Mercurial > hg4j

annotate src/org/tmatesoft/hg/core/HgIncomingCommand.java @ 338:3cfa4d908fc9

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Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close())
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 15 Nov 2011 04:47:03 +0100
parents d68dcb3b5f49
children 189dc6dc1c3e
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 java.util.ArrayList;
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20 import java.util.HashSet;
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21 import java.util.Iterator;
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22 import java.util.LinkedHashSet;
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23 import java.util.LinkedList;
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24 import java.util.List;
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25 import java.util.Set;
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26 import java.util.TreeSet;
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27
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28 import org.tmatesoft.hg.internal.RepositoryComparator;
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29 import org.tmatesoft.hg.internal.RepositoryComparator.BranchChain;
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30 import org.tmatesoft.hg.repo.HgBundle;
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31 import org.tmatesoft.hg.repo.HgChangelog;
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32 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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33 import org.tmatesoft.hg.repo.HgRemoteRepository;
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34 import org.tmatesoft.hg.repo.HgRepository;
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35 import org.tmatesoft.hg.util.CancelledException;
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36 import org.tmatesoft.hg.util.ProgressSupport;
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38 /**
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39 * Command to find out changes available in a remote repository, missing locally.
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40 *
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41 * @author Artem Tikhomirov
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42 * @author TMate Software Ltd.
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43 */
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44 public class HgIncomingCommand extends HgAbstractCommand<HgIncomingCommand> {
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45
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46 private final HgRepository localRepo;
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47 private HgRemoteRepository remoteRepo;
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48 @SuppressWarnings("unused")
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49 private boolean includeSubrepo;
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50 private RepositoryComparator comparator;
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51 private List<BranchChain> missingBranches;
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52 private HgChangelog.ParentWalker parentHelper;
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53 private Set<String> branches;
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54
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55 public HgIncomingCommand(HgRepository hgRepo) {
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56 localRepo = hgRepo;
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57 }
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58
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59 public HgIncomingCommand against(HgRemoteRepository hgRemote) {
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60 remoteRepo = hgRemote;
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61 comparator = null;
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62 missingBranches = null;
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63 return this;
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64 }
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66 /**
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67 * Select specific branch to push.
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68 * Multiple branch specification possible (changeset from any of these would be included in result).
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69 * Note, {@link #executeLite(Object)} does not respect this setting.
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70 *
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71 * @param branch - branch name, case-sensitive, non-null.
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72 * @return <code>this</code> for convenience
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73 * @throws IllegalArgumentException when branch argument is null
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74 */
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75 public HgIncomingCommand branch(String branch) {
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76 if (branch == null) {
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77 throw new IllegalArgumentException();
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78 }
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79 if (branches == null) {
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80 branches = new TreeSet<String>();
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81 }
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82 branches.add(branch);
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83 return this;
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84 }
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86 /**
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87 * PLACEHOLDER, NOT IMPLEMENTED YET.
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88 *
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89 * Whether to include sub-repositories when collecting changes, default is <code>true</code> XXX or false?
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90 * @return <code>this</code> for convenience
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91 */
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92 public HgIncomingCommand subrepo(boolean include) {
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93 includeSubrepo = include;
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94 throw HgRepository.notImplemented();
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95 }
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97 /**
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98 * Lightweight check for incoming changes, gives only list of revisions to pull.
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99 * Reported changes are from any branch (limits set by {@link #branch(String)} are not taken into account.
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100 *
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101 * @return list of nodes present at remote and missing locally
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102 * @throws HgRemoteConnectionException when failed to communicate with remote repository
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103 * @throws CancelledException
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104 */
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105 public List<Nodeid> executeLite() throws HgRemoteConnectionException, CancelledException {
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106 LinkedHashSet<Nodeid> result = new LinkedHashSet<Nodeid>();
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107 RepositoryComparator repoCompare = getComparator();
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108 for (BranchChain bc : getMissingBranches()) {
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109 List<Nodeid> missing = repoCompare.visitBranches(bc);
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110 HashSet<Nodeid> common = new HashSet<Nodeid>(); // ordering is irrelevant
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111 repoCompare.collectKnownRoots(bc, common);
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112 // missing could only start with common elements. Once non-common, rest is just distinct branch revision trails.
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113 for (Iterator<Nodeid> it = missing.iterator(); it.hasNext() && common.contains(it.next()); it.remove()) ;
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114 result.addAll(missing);
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115 }
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116 ArrayList<Nodeid> rv = new ArrayList<Nodeid>(result);
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117 return rv;
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118 }
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119
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120 /**
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121 * Full information about incoming changes
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122 *
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123 * @throws HgRemoteConnectionException when failed to communicate with remote repository
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124 * @throws HgInvalidFileException to indicate failure working with locally downloaded changes in a bundle file
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125 * @throws HgCallbackTargetException to re-throw exception from the handler
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126 * @throws CancelledException
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127 */
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128 public void executeFull(final HgChangesetHandler handler) throws HgRemoteConnectionException, HgInvalidFileException, HgCallbackTargetException, CancelledException {
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129 if (handler == null) {
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130 throw new IllegalArgumentException("Delegate can't be null");
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131 }
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132 final List<Nodeid> common = getCommon();
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133 HgBundle changegroup = remoteRepo.getChanges(common);
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134 final ProgressSupport ps = getProgressSupport(handler);
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135 try {
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136 final ChangesetTransformer transformer = new ChangesetTransformer(localRepo, handler, getParentHelper(), ps, getCancelSupport(handler, true));
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137 transformer.limitBranches(branches);
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138 changegroup.changes(localRepo, new HgChangelog.Inspector() {
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139 private int localIndex;
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140 private final HgChangelog.ParentWalker parentHelper;
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141
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142 {
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143 parentHelper = getParentHelper();
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144 // new revisions, if any, would be added after all existing, and would get numbered started with last+1
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145 localIndex = localRepo.getChangelog().getRevisionCount();
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146 }
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147
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148 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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149 if (parentHelper.knownNode(nodeid)) {
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150 if (!common.contains(nodeid)) {
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151 throw new HgBadStateException("Bundle shall not report known nodes other than roots we've supplied");
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152 }
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153 return;
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154 }
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155 transformer.next(localIndex++, nodeid, cset);
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156 }
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157 });
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158 transformer.checkFailure();
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159 } finally {
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160 ps.done();
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161 }
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162 }
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163
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164 private RepositoryComparator getComparator() throws CancelledException {
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165 if (remoteRepo == null) {
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166 throw new IllegalArgumentException("Shall specify remote repository to compare against", null);
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167 }
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168 if (comparator == null) {
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169 comparator = new RepositoryComparator(getParentHelper(), remoteRepo);
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170 // comparator.compare(context); // XXX meanwhile we use distinct path to calculate common
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171 }
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172 return comparator;
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173 }
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174
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175 private HgChangelog.ParentWalker getParentHelper() {
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176 if (parentHelper == null) {
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177 parentHelper = localRepo.getChangelog().new ParentWalker();
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178 parentHelper.init();
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179 }
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180 return parentHelper;
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181 }
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182
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183 private List<BranchChain> getMissingBranches() throws HgRemoteConnectionException, CancelledException {
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184 if (missingBranches == null) {
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185 missingBranches = getComparator().calculateMissingBranches();
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186 }
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187 return missingBranches;
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188 }
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189
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190 private List<Nodeid> getCommon() throws HgRemoteConnectionException, CancelledException {
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191 // return getComparator(context).getCommon();
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192 final LinkedHashSet<Nodeid> common = new LinkedHashSet<Nodeid>();
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193 // XXX common can be obtained from repoCompare, but at the moment it would almost duplicate work of calculateMissingBranches
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194 // once I refactor latter, common shall be taken from repoCompare.
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195 RepositoryComparator repoCompare = getComparator();
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196 for (BranchChain bc : getMissingBranches()) {
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197 repoCompare.collectKnownRoots(bc, common);
192
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198 }
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199 return new LinkedList<Nodeid>(common);
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200 }
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201 }