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annotate src/org/tmatesoft/hg/core/HgStatusCommand.java @ 488:45b3b6ca046f

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Repository locking mechanism is alive
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 13 Aug 2012 19:07:59 +0200
parents d78cb5ca3053
children 2f9ed6bcefa2
rev   line source
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1 /*
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2 * Copyright (c) 2011-2012 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 static org.tmatesoft.hg.core.HgStatus.Kind.*;
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20 import static org.tmatesoft.hg.repo.HgInternals.wrongRevisionIndex;
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21 import static org.tmatesoft.hg.repo.HgRepository.*;
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22
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23 import java.io.IOException;
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24 import java.util.ConcurrentModificationException;
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25
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26 import org.tmatesoft.hg.internal.ChangelogHelper;
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27 import org.tmatesoft.hg.repo.HgRepository;
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28 import org.tmatesoft.hg.repo.HgRuntimeException;
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29 import org.tmatesoft.hg.repo.HgStatusCollector;
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30 import org.tmatesoft.hg.repo.HgStatusInspector;
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31 import org.tmatesoft.hg.repo.HgWorkingCopyStatusCollector;
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32 import org.tmatesoft.hg.util.CancelSupport;
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33 import org.tmatesoft.hg.util.CancelledException;
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4a948ec83980 core.Path to util.Path as it's not Hg repo dependant
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34 import org.tmatesoft.hg.util.Path;
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35 import org.tmatesoft.hg.util.Outcome;
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37 /**
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38 * Command to obtain file status information, 'hg status' counterpart.
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39 *
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40 * @author Artem Tikhomirov
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41 * @author TMate Software Ltd.
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42 */
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43 public class HgStatusCommand extends HgAbstractCommand<HgStatusCommand> {
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44 private final HgRepository repo;
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45
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46 private int startRevision = TIP;
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47 private int endRevision = WORKING_COPY;
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48 private Path.Matcher scope;
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50 private final Mediator mediator = new Mediator();
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51
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52 public HgStatusCommand(HgRepository hgRepo) {
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53 repo = hgRepo;
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54 defaults();
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55 }
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57 public HgStatusCommand defaults() {
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58 final Mediator m = mediator;
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59 m.needModified = m.needAdded = m.needRemoved = m.needUnknown = m.needMissing = true;
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60 m.needCopies = m.needClean = m.needIgnored = false;
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61 return this;
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62 }
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63 public HgStatusCommand all() {
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64 final Mediator m = mediator;
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65 m.needModified = m.needAdded = m.needRemoved = m.needUnknown = m.needMissing = true;
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66 m.needCopies = m.needClean = m.needIgnored = true;
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67 return this;
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68 }
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71 public HgStatusCommand modified(boolean include) {
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72 mediator.needModified = include;
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73 return this;
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74 }
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75 public HgStatusCommand added(boolean include) {
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76 mediator.needAdded = include;
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77 return this;
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78 }
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79 public HgStatusCommand removed(boolean include) {
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80 mediator.needRemoved = include;
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81 return this;
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82 }
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83 public HgStatusCommand deleted(boolean include) {
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84 mediator.needMissing = include;
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85 return this;
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86 }
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87 public HgStatusCommand unknown(boolean include) {
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88 mediator.needUnknown = include;
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89 return this;
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90 }
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91 public HgStatusCommand clean(boolean include) {
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92 mediator.needClean = include;
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93 return this;
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94 }
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95 public HgStatusCommand ignored(boolean include) {
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96 mediator.needIgnored = include;
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97 return this;
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98 }
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99
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100 /**
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101 * If set, either base:revision or base:workingdir
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102 * to unset, pass {@link HgRepository#TIP} or {@link HgRepository#BAD_REVISION}
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103 * @param changesetRevisionIndex - local index of a changeset to base status from
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104 * @return <code>this</code> for convenience
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105 * @throws IllegalArgumentException when revision is negative or {@link HgRepository#WORKING_COPY}
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106 */
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107 public HgStatusCommand base(int changesetRevisionIndex) {
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108 if (changesetRevisionIndex == WORKING_COPY || wrongRevisionIndex(changesetRevisionIndex)) {
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109 throw new IllegalArgumentException(String.valueOf(changesetRevisionIndex));
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110 }
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111 if (changesetRevisionIndex == BAD_REVISION) {
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112 changesetRevisionIndex = TIP;
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113 }
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114 startRevision = changesetRevisionIndex;
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115 return this;
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116 }
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117
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118 /**
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119 * Revision without base == --change
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120 * Pass {@link HgRepository#WORKING_COPY} or {@link HgRepository#BAD_REVISION} to reset
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121 * @param changesetRevisionIndex - non-negative changeset revision local index, or any of {@link HgRepository#BAD_REVISION}, {@link HgRepository#WORKING_COPY} or {@link HgRepository#TIP}
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122 * @return <code>this</code> for convenience
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123 * @throws IllegalArgumentException if revision index doesn't specify legitimate revision.
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124 */
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125 public HgStatusCommand revision(int changesetRevisionIndex) {
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126 if (changesetRevisionIndex == BAD_REVISION) {
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127 changesetRevisionIndex = WORKING_COPY;
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128 }
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129 if (wrongRevisionIndex(changesetRevisionIndex)) {
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130 throw new IllegalArgumentException(String.valueOf(changesetRevisionIndex));
143
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131 }
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132 endRevision = changesetRevisionIndex;
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133 return this;
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134 }
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135
143
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136 /**
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137 * Shorthand for {@link #base(int) cmd.base(BAD_REVISION)}{@link #change(int) .revision(revision)}
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138 *
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139 * @param changesetRevisionIndex compare given revision against its parent
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140 * @return <code>this</code> for convenience
143
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141 */
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142 public HgStatusCommand change(int changesetRevisionIndex) {
143
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143 base(BAD_REVISION);
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144 return revision(changesetRevisionIndex);
143
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145 }
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146
148
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147 /**
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148 * Limit status operation to certain sub-tree.
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149 *
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150 * @param scopeMatcher - matcher to use, pass <code>null/<code> to reset
148
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151 * @return <code>this</code> for convenience
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152 */
229
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153 public HgStatusCommand match(Path.Matcher scopeMatcher) {
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154 scope = scopeMatcher;
123
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155 return this;
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156 }
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157
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158 public HgStatusCommand subrepo(boolean visit) {
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159 throw HgRepository.notImplemented();
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160 }
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161
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162 /**
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163 * Perform status operation according to parameters set.
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164 *
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165 * @param statusHandler callback to get status information
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166 * @throws HgCallbackTargetException propagated exception from the handler
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167 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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168 * @throws IOException if there are (further unspecified) errors while walking working copy
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169 * @throws CancelledException if execution of the command was cancelled
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170 * @throws IllegalArgumentException if handler is <code>null</code>
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171 * @throws ConcurrentModificationException if this command already runs (i.e. being used from another thread)
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172 */
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173 public void execute(HgStatusHandler statusHandler) throws HgCallbackTargetException, HgException, IOException, CancelledException {
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174 if (statusHandler == null) {
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175 throw new IllegalArgumentException();
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176 }
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177 if (mediator.busy()) {
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178 throw new ConcurrentModificationException();
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179 }
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180 HgStatusCollector sc = new HgStatusCollector(repo); // TODO from CommandContext
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181 // PathPool pathHelper = new PathPool(repo.getPathHelper()); // TODO from CommandContext
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182 try {
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183 // XXX if I need a rough estimation (for ProgressMonitor) of number of work units,
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184 // I may use number of files in either rev1 or rev2 manifest edition
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185 mediator.start(statusHandler, getCancelSupport(statusHandler, true), new ChangelogHelper(repo, startRevision));
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186 if (endRevision == WORKING_COPY) {
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187 HgWorkingCopyStatusCollector wcsc = scope != null ? HgWorkingCopyStatusCollector.create(repo, scope) : new HgWorkingCopyStatusCollector(repo);
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188 wcsc.setBaseRevisionCollector(sc);
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189 wcsc.walk(startRevision, mediator);
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190 } else {
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191 sc.setScope(scope); // explicitly set, even if null - would be handy once we reuse StatusCollector
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192 if (startRevision == TIP) {
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193 sc.change(endRevision, mediator);
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194 } else {
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195 sc.walk(startRevision, endRevision, mediator);
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196 }
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197 }
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198 } catch (CancelledException ex) {
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199 // this is our exception, thrown from Mediator.
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200 // next check shall throw original cause of the stop - either HgCallbackTargetException or original CancelledException
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201 mediator.checkFailure();
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202 } catch (HgRuntimeException ex) {
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203 throw new HgLibraryFailureException(ex);
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204 } finally {
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205 mediator.done();
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206 }
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207 }
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208
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209 private class Mediator implements HgStatusInspector, CancelSupport {
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210 boolean needModified;
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211 boolean needAdded;
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212 boolean needRemoved;
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213 boolean needUnknown;
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214 boolean needMissing;
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215 boolean needClean;
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216 boolean needIgnored;
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217 boolean needCopies;
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218 HgStatusHandler handler;
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219 private ChangelogHelper logHelper;
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220 private CancelSupport handlerCancelSupport;
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221 private HgCallbackTargetException failure;
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222 private CancelledException cancellation;
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223
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224 Mediator() {
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225 }
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226
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227 public void start(HgStatusHandler h, CancelSupport hcs, ChangelogHelper changelogHelper) {
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228 handler = h;
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229 handlerCancelSupport = hcs;
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230 logHelper = changelogHelper;
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231 }
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232
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233 public void done() {
128
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234 handler = null;
423
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235 handlerCancelSupport = null;
128
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236 logHelper = null;
423
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237 failure = null;
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238 cancellation = null;
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239 }
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240
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241 public boolean busy() {
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242 return handler != null;
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243 }
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244
423
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245 // XXX copy from ChangesetTransformer. Perhaps, can share the code?
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246 public void checkFailure() throws HgCallbackTargetException, CancelledException {
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247 // do not forget to clear exceptions for reuse of this instance
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248 if (failure != null) {
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249 HgCallbackTargetException toThrow = failure;
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250 failure = null;
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251 throw toThrow;
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252 }
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253 if (cancellation != null) {
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254 CancelledException toThrow = cancellation;
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255 cancellation = null;
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256 throw toThrow;
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257 }
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258 }
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259
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260 // XXX copy from ChangesetTransformer. code sharing note above applies
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261 public void checkCancelled() throws CancelledException {
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262 if (failure != null || cancellation != null) {
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263 // stop status iteration. Our exception is for the purposes of cancellation only,
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264 // the one we have stored (this.cancellation) is for user
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265 throw new CancelledException();
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266 }
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267 }
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268
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269 private void dispatch(HgStatus s) {
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270 try {
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271 handler.status(s);
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272 handlerCancelSupport.checkCancelled();
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273 } catch (HgCallbackTargetException ex) {
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274 failure = ex;
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275 } catch (CancelledException ex) {
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276 cancellation = ex;
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277 }
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278 }
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279
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280 public void modified(Path fname) {
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281 if (needModified) {
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282 dispatch(new HgStatus(Modified, fname, logHelper));
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283 }
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284 }
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285 public void added(Path fname) {
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286 if (needAdded) {
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287 dispatch(new HgStatus(Added, fname, logHelper));
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288 }
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289 }
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290 public void removed(Path fname) {
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291 if (needRemoved) {
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292 dispatch(new HgStatus(Removed, fname, logHelper));
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293 }
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294 }
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295 public void copied(Path fnameOrigin, Path fnameAdded) {
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296 if (needCopies) {
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297 // TODO post-1.0 in fact, merged files may report 'copied from' as well, correct status kind thus may differ from Added
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298 dispatch(new HgStatus(Added, fnameAdded, fnameOrigin, logHelper));
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299 }
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300 }
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301 public void missing(Path fname) {
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302 if (needMissing) {
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303 dispatch(new HgStatus(Missing, fname, logHelper));
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304 }
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305 }
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306 public void unknown(Path fname) {
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307 if (needUnknown) {
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308 dispatch(new HgStatus(Unknown, fname, logHelper));
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309 }
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310 }
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311 public void clean(Path fname) {
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312 if (needClean) {
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313 dispatch(new HgStatus(Clean, fname, logHelper));
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314 }
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315 }
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316 public void ignored(Path fname) {
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317 if (needIgnored) {
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318 dispatch(new HgStatus(Ignored, fname, logHelper));
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319 }
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320 }
360
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321
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322 public void invalid(Path fname, Exception err) {
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323 try {
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324 handler.error(fname, new Outcome(Outcome.Kind.Failure, "Failed to get file status", err));
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325 handlerCancelSupport.checkCancelled();
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326 } catch (HgCallbackTargetException ex) {
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327 failure = ex;
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328 } catch (CancelledException ex) {
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329 cancellation = ex;
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330 }
360
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331 }
64
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332 }
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333 }