annotate src/org/tmatesoft/hg/repo/HgManifest.java @ 417:ccd7d25e5aea

New and better name for HgFileInformer - HgChangesetFileSneaker. Explain (comments) ties between HgManifest, HgDataFile, HgChangesetFileSneaker and reasons for method placement
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 22 Mar 2012 20:14:06 +0100
parents ee8264d80747
children 7f136a3fa671
rev   line source
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1 /*
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2 * Copyright (c) 2010-2012 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.repo;
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19 import static org.tmatesoft.hg.core.Nodeid.NULL;
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20 import static org.tmatesoft.hg.repo.HgRepository.BAD_REVISION;
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21 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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22
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23 import java.io.ByteArrayOutputStream;
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24 import java.io.IOException;
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25 import java.util.ArrayList;
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26 import java.util.Arrays;
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27 import java.util.HashMap;
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28 import java.util.Map;
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30 import org.tmatesoft.hg.core.HgBadStateException;
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31 import org.tmatesoft.hg.core.HgChangesetFileSneaker;
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32 import org.tmatesoft.hg.core.HgException;
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33 import org.tmatesoft.hg.core.HgInvalidControlFileException;
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34 import org.tmatesoft.hg.core.HgInvalidRevisionException;
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35 import org.tmatesoft.hg.core.Nodeid;
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36 import org.tmatesoft.hg.internal.DataAccess;
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37 import org.tmatesoft.hg.internal.DigestHelper;
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38 import org.tmatesoft.hg.internal.EncodingHelper;
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39 import org.tmatesoft.hg.internal.Experimental;
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40 import org.tmatesoft.hg.internal.IntMap;
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41 import org.tmatesoft.hg.internal.IterateControlMediator;
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42 import org.tmatesoft.hg.internal.Lifecycle;
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43 import org.tmatesoft.hg.internal.Pool2;
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44 import org.tmatesoft.hg.internal.RevlogStream;
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45 import org.tmatesoft.hg.util.CancelSupport;
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46 import org.tmatesoft.hg.util.Path;
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47 import org.tmatesoft.hg.util.ProgressSupport;
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48
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49
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50 /**
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51 *
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52 * @author Artem Tikhomirov
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53 * @author TMate Software Ltd.
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54 */
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55 public class HgManifest extends Revlog {
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56 private RevisionMapper revisionMap;
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57 private EncodingHelper encodingHelper;
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58
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59 /**
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60 * File flags recorded in manifest
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61 */
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62 public enum Flags {
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63 /**
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64 * Executable bit set
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65 */
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66 Exec,
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67 /**
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68 * Symbolic link
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69 */
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70 Link,
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71 /**
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72 * Regular file
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73 */
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74 RegularFile;
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75
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76 static Flags parse(String flags) {
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77 if ("x".equalsIgnoreCase(flags)) {
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78 return Exec;
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79 }
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80 if ("l".equalsIgnoreCase(flags)) {
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81 return Link;
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82 }
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83 if (flags == null) {
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84 return RegularFile;
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85 }
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86 throw new IllegalStateException(flags);
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87 }
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88
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89 static Flags parse(byte[] data, int start, int length) {
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90 if (length == 0) {
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91 return RegularFile;
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92 }
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93 if (length == 1) {
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94 if (data[start] == 'x') {
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95 return Exec;
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96 }
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97 if (data[start] == 'l') {
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98 return Link;
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99 }
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100 // FALL THROUGH
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101 }
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102 throw new IllegalStateException(new String(data, start, length));
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103 }
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104
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105 String nativeString() {
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106 if (this == Exec) {
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107 return "x";
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108 }
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109 if (this == Link) {
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110 return "l";
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111 }
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112 if (this == RegularFile) {
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113 return "";
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114 }
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115 throw new IllegalStateException(toString());
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116 }
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117 }
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118
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119 /*package-local*/ HgManifest(HgRepository hgRepo, RevlogStream content, EncodingHelper eh) {
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120 super(hgRepo, content);
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121 encodingHelper = eh;
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122 }
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123
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124 /**
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125 * Walks manifest revisions that correspond to specified range of changesets. The order in which manifest versions get reported
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126 * to the inspector corresponds to physical order of manifest revisions, not that of changesets (with few exceptions as noted below).
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127 * That is, for cset-manifest revision pairs:
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128 * <pre>
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129 * 3 8
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130 * 4 7
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131 * 5 9
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132 * </pre>
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133 * call <code>walk(3,5, insp)</code> would yield (4,7), (3,8) and (5,9) to the inspector;
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134 * different order of arguments, <code>walk(5, 3, insp)</code>, makes no difference.
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135 *
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136 * <p>Physical layout of mercurial files (revlog) doesn't impose any restriction on whether manifest and changeset revisions shall go
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137 * incrementally, nor it mandates presence of manifest version for a changeset. Thus, there might be changesets that record {@link Nodeid#NULL}
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138 * as corresponding manifest revision. This situation is deemed exceptional now and what would <code>inspector</code> get depends on whether
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139 * <code>start</code> or <code>end</code> arguments point to such changeset, or such changeset happen to be somewhere inside the range
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140 * <code>[start..end]</code>. Implementation does it best to report empty manifests (<code>Inspector.begin(BAD_REVISION, NULL, csetRevIndex);</code>
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141 * followed immediately by <code>Inspector.end(BAD_REVISION)</code> when <code>start</code> and/or <code>end</code> point to changeset with no associated
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142 * manifest revision. However, if changeset-manifest revision pairs look like:
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143 * <pre>
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144 * 3 8
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145 * 4 -1 (cset records null revision for manifest)
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146 * 5 9
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147 * </pre>
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148 * call <code>walk(3,5, insp)</code> would yield only (3,8) and (5,9) to the inspector, without additional empty
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149 * <code>Inspector.begin(); Inspector.end()</code> call pair.
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150 *
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151 * @param start changelog (not manifest!) revision to begin with
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152 * @param end changelog (not manifest!) revision to stop, inclusive.
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153 * @param inspector manifest revision visitor, can't be <code>null</code>
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154 * @throws HgInvalidRevisionException if start or end specify non-existent revision index
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155 * @throws IllegalArgumentException if start or end is not a revision index
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156 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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157 */
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158 public void walk(int start, int end, final Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
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159 if (inspector == null) {
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160 throw new IllegalArgumentException();
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161 }
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162 final int csetFirst = start <= end ? start : end, csetLast = start > end ? start : end;
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163 int manifestFirst, manifestLast, i = 0;
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164 do {
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165 manifestFirst = fromChangelog(csetFirst+i);
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166 if (manifestFirst == BAD_REVISION) {
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167 inspector.begin(BAD_REVISION, NULL, csetFirst+i);
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168 inspector.end(BAD_REVISION);
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169 }
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170 i++;
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171 } while (manifestFirst == BAD_REVISION && csetFirst+i <= csetLast);
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172 if (manifestFirst == BAD_REVISION) {
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173 getRepo().getContext().getLog().info(getClass(), "None of changesets [%d..%d] have associated manifest revision", csetFirst, csetLast);
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174 // we ran through all revisions in [start..end] and none of them had manifest.
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175 // we reported that to inspector and proceeding is done now.
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176 return;
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177 }
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178 i = 0;
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179 do {
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180 manifestLast = fromChangelog(csetLast-i);
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181 if (manifestLast == BAD_REVISION) {
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182 inspector.begin(BAD_REVISION, NULL, csetLast-i);
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183 inspector.end(BAD_REVISION);
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184 }
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185 i++;
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186 } while (manifestLast == BAD_REVISION && csetLast-i >= csetFirst);
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187 if (manifestLast == BAD_REVISION) {
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188 // hmm, manifestFirst != -1 here, hence there's i from [csetFirst..csetLast] for which manifest entry exists,
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189 // and thus it's impossible to run into manifestLast == -1. Nevertheless, never hurts to check.
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190 throw new HgBadStateException(String.format("Manifest %d-%d(!) for cset range [%d..%d] ", manifestFirst, manifestLast, csetFirst, csetLast));
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191 }
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192 if (manifestLast < manifestFirst) {
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193 // there are tool-constructed repositories that got order of changeset revisions completely different from that of manifest
390
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194 int x = manifestLast;
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195 manifestLast = manifestFirst;
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196 manifestFirst = x;
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197 }
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198 content.iterate(manifestFirst, manifestLast, true, new ManifestParser(inspector, encodingHelper));
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199 }
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200
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201 /**
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202 * "Sparse" iteration of the manifest, more effective than accessing revisions one by one.
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203 * <p> Inspector is invoked for each changeset revision supplied, even when there's no manifest
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204 * revision associated with a changeset (@see {@link #walk(int, int, Inspector)} for more details when it happens). Order inspector
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205 * gets invoked doesn't resemble order of changeset revisions supplied, manifest revisions are reported in the order they appear
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206 * in manifest revlog (with exception of changesets with missing manifest that may be reported in any order).
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207 *
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208 * @param inspector manifest revision visitor, can't be <code>null</code>
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209 * @param revisionIndexes local indexes of changesets to visit, non-<code>null</code>
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210 * @throws HgInvalidRevisionException if argument specifies non-existent revision index
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211 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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212 */
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213 public void walk(final Inspector inspector, int... revisionIndexes) throws HgInvalidRevisionException, HgInvalidControlFileException {
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214 if (inspector == null || revisionIndexes == null) {
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215 throw new IllegalArgumentException();
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216 }
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217 int[] manifestRevs = toManifestRevisionIndexes(revisionIndexes, inspector);
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218 content.iterate(manifestRevs, true, new ManifestParser(inspector, encodingHelper));
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219 }
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220
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221 //
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222 /**
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223 * Tells manifest revision number that corresponds to the given changeset. May return {@link HgRepository#BAD_REVISION}
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224 * if changeset has no associated manifest (cset records NULL nodeid for manifest).
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225 * @return manifest revision index, non-negative, or {@link HgRepository#BAD_REVISION}.
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226 * @throws HgInvalidRevisionException if method argument specifies non-existent revision index
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227 * @throws IllegalArgumentException if argument is not a revision index
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228 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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229 */
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230 /*package-local*/ int fromChangelog(int changesetRevisionIndex) throws HgInvalidRevisionException, HgInvalidControlFileException {
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231 if (HgInternals.wrongRevisionIndex(changesetRevisionIndex)) {
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232 throw new IllegalArgumentException(String.valueOf(changesetRevisionIndex));
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233 }
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234 if (changesetRevisionIndex == HgRepository.WORKING_COPY || changesetRevisionIndex == HgRepository.BAD_REVISION) {
257
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235 throw new IllegalArgumentException("Can't use constants like WORKING_COPY or BAD_REVISION");
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236 }
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237 // revisionNumber == TIP is processed by RevisionMapper
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238 if (revisionMap == null) {
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239 revisionMap = new RevisionMapper(getRepo());
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240 content.iterate(0, TIP, false, revisionMap);
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241 }
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242 return revisionMap.at(changesetRevisionIndex);
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243 }
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244
232
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245 /**
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246 * Extracts file revision as it was known at the time of given changeset.
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247 * For more thorough details about file at specific changeset, use {@link HgChangesetFileSneaker}.
232
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248 *
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249 * @see HgChangesetFileSneaker
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250 * @param changelogRevisionIndex local changeset index
232
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251 * @param file path to file in question
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252 * @return file revision or <code>null</code> if manifest at specified revision doesn't list such file
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253 * @throws HgInvalidRevisionException if method argument specifies non-existent revision index
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254 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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255 */
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256 public Nodeid getFileRevision(int changelogRevisionIndex, final Path file) throws HgInvalidRevisionException, HgInvalidControlFileException {
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257 // there's no need for HgDataFile to own this method, or get a delegate
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258 // as most of HgDataFile API is using file revision indexes, and there's easy step from file revision index to
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259 // both file revision and changeset revision index. But there's no easy way to go from changesetRevisionIndex to
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260 // file revision (the task this method solves), exept for HgFileInformer
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261 // I feel methods dealing with changeset indexes shall be more exposed in HgChangelog and HgManifest API.
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262 return getFileRevisions(file, changelogRevisionIndex).get(changelogRevisionIndex);
326
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263 }
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264
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265 // XXX package-local or better API
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266 @Experimental(reason="Map as return value isn't that good")
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267 public Map<Integer, Nodeid> getFileRevisions(final Path file, int... changelogRevisionIndexes) throws HgInvalidRevisionException, HgInvalidControlFileException {
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268 // FIXME in fact, walk(Inspectr, path, int[]) might be better alternative than get()
403
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269 // TODO need tests
390
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270 int[] manifestRevisionIndexes = toManifestRevisionIndexes(changelogRevisionIndexes, null);
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271 IntMap<Nodeid> resMap = new IntMap<Nodeid>(changelogRevisionIndexes.length);
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272 content.iterate(manifestRevisionIndexes, true, new FileLookupInspector(encodingHelper, file, resMap, null));
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273 // IntMap to HashMap,
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274 HashMap<Integer,Nodeid> rv = new HashMap<Integer, Nodeid>();
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275 resMap.fill(rv);
326
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276 return rv;
232
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277 }
326
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278
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279 /**
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280 * Extract file {@link Flags flags} as they were recorded in appropriate manifest version.
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281 *
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282 * @see HgDataFile#getFlags(int)
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283 * @param changesetRevIndex changeset revision index
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284 * @param file path to look up
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285 * @return one of predefined enum values, or <code>null</code> if file was not known in the specified revision
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286 * FIXME EXCEPTIONS
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287 * @throws HgInvalidControlFileException
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288 * @throws HgInvalidRevisionException
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289 */
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290 public Flags getFileFlags(int changesetRevIndex, Path file) throws HgInvalidRevisionException, HgInvalidControlFileException {
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291 int manifestRevIdx = fromChangelog(changesetRevIndex);
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292 IntMap<Flags> resMap = new IntMap<Flags>(2);
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293 content.iterate(manifestRevIdx, manifestRevIdx, true, new FileLookupInspector(encodingHelper, file, null, resMap));
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294 return resMap.get(changesetRevIndex);
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295 }
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296
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297
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298 /**
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299 * @param changelogRevisionIndexes non-null
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300 * @param inspector may be null if reporting of missing manifests is not needed
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301 * @throws HgInvalidRevisionException if arguments specify non-existent revision index
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302 * @throws IllegalArgumentException if any index argument is not a revision index
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303 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
390
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304 */
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305 private int[] toManifestRevisionIndexes(int[] changelogRevisionIndexes, Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
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306 int[] manifestRevs = new int[changelogRevisionIndexes.length];
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307 boolean needsSort = false;
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308 int j = 0;
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309 for (int i = 0; i < changelogRevisionIndexes.length; i++) {
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310 final int manifestRevisionIndex = fromChangelog(changelogRevisionIndexes[i]);
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311 if (manifestRevisionIndex == BAD_REVISION) {
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312 if (inspector != null) {
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313 inspector.begin(BAD_REVISION, NULL, changelogRevisionIndexes[i]);
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314 inspector.end(BAD_REVISION);
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315 }
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316 // othrwise, ignore changeset without manifest
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317 } else {
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318 manifestRevs[j] = manifestRevisionIndex;
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319 if (j > 0 && manifestRevs[j-1] > manifestRevisionIndex) {
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320 needsSort = true;
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321 }
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322 j++;
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323 }
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324 }
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325 if (needsSort) {
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326 Arrays.sort(manifestRevs, 0, j);
326
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327 }
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328 if (j == manifestRevs.length) {
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329 return manifestRevs;
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330 } else {
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331 int[] rv = new int[j];
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332 //Arrays.copyOfRange
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333 System.arraycopy(manifestRevs, 0, rv, 0, j);
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334 return rv;
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335 }
326
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336 }
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337
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338 public interface Inspector {
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339 boolean begin(int mainfestRevision, Nodeid nid, int changelogRevision);
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340 /**
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341 * @deprecated switch to {@link Inspector2#next(Nodeid, Path, Flags)}
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342 */
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343 @Deprecated
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344 boolean next(Nodeid nid, String fname, String flags);
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345 boolean end(int manifestRevision);
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346 }
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347
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348 @Experimental(reason="Explore Path alternative for filenames and enum for flags")
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349 public interface Inspector2 extends Inspector {
415
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350 /**
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351 * @param nid file revision
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352 * @param fname file name
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353 * @param flags one of {@link HgManifest.Flags} constants, not <code>null</code>
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354 * @return <code>true</code> to continue iteration, <code>false</code> to stop
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355 */
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356 boolean next(Nodeid nid, Path fname, Flags flags);
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357 }
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358
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359 /**
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360 * When Pool uses Strings directly,
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361 * ManifestParser creates new String instance with new char[] value, and does byte->char conversion.
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362 * For cpython repo, walk(0..10k), there are over 16 million filenames, of them only 3020 unique.
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363 * This means there are 15.9 million useless char[] instances and byte->char conversions
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364 *
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365 * When String (Path) is wrapped into {@link PathProxy}, there's extra overhead of byte[] representation
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366 * of the String, but these are only for unique Strings (Paths) (3020 in the example above). Besides, I save
268
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367 * useless char[] and byte->char conversions.
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368 */
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369 private static class PathProxy {
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370 private byte[] data;
268
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371 private int start;
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372 private final int hash, length;
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373 private Path result;
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374 private final EncodingHelper encHelper;
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375
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376 public PathProxy(byte[] data, int start, int length, EncodingHelper eh) {
267
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377 this.data = data;
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378 this.start = start;
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379 this.length = length;
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380 this.encHelper = eh;
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381
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382 // copy from String.hashCode(). In fact, not necessarily match result of String(data).hashCode
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383 // just need some nice algorithm here
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384 int h = 0;
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385 byte[] d = data;
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386 for (int i = 0, off = start, len = length; i < len; i++) {
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387 h = 31 * h + d[off++];
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388 }
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389 hash = h;
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390 }
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391
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392 @Override
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393 public boolean equals(Object obj) {
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394 if (false == obj instanceof PathProxy) {
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395 return false;
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396 }
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397 PathProxy o = (PathProxy) obj;
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398 if (o.result != null && result != null) {
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399 return result.equals(o.result);
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400 }
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401 if (o.length != length || o.hash != hash) {
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402 return false;
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403 }
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404 for (int i = 0, x = o.start, y = start; i < length; i++) {
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405 if (o.data[x++] != data[y++]) {
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406 return false;
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407 }
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408 }
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409 return true;
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410 }
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411 @Override
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412 public int hashCode() {
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413 return hash;
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414 }
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415
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416 public Path freeze() {
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417 if (result == null) {
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418 result = Path.create(encHelper.fromManifest(data, start, length));
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419 // release reference to bigger data array, make a copy of relevant part only
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420 // use original bytes, not those from String above to avoid cache misses due to different encodings
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421 byte[] d = new byte[length];
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422 System.arraycopy(data, start, d, 0, length);
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423 data = d;
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424 start = 0;
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425 }
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426 return result;
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427 }
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428 }
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429
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430 private static class ManifestParser implements RevlogStream.Inspector, Lifecycle {
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431 private final Inspector inspector;
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432 private final Inspector2 inspector2;
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433 private Pool2<Nodeid> nodeidPool, thisRevPool;
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434 private final Pool2<PathProxy> fnamePool;
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435 private byte[] nodeidLookupBuffer = new byte[20]; // get reassigned each time new Nodeid is added to pool
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436 private final ProgressSupport progressHelper;
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437 private IterateControlMediator iterateControl;
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438 private final EncodingHelper encHelper;
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439
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440 public ManifestParser(Inspector delegate, EncodingHelper eh) {
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441 assert delegate != null;
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442 inspector = delegate;
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443 inspector2 = delegate instanceof Inspector2 ? (Inspector2) delegate : null;
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444 encHelper = eh;
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445 nodeidPool = new Pool2<Nodeid>();
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446 fnamePool = new Pool2<PathProxy>();
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447 thisRevPool = new Pool2<Nodeid>();
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diff changeset
448 progressHelper = ProgressSupport.Factory.get(delegate);
196
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diff changeset
449 }
268
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
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diff changeset
450
366
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diff changeset
451 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) throws HgException {
196
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diff changeset
452 try {
312
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diff changeset
453 if (!inspector.begin(revisionNumber, new Nodeid(nodeid, true), linkRevision)) {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
454 iterateControl.stop();
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diff changeset
455 return;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
456 }
372
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
457 if (!da.isEmpty()) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
458 // although unlikely, manifest entry may be empty, when all files have been deleted from the repository
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
459 Path fname = null;
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diff changeset
460 Flags flags = null;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
461 Nodeid nid = null;
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diff changeset
462 int i;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
463 byte[] data = da.byteArray();
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
464 for (i = 0; i < actualLen; i++) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
465 int x = i;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
466 for( ; data[i] != '\n' && i < actualLen; i++) {
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diff changeset
467 if (fname == null && data[i] == 0) {
412
63c5a9d7ca3f Follow-up for Issue 29: unify path translation for manifest and dirstate
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diff changeset
468 PathProxy px = fnamePool.unify(new PathProxy(data, x, i - x, encHelper));
372
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diff changeset
469 // if (cached = fnamePool.unify(px))== px then cacheMiss, else cacheHit
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diff changeset
470 // cpython 0..10k: hits: 15 989 152, misses: 3020
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diff changeset
471 fname = px.freeze();
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diff changeset
472 x = i+1;
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diff changeset
473 }
196
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diff changeset
474 }
372
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diff changeset
475 if (i < actualLen) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
476 assert data[i] == '\n';
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
477 int nodeidLen = i - x < 40 ? i-x : 40; // if > 40, there are flags
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
478 DigestHelper.ascii2bin(data, x, nodeidLen, nodeidLookupBuffer); // ignore return value as it's unlikely to have NULL in manifest
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
479 nid = new Nodeid(nodeidLookupBuffer, false); // this Nodeid is for pool lookup only, mock object
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diff changeset
480 Nodeid cached = nodeidPool.unify(nid);
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
481 if (cached == nid) {
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diff changeset
482 // buffer now belongs to the cached nodeid
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
483 nodeidLookupBuffer = new byte[20];
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
484 } else {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
485 nid = cached; // use existing version, discard the lookup object
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
486 } // for cpython 0..10k, cache hits are 15 973 301, vs 18871 misses.
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
487 thisRevPool.record(nid); // memorize revision for the next iteration.
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
488 if (nodeidLen + x < i) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
489 // 'x' and 'l' for executable bits and symlinks?
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
490 // hg --debug manifest shows 644 for each regular file in my repo
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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parents: 368
diff changeset
491 // for cpython 0..10k, there are 4361062 flag checks, and there's only 1 unique flag
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
492 flags = Flags.parse(data, x + nodeidLen, i-x-nodeidLen);
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
493 } else {
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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diff changeset
494 flags = Flags.RegularFile;
372
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diff changeset
495 }
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
496 boolean good2go;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
497 if (inspector2 == null) {
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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diff changeset
498 String flagString = flags == Flags.RegularFile ? null : flags.nativeString();
372
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diff changeset
499 good2go = inspector.next(nid, fname.toString(), flagString);
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
500 } else {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
501 good2go = inspector2.next(nid, fname, flags);
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
502 }
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
503 if (!good2go) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
504 iterateControl.stop();
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
505 return;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
506 }
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
507 }
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
508 nid = null;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
509 fname = null;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
510 flags = null;
196
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diff changeset
511 }
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diff changeset
512 }
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
513 if (!inspector.end(revisionNumber)) {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
514 iterateControl.stop();
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diff changeset
515 return;
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diff changeset
516 }
262
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
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diff changeset
517 //
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
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diff changeset
518 // keep only actual file revisions, found at this version
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diff changeset
519 // (next manifest is likely to refer to most of them, although in specific cases
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
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diff changeset
520 // like commit in another branch a lot may be useless)
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
521 nodeidPool.clear();
304
85b8efde5586 Use memory-friendly set implementation to canonicalize filenames and nodeids
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parents: 300
diff changeset
522 Pool2<Nodeid> t = nodeidPool;
262
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
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diff changeset
523 nodeidPool = thisRevPool;
264
6bb5e7ed051a Optimize memory usage (reduce number of objects instantiated) when pooling file names and nodeids during manifest parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 262
diff changeset
524 thisRevPool = t;
313
c1e3c18fd2f2 Test manifest cancellation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
525 iterateControl.checkCancelled();
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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parents: 304
diff changeset
526 progressHelper.worked(1);
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
527 } catch (IOException ex) {
366
189dc6dc1c3e Use exceptions to expose errors reading mercurial data
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diff changeset
528 throw new HgException(ex);
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
529 }
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
530 }
312
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diff changeset
531
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
532 public void start(int count, Callback callback, Object token) {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
533 CancelSupport cs = CancelSupport.Factory.get(inspector, null);
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
534 iterateControl = new IterateControlMediator(cs, callback);
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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parents: 304
diff changeset
535 progressHelper.start(count);
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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parents: 304
diff changeset
536 }
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
537
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
538 public void finish(Object token) {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
539 progressHelper.done();
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
540 }
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
541 }
218
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
542
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
543 private static class RevisionMapper implements RevlogStream.Inspector, Lifecycle {
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
544
403
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diff changeset
545 private final int changelogRevisionCount;
218
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
546 private int[] changelog2manifest;
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
547 private final HgRepository repo;
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
548
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
549 public RevisionMapper(HgRepository hgRepo) {
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
550 repo = hgRepo;
403
2747b0723867 FIXMEs: work on exceptions and javadoc
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diff changeset
551 changelogRevisionCount = repo.getChangelog().getRevisionCount();
218
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
552 }
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
553
403
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diff changeset
554 /**
2747b0723867 FIXMEs: work on exceptions and javadoc
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diff changeset
555 * Get index of manifest revision that corresponds to specified changeset
2747b0723867 FIXMEs: work on exceptions and javadoc
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diff changeset
556 * @param changesetRevisionIndex non-negative index of changelog revision, or {@link HgRepository#TIP}
2747b0723867 FIXMEs: work on exceptions and javadoc
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diff changeset
557 * @return index of manifest revision, or {@link HgRepository#BAD_REVISION} if changeset doesn't reference a valid manifest
2747b0723867 FIXMEs: work on exceptions and javadoc
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diff changeset
558 * @throws HgInvalidRevisionException if method argument specifies non-existent revision index
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diff changeset
559 */
2747b0723867 FIXMEs: work on exceptions and javadoc
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diff changeset
560 public int at(int changesetRevisionIndex) throws HgInvalidRevisionException {
2747b0723867 FIXMEs: work on exceptions and javadoc
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parents: 390
diff changeset
561 if (changesetRevisionIndex == TIP) {
2747b0723867 FIXMEs: work on exceptions and javadoc
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diff changeset
562 changesetRevisionIndex = changelogRevisionCount - 1;
2747b0723867 FIXMEs: work on exceptions and javadoc
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diff changeset
563 }
2747b0723867 FIXMEs: work on exceptions and javadoc
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diff changeset
564 if (changesetRevisionIndex >= changelogRevisionCount) {
2747b0723867 FIXMEs: work on exceptions and javadoc
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diff changeset
565 throw new HgInvalidRevisionException(changesetRevisionIndex);
257
f39fb6b3cc76 Handle revision constants correctly
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diff changeset
566 }
218
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
567 if (changelog2manifest != null) {
403
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568 return changelog2manifest[changesetRevisionIndex];
218
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569 }
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570 return changesetRevisionIndex;
218
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571 }
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572
324
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573 // XXX likely can be replaced with Revlog.RevisionInspector
218
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574 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) {
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575 if (changelog2manifest != null) {
220
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576 // next assertion is not an error, rather assumption check, which is too development-related to be explicit exception -
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577 // I just wonder if there are manifests that have two entries pointing to single changeset. It seems unrealistic, though -
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578 // changeset records one and only one manifest nodeid
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579 assert changelog2manifest[linkRevision] == BAD_REVISION : String.format("revision:%d, link:%d, already linked to revision:%d", revisionNumber, linkRevision, changelog2manifest[linkRevision]);
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580 changelog2manifest[linkRevision] = revisionNumber;
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581 } else {
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582 if (revisionNumber != linkRevision) {
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583 changelog2manifest = new int[changelogRevisionCount];
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584 Arrays.fill(changelog2manifest, BAD_REVISION);
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585 for (int i = 0; i < revisionNumber; changelog2manifest[i] = i, i++)
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586 ;
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587 changelog2manifest[linkRevision] = revisionNumber;
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588 }
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589 }
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590 }
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591
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592 public void start(int count, Callback callback, Object token) {
403
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593 if (count != changelogRevisionCount) {
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594 assert count < changelogRevisionCount; // no idea what to do if manifest has more revisions than changelog
218
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595 // the way how manifest may contain more revisions than changelog, as I can imagine, is a result of
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596 // some kind of an import tool (e.g. from SVN or CVS), that creates manifest and changelog independently.
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diff changeset
597 // Note, it's pure guess, I didn't see such repository yet (although the way manifest revisions
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598 // in cpython repo are numbered makes me think aforementioned way)
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599 changelog2manifest = new int[changelogRevisionCount];
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600 Arrays.fill(changelog2manifest, BAD_REVISION);
218
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601 }
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602 }
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diff changeset
603
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604 public void finish(Object token) {
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605 if (changelog2manifest == null) {
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606 return;
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607 }
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608 // I assume there'd be not too many revisions we don't know manifest of
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609 ArrayList<Integer> undefinedChangelogRevision = new ArrayList<Integer>();
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610 for (int i = 0; i < changelog2manifest.length; i++) {
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611 if (changelog2manifest[i] == BAD_REVISION) {
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612 undefinedChangelogRevision.add(i);
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613 }
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614 }
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615 for (int u : undefinedChangelogRevision) {
354
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616 try {
366
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617 Nodeid manifest = repo.getChangelog().range(u, u).get(0).manifest();
390
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618 // TODO calculate those missing effectively (e.g. cache and sort nodeids to speed lookup
366
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619 // right away in the #next (may refactor ParentWalker's sequential and sorted into dedicated helper and reuse here)
385
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620 if (manifest.isNull()) {
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621 repo.getContext().getLog().warn(getClass(), "Changeset %d has no associated manifest entry", u);
390
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diff changeset
622 // keep -1 in the changelog2manifest map.
385
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623 } else {
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624 changelog2manifest[u] = repo.getManifest().getRevisionIndex(manifest);
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625 }
354
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626 } catch (HgInvalidControlFileException ex) {
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627 // FIXME need to propagate the error up to client
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628 repo.getContext().getLog().error(getClass(), ex, null);
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629 }
218
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630 }
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631 }
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632 }
415
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633
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634 /**
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635 * Look up specified file in possibly multiple manifest revisions, collect file revision and flags.
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636 */
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637 private static class FileLookupInspector implements RevlogStream.Inspector {
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638
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639 private final byte[] filenameAsBytes;
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640 private final IntMap<Nodeid> csetIndex2FileRev;
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641 private final IntMap<Flags> csetIndex2Flags;
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642
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643 public FileLookupInspector(EncodingHelper eh, Path fileToLookUp, IntMap<Nodeid> csetIndex2FileRevMap, IntMap<Flags> csetIndex2FlagsMap) {
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644 assert fileToLookUp != null;
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645 // need at least one map for the inspector to make any sense
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646 assert csetIndex2FileRevMap != null || csetIndex2FlagsMap != null;
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647 csetIndex2FileRev = csetIndex2FileRevMap;
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648 csetIndex2Flags = csetIndex2FlagsMap;
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649 filenameAsBytes = eh.toManifest(fileToLookUp.toString());
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650 }
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651
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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652 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) throws HgException {
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653 ByteArrayOutputStream bos = new ByteArrayOutputStream();
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diff changeset
654 try {
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655 byte b;
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656 while (!data.isEmpty() && (b = data.readByte()) != '\n') {
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657 if (b != 0) {
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658 bos.write(b);
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659 } else {
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660 byte[] byteArray = bos.toByteArray();
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661 bos.reset();
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662 if (Arrays.equals(filenameAsBytes, byteArray)) {
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663 if (csetIndex2FileRev != null) {
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664 byte[] nid = new byte[40];
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665 data.readBytes(nid, 0, 40);
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666 csetIndex2FileRev.put(linkRevision, Nodeid.fromAscii(nid, 0, 40));
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667 } else {
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diff changeset
668 data.skip(40);
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669 }
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670 if (csetIndex2Flags != null) {
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671 while (!data.isEmpty() && (b = data.readByte()) != '\n') {
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672 bos.write(b);
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673 }
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674 Flags flags;
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675 if (bos.size() == 0) {
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676 flags = Flags.RegularFile;
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diff changeset
677 } else {
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678 flags = Flags.parse(bos.toByteArray(), 0, bos.size());
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679 }
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680 csetIndex2Flags.put(linkRevision, flags);
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681 }
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682 break;
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683 } else {
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684 data.skip(40);
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685 }
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686 // else skip to the end of line
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687 while (!data.isEmpty() && (b = data.readByte()) != '\n')
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688 ;
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689 }
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690 }
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691 } catch (IOException ex) {
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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692 throw new HgException(ex); // FIXME EXCEPTIONS
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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693 }
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694 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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695 }
2
08db726a0fb7 Shaping out low-level Hg structures
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696 }