annotate src/org/tmatesoft/hg/repo/HgManifest.java @ 597:c895b5556937

Wrap manifest revision map completion into single file access
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 03 May 2013 14:10:40 +0200
parents 47dfa0ec7e35
children d29d9dc6c128
rev   line source
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1 /*
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2 * Copyright (c) 2010-2013 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.repo;
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18
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6952d9ce97f1 Handle missing manifest revision case (brought up with Issue 23), do my best to report missing manifests when walking few manifest revisions
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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.*;
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21 import static org.tmatesoft.hg.util.LogFacility.Severity.Info;
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22
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23 import java.io.IOException;
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24 import java.util.Arrays;
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25
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ccd7d25e5aea New and better name for HgFileInformer - HgChangesetFileSneaker. Explain (comments) ties between HgManifest, HgDataFile, HgChangesetFileSneaker and reasons for method placement
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26 import org.tmatesoft.hg.core.HgChangesetFileSneaker;
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27 import org.tmatesoft.hg.core.Nodeid;
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28 import org.tmatesoft.hg.internal.ByteVector;
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29 import org.tmatesoft.hg.internal.Callback;
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30 import org.tmatesoft.hg.internal.DataAccess;
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31 import org.tmatesoft.hg.internal.DigestHelper;
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32 import org.tmatesoft.hg.internal.EncodingHelper;
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33 import org.tmatesoft.hg.internal.IdentityPool;
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34 import org.tmatesoft.hg.internal.IntMap;
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35 import org.tmatesoft.hg.internal.IntVector;
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36 import org.tmatesoft.hg.internal.IterateControlMediator;
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37 import org.tmatesoft.hg.internal.Lifecycle;
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38 import org.tmatesoft.hg.internal.RevlogStream;
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39 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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40 import org.tmatesoft.hg.util.CancelSupport;
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41 import org.tmatesoft.hg.util.LogFacility.Severity;
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42 import org.tmatesoft.hg.util.Path;
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43 import org.tmatesoft.hg.util.ProgressSupport;
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44
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45
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46 /**
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47 * Representation of Mercurial manifest file (list of file names and their revisions in a particular changeset)
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48 *
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49 * @see http://mercurial.selenic.com/wiki/Manifest
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50 * @author Artem Tikhomirov
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51 * @author TMate Software Ltd.
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52 */
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53 public final class HgManifest extends Revlog {
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54 private RevisionMapper revisionMap;
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55 private final EncodingHelper encodingHelper;
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56 private final Path.Source pathFactory;
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57
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58 /**
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59 * File flags recorded in manifest
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60 */
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61 public enum Flags {
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62 /**
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63 * Executable bit set
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64 */
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65 Exec,
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66 /**
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67 * Symbolic link
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68 */
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69 Link,
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70 /**
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71 * Regular file
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72 */
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73 RegularFile;
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74
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75 static Flags parse(String flags) {
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76 if ("x".equalsIgnoreCase(flags)) {
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77 return Exec;
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78 }
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79 if ("l".equalsIgnoreCase(flags)) {
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80 return Link;
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81 }
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82 if (flags == null) {
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83 return RegularFile;
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84 }
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85 throw new IllegalStateException(flags);
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86 }
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87
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88 static Flags parse(byte[] data, int start, int length) {
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89 if (length == 0) {
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90 return RegularFile;
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91 }
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92 if (length == 1) {
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93 if (data[start] == 'x') {
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94 return Exec;
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95 }
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96 if (data[start] == 'l') {
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97 return Link;
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98 }
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99 // FALL THROUGH
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100 }
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101 throw new IllegalStateException(new String(data, start, length));
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102 }
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103
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104 String nativeString() {
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105 if (this == Exec) {
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106 return "x";
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107 }
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108 if (this == Link) {
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109 return "l";
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110 }
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111 if (this == RegularFile) {
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112 return "";
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113 }
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114 throw new IllegalStateException(toString());
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115 }
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116
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117 public int fsMode() {
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118 if (this == Exec) {
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119 return 0755;
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120 }
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121 return 0644;
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122 }
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123 }
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124
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125 /*package-local*/ HgManifest(HgRepository hgRepo, RevlogStream content, EncodingHelper eh) {
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126 super(hgRepo, content);
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127 encodingHelper = eh;
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128 pathFactory = hgRepo.getSessionContext().getPathFactory();
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129 }
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130
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131 /**
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132 * Walks manifest revisions that correspond to specified range of changesets. The order in which manifest versions get reported
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133 * to the inspector corresponds to physical order of manifest revisions, not that of changesets (with few exceptions as noted below).
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134 * That is, for cset-manifest revision pairs:
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135 * <pre>
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136 * 3 8
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137 * 4 7
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138 * 5 9
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139 * </pre>
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140 * call <code>walk(3,5, insp)</code> would yield (4,7), (3,8) and (5,9) to the inspector;
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141 * different order of arguments, <code>walk(5, 3, insp)</code>, makes no difference.
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142 *
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143 * <p>Physical layout of mercurial files (revlog) doesn't impose any restriction on whether manifest and changeset revisions shall go
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144 * 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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145 * as corresponding manifest revision. This situation is deemed exceptional now and what would <code>inspector</code> get depends on whether
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146 * <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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147 * <code>[start..end]</code>. Implementation does it best to report empty manifests
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148 * (<code>Inspector.begin(HgRepository.NO_REVISION, NULL, csetRevIndex);</code>
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149 * followed immediately by <code>Inspector.end(HgRepository.NO_REVISION)</code>
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150 * when <code>start</code> and/or <code>end</code> point to changeset with no associated
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151 * manifest revision. However, if changeset-manifest revision pairs look like:
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152 * <pre>
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153 * 3 8
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154 * 4 -1 (cset records null revision for manifest)
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155 * 5 9
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156 * </pre>
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157 * 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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158 * <code>Inspector.begin(); Inspector.end()</code> call pair.
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159 *
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160 * @see HgRepository#NO_REVISION
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161 * @param start changelog (not manifest!) revision to begin with
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162 * @param end changelog (not manifest!) revision to stop, inclusive.
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163 * @param inspector manifest revision visitor, can't be <code>null</code>
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164 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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165 * @throws IllegalArgumentException if inspector callback is <code>null</code>
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166 */
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167 public void walk(int start, int end, final Inspector inspector) throws HgRuntimeException, IllegalArgumentException {
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168 if (inspector == null) {
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169 throw new IllegalArgumentException();
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170 }
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171 final int csetFirst = start <= end ? start : end, csetLast = start > end ? start : end;
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172 int manifestFirst, manifestLast, i = 0;
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173 do {
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174 manifestFirst = fromChangelog(csetFirst+i);
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175 if (manifestFirst == BAD_REVISION) {
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176 inspector.begin(NO_REVISION, NULL, csetFirst+i);
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177 inspector.end(NO_REVISION);
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178 }
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179 i++;
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180 } while (manifestFirst == BAD_REVISION && csetFirst+i <= csetLast);
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181 if (manifestFirst == BAD_REVISION) {
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182 getRepo().getSessionContext().getLog().dump(getClass(), Info, "None of changesets [%d..%d] have associated manifest revision", csetFirst, csetLast);
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183 // we ran through all revisions in [start..end] and none of them had manifest.
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184 // we reported that to inspector and proceeding is done now.
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185 return;
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186 }
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187 i = 0;
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188 do {
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189 manifestLast = fromChangelog(csetLast-i);
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190 if (manifestLast == BAD_REVISION) {
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191 inspector.begin(NO_REVISION, NULL, csetLast-i);
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192 inspector.end(NO_REVISION);
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193 }
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194 i++;
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195 } while (manifestLast == BAD_REVISION && csetLast-i >= csetFirst);
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196 if (manifestLast == BAD_REVISION) {
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197 // hmm, manifestFirst != BAD_REVISION here, hence there's i from [csetFirst..csetLast] for which manifest entry exists,
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198 // and thus it's impossible to run into manifestLast == BAD_REVISION. Nevertheless, never hurts to check.
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199 throw new HgInvalidStateException(String.format("Manifest %d-%d(!) for cset range [%d..%d] ", manifestFirst, manifestLast, csetFirst, csetLast));
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200 }
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201 if (manifestLast < manifestFirst) {
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202 // there are tool-constructed repositories that got order of changeset revisions completely different from that of manifest
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203 int x = manifestLast;
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204 manifestLast = manifestFirst;
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205 manifestFirst = x;
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206 }
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207 content.iterate(manifestFirst, manifestLast, true, new ManifestParser(inspector));
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208 }
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209
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210 /**
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211 * "Sparse" iteration of the manifest, more effective than accessing revisions one by one.
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212 * <p> Inspector is invoked for each changeset revision supplied, even when there's no manifest
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213 * revision associated with a changeset (@see {@link #walk(int, int, Inspector)} for more details when it happens). Order inspector
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214 * gets invoked doesn't resemble order of changeset revisions supplied, manifest revisions are reported in the order they appear
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215 * in manifest revlog (with exception of changesets with missing manifest that may be reported in any order).
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216 *
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217 * @param inspector manifest revision visitor, can't be <code>null</code>
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218 * @param revisionIndexes local indexes of changesets to visit, non-<code>null</code>
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219 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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220 * @throws InvalidArgumentException if supplied arguments are <code>null</code>s
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221 */
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222 public void walk(final Inspector inspector, int... revisionIndexes) throws HgRuntimeException, IllegalArgumentException {
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223 if (inspector == null || revisionIndexes == null) {
254
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224 throw new IllegalArgumentException();
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225 }
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226 int[] manifestRevs = toManifestRevisionIndexes(revisionIndexes, inspector);
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227 content.iterate(manifestRevs, true, new ManifestParser(inspector));
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228 }
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229
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230 //
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231 /**
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232 * Tells manifest revision number that corresponds to the given changeset. May return {@link HgRepository#BAD_REVISION}
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233 * if changeset has no associated manifest (cset records NULL nodeid for manifest).
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234 * @return manifest revision index, non-negative, or {@link HgRepository#BAD_REVISION}.
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235 * @throws HgInvalidRevisionException if method argument specifies non-existent revision index
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236 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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237 */
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238 /*package-local*/ int fromChangelog(int changesetRevisionIndex) throws HgInvalidRevisionException, HgInvalidControlFileException {
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239 if (HgInternals.wrongRevisionIndex(changesetRevisionIndex)) {
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240 throw new HgInvalidRevisionException(changesetRevisionIndex);
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241 }
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242 if (changesetRevisionIndex == HgRepository.WORKING_COPY || changesetRevisionIndex == HgRepository.BAD_REVISION) {
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243 throw new HgInvalidRevisionException("Can't use constants like WORKING_COPY or BAD_REVISION", null, changesetRevisionIndex);
257
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244 }
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245 // revisionNumber == TIP is processed by RevisionMapper
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246 if (revisionMap == null) {
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247 revisionMap = new RevisionMapper(getRepo());
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248 content.iterate(0, TIP, false, revisionMap);
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249 }
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250 return revisionMap.at(changesetRevisionIndex);
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251 }
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252
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253 /**
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254 * Extracts file revision as it was known at the time of given changeset.
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255 * <p>For more thorough details about file at specific changeset, use {@link HgChangesetFileSneaker}.
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256 * <p>To visit few changesets for the same file, use {@link #walkFileRevisions(Path, Inspector, int...)}
232
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257 *
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258 * @see #walkFileRevisions(Path, Inspector, int...)
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259 * @see HgChangesetFileSneaker
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260 * @param changelogRevisionIndex local changeset index
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261 * @param file path to file in question
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262 * @return file revision or <code>null</code> if manifest at specified revision doesn't list such file
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263 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
232
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264 */
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265 public Nodeid getFileRevision(int changelogRevisionIndex, final Path file) throws HgInvalidRevisionException, HgInvalidControlFileException {
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266 // there's no need for HgDataFile to own this method, or get a delegate
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267 // as most of HgDataFile API is using file revision indexes, and there's easy step from file revision index to
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268 // both file revision and changeset revision index. But there's no easy way to go from changesetRevisionIndex to
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269 // file revision (the task this method solves), except for HgFileInformer
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270 // I feel methods dealing with changeset indexes shall be more exposed in HgChangelog and HgManifest API.
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271 // TODO need tests (e.g. pass TIP here to see resMap.get(-1) doesn't fail)
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272 int manifestRevIndex = fromChangelog(changelogRevisionIndex);
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273 if (manifestRevIndex == BAD_REVISION) {
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274 return null;
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275 }
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276 IntMap<Nodeid> resMap = new IntMap<Nodeid>(3);
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277 FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, resMap, null);
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278 parser.walk(manifestRevIndex, content);
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279 assert resMap.size() <= 1; // size() == 0 if file wasn't found
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280 // can't use changelogRevisionIndex as key - it might have been TIP
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281 return resMap.size() == 0 ? null : resMap.get(resMap.firstKey());
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282 }
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283
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284 /**
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285 * Visit file revisions as they were recorded at the time of given changesets. Same file revision may be reported as many times as
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286 * there are changesets that refer to that revision. Both {@link Inspector#begin(int, Nodeid, int)} and {@link Inspector#end(int)}
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287 * with appropriate values are invoked around {@link Inspector#next(Nodeid, Path, Flags)} call for the supplied file
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288 *
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289 * <p>NOTE, this method doesn't respect return values from callback (i.e. to stop iteration), as it's lookup of a single file
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290 * and canceling it seems superfluous. However, this may change in future and it's recommended to return <code>true</code> from
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291 * all {@link Inspector} methods.
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292 *
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293 * @see #getFileRevision(int, Path)
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294 * @param file path of interest
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295 * @param inspector callback to receive details about selected file
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296 * @param changelogRevisionIndexes changeset indexes to visit
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297 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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298 */
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299 public void walkFileRevisions(Path file, Inspector inspector, int... changelogRevisionIndexes) throws HgRuntimeException {
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300 if (file == null || inspector == null || changelogRevisionIndexes == null) {
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301 throw new IllegalArgumentException();
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302 }
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303 // TODO [post-1.0] need tests. There's Main#checkWalkFileRevisions that may be a starting point
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304 int[] manifestRevIndexes = toManifestRevisionIndexes(changelogRevisionIndexes, null);
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305 FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, inspector);
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306 parser.walk(manifestRevIndexes, content);
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307 }
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308
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309 /**
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310 * Extract file {@link Flags flags} as they were recorded in appropriate manifest version.
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311 *
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312 * @see HgDataFile#getFlags(int)
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313 * @param changesetRevIndex changeset revision index
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314 * @param file path to look up
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315 * @return one of predefined enum values, or <code>null</code> if file was not known in the specified revision
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316 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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317 */
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318 public Flags getFileFlags(int changesetRevIndex, Path file) throws HgInvalidRevisionException, HgInvalidControlFileException {
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319 int manifestRevIdx = fromChangelog(changesetRevIndex);
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320 IntMap<Flags> resMap = new IntMap<Flags>(2);
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321 FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, null, resMap);
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322 parser.walk(manifestRevIdx, content);
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323 assert resMap.size() <= 1; // size() == 0 if not found
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324 // can't use changesetRevIndex as key - it might have been TIP
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diff changeset
325 return resMap.size() == 0 ? null : resMap.get(resMap.firstKey());
415
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326 }
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327
326
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328
390
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329 /**
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330 * @param changelogRevisionIndexes non-null
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331 * @param inspector may be null if reporting of missing manifests is not needed
403
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332 * @throws HgInvalidRevisionException if arguments specify non-existent revision index
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333 * @throws IllegalArgumentException if any index argument is not a revision index
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334 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
390
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335 */
403
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336 private int[] toManifestRevisionIndexes(int[] changelogRevisionIndexes, Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
368
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337 int[] manifestRevs = new int[changelogRevisionIndexes.length];
326
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338 boolean needsSort = false;
390
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339 int j = 0;
367
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340 for (int i = 0; i < changelogRevisionIndexes.length; i++) {
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341 final int manifestRevisionIndex = fromChangelog(changelogRevisionIndexes[i]);
403
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342 if (manifestRevisionIndex == BAD_REVISION) {
390
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343 if (inspector != null) {
423
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344 inspector.begin(NO_REVISION, NULL, changelogRevisionIndexes[i]);
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345 inspector.end(NO_REVISION);
390
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346 }
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347 // othrwise, ignore changeset without manifest
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348 } else {
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349 manifestRevs[j] = manifestRevisionIndex;
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350 if (j > 0 && manifestRevs[j-1] > manifestRevisionIndex) {
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351 needsSort = true;
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352 }
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353 j++;
326
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354 }
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355 }
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356 if (needsSort) {
390
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357 Arrays.sort(manifestRevs, 0, j);
326
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358 }
390
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359 if (j == manifestRevs.length) {
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360 return manifestRevs;
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361 } else {
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362 int[] rv = new int[j];
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363 //Arrays.copyOfRange
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364 System.arraycopy(manifestRevs, 0, rv, 0, j);
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365 return rv;
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366 }
326
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367 }
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368
423
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369 @Callback
19
40532cdc92fc Inspector (visitor) for manifest
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370 public interface Inspector {
285
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371 /**
537
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372 * Denotes entering specific manifest revision, separate entries are
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373 * reported with subsequence {@link #next(Nodeid, Path, Flags)} calls.
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374 *
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375 * @param manifestRevisionIndex local revision index of the inspected revision
537
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376 * @param manifestRevision revision of the manifest we're about to iterate through
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377 * @param changelogRevisionIndex local revision index of changelog this manifest points to
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378 * @return <code>true</code> to continue iteration, <code>false</code> to stop
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379 */
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380 boolean begin(int manifestRevisionIndex, Nodeid manifestRevision, int changelogRevisionIndex);
537
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381
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382
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383 /**
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384 * Reports each manifest entry
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385 *
415
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386 * @param nid file revision
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387 * @param fname file name
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388 * @param flags one of {@link HgManifest.Flags} constants, not <code>null</code>
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389 * @return <code>true</code> to continue iteration, <code>false</code> to stop
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390 */
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391 boolean next(Nodeid nid, Path fname, Flags flags);
537
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392
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393 /**
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394 * Denotes leaving specific manifest revision, after all entries were reported using {@link #next(Nodeid, Path, Flags)}
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395 *
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396 * @param manifestRevisionIndex indicates manifest revision, corresponds to opening {@link #begin(int, Nodeid, int)}
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397 * @return <code>true</code> to continue iteration, <code>false</code> to stop
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398 */
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399 boolean end(int manifestRevisionIndex);
267
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400 }
424
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401
268
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402 /**
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403 * When Pool uses Strings directly,
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404 * ManifestParser creates new String instance with new char[] value, and does byte->char conversion.
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405 * For cpython repo, walk(0..10k), there are over 16 million filenames, of them only 3020 unique.
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406 * This means there are 15.9 million useless char[] instances and byte->char conversions
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407 *
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408 * When String (Path) is wrapped into {@link PathProxy}, there's extra overhead of byte[] representation
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409 * of the String, but these are only for unique Strings (Paths) (3020 in the example above). Besides, I save
268
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410 * useless char[] and byte->char conversions.
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411 */
571
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412 private final class PathProxy {
267
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413 private byte[] data;
268
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414 private int start;
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415 private final int hash, length;
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416 private Path result;
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417
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418 public PathProxy(byte[] data, int start, int length) {
267
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419 this.data = data;
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420 this.start = start;
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421 this.length = length;
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422
268
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423 // copy from String.hashCode(). In fact, not necessarily match result of String(data).hashCode
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424 // just need some nice algorithm here
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425 int h = 0;
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426 byte[] d = data;
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427 for (int i = 0, off = start, len = length; i < len; i++) {
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428 h = 31 * h + d[off++];
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429 }
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430 hash = h;
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431 }
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432
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433 @Override
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434 public boolean equals(Object obj) {
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435 if (false == obj instanceof PathProxy) {
267
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436 return false;
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diff changeset
437 }
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438 PathProxy o = (PathProxy) obj;
267
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439 if (o.result != null && result != null) {
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diff changeset
440 return result.equals(o.result);
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diff changeset
441 }
268
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
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parents: 267
diff changeset
442 if (o.length != length || o.hash != hash) {
267
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parents: 266
diff changeset
443 return false;
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parents: 266
diff changeset
444 }
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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parents: 266
diff changeset
445 for (int i = 0, x = o.start, y = start; i < length; i++) {
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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parents: 266
diff changeset
446 if (o.data[x++] != data[y++]) {
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parents: 266
diff changeset
447 return false;
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parents: 266
diff changeset
448 }
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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parents: 266
diff changeset
449 }
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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diff changeset
450 return true;
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parents: 266
diff changeset
451 }
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diff changeset
452 @Override
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diff changeset
453 public int hashCode() {
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parents: 266
diff changeset
454 return hash;
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parents: 266
diff changeset
455 }
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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diff changeset
456
285
6dbbc53fc46d Use Path instead of plain String for manifest file names
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parents: 268
diff changeset
457 public Path freeze() {
267
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diff changeset
458 if (result == null) {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
459 Path.Source pf = HgManifest.this.pathFactory;
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
460 result = pf.path(HgManifest.this.encodingHelper.fromManifest(data, start, length));
268
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
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diff changeset
461 // release reference to bigger data array, make a copy of relevant part only
285
6dbbc53fc46d Use Path instead of plain String for manifest file names
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parents: 268
diff changeset
462 // use original bytes, not those from String above to avoid cache misses due to different encodings
268
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
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parents: 267
diff changeset
463 byte[] d = new byte[length];
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
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parents: 267
diff changeset
464 System.arraycopy(data, start, d, 0, length);
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
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parents: 267
diff changeset
465 data = d;
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diff changeset
466 start = 0;
267
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diff changeset
467 }
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diff changeset
468 return result;
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parents: 266
diff changeset
469 }
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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diff changeset
470 }
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 157
diff changeset
471
571
e4ee4bf4c7d0 Let session context control creation of Path instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 550
diff changeset
472 private class ManifestParser implements RevlogStream.Inspector, Lifecycle {
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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parents: 157
diff changeset
473 private final Inspector inspector;
431
12f668401613 FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
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parents: 426
diff changeset
474 private IdentityPool<Nodeid> nodeidPool, thisRevPool;
12f668401613 FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 426
diff changeset
475 private final IdentityPool<PathProxy> fnamePool;
266
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 264
diff changeset
476 private byte[] nodeidLookupBuffer = new byte[20]; // get reassigned each time new Nodeid is added to pool
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
477 private final ProgressSupport progressHelper;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
478 private IterateControlMediator iterateControl;
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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parents: 257
diff changeset
479
571
e4ee4bf4c7d0 Let session context control creation of Path instances
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parents: 550
diff changeset
480 public ManifestParser(Inspector delegate) {
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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parents: 157
diff changeset
481 assert delegate != null;
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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parents: 157
diff changeset
482 inspector = delegate;
431
12f668401613 FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 426
diff changeset
483 nodeidPool = new IdentityPool<Nodeid>();
12f668401613 FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 426
diff changeset
484 fnamePool = new IdentityPool<PathProxy>();
12f668401613 FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 426
diff changeset
485 thisRevPool = new IdentityPool<Nodeid>();
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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parents: 304
diff changeset
486 progressHelper = ProgressSupport.Factory.get(delegate);
196
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parents: 157
diff changeset
487 }
268
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
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parents: 267
diff changeset
488
423
9c9c442b5f2e Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 421
diff changeset
489 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) {
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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parents: 157
diff changeset
490 try {
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
491 if (!inspector.begin(revisionNumber, new Nodeid(nodeid, true), linkRevision)) {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
492 iterateControl.stop();
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
493 return;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
494 }
372
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
495 if (!da.isEmpty()) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
496 // although unlikely, manifest entry may be empty, when all files have been deleted from the repository
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
497 Path fname = null;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
498 Flags flags = null;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
499 Nodeid nid = null;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
500 int i;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
501 byte[] data = da.byteArray();
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
502 for (i = 0; i < actualLen; i++) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
503 int x = i;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
504 for( ; data[i] != '\n' && i < actualLen; i++) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
505 if (fname == null && data[i] == 0) {
571
e4ee4bf4c7d0 Let session context control creation of Path instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 550
diff changeset
506 PathProxy px = fnamePool.unify(new PathProxy(data, x, i - x));
372
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
507 // if (cached = fnamePool.unify(px))== px then cacheMiss, else cacheHit
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
508 // cpython 0..10k: hits: 15 989 152, misses: 3020
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
509 fname = px.freeze();
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
510 x = i+1;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
511 }
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 157
diff changeset
512 }
372
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
513 if (i < actualLen) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
514 assert data[i] == '\n';
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
515 int nodeidLen = i - x < 40 ? i-x : 40; // if > 40, there are flags
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
516 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
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
517 nid = new Nodeid(nodeidLookupBuffer, false); // this Nodeid is for pool lookup only, mock object
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
518 Nodeid cached = nodeidPool.unify(nid);
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
519 if (cached == nid) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
520 // buffer now belongs to the cached nodeid
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
521 nodeidLookupBuffer = new byte[20];
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
522 } else {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
523 nid = cached; // use existing version, discard the lookup object
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
524 } // for cpython 0..10k, cache hits are 15 973 301, vs 18871 misses.
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
525 thisRevPool.record(nid); // memorize revision for the next iteration.
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
526 if (nodeidLen + x < i) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
527 // 'x' and 'l' for executable bits and symlinks?
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
528 // hg --debug manifest shows 644 for each regular file in my repo
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
529 // for cpython 0..10k, there are 4361062 flag checks, and there's only 1 unique flag
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
530 flags = Flags.parse(data, x + nodeidLen, i-x-nodeidLen);
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
531 } else {
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
532 flags = Flags.RegularFile;
372
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
533 }
424
6437d261048a Deprecated code removed
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 423
diff changeset
534 boolean good2go = inspector.next(nid, fname, flags);
372
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
535 if (!good2go) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
536 iterateControl.stop();
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
537 return;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
538 }
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
539 }
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
540 nid = null;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
541 fname = null;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
542 flags = null;
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 157
diff changeset
543 }
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 157
diff changeset
544 }
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
545 if (!inspector.end(revisionNumber)) {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
546 iterateControl.stop();
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
547 return;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
548 }
262
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>
parents: 257
diff changeset
549 //
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>
parents: 257
diff changeset
550 // keep only actual file revisions, found at this version
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>
parents: 257
diff changeset
551 // (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
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 257
diff changeset
552 // 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>
parents: 257
diff changeset
553 nodeidPool.clear();
431
12f668401613 FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 426
diff changeset
554 IdentityPool<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
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 257
diff changeset
555 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
556 thisRevPool = t;
313
c1e3c18fd2f2 Test manifest cancellation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 312
diff changeset
557 iterateControl.checkCancelled();
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
558 progressHelper.worked(1);
196
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559 } catch (IOException ex) {
423
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560 throw new HgInvalidControlFileException("Failed reading manifest", ex, null).setRevisionIndex(revisionNumber);
196
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561 }
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562 }
312
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563
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564 public void start(int count, Callback callback, Object token) {
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565 CancelSupport cs = CancelSupport.Factory.get(inspector, null);
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566 iterateControl = new IterateControlMediator(cs, callback);
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567 progressHelper.start(count);
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568 }
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diff changeset
569
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diff changeset
570 public void finish(Object token) {
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571 progressHelper.done();
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572 }
196
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573 }
218
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574
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575 private static class RevisionMapper implements RevlogStream.Inspector, Lifecycle {
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576
403
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577 private final int changelogRevisionCount;
218
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578 private int[] changelog2manifest;
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579 private final HgRepository repo;
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580
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581 public RevisionMapper(HgRepository hgRepo) {
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582 repo = hgRepo;
403
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583 changelogRevisionCount = repo.getChangelog().getRevisionCount();
218
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584 }
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585
403
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586 /**
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587 * Get index of manifest revision that corresponds to specified changeset
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588 * @param changesetRevisionIndex non-negative index of changelog revision, or {@link HgRepository#TIP}
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589 * @return index of manifest revision, or {@link HgRepository#BAD_REVISION} if changeset doesn't reference a valid manifest
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590 * @throws HgInvalidRevisionException if method argument specifies non-existent revision index
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591 */
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592 public int at(int changesetRevisionIndex) throws HgInvalidRevisionException {
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593 if (changesetRevisionIndex == TIP) {
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594 changesetRevisionIndex = changelogRevisionCount - 1;
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595 }
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596 if (changesetRevisionIndex >= changelogRevisionCount) {
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597 throw new HgInvalidRevisionException(changesetRevisionIndex);
257
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598 }
218
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599 if (changelog2manifest != null) {
403
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600 return changelog2manifest[changesetRevisionIndex];
218
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601 }
403
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602 return changesetRevisionIndex;
218
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603 }
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diff changeset
604
324
283b294d1079 Explore alternatives to access file-changelog combined history
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diff changeset
605 // XXX likely can be replaced with Revlog.RevisionInspector
218
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606 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) {
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607 if (changelog2manifest != null) {
220
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608 // next assertion is not an error, rather assumption check, which is too development-related to be explicit exception -
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609 // I just wonder if there are manifests that have two entries pointing to single changeset. It seems unrealistic, though -
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610 // changeset records one and only one manifest nodeid
403
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611 assert changelog2manifest[linkRevision] == BAD_REVISION : String.format("revision:%d, link:%d, already linked to revision:%d", revisionNumber, linkRevision, changelog2manifest[linkRevision]);
218
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612 changelog2manifest[linkRevision] = revisionNumber;
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613 } else {
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614 if (revisionNumber != linkRevision) {
403
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615 changelog2manifest = new int[changelogRevisionCount];
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616 Arrays.fill(changelog2manifest, BAD_REVISION);
218
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617 for (int i = 0; i < revisionNumber; changelog2manifest[i] = i, i++)
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618 ;
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619 changelog2manifest[linkRevision] = revisionNumber;
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620 }
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621 }
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622 }
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diff changeset
623
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624 public void start(int count, Callback callback, Object token) {
403
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625 if (count != changelogRevisionCount) {
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diff changeset
626 assert count < changelogRevisionCount; // no idea what to do if manifest has more revisions than changelog
218
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627 // the way how manifest may contain more revisions than changelog, as I can imagine, is a result of
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diff changeset
628 // some kind of an import tool (e.g. from SVN or CVS), that creates manifest and changelog independently.
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629 // Note, it's pure guess, I didn't see such repository yet (although the way manifest revisions
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630 // in cpython repo are numbered makes me think aforementioned way)
403
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diff changeset
631 changelog2manifest = new int[changelogRevisionCount];
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diff changeset
632 Arrays.fill(changelog2manifest, BAD_REVISION);
218
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633 }
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634 }
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diff changeset
635
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diff changeset
636 public void finish(Object token) {
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637 if (changelog2manifest == null) {
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diff changeset
638 return;
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639 }
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diff changeset
640 // I assume there'd be not too many revisions we don't know manifest of
597
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diff changeset
641 IntVector undefinedChangelogRevision = new IntVector();
218
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642 for (int i = 0; i < changelog2manifest.length; i++) {
403
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diff changeset
643 if (changelog2manifest[i] == BAD_REVISION) {
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644 undefinedChangelogRevision.add(i);
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645 }
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646 }
597
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diff changeset
647 if (undefinedChangelogRevision.size() > 0) {
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diff changeset
648 final IntMap<Nodeid> missingCsetToManifest = new IntMap<Nodeid>(undefinedChangelogRevision.size());
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diff changeset
649 int[] undefinedClogRevs = undefinedChangelogRevision.toArray();
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diff changeset
650 // undefinedChangelogRevision is sorted by the nature it's created
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diff changeset
651 repo.getChangelog().rangeInternal(new HgChangelog.Inspector() {
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diff changeset
652
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diff changeset
653 public void next(int revisionIndex, Nodeid nodeid, RawChangeset cset) {
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diff changeset
654 missingCsetToManifest.put(revisionIndex, cset.manifest());
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655 }
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656 }, undefinedClogRevs);
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diff changeset
657 assert missingCsetToManifest.size() == undefinedChangelogRevision.size();
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658 for (int u : undefinedClogRevs) {
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diff changeset
659 Nodeid manifest = missingCsetToManifest.get(u);
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diff changeset
660 // TODO calculate those missing effectively (e.g. cache and sort nodeids to speed lookup
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diff changeset
661 // right away in the #next (may refactor ParentWalker's sequential and sorted into dedicated helper and reuse here)
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diff changeset
662 if (manifest == null || manifest.isNull()) {
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diff changeset
663 repo.getSessionContext().getLog().dump(getClass(), Severity.Warn, "Changeset %d has no associated manifest entry", u);
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diff changeset
664 // keep -1 in the changelog2manifest map.
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diff changeset
665 } else {
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diff changeset
666 changelog2manifest[u] = repo.getManifest().getRevisionIndex(manifest);
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diff changeset
667 }
354
5f9073eabf06 Propagate errors with exceptions up to a end client
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diff changeset
668 }
218
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669 }
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diff changeset
670 }
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671 }
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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diff changeset
672
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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diff changeset
673 /**
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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diff changeset
674 * Look up specified file in possibly multiple manifest revisions, collect file revision and flags.
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
675 */
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parents: 414
diff changeset
676 private static class FileLookupInspector implements RevlogStream.Inspector {
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
677
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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diff changeset
678 private final Path filename;
415
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diff changeset
679 private final byte[] filenameAsBytes;
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diff changeset
680 private final IntMap<Nodeid> csetIndex2FileRev;
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diff changeset
681 private final IntMap<Flags> csetIndex2Flags;
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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diff changeset
682 private final Inspector delegate;
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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diff changeset
683
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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diff changeset
684 public FileLookupInspector(EncodingHelper eh, Path fileToLookUp, IntMap<Nodeid> csetIndex2FileRevMap, IntMap<Flags> csetIndex2FlagsMap) {
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
685 assert fileToLookUp != null;
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parents: 414
diff changeset
686 // need at least one map for the inspector to make any sense
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
687 assert csetIndex2FileRevMap != null || csetIndex2FlagsMap != null;
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
688 filename = fileToLookUp;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
689 filenameAsBytes = eh.toManifest(fileToLookUp.toString());
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
690 delegate = null;
415
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parents: 414
diff changeset
691 csetIndex2FileRev = csetIndex2FileRevMap;
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
692 csetIndex2Flags = csetIndex2FlagsMap;
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
693 }
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
694
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
695 public FileLookupInspector(EncodingHelper eh, Path fileToLookUp, Inspector delegateInspector) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
696 assert fileToLookUp != null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
697 assert delegateInspector != null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
698 filename = fileToLookUp;
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
699 filenameAsBytes = eh.toManifest(fileToLookUp.toString());
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
700 delegate = delegateInspector;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
701 csetIndex2FileRev = null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
702 csetIndex2Flags = null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
703 }
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
704
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
705 void walk(int manifestRevIndex, RevlogStream content) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
706 content.iterate(manifestRevIndex, manifestRevIndex, true, this);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
707 }
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
708
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
709 void walk(int[] manifestRevIndexes, RevlogStream content) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
710 content.iterate(manifestRevIndexes, true, this);
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
711 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
712
423
9c9c442b5f2e Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
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parents: 421
diff changeset
713 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
714 ByteVector byteVector = new ByteVector(256, 128); // allocate for long paths right away
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
715 try {
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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diff changeset
716 byte b;
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
717 while (!data.isEmpty() && (b = data.readByte()) != '\n') {
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
718 if (b != 0) {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
719 byteVector.add(b);
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
720 } else {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
721 if (byteVector.equalsTo(filenameAsBytes)) {
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
722 Nodeid fileRev = null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
723 Flags flags = null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
724 if (csetIndex2FileRev != null || delegate != null) {
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
725 byte[] nid = new byte[40];
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
726 data.readBytes(nid, 0, 40);
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
727 fileRev = Nodeid.fromAscii(nid, 0, 40);
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
728 } else {
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
729 data.skip(40);
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
730 }
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
731 if (csetIndex2Flags != null || delegate != null) {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
732 byteVector.clear();
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
733 while (!data.isEmpty() && (b = data.readByte()) != '\n') {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
734 byteVector.add(b);
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
735 }
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
736 if (byteVector.size() == 0) {
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
737 flags = Flags.RegularFile;
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
738 } else {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
739 flags = Flags.parse(byteVector.toByteArray(), 0, byteVector.size());
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
740 }
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
741 }
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
742 if (delegate != null) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
743 assert flags != null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
744 assert fileRev != null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
745 delegate.begin(revisionNumber, Nodeid.fromBinary(nodeid, 0), linkRevision);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
746 delegate.next(fileRev, filename, flags);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
747 delegate.end(revisionNumber);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
748
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
749 } else {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
750 if (csetIndex2FileRev != null) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
751 csetIndex2FileRev.put(linkRevision, fileRev);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
752 }
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
753 if (csetIndex2Flags != null) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
754 csetIndex2Flags.put(linkRevision, flags);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
755 }
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
756 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
757 break;
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
758 } else {
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
759 data.skip(40);
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
760 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
761 // else skip to the end of line
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
762 while (!data.isEmpty() && (b = data.readByte()) != '\n')
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
763 ;
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
764
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
765 byteVector.clear();
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
766 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
767 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
768 } catch (IOException ex) {
423
9c9c442b5f2e Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 421
diff changeset
769 throw new HgInvalidControlFileException("Failed reading manifest", ex, null);
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
770 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
771 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
772 }
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
773 }