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annotate src/org/tmatesoft/hg/internal/PhasesHelper.java @ 658:d10399f80f4e

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javac complained about casts, while eclipse compiler is fine
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 04 Jul 2013 21:09:33 +0200
parents 12a4f60ea972
children 46b56864b483
rev   line source
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1 /*
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2 * Copyright (c) 2012-2013 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.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.repo.HgRepositoryFiles.Phaseroots;
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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.File;
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25 import java.io.FileWriter;
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26 import java.io.IOException;
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27 import java.util.ArrayList;
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28 import java.util.Collection;
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29 import java.util.Collections;
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30 import java.util.HashMap;
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31 import java.util.LinkedList;
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32 import java.util.List;
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33
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34 import org.tmatesoft.hg.core.HgChangeset;
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35 import org.tmatesoft.hg.core.HgIOException;
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36 import org.tmatesoft.hg.core.Nodeid;
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37 import org.tmatesoft.hg.repo.HgChangelog;
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38 import org.tmatesoft.hg.repo.HgInvalidControlFileException;
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39 import org.tmatesoft.hg.repo.HgInvalidStateException;
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40 import org.tmatesoft.hg.repo.HgParentChildMap;
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41 import org.tmatesoft.hg.repo.HgPhase;
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42 import org.tmatesoft.hg.repo.HgRepository;
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43 import org.tmatesoft.hg.repo.HgRuntimeException;
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45 /**
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46 * Support to deal with Mercurial phases feature (as of Mercurial version 2.1)
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47 *
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48 * @see http://mercurial.selenic.com/wiki/Phases
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49 * @see http://mercurial.selenic.com/wiki/PhasesDevel
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50 *
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51 * @author Artem Tikhomirov
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52 * @author TMate Software Ltd.
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53 */
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54 public final class PhasesHelper {
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55
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56 private final Internals repo;
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57 private final HgParentChildMap<HgChangelog> parentHelper;
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58 private Boolean repoSupporsPhases;
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59 private List<Nodeid> draftPhaseRoots;
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60 private List<Nodeid> secretPhaseRoots;
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61 private RevisionDescendants[][] phaseDescendants = new RevisionDescendants[HgPhase.values().length][];
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62
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63 public PhasesHelper(Internals internalRepo) {
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64 this(internalRepo, null);
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65 }
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66
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67 public PhasesHelper(Internals internalRepo, HgParentChildMap<HgChangelog> pw) {
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68 repo = internalRepo;
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69 parentHelper = pw;
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70 }
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71
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72 public HgRepository getRepo() {
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73 return repo.getRepo();
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74 }
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75
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76 public boolean isCapableOfPhases() throws HgRuntimeException {
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77 if (null == repoSupporsPhases) {
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78 repoSupporsPhases = readRoots();
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79 }
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80 return repoSupporsPhases.booleanValue();
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81 }
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83 public boolean withSecretRoots() {
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84 return !secretPhaseRoots.isEmpty();
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85 }
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86
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87 /**
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88 * @param cset revision to query
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89 * @return phase of the changeset, never <code>null</code>
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90 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em>
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91 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em>
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92 */
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93 public HgPhase getPhase(HgChangeset cset) throws HgRuntimeException {
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94 final Nodeid csetRev = cset.getNodeid();
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95 final int csetRevIndex = cset.getRevisionIndex();
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96 return getPhase(csetRevIndex, csetRev);
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97 }
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99 /**
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100 * @param csetRevIndex revision index to query
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101 * @param csetRev revision nodeid, optional
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102 * @return phase of the changeset, never <code>null</code>
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103 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em>
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104 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em>
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105 */
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106 public HgPhase getPhase(final int csetRevIndex, Nodeid csetRev) throws HgRuntimeException {
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107 if (!isCapableOfPhases()) {
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108 return HgPhase.Undefined;
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109 }
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110 // csetRev is only used when parentHelper is available
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111 if (parentHelper != null && (csetRev == null || csetRev.isNull())) {
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112 csetRev = getRepo().getChangelog().getRevision(csetRevIndex);
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113 }
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114
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115 for (HgPhase phase : new HgPhase[] {HgPhase.Secret, HgPhase.Draft }) {
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116 List<Nodeid> roots = getPhaseRoots(phase);
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117 if (roots.isEmpty()) {
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118 continue;
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119 }
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120 if (parentHelper != null) {
449
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121 if (roots.contains(csetRev)) {
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122 return phase;
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123 }
445
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124 if (parentHelper.childrenOf(roots).contains(csetRev)) {
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125 return phase;
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126 }
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127 } else {
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128 // no parent helper
449
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129 // search all descendants.RevisuionDescendats includes root as well.
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130 for (RevisionDescendants rd : getPhaseDescendants(phase)) {
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131 // isCandidate is to go straight to another root if changeset was added later that the current root
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132 if (rd.isCandidate(csetRevIndex) && rd.isDescendant(csetRevIndex)) {
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133 return phase;
445
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134 }
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135 }
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136 }
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137 }
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138 return HgPhase.Public;
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139 }
445
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140
648
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141
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142 /**
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143 * @return all revisions with secret phase
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144 */
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145 public RevisionSet allSecret() {
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146 return allOf(HgPhase.Secret);
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147 }
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148
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149 /**
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150 * @return all revisions with draft phase
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151 */
648
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152 public RevisionSet allDraft() {
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153 return allOf(HgPhase.Draft).subtract(allOf(HgPhase.Secret));
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154 }
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155
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156 public void updateRoots(Collection<Nodeid> draftRoots, Collection<Nodeid> secretRoots) throws HgInvalidControlFileException {
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157 draftPhaseRoots = draftRoots.isEmpty() ? Collections.<Nodeid>emptyList() : new ArrayList<Nodeid>(draftRoots);
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158 secretPhaseRoots = secretRoots.isEmpty() ? Collections.<Nodeid>emptyList() : new ArrayList<Nodeid>(secretRoots);
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159 String fmt = "%d %s\n";
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160 File phaseroots = repo.getRepositoryFile(Phaseroots);
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161 FileWriter fw = null;
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162 try {
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163 fw = new FileWriter(phaseroots);
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164 for (Nodeid n : secretPhaseRoots) {
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165 fw.write(String.format(fmt, HgPhase.Secret.mercurialOrdinal(), n.toString()));
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166 }
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167 for (Nodeid n : draftPhaseRoots) {
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168 fw.write(String.format(fmt, HgPhase.Draft.mercurialOrdinal(), n.toString()));
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169 }
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170 fw.flush();
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171 } catch (IOException ex) {
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172 throw new HgInvalidControlFileException(ex.getMessage(), ex, phaseroots);
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173 } finally {
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174 new FileUtils(repo.getLog(), this).closeQuietly(fw);
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175 }
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176 }
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177
652
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178 public void newCommitNode(Nodeid newChangeset, HgPhase newCommitPhase) throws HgRuntimeException {
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179 final int riCset = repo.getRepo().getChangelog().getRevisionIndex(newChangeset);
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180 HgPhase ph = getPhase(riCset, newChangeset);
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181 if (ph.compareTo(newCommitPhase) >= 0) {
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182 // present phase is more secret than the desired one
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183 return;
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184 }
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185 // newCommitPhase can't be public here, condition above would be satisfied
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186 assert newCommitPhase != HgPhase.Public;
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187 // ph is e.g public when newCommitPhase is draft
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188 // or is draft when desired phase is secret
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189 final RevisionSet rs = allOf(newCommitPhase).union(new RevisionSet(Collections.singleton(newChangeset)));
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190 final RevisionSet newRoots;
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191 if (parentHelper != null) {
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192 newRoots = rs.roots(parentHelper);
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193 } else {
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194 newRoots = rs.roots(repo.getRepo());
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195 }
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196 if (newCommitPhase == HgPhase.Draft) {
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197 updateRoots(newRoots.asList(), secretPhaseRoots);
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198 } else if (newCommitPhase == HgPhase.Secret) {
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199 updateRoots(draftPhaseRoots, newRoots.asList());
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200 } else {
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201 throw new HgInvalidStateException(String.format("Unexpected phase %s for new commits", newCommitPhase));
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202 }
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203 }
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204
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205 /**
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206 * For a given phase, collect all revisions with phase that is the same or more private (i.e. for Draft, returns Draft+Secret)
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207 * The reason is not a nice API intention (which is awful, indeed), but an ease of implementation
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208 */
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209 private RevisionSet allOf(HgPhase phase) {
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210 assert phase != HgPhase.Public;
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211 if (!isCapableOfPhases()) {
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212 return new RevisionSet(Collections.<Nodeid>emptyList());
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213 }
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214 final List<Nodeid> roots = getPhaseRoots(phase);
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215 if (parentHelper != null) {
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216 return new RevisionSet(roots).union(new RevisionSet(parentHelper.childrenOf(roots)));
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217 } else {
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218 RevisionSet rv = new RevisionSet(Collections.<Nodeid>emptyList());
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219 for (RevisionDescendants rd : getPhaseDescendants(phase)) {
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220 rv = rv.union(rd.asRevisionSet());
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221 }
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222 return rv;
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diff changeset
223 }
445
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224 }
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225
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diff changeset
226 private Boolean readRoots() throws HgRuntimeException {
647
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227 File phaseroots = repo.getRepositoryFile(Phaseroots);
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228 try {
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229 if (!phaseroots.exists()) {
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230 return Boolean.FALSE;
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231 }
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232 LineReader lr = new LineReader(phaseroots, repo.getLog());
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233 final Collection<String> lines = lr.read(new LineReader.SimpleLineCollector(), new LinkedList<String>());
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234 HashMap<HgPhase, List<Nodeid>> phase2roots = new HashMap<HgPhase, List<Nodeid>>();
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235 for (String line : lines) {
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236 String[] lc = line.split("\\s+");
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237 if (lc.length == 0) {
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238 continue;
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239 }
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240 if (lc.length != 2) {
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241 repo.getSessionContext().getLog().dump(getClass(), Warn, "Bad line in phaseroots:%s", line);
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242 continue;
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243 }
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244 int phaseIndex = Integer.parseInt(lc[0]);
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245 Nodeid rootRev = Nodeid.fromAscii(lc[1]);
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246 if (!getRepo().getChangelog().isKnown(rootRev)) {
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247 repo.getSessionContext().getLog().dump(getClass(), Warn, "Phase(%d) root node %s doesn't exist in the repository, ignored.", phaseIndex, rootRev);
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248 continue;
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249 }
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250 HgPhase phase = HgPhase.parse(phaseIndex);
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251 List<Nodeid> roots = phase2roots.get(phase);
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252 if (roots == null) {
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253 phase2roots.put(phase, roots = new LinkedList<Nodeid>());
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254 }
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255 roots.add(rootRev);
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256 }
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257 draftPhaseRoots = phase2roots.containsKey(Draft) ? phase2roots.get(Draft) : Collections.<Nodeid>emptyList();
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258 secretPhaseRoots = phase2roots.containsKey(Secret) ? phase2roots.get(Secret) : Collections.<Nodeid>emptyList();
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259 } catch (HgIOException ex) {
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260 throw new HgInvalidControlFileException(ex, true);
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261 }
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262 return Boolean.TRUE;
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263 }
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264
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265 private List<Nodeid> getPhaseRoots(HgPhase phase) {
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266 switch (phase) {
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267 case Draft : return draftPhaseRoots;
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268 case Secret : return secretPhaseRoots;
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269 }
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270 return Collections.emptyList();
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271 }
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272
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273
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274 private RevisionDescendants[] getPhaseDescendants(HgPhase phase) throws HgRuntimeException {
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275 int ordinal = phase.ordinal();
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276 if (phaseDescendants[ordinal] == null) {
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277 phaseDescendants[ordinal] = buildPhaseDescendants(phase);
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278 }
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279 return phaseDescendants[ordinal];
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280 }
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281
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282 private RevisionDescendants[] buildPhaseDescendants(HgPhase phase) throws HgRuntimeException {
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283 int[] roots = toIndexes(getPhaseRoots(phase));
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284 RevisionDescendants[] rv = new RevisionDescendants[roots.length];
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285 for (int i = 0; i < roots.length; i++) {
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286 rv[i] = new RevisionDescendants(getRepo(), roots[i]);
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287 rv[i].build();
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288 }
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289 return rv;
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290 }
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291
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292 private int[] toIndexes(List<Nodeid> roots) throws HgRuntimeException {
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293 int[] rv = new int[roots.size()];
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294 for (int i = 0; i < rv.length; i++) {
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295 rv[i] = getRepo().getChangelog().getRevisionIndex(roots.get(i));
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296 }
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297 return rv;
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298 }
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299 }