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annotate src/org/tmatesoft/hg/internal/RevisionSet.java @ 652:cd77bf51b562

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Push: tests. Commit respects phases.new-commit setting. Fix outgoing when changes are not children of common (Issue 47)
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 02 Jul 2013 23:21:16 +0200
parents 6e98d34eaca8
children 629a7370554c
rev   line source
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1 /*
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2 * Copyright (c) 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.HgRepository.NO_REVISION;
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20
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21 import java.util.ArrayList;
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22 import java.util.Collection;
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23 import java.util.Collections;
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24 import java.util.HashSet;
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25 import java.util.Iterator;
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26 import java.util.List;
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27 import java.util.Set;
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28
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29 import org.tmatesoft.hg.core.Nodeid;
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30 import org.tmatesoft.hg.repo.HgChangelog;
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31 import org.tmatesoft.hg.repo.HgParentChildMap;
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32 import org.tmatesoft.hg.repo.HgRepository;
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33
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34 /**
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35 * Unmodifiable collection of revisions with handy set operations
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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 final class RevisionSet implements Iterable<Nodeid> {
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41
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42 private final Set<Nodeid> elements;
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43
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44 public RevisionSet(Collection<Nodeid> revisions) {
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45 this(revisions == null ? new HashSet<Nodeid>() : new HashSet<Nodeid>(revisions));
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46 }
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47
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48 private RevisionSet(HashSet<Nodeid> revisions) {
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49 if (revisions.isEmpty()) {
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50 elements = Collections.<Nodeid>emptySet();
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51 } else {
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52 elements = revisions;
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53 }
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54 }
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55
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56 /**
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57 * elements of the set with no parents or parents not from the same set
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58 */
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59 public RevisionSet roots(HgParentChildMap<HgChangelog> ph) {
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60 HashSet<Nodeid> copy = new HashSet<Nodeid>(elements);
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61 for (Nodeid n : elements) {
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62 assert ph.knownNode(n);
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63 Nodeid p1 = ph.firstParent(n);
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64 if (p1 != null && elements.contains(p1)) {
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65 copy.remove(n);
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66 continue;
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67 }
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68 Nodeid p2 = ph.secondParent(n);
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69 if (p2 != null && elements.contains(p2)) {
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70 copy.remove(n);
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71 continue;
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72 }
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73 }
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74 return copy.size() == elements.size() ? this : new RevisionSet(copy);
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75 }
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76
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77 /**
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78 * Same as {@link #roots(HgParentChildMap)}, but doesn't require a parent-child map
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79 */
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80 public RevisionSet roots(HgRepository repo) {
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81 // TODO introduce parent access interface, use it here, provide implementations
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82 // that delegate to HgParentChildMap or HgRepository
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83 HashSet<Nodeid> copy = new HashSet<Nodeid>(elements);
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84 final HgChangelog clog = repo.getChangelog();
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85 byte[] parent1 = new byte[Nodeid.SIZE], parent2 = new byte[Nodeid.SIZE];
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86 int[] parentRevs = new int[2];
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87 for (Nodeid n : elements) {
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88 assert clog.isKnown(n);
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89 clog.parents(clog.getRevisionIndex(n), parentRevs, parent1, parent2);
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90 if (parentRevs[0] != NO_REVISION && elements.contains(new Nodeid(parent1, false))) {
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91 copy.remove(n);
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92 continue;
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93 }
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94 if (parentRevs[1] != NO_REVISION && elements.contains(new Nodeid(parent2, false))) {
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95 copy.remove(n);
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96 continue;
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97 }
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98 }
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99 return copy.size() == elements.size() ? this : new RevisionSet(copy);
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100 }
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101
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102 /**
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103 * elements of the set that has no children in this set
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104 */
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105 public RevisionSet heads(HgParentChildMap<HgChangelog> ph) {
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106 HashSet<Nodeid> copy = new HashSet<Nodeid>(elements);
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107 // can't do copy.removeAll(ph.childrenOf(asList())); as actual heads are indeed children of some other node
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108 for (Nodeid n : elements) {
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109 assert ph.knownNode(n);
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110 Nodeid p1 = ph.firstParent(n);
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111 Nodeid p2 = ph.secondParent(n);
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112 if (p1 != null && elements.contains(p1)) {
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113 copy.remove(p1);
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114 }
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115 if (p2 != null && elements.contains(p2)) {
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116 copy.remove(p2);
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117 }
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118 }
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119 return copy.size() == elements.size() ? this : new RevisionSet(copy);
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120 }
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121
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122 /**
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123 * Any ancestor of an element from the supplied child set found in this one.
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124 * Elements of the supplied child set are not part of return value.
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125 */
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126 public RevisionSet ancestors(RevisionSet children, HgParentChildMap<HgChangelog> parentHelper) {
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127 if (isEmpty()) {
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128 return this;
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129 }
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130 if (children.isEmpty()) {
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131 return children;
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132 }
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133 RevisionSet chRoots = children.roots(parentHelper);
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134 HashSet<Nodeid> ancestors = new HashSet<Nodeid>();
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135 Set<Nodeid> childrenToCheck = chRoots.elements;
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136 while (!childrenToCheck.isEmpty()) {
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137 HashSet<Nodeid> nextRound = new HashSet<Nodeid>();
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138 for (Nodeid n : childrenToCheck) {
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139 Nodeid p1 = parentHelper.firstParent(n);
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140 Nodeid p2 = parentHelper.secondParent(n);
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141 if (p1 != null && elements.contains(p1)) {
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142 nextRound.add(p1);
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143 }
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144 if (p2 != null && elements.contains(p2)) {
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145 nextRound.add(p2);
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146 }
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147 }
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148 ancestors.addAll(nextRound);
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149 childrenToCheck = nextRound;
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150 }
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151 return new RevisionSet(ancestors);
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152 }
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153
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154 /**
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155 * Revisions that are both direct and indirect children of elements of this revision set
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156 * as known in supplied parent-child map
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157 */
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158 public RevisionSet children(HgParentChildMap<HgChangelog> parentHelper) {
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159 if (isEmpty()) {
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160 return this;
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161 }
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162 List<Nodeid> children = parentHelper.childrenOf(elements);
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163 return new RevisionSet(new HashSet<Nodeid>(children));
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164 }
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165
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166 public RevisionSet intersect(RevisionSet other) {
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167 if (isEmpty()) {
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168 return this;
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169 }
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170 if (other.isEmpty()) {
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171 return other;
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172 }
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173 HashSet<Nodeid> copy = new HashSet<Nodeid>(elements);
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174 copy.retainAll(other.elements);
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175 return copy.size() == elements.size() ? this : new RevisionSet(copy);
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176 }
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177
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178 public RevisionSet subtract(RevisionSet other) {
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179 if (isEmpty() || other.isEmpty()) {
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180 return this;
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181 }
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182 HashSet<Nodeid> copy = new HashSet<Nodeid>(elements);
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183 copy.removeAll(other.elements);
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184 return copy.size() == elements.size() ? this : new RevisionSet(copy);
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185 }
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186
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187 public RevisionSet union(RevisionSet other) {
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188 if (isEmpty()) {
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189 return other;
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190 }
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191 if (other.isEmpty()) {
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192 return this;
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193 }
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194 HashSet<Nodeid> copy = new HashSet<Nodeid>(elements);
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195 copy.addAll(other.elements);
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196 return copy.size() == elements.size() ? this : new RevisionSet(copy);
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197 }
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198
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199 /**
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200 * A ^ B := (A\B).union(B\A)
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201 * A ^ B := A.union(B) \ A.intersect(B)
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202 */
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203 public RevisionSet symmetricDifference(RevisionSet other) {
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204 if (isEmpty()) {
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205 return this;
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206 }
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207 if (other.isEmpty()) {
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208 return other;
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209 }
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210 HashSet<Nodeid> copyA = new HashSet<Nodeid>(elements);
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211 HashSet<Nodeid> copyB = new HashSet<Nodeid>(other.elements);
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212 copyA.removeAll(other.elements);
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213 copyB.removeAll(elements);
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214 copyA.addAll(copyB);
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215 return new RevisionSet(copyA);
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216 }
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217
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218 public boolean isEmpty() {
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219 return elements.isEmpty();
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220 }
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221
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222 public int size() {
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223 return elements.size();
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224 }
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225
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226 public List<Nodeid> asList() {
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227 return new ArrayList<Nodeid>(elements);
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228 }
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229
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230 public Iterator<Nodeid> iterator() {
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231 return elements.iterator();
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232 }
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233
648
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234 @Override
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235 public String toString() {
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236 StringBuilder sb = new StringBuilder();
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237 sb.append('<');
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238 if (!isEmpty()) {
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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239 sb.append(elements.size());
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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240 sb.append(':');
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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241 }
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parents:
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242 for (Nodeid n : elements) {
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243 sb.append(n.shortNotation());
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244 sb.append(',');
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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245 }
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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246 if (sb.length() > 1) {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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247 sb.setCharAt(sb.length() - 1, '>');
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248 } else {
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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249 sb.append('>');
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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250 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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251 return sb.toString();
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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252 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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253
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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254 @Override
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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255 public boolean equals(Object obj) {
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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256 if (false == obj instanceof RevisionSet) {
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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257 return false;
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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258 }
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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259 return elements.equals(((RevisionSet) obj).elements);
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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260 }
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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261
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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262 @Override
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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263 public int hashCode() {
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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264 return elements.hashCode();
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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265 }
690e71d29bf6 Introduced RevisionSet to ease update of phase roots on push
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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266 }