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annotate src/org/tmatesoft/hg/internal/PhasesHelper.java @ 628:6526d8adbc0f

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Explicit HgRuntimeException to facilitate easy switch from runtime to checked exceptions
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 22 May 2013 15:52:31 +0200
parents d2f6ab541330
children c75297c17867
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.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 import org.tmatesoft.hg.repo.HgRuntimeException;
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41
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42 /**
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43 * Support to deal with Mercurial phases feature (as of Mercurial version 2.1)
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44 *
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45 * @see http://mercurial.selenic.com/wiki/Phases
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46 * @see http://mercurial.selenic.com/wiki/PhasesDevel
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47 *
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48 * @author Artem Tikhomirov
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49 * @author TMate Software Ltd.
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50 */
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51 public final class PhasesHelper {
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52
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53 private final Internals repo;
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54 private final HgParentChildMap<HgChangelog> parentHelper;
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55 private Boolean repoSupporsPhases;
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56 private List<Nodeid> draftPhaseRoots;
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57 private List<Nodeid> secretPhaseRoots;
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58 private RevisionDescendants[][] phaseDescendants = new RevisionDescendants[HgPhase.values().length][];
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59
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60 public PhasesHelper(Internals internalRepo) {
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61 this(internalRepo, null);
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62 }
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63
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64 public PhasesHelper(Internals internalRepo, HgParentChildMap<HgChangelog> pw) {
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65 repo = internalRepo;
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66 parentHelper = pw;
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67 }
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68
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69 public HgRepository getRepo() {
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70 return repo.getRepo();
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71 }
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72
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73 public boolean isCapableOfPhases() throws HgRuntimeException {
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74 if (null == repoSupporsPhases) {
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75 repoSupporsPhases = readRoots();
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76 }
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77 return repoSupporsPhases.booleanValue();
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78 }
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79
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80
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81 /**
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82 * @param cset revision to query
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83 * @return phase of the changeset, never <code>null</code>
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84 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em>
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85 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em>
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86 */
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87 public HgPhase getPhase(HgChangeset cset) throws HgRuntimeException {
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88 final Nodeid csetRev = cset.getNodeid();
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89 final int csetRevIndex = cset.getRevisionIndex();
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90 return getPhase(csetRevIndex, csetRev);
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91 }
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92
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93 /**
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94 * @param csetRevIndex revision index to query
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95 * @param csetRev revision nodeid, optional
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96 * @return phase of the changeset, never <code>null</code>
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97 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em>
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98 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em>
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99 */
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100 public HgPhase getPhase(final int csetRevIndex, Nodeid csetRev) throws HgRuntimeException {
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101 if (!isCapableOfPhases()) {
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102 return HgPhase.Undefined;
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103 }
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104 // csetRev is only used when parentHelper is available
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105 if (parentHelper != null && (csetRev == null || csetRev.isNull())) {
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106 csetRev = getRepo().getChangelog().getRevision(csetRevIndex);
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107 }
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108
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109 for (HgPhase phase : new HgPhase[] {HgPhase.Secret, HgPhase.Draft }) {
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110 List<Nodeid> roots = getPhaseRoots(phase);
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111 if (roots.isEmpty()) {
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112 continue;
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113 }
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114 if (parentHelper != null) {
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115 if (roots.contains(csetRev)) {
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116 return phase;
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117 }
445
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118 if (parentHelper.childrenOf(roots).contains(csetRev)) {
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119 return phase;
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120 }
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121 } else {
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122 // no parent helper
449
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123 // search all descendants.RevisuionDescendats includes root as well.
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124 for (RevisionDescendants rd : getPhaseDescendants(phase)) {
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125 // isCandidate is to go straight to another root if changeset was added later that the current root
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126 if (rd.isCandidate(csetRevIndex) && rd.isDescendant(csetRevIndex)) {
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127 return phase;
445
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128 }
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129 }
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130 }
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131 }
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132 return HgPhase.Public;
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133
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134 }
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135
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136 private Boolean readRoots() throws HgRuntimeException {
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137 File phaseroots = repo.getFileFromStoreDir("phaseroots"); // TODO into HgRepositoryFiles
451
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138 BufferedReader br = null;
445
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139 try {
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140 if (!phaseroots.exists()) {
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141 return Boolean.FALSE;
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142 }
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143 HashMap<HgPhase, List<Nodeid>> phase2roots = new HashMap<HgPhase, List<Nodeid>>();
451
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144 br = new BufferedReader(new FileReader(phaseroots));
445
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145 String line;
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146 while ((line = br.readLine()) != null) {
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147 String[] lc = line.trim().split("\\s+");
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148 if (lc.length == 0) {
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149 continue;
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150 }
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151 if (lc.length != 2) {
501
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152 repo.getSessionContext().getLog().dump(getClass(), Warn, "Bad line in phaseroots:%s", line);
445
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153 continue;
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154 }
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155 int phaseIndex = Integer.parseInt(lc[0]);
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156 Nodeid rootRev = Nodeid.fromAscii(lc[1]);
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157 if (!getRepo().getChangelog().isKnown(rootRev)) {
501
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diff changeset
158 repo.getSessionContext().getLog().dump(getClass(), Warn, "Phase(%d) root node %s doesn't exist in the repository, ignored.", phaseIndex, rootRev);
451
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diff changeset
159 continue;
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160 }
445
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161 HgPhase phase = HgPhase.parse(phaseIndex);
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162 List<Nodeid> roots = phase2roots.get(phase);
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163 if (roots == null) {
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164 phase2roots.put(phase, roots = new LinkedList<Nodeid>());
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165 }
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166 roots.add(rootRev);
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167 }
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168 draftPhaseRoots = phase2roots.containsKey(Draft) ? phase2roots.get(Draft) : Collections.<Nodeid>emptyList();
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169 secretPhaseRoots = phase2roots.containsKey(Secret) ? phase2roots.get(Secret) : Collections.<Nodeid>emptyList();
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170 } catch (IOException ex) {
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171 throw new HgInvalidControlFileException(ex.toString(), ex, phaseroots);
451
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172 } finally {
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diff changeset
173 if (br != null) {
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diff changeset
174 try {
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175 br.close();
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176 } catch (IOException ex) {
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diff changeset
177 repo.getSessionContext().getLog().dump(getClass(), Info, ex, null);
451
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178 // ignore the exception otherwise
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179 }
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diff changeset
180 }
445
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181 }
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182 return Boolean.TRUE;
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183 }
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184
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185 private List<Nodeid> getPhaseRoots(HgPhase phase) {
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186 switch (phase) {
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187 case Draft : return draftPhaseRoots;
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188 case Secret : return secretPhaseRoots;
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189 }
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190 return Collections.emptyList();
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191 }
449
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diff changeset
192
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diff changeset
193
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6526d8adbc0f Explicit HgRuntimeException to facilitate easy switch from runtime to checked exceptions
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194 private RevisionDescendants[] getPhaseDescendants(HgPhase phase) throws HgRuntimeException {
447
056f724bdc21 Cache earliest phase root revision not to evaluate all the time
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195 int ordinal = phase.ordinal();
449
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diff changeset
196 if (phaseDescendants[ordinal] == null) {
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197 phaseDescendants[ordinal] = buildPhaseDescendants(phase);
447
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198 }
449
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diff changeset
199 return phaseDescendants[ordinal];
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200 }
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diff changeset
201
628
6526d8adbc0f Explicit HgRuntimeException to facilitate easy switch from runtime to checked exceptions
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diff changeset
202 private RevisionDescendants[] buildPhaseDescendants(HgPhase phase) throws HgRuntimeException {
449
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diff changeset
203 int[] roots = toIndexes(getPhaseRoots(phase));
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diff changeset
204 RevisionDescendants[] rv = new RevisionDescendants[roots.length];
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diff changeset
205 for (int i = 0; i < roots.length; i++) {
493
ba36f66c32b4 Refactor to keep knowledge about repository control files and their location in respect to .hg/ in a single place (facilitate future adoption of shared repositories)
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diff changeset
206 rv[i] = new RevisionDescendants(getRepo(), roots[i]);
449
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diff changeset
207 rv[i].build();
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diff changeset
208 }
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diff changeset
209 return rv;
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diff changeset
210 }
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diff changeset
211
628
6526d8adbc0f Explicit HgRuntimeException to facilitate easy switch from runtime to checked exceptions
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diff changeset
212 private int[] toIndexes(List<Nodeid> roots) throws HgRuntimeException {
449
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diff changeset
213 int[] rv = new int[roots.size()];
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diff changeset
214 for (int i = 0; i < rv.length; i++) {
493
ba36f66c32b4 Refactor to keep knowledge about repository control files and their location in respect to .hg/ in a single place (facilitate future adoption of shared repositories)
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diff changeset
215 rv[i] = getRepo().getChangelog().getRevisionIndex(roots.get(i));
449
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diff changeset
216 }
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diff changeset
217 return rv;
447
056f724bdc21 Cache earliest phase root revision not to evaluate all the time
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diff changeset
218 }
445
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219 }