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annotate src/org/tmatesoft/hg/core/HgIncomingCommand.java @ 192:e5407b5a586a

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Incoming and Outgoing commands are alive
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 15 Apr 2011 03:17:03 +0200
parents cd3371670f0b
children 344e8d7e4d6e
rev   line source
181
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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.io.IOException;
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20 import java.util.ArrayList;
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21 import java.util.LinkedHashSet;
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22 import java.util.LinkedList;
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23 import java.util.List;
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24
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25 import org.tmatesoft.hg.internal.RepositoryComparator;
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26 import org.tmatesoft.hg.internal.RepositoryComparator.BranchChain;
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27 import org.tmatesoft.hg.repo.HgBundle;
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28 import org.tmatesoft.hg.repo.HgChangelog;
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29 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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30 import org.tmatesoft.hg.repo.HgRemoteRepository;
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31 import org.tmatesoft.hg.repo.HgRepository;
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32 import org.tmatesoft.hg.util.CancelledException;
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33
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34 /**
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35 * Command to find out changes available in a remote repository, missing locally.
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36 *
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37 * @author Artem Tikhomirov
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38 * @author TMate Software Ltd.
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39 */
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40 public class HgIncomingCommand {
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41
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42 private final HgRepository localRepo;
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43 private HgRemoteRepository remoteRepo;
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44 private boolean includeSubrepo;
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45 private RepositoryComparator comparator;
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46 private List<BranchChain> missingBranches;
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47 private HgChangelog.ParentWalker parentHelper;
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48
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49 public HgIncomingCommand(HgRepository hgRepo) {
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50 localRepo = hgRepo;
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51 }
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52
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53 public HgIncomingCommand against(HgRemoteRepository hgRemote) {
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54 remoteRepo = hgRemote;
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55 comparator = null;
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56 missingBranches = null;
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57 return this;
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58 }
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59
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60 /**
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61 * PLACEHOLDER, NOT IMPLEMENTED YET.
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62 *
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63 * Select specific branch to pull
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64 * @return <code>this</code> for convenience
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65 */
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66 public HgIncomingCommand branch(String branch) {
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67 throw HgRepository.notImplemented();
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68 }
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69
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70 /**
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71 * PLACEHOLDER, NOT IMPLEMENTED YET.
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72 *
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73 * Whether to include sub-repositories when collecting changes, default is <code>true</code> XXX or false?
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74 * @return <code>this</code> for convenience
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75 */
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76 public HgIncomingCommand subrepo(boolean include) {
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77 includeSubrepo = include;
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78 throw HgRepository.notImplemented();
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79 }
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81 /**
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82 * Lightweight check for incoming changes, gives only list of revisions to pull.
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83 *
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84 * @param context anything hg4j can use to get progress and/or cancel support
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85 * @return list of nodes present at remote and missing locally
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86 * @throws HgException
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87 * @throws CancelledException
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88 */
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89 public List<Nodeid> executeLite(Object context) throws HgException, CancelledException {
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90 LinkedHashSet<Nodeid> result = new LinkedHashSet<Nodeid>();
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91 RepositoryComparator repoCompare = getComparator(context);
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92 for (BranchChain bc : getMissingBranches(context)) {
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93 List<Nodeid> missing = repoCompare.visitBranches(bc);
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94 assert bc.branchRoot.equals(missing.get(0));
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95 missing.remove(0);
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96 result.addAll(missing);
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97 }
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98 ArrayList<Nodeid> rv = new ArrayList<Nodeid>(result);
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99 return rv;
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100 }
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102 /**
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103 * Full information about incoming changes
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104 *
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105 * @throws HgException
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106 * @throws CancelledException
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107 */
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108 public void executeFull(final HgLogCommand.Handler handler) throws HgException, CancelledException {
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109 if (handler == null) {
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110 throw new IllegalArgumentException("Delegate can't be null");
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111 }
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112 final List<Nodeid> common = getCommon(handler);
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113 HgBundle changegroup = remoteRepo.getChanges(new LinkedList<Nodeid>(common));
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114 try {
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115 changegroup.changes(localRepo, new HgChangelog.Inspector() {
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116 private int localIndex;
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117 private final HgChangelog.ParentWalker parentHelper;
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118 private final ChangesetTransformer transformer;
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119 private final HgChangelog changelog;
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120
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121 {
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122 transformer = new ChangesetTransformer(localRepo, handler);
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123 parentHelper = getParentHelper();
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124 changelog = localRepo.getChangelog();
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125 }
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126
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127 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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128 if (parentHelper.knownNode(nodeid)) {
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129 if (!common.contains(nodeid)) {
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130 throw new HgBadStateException("Bundle shall not report known nodes other than roots we've supplied");
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131 }
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132 localIndex = changelog.getLocalRevision(nodeid);
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133 return;
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134 }
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135 transformer.next(++localIndex, nodeid, cset);
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136 }
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137 });
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138 } catch (IOException ex) {
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139 throw new HgException(ex);
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140 }
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141 }
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142
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143 private RepositoryComparator getComparator(Object context) throws HgException, CancelledException {
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144 if (remoteRepo == null) {
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145 throw new HgBadArgumentException("Shall specify remote repository to compare against", null);
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146 }
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147 if (comparator == null) {
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148 comparator = new RepositoryComparator(getParentHelper(), remoteRepo);
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149 comparator.compare(context);
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150 }
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151 return comparator;
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152 }
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153
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154 private HgChangelog.ParentWalker getParentHelper() {
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155 if (parentHelper == null) {
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156 parentHelper = localRepo.getChangelog().new ParentWalker();
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157 parentHelper.init();
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158 }
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159 return parentHelper;
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160 }
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161
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162 private List<BranchChain> getMissingBranches(Object context) throws HgException, CancelledException {
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163 if (missingBranches == null) {
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164 missingBranches = getComparator(context).calculateMissingBranches();
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165 }
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166 return missingBranches;
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167 }
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168
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169 private List<Nodeid> getCommon(Object context) throws HgException, CancelledException {
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170 final LinkedHashSet<Nodeid> common = new LinkedHashSet<Nodeid>();
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171 // XXX common can be obtained from repoCompare, but at the moment it would almost duplicate work of calculateMissingBranches
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172 // once I refactor latter, common shall be taken from repoCompare.
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173 for (BranchChain bc : getMissingBranches(context)) {
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174 common.add(bc.branchRoot);
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175 }
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176 return new LinkedList<Nodeid>(common);
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177 }
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178 }