Mercurial > jhg

annotate src/org/tmatesoft/hg/core/HgManifestCommand.java @ 709:497e697636fc

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Report merged lines as changed block if possible, not as a sequence of added/deleted blocks. To facilitate access to merge parent lines AddBlock got mergeLineAt() method that reports index of the line in the second parent (if any), while insertedAt() has been changed to report index in the first parent always
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 21 Aug 2013 16:23:27 +0200
parents 98ff1fb49abe
children
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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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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79 /**
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80 * Limit command to visit specific subset of repository revisions
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81 *
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82 * @see #range(int, int)
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83 * @param cset1 range start revision
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84 * @param cset2 range end revision
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85 * @return <code>this</code> instance for convenience
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86 * @throws HgBadArgumentException if revisions are not valid changeset identifiers
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87 */
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88 public HgManifestCommand range(Nodeid cset1, Nodeid cset2) throws HgBadArgumentException {
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89 CsetParamKeeper pk = new CsetParamKeeper(repo);
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90 int r1 = pk.set(cset1).get();
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91 int r2 = pk.set(cset2).get();
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92 return range(r1, r2);
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93 }
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95 /**
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96 * Select changeset for the command using revision index
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97 * @param csetRevisionIndex index of changeset revision
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98 * @return <code>this</code> for convenience.
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99 */
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100 public HgManifestCommand changeset(int csetRevisionIndex) {
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101 // TODO [2.0 API break] shall throw HgBadArgumentException, like other commands do
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102 return range(csetRevisionIndex, csetRevisionIndex);
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103 }
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104
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105 /**
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106 * Select changeset for the command
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107 *
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108 * @param nid changeset revision
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109 * @return <code>this</code> for convenience
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110 * @throws HgBadArgumentException if failed to find supplied changeset revision
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111 */
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112 public HgManifestCommand changeset(Nodeid nid) throws HgBadArgumentException {
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113 // XXX also see HgLogCommand#changeset(Nodeid)
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114 final int csetRevIndex = new CsetParamKeeper(repo).set(nid).get();
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115 return range(csetRevIndex, csetRevIndex);
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116 }
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117
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118 public HgManifestCommand dirs(boolean include) {
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119 // XXX whether directories with directories only are include or not
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120 // now lists only directories with files
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121 needDirs = include;
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122 return this;
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123 }
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124
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125 /**
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126 * Limit manifest walk to a subset of files.
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127 * @param pathMatcher - filter, pass <code>null</code> to clear.
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128 * @return <code>this</code> instance for convenience
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129 */
131
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130 public HgManifestCommand match(Path.Matcher pathMatcher) {
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131 matcher = pathMatcher;
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132 return this;
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133 }
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134
148
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135 /**
427
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136 * With all parameters set, execute the command.
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137 *
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138 * @param handler - callback to get the outcome
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139 * @throws HgCallbackTargetException propagated exception from the handler
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140 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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141 * @throws CancelledException if execution of the command was cancelled
148
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142 * @throws IllegalArgumentException if handler is <code>null</code>
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143 * @throws ConcurrentModificationException if this command is already in use (running)
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144 */
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145 public void execute(HgManifestHandler handler) throws HgCallbackTargetException, HgException, CancelledException {
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146 if (handler == null) {
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147 throw new IllegalArgumentException();
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148 }
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149 if (visitor != null) {
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150 throw new ConcurrentModificationException();
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151 }
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152 try {
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153 visitor = handler;
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154 mediator.start(getCancelSupport(handler, true));
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155 repo.getManifest().walk(startRev, endRev, mediator);
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156 mediator.checkFailure();
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157 } catch (HgRuntimeException ex) {
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158 throw new HgLibraryFailureException(ex);
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159 } finally {
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160 mediator.done();
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161 visitor = null;
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162 }
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163 }
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164
132
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165 // I'd rather let HgManifestCommand implement HgManifest.Inspector directly, but this pollutes API alot
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166 private class Mediator implements HgManifest.Inspector {
142
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167 // file names are likely to repeat in each revision, hence caching of Paths.
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168 // However, once HgManifest.Inspector switches to Path objects, perhaps global Path pool
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169 // might be more effective?
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170 private PathPool pathPool;
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171 private List<HgFileRevision> manifestContent;
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172 private Nodeid manifestNodeid;
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173 private Exception failure;
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174 private CancelSupport cancelHelper;
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175
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176 public void start(CancelSupport cs) {
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177 assert cs != null;
142
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178 // Manifest keeps normalized paths
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179 pathPool = new PathPool(new PathRewrite.Empty());
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180 cancelHelper = cs;
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181 }
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182
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183 public void done() {
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184 manifestContent = null;
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185 pathPool = null;
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186 }
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187
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188 private void recordFailure(HgCallbackTargetException ex) {
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189 failure = ex;
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190 }
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191 private void recordCancel(CancelledException ex) {
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192 failure = ex;
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193 }
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194
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195 public void checkFailure() throws HgCallbackTargetException, CancelledException {
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196 // TODO post-1.0 perhaps, can combine this code (record/checkFailure) for reuse in more classes (e.g. in Revlog)
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197 if (failure instanceof HgCallbackTargetException) {
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198 HgCallbackTargetException ex = (HgCallbackTargetException) failure;
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199 failure = null;
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200 throw ex;
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201 }
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202 if (failure instanceof CancelledException) {
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203 CancelledException ex = (CancelledException) failure;
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204 failure = null;
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205 throw ex;
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206 }
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207 }
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208
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209 public boolean begin(int manifestRevision, Nodeid nid, int changelogRevision) throws HgRuntimeException {
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210 if (needDirs && manifestContent == null) {
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211 manifestContent = new LinkedList<HgFileRevision>();
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212 }
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213 try {
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214 visitor.begin(manifestNodeid = nid);
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215 cancelHelper.checkCancelled();
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216 return true;
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217 } catch (HgCallbackTargetException ex) {
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218 recordFailure(ex);
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219 return false;
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220 } catch (CancelledException ex) {
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221 recordCancel(ex);
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222 return false;
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223 }
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224 }
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225 public boolean end(int revision) throws HgRuntimeException {
427
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226 try {
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227 if (needDirs) {
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228 LinkedHashMap<Path, LinkedList<HgFileRevision>> breakDown = new LinkedHashMap<Path, LinkedList<HgFileRevision>>();
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229 for (HgFileRevision fr : manifestContent) {
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230 Path filePath = fr.getPath();
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231 Path dirPath = pathPool.parent(filePath);
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232 LinkedList<HgFileRevision> revs = breakDown.get(dirPath);
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233 if (revs == null) {
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234 revs = new LinkedList<HgFileRevision>();
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235 breakDown.put(dirPath, revs);
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236 }
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237 revs.addLast(fr);
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238 }
427
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239 for (Path dir : breakDown.keySet()) {
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240 visitor.dir(dir);
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241 cancelHelper.checkCancelled();
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242 for (HgFileRevision fr : breakDown.get(dir)) {
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243 visitor.file(fr);
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244 }
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245 }
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246 manifestContent.clear();
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247 }
427
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248 visitor.end(manifestNodeid);
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249 cancelHelper.checkCancelled();
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250 return true;
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251 } catch (HgCallbackTargetException ex) {
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252 recordFailure(ex);
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253 return false;
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254 } catch (CancelledException ex) {
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255 recordCancel(ex);
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256 return false;
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257 } finally {
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258 manifestNodeid = null;
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259 }
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260 }
285
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261
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262 public boolean next(Nodeid nid, Path fname, Flags flags) throws HgRuntimeException {
285
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263 if (matcher != null && !matcher.accept(fname)) {
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264 return true;
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265 }
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266 try {
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267 HgFileRevision fr = new HgFileRevision(repo, nid, flags, fname);
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268 if (needDirs) {
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269 manifestContent.add(fr);
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270 } else {
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271 visitor.file(fr);
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272 }
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273 return true;
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274 } catch (HgCallbackTargetException ex) {
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275 recordFailure(ex);
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276 return false;
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277 }
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278 }
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279 }
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280 }