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annotate src/org/tmatesoft/hg/core/HgManifestCommand.java @ 655:bcbcc318f250

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Performance: reuse unzip output buffer
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 04 Jul 2013 18:36:38 +0200
parents 6526d8adbc0f
children 98ff1fb49abe
rev   line source
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1 /*
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2 * Copyright (c) 2011-2013 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.core;
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18
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19 import static org.tmatesoft.hg.repo.HgRepository.*;
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21 import java.util.ConcurrentModificationException;
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22 import java.util.LinkedHashMap;
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23 import java.util.LinkedList;
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24 import java.util.List;
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25
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26 import org.tmatesoft.hg.internal.CsetParamKeeper;
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27 import org.tmatesoft.hg.internal.PathPool;
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28 import org.tmatesoft.hg.repo.HgManifest;
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29 import org.tmatesoft.hg.repo.HgManifest.Flags;
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30 import org.tmatesoft.hg.repo.HgRepository;
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31 import org.tmatesoft.hg.repo.HgRuntimeException;
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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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34 import org.tmatesoft.hg.util.Path;
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35 import org.tmatesoft.hg.util.PathRewrite;
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38 /**
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39 * Gives access to list of files in each revision (Mercurial manifest information), 'hg manifest' counterpart.
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40 *
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41 * @author Artem Tikhomirov
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42 * @author TMate Software Ltd.
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43 */
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44 public class HgManifestCommand extends HgAbstractCommand<HgManifestCommand> {
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46 private final HgRepository repo;
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47 private Path.Matcher matcher;
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48 private int startRev = 0, endRev = TIP;
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49 private HgManifestHandler visitor;
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50 private boolean needDirs = false;
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52 private final Mediator mediator = new Mediator();
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53
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54 public HgManifestCommand(HgRepository hgRepo) {
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55 repo = hgRepo;
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56 }
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57
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58 /**
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59 * Parameterize command to visit revisions <code>[rev1..rev2]</code>.
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60 * @param rev1 - revision local index to start from. Non-negative. May be {@link HgRepository#TIP} (rev2 argument shall be {@link HgRepository#TIP} as well, then)
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61 * @param rev2 - revision local index to end with, inclusive. Non-negative, greater or equal to rev1. May be {@link HgRepository#TIP}.
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62 * @return <code>this</code> for convenience.
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63 * @throws IllegalArgumentException if revision arguments are incorrect (see above).
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64 */
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65 public HgManifestCommand range(int rev1, int rev2) {
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66 // XXX if manifest range is different from that of changelog, need conversion utils (external?)
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67 boolean badArgs = rev1 == BAD_REVISION || rev2 == BAD_REVISION || rev1 == WORKING_COPY || rev2 == WORKING_COPY;
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68 badArgs |= rev2 != TIP && rev2 < rev1; // range(3, 1);
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69 badArgs |= rev1 == TIP && rev2 != TIP; // range(TIP, 2), although this may be legitimate when TIP points to 2
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70 if (badArgs) {
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71 // TODO [2.0 API break] throw checked HgBadArgumentException instead
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72 throw new IllegalArgumentException(String.format("Bad range: [%d, %d]", rev1, rev2));
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73 }
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74 startRev = rev1;
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75 endRev = rev2;
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76 return this;
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77 }
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78
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79 /**
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80 * Select changeset for the command using revision index
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81 * @param csetRevisionIndex index of changeset revision
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82 * @return <code>this</code> for convenience.
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83 */
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84 public HgManifestCommand changeset(int csetRevisionIndex) {
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85 // TODO [2.0 API break] shall throw HgBadArgumentException, like other commands do
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86 return range(csetRevisionIndex, csetRevisionIndex);
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87 }
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88
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89 /**
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90 * Select changeset for the command
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91 *
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92 * @param nid changeset revision
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93 * @return <code>this</code> for convenience
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94 * @throws HgBadArgumentException if failed to find supplied changeset revision
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95 */
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96 public HgManifestCommand changeset(Nodeid nid) throws HgBadArgumentException {
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97 // XXX also see HgLogCommand#changeset(Nodeid)
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98 final int csetRevIndex = new CsetParamKeeper(repo).set(nid).get();
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99 return range(csetRevIndex, csetRevIndex);
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100 }
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101
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102 public HgManifestCommand dirs(boolean include) {
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103 // XXX whether directories with directories only are include or not
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104 // now lists only directories with files
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105 needDirs = include;
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106 return this;
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107 }
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109 /**
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110 * Limit manifest walk to a subset of files.
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111 * @param pathMatcher - filter, pass <code>null</code> to clear.
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112 * @return <code>this</code> instance for convenience
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113 */
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114 public HgManifestCommand match(Path.Matcher pathMatcher) {
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115 matcher = pathMatcher;
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116 return this;
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117 }
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118
148
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119 /**
427
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120 * With all parameters set, execute the command.
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121 *
148
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122 * @param handler - callback to get the outcome
427
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123 * @throws HgCallbackTargetException propagated exception from the handler
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124 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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125 * @throws CancelledException if execution of the command was cancelled
148
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126 * @throws IllegalArgumentException if handler is <code>null</code>
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127 * @throws ConcurrentModificationException if this command is already in use (running)
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128 */
427
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129 public void execute(HgManifestHandler handler) throws HgCallbackTargetException, HgException, CancelledException {
64
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130 if (handler == null) {
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131 throw new IllegalArgumentException();
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132 }
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133 if (visitor != null) {
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134 throw new ConcurrentModificationException();
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135 }
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136 try {
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137 visitor = handler;
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138 mediator.start(getCancelSupport(handler, true));
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139 repo.getManifest().walk(startRev, endRev, mediator);
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140 mediator.checkFailure();
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141 } catch (HgRuntimeException ex) {
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142 throw new HgLibraryFailureException(ex);
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143 } finally {
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bf304cb14247 Just in case mediator does anything to visitor on done()
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144 mediator.done();
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145 visitor = null;
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146 }
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147 }
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148
132
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149 // I'd rather let HgManifestCommand implement HgManifest.Inspector directly, but this pollutes API alot
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150 private class Mediator implements HgManifest.Inspector {
142
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151 // file names are likely to repeat in each revision, hence caching of Paths.
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152 // However, once HgManifest.Inspector switches to Path objects, perhaps global Path pool
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153 // might be more effective?
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154 private PathPool pathPool;
231
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155 private List<HgFileRevision> manifestContent;
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156 private Nodeid manifestNodeid;
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157 private Exception failure;
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158 private CancelSupport cancelHelper;
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159
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160 public void start(CancelSupport cs) {
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161 assert cs != null;
142
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162 // Manifest keeps normalized paths
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163 pathPool = new PathPool(new PathRewrite.Empty());
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164 cancelHelper = cs;
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165 }
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166
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167 public void done() {
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168 manifestContent = null;
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169 pathPool = null;
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170 }
427
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171
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172 private void recordFailure(HgCallbackTargetException ex) {
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173 failure = ex;
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174 }
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175 private void recordCancel(CancelledException ex) {
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176 failure = ex;
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177 }
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178
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179 public void checkFailure() throws HgCallbackTargetException, CancelledException {
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180 // TODO post-1.0 perhaps, can combine this code (record/checkFailure) for reuse in more classes (e.g. in Revlog)
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181 if (failure instanceof HgCallbackTargetException) {
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182 HgCallbackTargetException ex = (HgCallbackTargetException) failure;
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183 failure = null;
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184 throw ex;
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185 }
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186 if (failure instanceof CancelledException) {
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187 CancelledException ex = (CancelledException) failure;
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188 failure = null;
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189 throw ex;
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190 }
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191 }
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192
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193 public boolean begin(int manifestRevision, Nodeid nid, int changelogRevision) throws HgRuntimeException {
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194 if (needDirs && manifestContent == null) {
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195 manifestContent = new LinkedList<HgFileRevision>();
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196 }
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197 try {
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198 visitor.begin(manifestNodeid = nid);
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199 cancelHelper.checkCancelled();
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200 return true;
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201 } catch (HgCallbackTargetException ex) {
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202 recordFailure(ex);
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203 return false;
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204 } catch (CancelledException ex) {
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205 recordCancel(ex);
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206 return false;
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207 }
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208 }
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209 public boolean end(int revision) throws HgRuntimeException {
427
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210 try {
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211 if (needDirs) {
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212 LinkedHashMap<Path, LinkedList<HgFileRevision>> breakDown = new LinkedHashMap<Path, LinkedList<HgFileRevision>>();
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213 for (HgFileRevision fr : manifestContent) {
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214 Path filePath = fr.getPath();
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215 Path dirPath = pathPool.parent(filePath);
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216 LinkedList<HgFileRevision> revs = breakDown.get(dirPath);
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217 if (revs == null) {
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218 revs = new LinkedList<HgFileRevision>();
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219 breakDown.put(dirPath, revs);
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220 }
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221 revs.addLast(fr);
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222 }
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223 for (Path dir : breakDown.keySet()) {
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224 visitor.dir(dir);
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225 cancelHelper.checkCancelled();
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226 for (HgFileRevision fr : breakDown.get(dir)) {
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227 visitor.file(fr);
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228 }
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229 }
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230 manifestContent.clear();
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231 }
427
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232 visitor.end(manifestNodeid);
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233 cancelHelper.checkCancelled();
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234 return true;
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235 } catch (HgCallbackTargetException ex) {
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236 recordFailure(ex);
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237 return false;
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238 } catch (CancelledException ex) {
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239 recordCancel(ex);
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240 return false;
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241 } finally {
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242 manifestNodeid = null;
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243 }
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244 }
285
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245
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246 public boolean next(Nodeid nid, Path fname, Flags flags) throws HgRuntimeException {
285
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247 if (matcher != null && !matcher.accept(fname)) {
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248 return true;
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249 }
427
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250 try {
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251 HgFileRevision fr = new HgFileRevision(repo, nid, flags, fname);
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252 if (needDirs) {
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253 manifestContent.add(fr);
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254 } else {
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255 visitor.file(fr);
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256 }
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257 return true;
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258 } catch (HgCallbackTargetException ex) {
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259 recordFailure(ex);
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260 return false;
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261 }
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262 }
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263 }
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264 }