Mercurial > hg4j

annotate hg4j/src/main/java/org/tmatesoft/hg/repo/HgBundle.java @ 213:6ec4af642ba8 gradle

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Project uses Gradle for build - actual changes
author Alexander Kitaev <kitaev@gmail.com>
date Tue, 10 May 2011 10:52:53 +0200
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213
6ec4af642ba8 Project uses Gradle for build - actual changes
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1 /*
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2 * Copyright (c) 2011 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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19 import static org.tmatesoft.hg.core.Nodeid.NULL;
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20
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21 import java.io.File;
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22 import java.io.IOException;
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23 import java.util.LinkedList;
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24 import java.util.List;
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25
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26 import org.tmatesoft.hg.core.HgBadStateException;
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27 import org.tmatesoft.hg.core.HgException;
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28 import org.tmatesoft.hg.core.Nodeid;
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29 import org.tmatesoft.hg.internal.ByteArrayChannel;
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30 import org.tmatesoft.hg.internal.ByteArrayDataAccess;
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31 import org.tmatesoft.hg.internal.DataAccess;
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32 import org.tmatesoft.hg.internal.DataAccessProvider;
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33 import org.tmatesoft.hg.internal.DigestHelper;
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34 import org.tmatesoft.hg.internal.InflaterDataAccess;
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35 import org.tmatesoft.hg.internal.RevlogStream;
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36 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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37 import org.tmatesoft.hg.util.CancelledException;
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38
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39 /**
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40 * @see http://mercurial.selenic.com/wiki/BundleFormat
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41 *
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42 * @author Artem Tikhomirov
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43 * @author TMate Software Ltd.
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44 */
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45 public class HgBundle {
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46
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47 private final File bundleFile;
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48 private final DataAccessProvider accessProvider;
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49
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50 HgBundle(DataAccessProvider dap, File bundle) {
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51 accessProvider = dap;
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52 bundleFile = bundle;
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53 }
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54
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55 private DataAccess getDataStream() throws IOException {
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56 DataAccess da = accessProvider.create(bundleFile);
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57 byte[] signature = new byte[6];
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58 if (da.length() > 6) {
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59 da.readBytes(signature, 0, 6);
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60 if (signature[0] == 'H' && signature[1] == 'G' && signature[2] == '1' && signature[3] == '0') {
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61 if (signature[4] == 'G' && signature[5] == 'Z') {
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62 return new InflaterDataAccess(da, 6, da.length() - 6);
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63 }
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64 if (signature[4] == 'B' && signature[5] == 'Z') {
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65 throw HgRepository.notImplemented();
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66 }
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67 if (signature[4] != 'U' || signature[5] != 'N') {
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68 throw new HgBadStateException("Bad bundle signature:" + new String(signature));
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69 }
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70 // "...UN", fall-through
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71 } else {
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72 da.reset();
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73 }
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74 }
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75 return da;
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76 }
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77
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78 private int uses = 0;
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79 public HgBundle link() {
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80 uses++;
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81 return this;
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82 }
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83 public void unlink() {
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84 uses--;
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85 if (uses == 0 && bundleFile != null) {
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86 bundleFile.deleteOnExit();
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87 }
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88 }
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89 public boolean inUse() {
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90 return uses > 0;
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91 }
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92
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93 /**
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94 * Get changes recorded in the bundle that are missing from the supplied repository.
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95 * @param hgRepo repository that shall possess base revision for this bundle
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96 * @param inspector callback to get each changeset found
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97 */
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98 public void changes(final HgRepository hgRepo, final HgChangelog.Inspector inspector) throws HgException, IOException {
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99 Inspector bundleInsp = new Inspector() {
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100 DigestHelper dh = new DigestHelper();
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101 boolean emptyChangelog = true;
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102 private DataAccess prevRevContent;
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103 private int revisionIndex;
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104
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105 public void changelogStart() {
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106 emptyChangelog = true;
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107 revisionIndex = 0;
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108 }
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109
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110 public void changelogEnd() {
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111 if (emptyChangelog) {
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112 throw new IllegalStateException("No changelog group in the bundle"); // XXX perhaps, just be silent and/or log?
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113 }
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114 }
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115
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116 /*
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117 * Despite that BundleFormat wiki says: "Each Changelog entry patches the result of all previous patches
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118 * (the previous, or parent patch of a given patch p is the patch that has a node equal to p's p1 field)",
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119 * it seems not to hold true. Instead, each entry patches previous one, regardless of whether the one
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120 * before is its parent (i.e. ge.firstParent()) or not.
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121 *
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122 Actual state in the changelog.i
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123 Index Offset Flags Packed Actual Base Rev Link Rev Parent1 Parent2 nodeid
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124 50: 9212 0 209 329 48 50 49 -1 f1db8610da62a3e0beb8d360556ee1fd6eb9885e
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125 51: 9421 0 278 688 48 51 50 -1 9429c7bd1920fab164a9d2b621d38d57bcb49ae0
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126 52: 9699 0 154 179 52 52 50 -1 30bd389788464287cee22ccff54c330a4b715de5
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127 53: 9853 0 133 204 52 53 51 52 a6f39e595b2b54f56304470269a936ead77f5725
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128 54: 9986 0 156 182 54 54 52 -1 fd4f2c98995beb051070630c272a9be87bef617d
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129
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130 Excerpt from bundle (nodeid, p1, p2, cs):
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131 f1db8610da62a3e0beb8d360556ee1fd6eb9885e 26e3eeaa39623de552b45ee1f55c14f36460f220 0000000000000000000000000000000000000000 f1db8610da62a3e0beb8d360556ee1fd6eb9885e; patches:4
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132 9429c7bd1920fab164a9d2b621d38d57bcb49ae0 f1db8610da62a3e0beb8d360556ee1fd6eb9885e 0000000000000000000000000000000000000000 9429c7bd1920fab164a9d2b621d38d57bcb49ae0; patches:3
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133 > 30bd389788464287cee22ccff54c330a4b715de5 f1db8610da62a3e0beb8d360556ee1fd6eb9885e 0000000000000000000000000000000000000000 30bd389788464287cee22ccff54c330a4b715de5; patches:3
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134 a6f39e595b2b54f56304470269a936ead77f5725 9429c7bd1920fab164a9d2b621d38d57bcb49ae0 30bd389788464287cee22ccff54c330a4b715de5 a6f39e595b2b54f56304470269a936ead77f5725; patches:3
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135 fd4f2c98995beb051070630c272a9be87bef617d 30bd389788464287cee22ccff54c330a4b715de5 0000000000000000000000000000000000000000 fd4f2c98995beb051070630c272a9be87bef617d; patches:3
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136
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137 To recreate 30bd..e5, one have to take content of 9429..e0, not its p1 f1db..5e
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138 */
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139 public boolean element(GroupElement ge) {
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140 emptyChangelog = false;
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141 HgChangelog changelog = hgRepo.getChangelog();
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diff changeset
142 try {
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
143 if (prevRevContent == null) {
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144 if (NULL.equals(ge.firstParent()) && NULL.equals(ge.secondParent())) {
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145 prevRevContent = new ByteArrayDataAccess(new byte[0]);
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146 } else {
6ec4af642ba8 Project uses Gradle for build - actual changes
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147 final Nodeid base = ge.firstParent();
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148 if (!changelog.isKnown(base) /*only first parent, that's Bundle contract*/) {
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149 throw new IllegalStateException(String.format("Revision %s needs a parent %s, which is missing in the supplied repo %s", ge.node().shortNotation(), base.shortNotation(), hgRepo.toString()));
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150 }
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151 ByteArrayChannel bac = new ByteArrayChannel();
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152 changelog.rawContent(base, bac); // FIXME get DataAccess directly, to avoid
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153 // extra byte[] (inside ByteArrayChannel) duplication just for the sake of subsequent ByteArrayDataChannel wrap.
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154 prevRevContent = new ByteArrayDataAccess(bac.toArray());
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155 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
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156 }
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Alexander Kitaev <kitaev@gmail.com>
parents:
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157 //
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Alexander Kitaev <kitaev@gmail.com>
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158 byte[] csetContent = ge.apply(prevRevContent);
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159 dh = dh.sha1(ge.firstParent(), ge.secondParent(), csetContent); // XXX ge may give me access to byte[] content of nodeid directly, perhaps, I don't need DH to be friend of Nodeid?
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160 if (!ge.node().equalsTo(dh.asBinary())) {
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161 throw new IllegalStateException("Integrity check failed on " + bundleFile + ", node:" + ge.node());
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162 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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163 ByteArrayDataAccess csetDataAccess = new ByteArrayDataAccess(csetContent);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
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164 RawChangeset cs = RawChangeset.parse(csetDataAccess);
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Alexander Kitaev <kitaev@gmail.com>
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165 inspector.next(revisionIndex++, ge.node(), cs);
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166 prevRevContent.done();
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167 prevRevContent = csetDataAccess.reset();
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168 } catch (CancelledException ex) {
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169 return false;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
170 } catch (Exception ex) {
6ec4af642ba8 Project uses Gradle for build - actual changes
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171 throw new HgBadStateException(ex); // FIXME
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parents:
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172 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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173 return true;
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Alexander Kitaev <kitaev@gmail.com>
parents:
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174 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
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175
6ec4af642ba8 Project uses Gradle for build - actual changes
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176 public void manifestStart() {}
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177 public void manifestEnd() {}
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178 public void fileStart(String name) {}
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parents:
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179 public void fileEnd(String name) {}
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parents:
diff changeset
180
6ec4af642ba8 Project uses Gradle for build - actual changes
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181 };
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
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182 inspectChangelog(bundleInsp);
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parents:
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183 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
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184
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
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185 public void dump() throws IOException {
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parents:
diff changeset
186 Dump dump = new Dump();
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parents:
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187 inspectAll(dump);
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parents:
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188 System.out.println("Total files:" + dump.names.size());
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parents:
diff changeset
189 for (String s : dump.names) {
6ec4af642ba8 Project uses Gradle for build - actual changes
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190 System.out.println(s);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
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191 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
192 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
193
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
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194 // callback to minimize amount of Strings and Nodeids instantiated
6ec4af642ba8 Project uses Gradle for build - actual changes
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195 public interface Inspector {
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
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196 void changelogStart();
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
197
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
198 void changelogEnd();
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
199
6ec4af642ba8 Project uses Gradle for build - actual changes
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200 void manifestStart();
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
201
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
202 void manifestEnd();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
203
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
204 void fileStart(String name);
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
205
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
206 void fileEnd(String name);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
207
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
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208 /**
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
209 * XXX desperately need exceptions here
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parents:
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210 * @param element data element, instance might be reused, don't keep a reference to it or its raw data
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
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211 * @return <code>true</code> to continue
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
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212 */
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213 boolean element(GroupElement element);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
214 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
215
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
216 public static class Dump implements Inspector {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
217 public final LinkedList<String> names = new LinkedList<String>();
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
218
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
219 public void changelogStart() {
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
220 System.out.println("Changelog group");
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
221 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
222
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
223 public void changelogEnd() {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
224 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
225
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
226 public void manifestStart() {
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
227 System.out.println("Manifest group");
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
228 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
229
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
230 public void manifestEnd() {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
231 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
232
6ec4af642ba8 Project uses Gradle for build - actual changes
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diff changeset
233 public void fileStart(String name) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
234 names.add(name);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
235 System.out.println(name);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
236 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
237
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
238 public void fileEnd(String name) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
239 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
240
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
241 public boolean element(GroupElement ge) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
242 try {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
243 System.out.printf(" %s %s %s %s; patches:%d\n", ge.node(), ge.firstParent(), ge.secondParent(), ge.cset(), ge.patches().size());
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
244 } catch (Exception ex) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
245 ex.printStackTrace(); // FIXME
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
246 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
247 return true;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
248 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
249 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
250
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
251 public void inspectChangelog(Inspector inspector) throws IOException {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
252 if (inspector == null) {
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
253 throw new IllegalArgumentException();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
254 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
255 DataAccess da = getDataStream();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
256 try {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
257 internalInspectChangelog(da, inspector);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
258 } finally {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
259 da.done();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
260 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
261 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
262
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
263 public void inspectManifest(Inspector inspector) throws IOException {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
264 if (inspector == null) {
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
265 throw new IllegalArgumentException();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
266 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
267 DataAccess da = getDataStream();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
268 try {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
269 if (da.isEmpty()) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
270 return;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
271 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
272 skipGroup(da); // changelog
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
273 internalInspectManifest(da, inspector);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
274 } finally {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
275 da.done();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
276 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
277 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
278
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
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diff changeset
279 public void inspectFiles(Inspector inspector) throws IOException {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
280 if (inspector == null) {
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
281 throw new IllegalArgumentException();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
282 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
283 DataAccess da = getDataStream();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
284 try {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
285 if (da.isEmpty()) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
286 return;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
287 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
288 skipGroup(da); // changelog
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
289 if (da.isEmpty()) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
290 return;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
291 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
292 skipGroup(da); // manifest
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
293 internalInspectFiles(da, inspector);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
294 } finally {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
295 da.done();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
296 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
297 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
298
6ec4af642ba8 Project uses Gradle for build - actual changes
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diff changeset
299 public void inspectAll(Inspector inspector) throws IOException {
6ec4af642ba8 Project uses Gradle for build - actual changes
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300 if (inspector == null) {
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301 throw new IllegalArgumentException();
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302 }
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303 DataAccess da = getDataStream();
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304 try {
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305 internalInspectChangelog(da, inspector);
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306 internalInspectManifest(da, inspector);
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307 internalInspectFiles(da, inspector);
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308 } finally {
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309 da.done();
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310 }
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311 }
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312
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313 private void internalInspectChangelog(DataAccess da, Inspector inspector) throws IOException {
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314 if (da.isEmpty()) {
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315 return;
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316 }
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317 inspector.changelogStart();
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318 readGroup(da, inspector);
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319 inspector.changelogEnd();
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320 }
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321
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322 private void internalInspectManifest(DataAccess da, Inspector inspector) throws IOException {
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323 if (da.isEmpty()) {
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324 return;
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325 }
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326 inspector.manifestStart();
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327 readGroup(da, inspector);
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328 inspector.manifestEnd();
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329 }
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330
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331 private void internalInspectFiles(DataAccess da, Inspector inspector) throws IOException {
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332 while (!da.isEmpty()) {
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333 int fnameLen = da.readInt();
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334 if (fnameLen <= 4) {
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335 break; // null chunk, the last one.
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336 }
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337 byte[] fnameBuf = new byte[fnameLen - 4];
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338 da.readBytes(fnameBuf, 0, fnameBuf.length);
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339 String name = new String(fnameBuf);
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340 inspector.fileStart(name);
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341 readGroup(da, inspector);
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342 inspector.fileEnd(name);
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343 }
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344 }
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345
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346 private static void readGroup(DataAccess da, Inspector inspector) throws IOException {
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347 int len = da.readInt();
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348 boolean good2go = true;
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349 while (len > 4 && !da.isEmpty() && good2go) {
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350 byte[] nb = new byte[80];
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351 da.readBytes(nb, 0, 80);
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352 int dataLength = len - 84 /* length field + 4 nodeids */;
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353 byte[] data = new byte[dataLength];
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354 da.readBytes(data, 0, dataLength);
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355 DataAccess slice = new ByteArrayDataAccess(data); // XXX in fact, may pass a slicing DataAccess.
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356 // Just need to make sure that we seek to proper location afterwards (where next GroupElement starts),
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357 // regardless whether that slice has read it or not.
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358 GroupElement ge = new GroupElement(nb, slice);
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359 good2go = inspector.element(ge);
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parents:
diff changeset
360 slice.done(); // BADA doesn't implement done(), but it could (e.g. free array)
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361 /// and we'd better tell it we are not going to use it any more. However, it's important to ensure Inspector
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parents:
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362 // implementations out there do not retain GroupElement.rawData()
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Alexander Kitaev <kitaev@gmail.com>
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363 len = da.isEmpty() ? 0 : da.readInt();
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364 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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diff changeset
365 // need to skip up to group end if inspector told he don't want to continue with the group,
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Alexander Kitaev <kitaev@gmail.com>
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366 // because outer code may try to read next group immediately as we return back.
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diff changeset
367 while (len > 4 && !da.isEmpty()) {
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368 da.skip(len - 4 /* length field */);
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369 len = da.isEmpty() ? 0 : da.readInt();
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370 }
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parents:
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371 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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372
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373 private static void skipGroup(DataAccess da) throws IOException {
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374 int len = da.readInt();
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375 while (len > 4 && !da.isEmpty()) {
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diff changeset
376 da.skip(len - 4); // sizeof(int)
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diff changeset
377 len = da.isEmpty() ? 0 : da.readInt();
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parents:
diff changeset
378 }
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parents:
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379 }
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380
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381 public static class GroupElement {
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382 private final byte[] header; // byte[80] takes 120 bytes, 4 Nodeids - 192
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383 private final DataAccess dataAccess;
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384 private List<RevlogStream.PatchRecord> patches;
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385
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386 GroupElement(byte[] fourNodeids, DataAccess rawDataAccess) {
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387 assert fourNodeids != null && fourNodeids.length == 80;
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388 header = fourNodeids;
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389 dataAccess = rawDataAccess;
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diff changeset
390 }
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391
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392 public Nodeid node() {
6ec4af642ba8 Project uses Gradle for build - actual changes
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393 return Nodeid.fromBinary(header, 0);
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Alexander Kitaev <kitaev@gmail.com>
parents:
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394 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
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395
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396 public Nodeid firstParent() {
6ec4af642ba8 Project uses Gradle for build - actual changes
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397 return Nodeid.fromBinary(header, 20);
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
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398 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
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399
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400 public Nodeid secondParent() {
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
401 return Nodeid.fromBinary(header, 40);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
402 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
403
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
404 public Nodeid cset() { // cs seems to be changeset
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
405 return Nodeid.fromBinary(header, 60);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
406 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
407
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Alexander Kitaev <kitaev@gmail.com>
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diff changeset
408 public DataAccess rawData() {
6ec4af642ba8 Project uses Gradle for build - actual changes
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diff changeset
409 return dataAccess;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
410 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
411
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
412 public List<RevlogStream.PatchRecord> patches() throws IOException {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
413 if (patches == null) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
414 dataAccess.reset();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
415 LinkedList<RevlogStream.PatchRecord> p = new LinkedList<RevlogStream.PatchRecord>();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
416 while (!dataAccess.isEmpty()) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
417 RevlogStream.PatchRecord pr = RevlogStream.PatchRecord.read(dataAccess);
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Alexander Kitaev <kitaev@gmail.com>
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diff changeset
418 p.add(pr);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
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419 }
6ec4af642ba8 Project uses Gradle for build - actual changes
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420 patches = p;
6ec4af642ba8 Project uses Gradle for build - actual changes
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parents:
diff changeset
421 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
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422 return patches;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
423 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
424
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
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diff changeset
425 public byte[] apply(DataAccess baseContent) throws IOException {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
426 return RevlogStream.apply(baseContent, -1, patches());
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
427 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
428 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
429 }