeid;
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35 import org.tmatesoft.hg.repo.HgChangelog;
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36 import org.tmatesoft.hg.repo.HgInvalidControlFileException;
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37 import org.tmatesoft.hg.repo.HgParentChildMap;
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38 import org.tmatesoft.hg.repo.HgPhase;
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39 import org.tmatesoft.hg.repo.HgRepository;
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40
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41 /**
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42 * Support to deal with Mercurial phases feature (as of Mercurial version 2.1)
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43 *
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44 * @see http://mercurial.selenic.com/wiki/Phases
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45 * @see http://mercurial.selenic.com/wiki/PhasesDevel
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46 *
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47 * @author Artem Tikhomirov
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48 * @author TMate Software Ltd.
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49 */
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50 public final class PhasesHelper {
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51
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52 private final Internals repo;
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53 private final HgParentChildMap<HgChangelog> parentHelper;
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54 private Boolean repoSupporsPhases;
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55 private List<Nodeid> draftPhaseRoots;
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56 private List<Nodeid> secretPhaseRoots;
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57 private RevisionDescendants[][] phaseDescendants = new RevisionDescendants[HgPhase.values().length][];
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58
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59 public PhasesHelper(Internals internalRepo) {
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60 this(internalRepo, null);
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61 }
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62
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63 public PhasesHelper(Internals internalRepo, HgParentChildMap<HgChangelog> pw) {
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64 repo = internalRepo;
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65 parentHelper = pw;
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66 }
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67
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68 public HgRepository getRepo() {
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69 return repo.getRepo();
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70 }
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71
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72 public boolean isCapableOfPhases() throws HgInvalidControlFileException {
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73 if (null == repoSupporsPhases) {
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74 repoSupporsPhases = readRoots();
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75 }
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76 return repoSupporsPhases.booleanValue();
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77 }
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78
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79
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80 public HgPhase getPhase(HgChangeset cset) throws HgInvalidControlFileException {
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81 final Nodeid csetRev = cset.getNodeid();
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82 final int csetRevIndex = cset.getRevisionIndex();
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83 return getPhase(csetRevIndex, csetRev);
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84 }
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85
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86 public HgPhase getPhase(final int csetRevIndex, Nodeid csetRev) throws HgInvalidControlFileException {
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87 if (!isCapableOfPhases()) {
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88 return HgPhase.Undefined;
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89 }
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90 // csetRev is only used when parentHelper is available
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91 if (parentHelper != null && (csetRev == null || csetRev.isNull())) {
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92 csetRev = getRepo().getChangelog().getRevision(csetRevIndex);
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93 }
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94
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95 for (HgPhase phase : new HgPhase[] {HgPhase.Secret, HgPhase.Draft }) {
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96 List<Nodeid> roots = getPhaseRoots(phase);
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97 if (roots.isEmpty()) {
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98 continue;
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99 }
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100 if (parentHelper != null) {
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101 if (roots.contains(csetRev)) {
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102 return phase;
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103 }
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104 if (parentHelper.childrenOf(roots).contains(csetRev)) {
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105 return phase;
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106 }
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107 } else {
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108 // no parent helper
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109 // search all descendants.RevisuionDescendats includes root as well.
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110 for (RevisionDescendants rd : getPhaseDescendants(phase)) {
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111 // isCandidate is to go straight to another root if changeset was added later that the current root
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112 if (rd.isCandidate(csetRevIndex) && rd.isDescendant(csetRevIndex)) {
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113 return phase;
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114 }
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115 }
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116 }
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117 }
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118 return HgPhase.Public;
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119
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120 }
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121
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122 private Boolean readRoots() throws HgInvalidControlFileException {
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123 File phaseroots = repo.getFileFromStoreDir("phaseroots");
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124 BufferedReader br = null;
445
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125 try {
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126 if (!phaseroots.exists()) {
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127 return Boolean.FALSE;
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128 }
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129 HashMap<HgPhase, List<Nodeid>> phase2roots = new HashMap<HgPhase, List<Nodeid>>();
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130 br = new BufferedReader(new FileReader(phaseroots));
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131 String line;
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132 while ((line = br.readLine()) != null) {
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133 String[] lc = line.trim().split("\\s+");
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134 if (lc.length == 0) {
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135 continue;
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136 }
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137 if (lc.length != 2) {
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138 repo.getSessionContext().getLog().dump(getClass(), Warn, "Bad line in phaseroots:%s", line);
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139 continue;
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140 }
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141 int phaseIndex = Integer.parseInt(lc[0]);
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142 Nodeid rootRev = Nodeid.fromAscii(lc[1]);
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143 if (!getRepo().getChangelog().isKnown(rootRev)) {
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144 repo.getSessionContext().getLog().dump(getClass(), Warn, "Phase(%d) root node %s doesn't exist in the repository, ignored.", phaseIndex, rootRev);
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145 continue;
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146 }
445
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147 HgPhase phase = HgPhase.parse(phaseIndex);
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148 List<Nodeid> roots = phase2roots.get(phase);
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149 if (roots == null) {
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150 phase2roots.put(phase, roots = new LinkedList<Nodeid>());
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151 }
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152 roots.add(rootRev);
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153 }
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154 draftPhaseRoots = phase2roots.containsKey(Draft) ? phase2roots.get(Draft) : Collections.<Nodeid>emptyList();
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155 secretPhaseRoots = phase2roots.containsKey(Secret) ? phase2roots.get(Secret) : Collections.<Nodeid>emptyList();
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156 } catch (IOException ex) {
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157 throw new HgInvalidControlFileException(ex.toString(), ex, phaseroots);
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158 } finally {
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159 if (br != null) {
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160 try {
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161 br.close();
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162 } catch (IOException ex) {
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163 repo.getSessionContext().getLog().dump(getClass(), Info, ex, null);
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164 // ignore the exception otherwise
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165 }
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166 }
445
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167 }
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168 return Boolean.TRUE;
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169 }
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170
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171 private List<Nodeid> getPhaseRoots(HgPhase phase) {
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172 switch (phase) {
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173 case Draft : return draftPhaseRoots;
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174 case Secret : return secretPhaseRoots;
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175 }
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176 return Collections.emptyList();
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177 }
449
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178
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179
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180 private RevisionDescendants[] getPhaseDescendants(HgPhase phase) throws HgInvalidControlFileException {
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181 int ordinal = phase.ordinal();
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182 if (phaseDescendants[ordinal] == null) {
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183 phaseDescendants[ordinal] = buildPhaseDescendants(phase);
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184 }
449
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185 return phaseDescendants[ordinal];
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186 }
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187
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188 private RevisionDescendants[] buildPhaseDescendants(HgPhase phase) throws HgInvalidControlFileException {
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189 int[] roots = toIndexes(getPhaseRoots(phase));
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190 RevisionDescendants[] rv = new RevisionDescendants[roots.length];
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191 for (int i = 0; i < roots.length; i++) {
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192 rv[i] = new RevisionDescendants(getRepo(), roots[i]);
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193 rv[i].build();
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194 }
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195 return rv;
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196 }
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197
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198 private int[] toIndexes(List<Nodeid> roots) throws HgInvalidControlFileException {
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199 int[] rv = new int[roots.size()];
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200 for (int i = 0; i < rv.length; i++) {
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201 rv[i] = getRepo().getChangelog().getRevisionIndex(roots.get(i));
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202 }
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203 return rv;
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204 }
445
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205 }