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annotate src/org/tmatesoft/hg/core/HgStatusCommand.java @ 423:9c9c442b5f2e

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Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 23 Mar 2012 22:51:18 +0100
parents 7f136a3fa671
children 6437d261048a
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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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.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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26 import org.tmatesoft.hg.internal.ChangelogHelper;
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6f1b88693d48 Complete refactoring to org.tmatesoft
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27 import org.tmatesoft.hg.repo.HgRepository;
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28 import org.tmatesoft.hg.repo.HgStatusCollector;
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29 import org.tmatesoft.hg.repo.HgStatusInspector;
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30 import org.tmatesoft.hg.repo.HgWorkingCopyStatusCollector;
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31 import org.tmatesoft.hg.util.CancelSupport;
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32 import org.tmatesoft.hg.util.CancelledException;
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33 import org.tmatesoft.hg.util.Path;
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34 import org.tmatesoft.hg.util.Status;
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36 /**
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37 * Command to obtain file status information, 'hg status' counterpart.
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38 *
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39 * @author Artem Tikhomirov
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40 * @author TMate Software Ltd.
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41 */
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42 public class HgStatusCommand extends HgAbstractCommand<HgStatusCommand> {
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43 private final HgRepository repo;
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44
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45 private int startRevision = TIP;
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46 private int endRevision = WORKING_COPY;
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47 private Path.Matcher scope;
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49 private final Mediator mediator = new Mediator();
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50
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51 public HgStatusCommand(HgRepository hgRepo) {
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52 repo = hgRepo;
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53 defaults();
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54 }
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56 public HgStatusCommand defaults() {
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57 final Mediator m = mediator;
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58 m.needModified = m.needAdded = m.needRemoved = m.needUnknown = m.needMissing = true;
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59 m.needCopies = m.needClean = m.needIgnored = false;
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60 return this;
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61 }
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62 public HgStatusCommand all() {
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63 final Mediator m = mediator;
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64 m.needModified = m.needAdded = m.needRemoved = m.needUnknown = m.needMissing = true;
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65 m.needCopies = m.needClean = m.needIgnored = true;
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66 return this;
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67 }
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70 public HgStatusCommand modified(boolean include) {
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71 mediator.needModified = include;
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72 return this;
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73 }
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74 public HgStatusCommand added(boolean include) {
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75 mediator.needAdded = include;
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76 return this;
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77 }
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78 public HgStatusCommand removed(boolean include) {
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79 mediator.needRemoved = include;
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80 return this;
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81 }
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82 public HgStatusCommand deleted(boolean include) {
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83 mediator.needMissing = include;
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84 return this;
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85 }
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86 public HgStatusCommand unknown(boolean include) {
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87 mediator.needUnknown = include;
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88 return this;
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89 }
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90 public HgStatusCommand clean(boolean include) {
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91 mediator.needClean = include;
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92 return this;
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93 }
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94 public HgStatusCommand ignored(boolean include) {
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95 mediator.needIgnored = include;
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96 return this;
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97 }
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99 /**
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100 * If set, either base:revision or base:workingdir
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101 * to unset, pass {@link HgRepository#TIP} or {@link HgRepository#BAD_REVISION}
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102 * @param changesetRevisionIndex - local index of a changeset to base status from
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103 * @return <code>this</code> for convenience
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104 * @throws IllegalArgumentException when revision is negative or {@link HgRepository#WORKING_COPY}
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105 */
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106 public HgStatusCommand base(int changesetRevisionIndex) {
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107 if (changesetRevisionIndex == WORKING_COPY || wrongRevisionIndex(changesetRevisionIndex)) {
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108 throw new IllegalArgumentException(String.valueOf(changesetRevisionIndex));
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109 }
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110 if (changesetRevisionIndex == BAD_REVISION) {
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111 changesetRevisionIndex = TIP;
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112 }
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113 startRevision = changesetRevisionIndex;
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114 return this;
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115 }
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116
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117 /**
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118 * Revision without base == --change
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119 * Pass {@link HgRepository#WORKING_COPY} or {@link HgRepository#BAD_REVISION} to reset
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120 * @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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121 * @return <code>this</code> for convenience
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122 * @throws IllegalArgumentException if revision index doesn't specify legitimate revision.
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123 */
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124 public HgStatusCommand revision(int changesetRevisionIndex) {
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125 if (changesetRevisionIndex == BAD_REVISION) {
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126 changesetRevisionIndex = WORKING_COPY;
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127 }
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128 if (wrongRevisionIndex(changesetRevisionIndex)) {
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129 throw new IllegalArgumentException(String.valueOf(changesetRevisionIndex));
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130 }
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131 endRevision = changesetRevisionIndex;
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132 return this;
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133 }
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134
143
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135 /**
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136 * Shorthand for {@link #base(int) cmd.base(BAD_REVISION)}{@link #change(int) .revision(revision)}
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137 *
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138 * @param revision compare given revision against its parent
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139 * @return <code>this</code> for convenience
143
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140 */
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141 public HgStatusCommand change(int revision) {
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142 base(BAD_REVISION);
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143 return revision(revision);
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144 }
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145
148
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146 /**
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147 * Limit status operation to certain sub-tree.
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148 *
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149 * @param scopeMatcher - matcher to use, pass <code>null/<code> to reset
148
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150 * @return <code>this</code> for convenience
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151 */
229
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152 public HgStatusCommand match(Path.Matcher scopeMatcher) {
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153 scope = scopeMatcher;
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154 return this;
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155 }
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156
131
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157 public HgStatusCommand subrepo(boolean visit) {
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158 throw HgRepository.notImplemented();
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159 }
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160
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161 /**
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162 * Perform status operation according to parameters set.
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163 *
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164 * @param statusHandler callback to get status information
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165 * @throws HgCallbackTargetException wrapper for any exception user callback code may produce
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166 * @throws CancelledException if execution of the command was cancelled
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167 * @throws IOException FIXME EXCEPTIONS WTF it's doing here if there are (further unspecified) errors while walking working copy
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168 * @throws IllegalArgumentException if handler is <code>null</code>
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169 * @throws ConcurrentModificationException if this command already runs (i.e. being used from another thread)
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170 */
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171 public void execute(HgStatusHandler statusHandler) throws HgCallbackTargetException, CancelledException, HgException, IOException {
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172 if (statusHandler == null) {
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173 throw new IllegalArgumentException();
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174 }
128
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175 if (mediator.busy()) {
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176 throw new ConcurrentModificationException();
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177 }
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178 HgStatusCollector sc = new HgStatusCollector(repo); // TODO from CommandContext
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179 // PathPool pathHelper = new PathPool(repo.getPathHelper()); // TODO from CommandContext
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180 try {
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181 // XXX if I need a rough estimation (for ProgressMonitor) of number of work units,
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182 // I may use number of files in either rev1 or rev2 manifest edition
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183 mediator.start(statusHandler, getCancelSupport(statusHandler, true), new ChangelogHelper(repo, startRevision));
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184 if (endRevision == WORKING_COPY) {
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185 HgWorkingCopyStatusCollector wcsc = scope != null ? HgWorkingCopyStatusCollector.create(repo, scope) : new HgWorkingCopyStatusCollector(repo);
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186 wcsc.setBaseRevisionCollector(sc);
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187 wcsc.walk(startRevision, mediator);
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188 } else {
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189 sc.setScope(scope); // explicitly set, even if null - would be handy once we reuse StatusCollector
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190 if (startRevision == TIP) {
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191 sc.change(endRevision, mediator);
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192 } else {
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193 sc.walk(startRevision, endRevision, mediator);
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194 }
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195 }
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196 } catch (CancelledException ex) {
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197 // this is our exception, thrown from Mediator.
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198 // next check shall throw original cause of the stop - either HgCallbackTargetException or original CancelledException
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199 mediator.checkFailure();
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200 } finally {
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201 mediator.done();
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202 }
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203 }
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204
360
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205 /**
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206 * @deprecated replaced with {@link HgStatusHandler}
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207 */
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208 @Deprecated
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209 public interface Handler extends HgStatusHandler{
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210 void handleStatus(HgStatus s);
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211 }
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212
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213 private class Mediator implements HgStatusInspector, CancelSupport {
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214 boolean needModified;
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215 boolean needAdded;
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216 boolean needRemoved;
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217 boolean needUnknown;
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218 boolean needMissing;
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219 boolean needClean;
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220 boolean needIgnored;
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221 boolean needCopies;
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222 HgStatusHandler handler;
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223 private ChangelogHelper logHelper;
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224 private CancelSupport handlerCancelSupport;
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225 private HgCallbackTargetException failure;
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226 private CancelledException cancellation;
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227
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228 Mediator() {
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229 }
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230
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231 public void start(HgStatusHandler h, CancelSupport hcs, ChangelogHelper changelogHelper) {
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232 handler = h;
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233 handlerCancelSupport = hcs;
128
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234 logHelper = changelogHelper;
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235 }
128
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236
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237 public void done() {
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238 handler = null;
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239 handlerCancelSupport = null;
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240 logHelper = null;
423
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241 failure = null;
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242 cancellation = null;
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243 }
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244
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245 public boolean busy() {
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246 return handler != null;
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247 }
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248
423
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249 // XXX copy from ChangesetTransformer. Perhaps, can share the code?
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250 public void checkFailure() throws HgCallbackTargetException, CancelledException {
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251 // do not forget to clear exceptions for reuse of this instance
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252 if (failure != null) {
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253 HgCallbackTargetException toThrow = failure;
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254 failure = null;
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255 throw toThrow;
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256 }
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257 if (cancellation != null) {
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258 CancelledException toThrow = cancellation;
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259 cancellation = null;
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260 throw toThrow;
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261 }
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262 }
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263
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264 // XXX copy from ChangesetTransformer. code sharing note above applies
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265 public void checkCancelled() throws CancelledException {
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266 if (failure != null || cancellation != null) {
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267 // stop status iteration. Our exception is for the purposes of cancellation only,
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268 // the one we have stored (this.cancellation) is for user
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269 throw new CancelledException();
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270 }
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271 }
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272
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273 private void dispatch(HgStatus s) {
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274 try {
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275 handler.handleStatus(s);
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276 handlerCancelSupport.checkCancelled();
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277 } catch (HgCallbackTargetException ex) {
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278 failure = ex;
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279 } catch (CancelledException ex) {
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280 cancellation = ex;
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281 }
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282 }
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283
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284 public void modified(Path fname) {
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285 if (needModified) {
423
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286 dispatch(new HgStatus(Modified, fname, logHelper));
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287 }
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288 }
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289 public void added(Path fname) {
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290 if (needAdded) {
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291 dispatch(new HgStatus(Added, fname, logHelper));
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292 }
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293 }
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294 public void removed(Path fname) {
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295 if (needRemoved) {
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296 dispatch(new HgStatus(Removed, fname, logHelper));
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297 }
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298 }
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299 public void copied(Path fnameOrigin, Path fnameAdded) {
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300 if (needCopies) {
418
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301 // TODO post-1.0 in fact, merged files may report 'copied from' as well, correct status kind thus may differ from Added
423
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302 dispatch(new HgStatus(Added, fnameAdded, fnameOrigin, logHelper));
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303 }
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304 }
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305 public void missing(Path fname) {
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306 if (needMissing) {
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307 dispatch(new HgStatus(Missing, fname, logHelper));
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308 }
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309 }
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310 public void unknown(Path fname) {
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311 if (needUnknown) {
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312 dispatch(new HgStatus(Unknown, fname, logHelper));
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313 }
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314 }
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315 public void clean(Path fname) {
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316 if (needClean) {
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317 dispatch(new HgStatus(Clean, fname, logHelper));
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318 }
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319 }
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320 public void ignored(Path fname) {
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321 if (needIgnored) {
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322 dispatch(new HgStatus(Ignored, fname, logHelper));
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323 }
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324 }
360
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325
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326 public void invalid(Path fname, Exception err) {
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327 try {
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328 handler.handleError(fname, new Status(Status.Kind.ERROR, "Failed to get file status", err));
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329 handlerCancelSupport.checkCancelled();
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330 } catch (HgCallbackTargetException ex) {
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331 failure = ex;
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332 } catch (CancelledException ex) {
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333 cancellation = ex;
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334 }
360
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335 }
64
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336 }
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337 }