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annotate cmdline/org/tmatesoft/hg/console/Incoming.java @ 176:a8df7162ec75

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Extracting complete branch using remote between call to detect incoming changes is done. Arguments reorderd in remote repo to better match Hg server ideology, not my mental convenience
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sat, 02 Apr 2011 03:01:14 +0200
parents b1de83ffa7f8
children e10225daface
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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a3a2e5deb320 Updated contact address to support@hg4j.com
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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.console;
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18
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19 import static org.tmatesoft.hg.core.Nodeid.NULL;
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21 import java.io.File;
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22 import java.net.URL;
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23 import java.util.Arrays;
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24 import java.util.Collections;
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25 import java.util.Comparator;
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26 import java.util.HashSet;
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27 import java.util.Iterator;
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28 import java.util.LinkedHashMap;
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29 import java.util.LinkedList;
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30 import java.util.List;
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31 import java.util.Map.Entry;
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33 import org.tmatesoft.hg.core.HgBadStateException;
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34 import org.tmatesoft.hg.core.HgException;
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35 import org.tmatesoft.hg.core.Nodeid;
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36 import org.tmatesoft.hg.internal.ConfigFile;
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37 import org.tmatesoft.hg.internal.Internals;
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38 import org.tmatesoft.hg.repo.HgChangelog;
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39 import org.tmatesoft.hg.repo.HgLookup;
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40 import org.tmatesoft.hg.repo.HgRemoteRepository;
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41 import org.tmatesoft.hg.repo.HgRemoteRepository.RemoteBranch;
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42 import org.tmatesoft.hg.repo.HgRepository;
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43
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45 /**
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46 * WORK IN PROGRESS, DO NOT USE
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47 * hg incoming counterpart
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48 *
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49 * @author Artem Tikhomirov
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50 * @author TMate Software Ltd.
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51 */
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52 public class Incoming {
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53
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54 public static void main(String[] args) throws Exception {
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55 if (Boolean.FALSE.booleanValue()) {
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56 new SequenceConstructor().test();
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57 return;
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58 }
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59 Options cmdLineOpts = Options.parse(args);
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60 HgRepository hgRepo = cmdLineOpts.findRepository();
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61 if (hgRepo.isInvalid()) {
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62 System.err.printf("Can't find repository in: %s\n", hgRepo.getLocation());
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63 return;
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64 }
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65 String key = "svnkit";
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66 ConfigFile cfg = new Internals().newConfigFile();
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67 cfg.addLocation(new File(System.getProperty("user.home"), ".hgrc"));
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68 String server = cfg.getSection("paths").get(key);
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69 if (server == null) {
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70 throw new HgException(String.format("Can't find server %s specification in the config", key));
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71 }
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72 HgRemoteRepository hgRemote = new HgLookup().detect(new URL(server));
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73 //
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74 // in fact, all we need from changelog is set of all nodeids. However, since ParentWalker reuses same Nodeids, it's not too expensive
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75 // to reuse it here, XXX although later this may need to be refactored
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76 final HgChangelog.ParentWalker pw = hgRepo.getChangelog().new ParentWalker();
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77 pw.init();
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78 //
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79 List<RemoteBranch> missingBranches = calculateMissingBranches(hgRepo, hgRemote);
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80 LinkedList<Nodeid> missing = new LinkedList<Nodeid>();
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81 for (RemoteBranch rb : missingBranches) {
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82 List<Nodeid> completeBranch = completeBranch(hgRemote, rb);
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83 // FIXME ensure topologically sorted result
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84 missing.addAll(completeBranch);
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85 }
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86 // Collections.reverse(missing); // useful to test output, from newer to older
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87 for (Nodeid n : missing) {
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88 if (pw.knownNode(n)) {
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89 System.out.println("Erroneous to fetch:" + n);
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90 } else {
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91 System.out.println(n);
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92 }
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93 }
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94 }
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96 private static List<RemoteBranch> calculateMissingBranches(HgRepository hgRepo, HgRemoteRepository hgRemote) {
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97 // FIXME implement
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98 //
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99 // sample 0..52
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100 Nodeid head = Nodeid.fromAscii("30bd389788464287cee22ccff54c330a4b715de5");
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101 Nodeid root = Nodeid.fromAscii("dbd663faec1f0175619cf7668bddc6350548b8d6");
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102 Nodeid p1 = NULL, p2 = NULL;
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103 RemoteBranch fake = new RemoteBranch(head, root, p1, p2);
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104 return Collections.singletonList(fake);
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105 }
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106
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107 // RemoteBranch not necessarily a 'true' remote branch. I use this structure to keep root, head, and root's parents, any
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108 // of them can be known locally, parent might be only one (when I split 'true' RemoteBranch in between because of locally known node
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109 private static List<Nodeid> completeBranch(HgRemoteRepository hgRemote, RemoteBranch rb) throws HgException {
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110 class DataEntry {
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111 public final Nodeid queryHead;
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112 public final int headIndex;
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113 public List<Nodeid> entries;
31
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114
176
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115 public DataEntry(Nodeid head, int index, List<Nodeid> data) {
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116 queryHead = head;
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117 headIndex = index;
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118 entries = data;
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119 }
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120 };
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121
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122 List<Nodeid> initial = hgRemote.between(rb.head, rb.root);
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123 Nodeid[] result = new Nodeid[1 << initial.size()];
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124 result[0] = rb.head;
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125 int rootIndex = -1; // index in the result, where to place branche's root.
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126 LinkedList<DataEntry> datas = new LinkedList<DataEntry>();
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127 // DataEntry in datas has entries list filled with 'between' data, whereas
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128 // DataEntry in toQuery keeps only nodeid and its index, with entries to be initialized before
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129 // moving to datas.
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130 LinkedList<DataEntry> toQuery = new LinkedList<DataEntry>();
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131 //
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132 datas.add(new DataEntry(rb.head, 0, initial));
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133 int totalQueries = 1;
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134 HashSet<Nodeid> queried = new HashSet<Nodeid>();
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135 while(!datas.isEmpty()) {
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136 do {
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137 DataEntry de = datas.removeFirst();
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138 // populate result with discovered elements between de.qiueryRoot and branch's head
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139 for (int i = 1, j = 0; j < de.entries.size(); i = i << 1, j++) {
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140 int idx = de.headIndex + i;
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141 result[idx] = de.entries.get(j);
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142 }
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143 // form next query entries from new unknown elements
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144 if (de.entries.size() > 1) {
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145 /* when entries has only one element, it means de.queryRoot was at head-2 position, and thus
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146 * no new information can be obtained. E.g. when it's 2, it might be case of [0..4] query with
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147 * [1,2] result, and we need one more query to get element 3.
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148 */
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149 for (int i =1, j = 0; j < de.entries.size(); i = i<<1, j++) {
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150 int idx = de.headIndex + i;
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151 Nodeid x = de.entries.get(j);
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152 if (!queried.contains(x) && (rootIndex == -1 || rootIndex - de.headIndex > 1)) {
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153 /*queries for elements right before head is senseless, but unless we know head's index, do it anyway*/
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154 toQuery.add(new DataEntry(x, idx, null));
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155 }
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156 }
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157 }
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158 } while (!datas.isEmpty());
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159 if (!toQuery.isEmpty()) {
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160 totalQueries++;
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161 }
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162 for (DataEntry de : toQuery) {
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163 if (!queried.contains(de.queryHead)) {
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164 queried.add(de.queryHead);
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165 List<Nodeid> between = hgRemote.between(de.queryHead, rb.root);
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166 if (rootIndex == -1 && between.size() == 1) {
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167 // returned sequence of length 1 means we used element from [head-2] as root
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168 int numberOfElementsExcludingRootAndHead = de.headIndex + 1;
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169 rootIndex = numberOfElementsExcludingRootAndHead + 1;
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170 System.out.printf("On query %d found out exact number of missing elements: %d\n", totalQueries, numberOfElementsExcludingRootAndHead);
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171 }
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172 de.entries = between;
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173 datas.add(de); // queue up to record result and construct further requests
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174 }
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175 }
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176 toQuery.clear();
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177 }
176
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178 if (rootIndex == -1) {
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179 throw new HgBadStateException("Shall not happen, provided between output is correct"); // FIXME
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180 }
176
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181 result[rootIndex] = rb.root;
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182 boolean resultOk = true;
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183 LinkedList<Nodeid> fromRootToHead = new LinkedList<Nodeid>();
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184 for (int i = 0; i <= rootIndex; i++) {
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185 Nodeid n = result[i];
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186 if (n == null) {
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187 System.out.printf("ERROR: element %d wasn't found\n",i);
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188 resultOk = false;
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189 }
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190 fromRootToHead.addFirst(n); // reverse order
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191 }
176
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192 if (!resultOk) {
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193 throw new HgBadStateException("See console for details"); // FIXME
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194 }
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195 return fromRootToHead;
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196 }
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197
173
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198 private static class SequenceConstructor {
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199
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200 private int[] between(int root, int head) {
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201 if (head <= (root+1)) {
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202 return new int[0];
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203 }
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204 System.out.printf("[%d, %d]\t\t", root, head);
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205 int size = 1 + (int) Math.floor(Math.log(head-root - 1) / Math.log(2));
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206 int[] rv = new int[size];
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207 for (int v = 1, i = 0; i < rv.length; i++) {
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208 rv[i] = root + v;
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209 v = v << 1;
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210 }
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211 System.out.println(Arrays.toString(rv));
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212 return rv;
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213 }
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214
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215 public void test() {
176
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216 int root = 0, head = 126;
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217 int[] data = between(root, head); // max number of elements to recover is 2**data.length-1, when head is exactly
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218 // 2**data.length element of the branch.
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219 // In such case, total number of elements in the branch (including head and root, would be 2**data.length+1
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220 int[] finalSequence = new int[1 + (1 << data.length >>> 5)]; // div 32 - total bits to integers, +1 for possible modulus
173
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221 int exactNumberOfElements = -1; // exact number of meaningful bits in finalSequence
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222 LinkedHashMap<Integer, int[]> datas = new LinkedHashMap<Integer, int[]>();
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223 datas.put(root, data);
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224 int totalQueries = 1;
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225 HashSet<Integer> queried = new HashSet<Integer>();
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226 int[] checkSequence = null;
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227 while(!datas.isEmpty()) {
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228 LinkedList<int[]> toQuery = new LinkedList<int[]>();
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229 do {
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230 Iterator<Entry<Integer, int[]>> it = datas.entrySet().iterator();
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231 Entry<Integer, int[]> next = it.next();
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232 int r = next.getKey();
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233 data = next.getValue();
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234 it.remove();
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235 populate(r, head, data, finalSequence);
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236 if (checkSequence != null) {
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237 boolean match = true;
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238 // System.out.println("Try to match:");
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239 for (int i = 0; i < checkSequence.length; i++) {
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240 // System.out.println(i);
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241 // System.out.println("control:" + toBinaryString(checkSequence[i], ' '));
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242 // System.out.println("present:" + toBinaryString(finalSequence[i], ' '));
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243 if (checkSequence[i] != finalSequence[i]) {
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244 match = false;
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245 } else {
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246 match &= true;
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247 }
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248 }
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249 System.out.println(match ? "Match, on query:" + totalQueries : "Didn't match");
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250 }
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251 if (data.length > 1) {
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252 /*queries for elements next to head is senseless, hence data.length check above and head-x below*/
173
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253 for (int x : data) {
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254 if (!queried.contains(x) && head - x > 1) {
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255 toQuery.add(new int[] {x, head});
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256 }
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257 }
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258 }
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259 } while (!datas.isEmpty()) ;
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260 if (!toQuery.isEmpty()) {
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261 System.out.println();
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262 totalQueries++;
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263 }
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264 Collections.sort(toQuery, new Comparator<int[]>() {
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265
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266 public int compare(int[] o1, int[] o2) {
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267 return o1[0] < o2[0] ? -1 : (o1[0] == o2[0] ? 0 : 1);
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268 }
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269 });
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270 for (int[] x : toQuery) {
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271 if (!queried.contains(x[0])) {
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272 queried.add(x[0]);
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273 data = between(x[0], x[1]);
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274 if (exactNumberOfElements == -1 && data.length == 1) {
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275 exactNumberOfElements = x[0] + 1;
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276 System.out.printf("On query %d found out exact number of missing elements: %d\n", totalQueries, exactNumberOfElements);
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277 // get a bit sequence of exactNumberOfElements, 0111..110
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278 // to 'and' it with finalSequence later
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279 int totalInts = (exactNumberOfElements + 2 /*heading and tailing zero bits*/) >>> 5;
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280 int trailingBits = (exactNumberOfElements + 2) & 0x1f;
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281 if (trailingBits != 0) {
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282 totalInts++;
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283 }
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284 checkSequence = new int[totalInts];
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285 Arrays.fill(checkSequence, 0xffffffff);
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286 checkSequence[0] &= 0x7FFFFFFF;
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287 if (trailingBits == 0) {
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288 checkSequence[totalInts-1] &= 0xFFFFFFFE;
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289 } else if (trailingBits == 1) {
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290 checkSequence[totalInts-1] = 0;
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291 } else {
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292 // trailingBits include heading and trailing zero bits
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293 int mask = 0x80000000 >> trailingBits-2; // with sign!
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294 checkSequence[totalInts - 1] &= mask;
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295 }
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296 for (int e : checkSequence) {
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297 System.out.print(toBinaryString(e, ' '));
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298 }
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299 System.out.println();
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300 }
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301 datas.put(x[0], data);
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302 }
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303 }
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304 }
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305
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306 System.out.println("Total queries:" + totalQueries);
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307 for (int x : finalSequence) {
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308 System.out.print(toBinaryString(x, ' '));
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309 }
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310 }
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311
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312 private void populate(int root, int head, int[] data, int[] finalSequence) {
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313 for (int i = 1, x = 0; root+i < head; i = i << 1, x++) {
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314 int value = data[x];
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315 int value_check = root+i;
174
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316 if (value != value_check) {
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317 throw new IllegalStateException();
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318 }
173
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319 int wordIx = (root + i) >>> 5;
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320 int bitIx = (root + i) & 0x1f;
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321 finalSequence[wordIx] |= 1 << (31-bitIx);
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322 }
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323 }
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324
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325 private static String toBinaryString(int x, char byteSeparator) {
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326 StringBuilder sb = new StringBuilder(4*8+4);
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327 sb.append(toBinaryString((byte) (x >>> 24)));
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328 sb.append(byteSeparator);
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329 sb.append(toBinaryString((byte) ((x & 0x00ff0000) >>> 16)));
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330 sb.append(byteSeparator);
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331 sb.append(toBinaryString((byte) ((x & 0x00ff00) >>> 8)));
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332 sb.append(byteSeparator);
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333 sb.append(toBinaryString((byte) (x & 0x00ff)));
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334 sb.append(byteSeparator);
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335 return sb.toString();
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336 }
4bf061a7c001 Test algorithm to build sequence of missing revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 171
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337
4bf061a7c001 Test algorithm to build sequence of missing revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 171
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338 private static String toBinaryString(byte b) {
4bf061a7c001 Test algorithm to build sequence of missing revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 171
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339 final String nibbles = "0000000100100011010001010110011110001001101010111100110111101111";
4bf061a7c001 Test algorithm to build sequence of missing revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 171
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340 assert nibbles.length() == 16*4;
4bf061a7c001 Test algorithm to build sequence of missing revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 171
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341 int x1 = (b >>> 4) & 0x0f, x2 = b & 0x0f;
4bf061a7c001 Test algorithm to build sequence of missing revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 171
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342 x1 *= 4; x2 *= 4; // 4 characters per nibble
4bf061a7c001 Test algorithm to build sequence of missing revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 171
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343 return nibbles.substring(x1, x1+4).concat(nibbles.substring(x2, x2+4));
4bf061a7c001 Test algorithm to build sequence of missing revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 171
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344 }
4bf061a7c001 Test algorithm to build sequence of missing revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 171
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345 }
31
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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346 }