Mercurial > hg4j

annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 423:9c9c442b5f2e

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Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 23 Mar 2012 22:51:18 +0100
parents 7f136a3fa671
children 6437d261048a
rev   line source
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1 /*
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2 * Copyright (c) 2010-2012 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.repo;
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18
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19 import java.io.IOException;
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20 import java.io.UnsupportedEncodingException;
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21 import java.util.ArrayList;
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22 import java.util.Arrays;
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23 import java.util.Calendar;
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24 import java.util.Collection;
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25 import java.util.Collections;
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26 import java.util.Date;
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27 import java.util.Formatter;
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28 import java.util.HashMap;
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29 import java.util.List;
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30 import java.util.Locale;
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31 import java.util.Map;
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32 import java.util.TimeZone;
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34 import org.tmatesoft.hg.core.HgBadArgumentException;
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35 import org.tmatesoft.hg.core.Nodeid;
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36 import org.tmatesoft.hg.internal.Callback;
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37 import org.tmatesoft.hg.internal.DataAccess;
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38 import org.tmatesoft.hg.internal.IterateControlMediator;
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39 import org.tmatesoft.hg.internal.Lifecycle;
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40 import org.tmatesoft.hg.internal.Pool;
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41 import org.tmatesoft.hg.internal.RevlogStream;
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42 import org.tmatesoft.hg.util.CancelSupport;
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43 import org.tmatesoft.hg.util.Pair;
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44 import org.tmatesoft.hg.util.ProgressSupport;
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45
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46 /**
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47 * Representation of the Mercurial changelog file (list of ChangeSets)
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48 *
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49 * @author Artem Tikhomirov
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50 * @author TMate Software Ltd.
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51 */
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52 public class HgChangelog extends Revlog {
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53
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54 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) {
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55 super(hgRepo, content);
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56 }
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58 public void all(final HgChangelog.Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
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59 range(0, getLastRevision(), inspector);
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60 }
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62 public void range(int start, int end, final HgChangelog.Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
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63 if (inspector == null) {
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64 throw new IllegalArgumentException();
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65 }
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66 content.iterate(start, end, true, new RawCsetParser(inspector));
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67 }
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69 public List<RawChangeset> range(int start, int end) throws HgInvalidRevisionException, HgInvalidControlFileException {
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70 final RawCsetCollector c = new RawCsetCollector(end - start + 1);
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71 range(start, end, c);
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72 return c.result;
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73 }
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75 /**
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76 * Access individual revisions. Note, regardless of supplied revision order, inspector gets
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77 * changesets strictly in the order they are in the changelog.
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78 * @param inspector callback to get changesets
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79 * @param revisions revisions to read, unrestricted ordering.
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80 */
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81 public void range(final HgChangelog.Inspector inspector, final int... revisions) throws HgInvalidRevisionException, HgInvalidControlFileException {
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82 Arrays.sort(revisions);
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83 rangeInternal(inspector, revisions);
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84 }
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85
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86 /**
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87 * Friends-only version of {@link #range(Inspector, int...)}, when callers know array is sorted
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88 */
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89 /*package-local*/ void rangeInternal(HgChangelog.Inspector inspector, int[] sortedRevisions) throws HgInvalidRevisionException, HgInvalidControlFileException {
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90 if (sortedRevisions == null || sortedRevisions.length == 0) {
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91 return;
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92 }
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93 if (inspector == null) {
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94 throw new IllegalArgumentException();
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95 }
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96 content.iterate(sortedRevisions, true, new RawCsetParser(inspector));
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97 }
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99 /**
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100 * @throws HgInvalidRevisionException if supplied nodeid doesn't identify any revision from this revlog
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101 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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102 */
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103 public RawChangeset changeset(Nodeid nid) throws HgInvalidControlFileException, HgInvalidRevisionException {
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104 int x = getRevisionIndex(nid);
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105 return range(x, x).get(0);
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106 }
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108 @Callback
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109 public interface Inspector {
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110 /**
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111 * Access next changeset
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112 * TODO describe what revisionNumber is when Inspector is used with HgBundle (BAD_REVISION or bundle's local order?)
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113 *
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114 * @param revisionIndex index of revision being inspected, local to the inspected object
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115 * @param nodeid revision being inspected
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116 * @param cset changeset raw data
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117 */
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118 void next(int revisionIndex, Nodeid nodeid, RawChangeset cset);
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119 }
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120
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121 /**
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122 * Unlike regular {@link Inspector}, this one supplies changeset revision along with its parents and children according
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123 * to parent information of the revlog this inspector visits.
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124 * @see HgDataFile#history(HgChangelog.TreeInspector)
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125 * @deprecated use {@link org.tmatesoft.hg.core.HgChangesetTreeHandler} and HgLogCommand#execute(org.tmatesoft.hg.core.HgChangesetTreeHandler)}
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126 */
328
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127 @Deprecated
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128 public interface TreeInspector {
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129 // the reason TreeInsector is in HgChangelog, not in Revlog, because despite the fact it can
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130 // be applied to any revlog, it's not meant to provide revisions of any revlog it's beeing applied to,
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131 // but changeset revisions always.
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132 // TODO HgChangelog.walk(TreeInspector)
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133 void next(Nodeid changesetRevision, Pair<Nodeid, Nodeid> parentChangesets, Collection<Nodeid> childChangesets);
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134 }
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135
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136 /**
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137 * Entry in the Changelog
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138 */
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139 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{
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140 // TODO immutable
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141 private/* final */Nodeid manifest;
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142 private String user;
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143 private String comment;
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144 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised)
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145 private Date time;
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146 private int timezone;
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147 // http://mercurial.selenic.com/wiki/PruningDeadBranches - Closing changesets can be identified by close=1 in the changeset's extra field.
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148 private Map<String, String> extras;
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149
153
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150 /**
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151 * @see mercurial/changelog.py:read()
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152 *
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153 * <pre>
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154 * format used:
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155 * nodeid\n : manifest node in ascii
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156 * user\n : user, no \n or \r allowed
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157 * time tz extra\n : date (time is int or float, timezone is int)
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158 * : extra is metadatas, encoded and separated by '\0'
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159 * : older versions ignore it
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160 * files\n\n : files modified by the cset, no \n or \r allowed
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161 * (.*) : comment (free text, ideally utf-8)
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162 *
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163 * changelog v0 doesn't use extra
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164 * </pre>
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165 */
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166 private RawChangeset() {
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167 }
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168
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169 public Nodeid manifest() {
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170 return manifest;
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171 }
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172
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173 public String user() {
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174 return user;
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175 }
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176
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177 public String comment() {
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178 return comment;
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179 }
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180
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181 public List<String> files() {
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182 return files;
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183 }
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184
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185 public Date date() {
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186 return time;
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187 }
211
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188
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189 /**
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190 * @return time zone value, as is, positive for Western Hemisphere.
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191 */
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192 public int timezone() {
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193 return timezone;
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194 }
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195
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196 public String dateString() {
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197 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone?
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198 StringBuilder sb = new StringBuilder(30);
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199 Formatter f = new Formatter(sb, Locale.US);
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200 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]);
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201 // apparently timezone field records number of seconds time differs from UTC,
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202 // i.e. value to substract from time to get UTC time. Calendar seems to add
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203 // timezone offset to UTC, instead, hence sign change.
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204 // tz.setRawOffset(timezone * -1000);
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205 Calendar c = Calendar.getInstance(tz, Locale.US);
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206 c.setTime(time);
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207 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c);
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208 return sb.toString();
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209 }
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210
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211 public Map<String, String> extras() {
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212 return extras;
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213 }
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214
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215 public String branch() {
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216 return extras.get("branch");
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217 }
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218
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219 @Override
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220 public String toString() {
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221 StringBuilder sb = new StringBuilder();
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222 sb.append("Changeset {");
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223 sb.append("User: ").append(user).append(", ");
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224 sb.append("Comment: ").append(comment).append(", ");
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225 sb.append("Manifest: ").append(manifest).append(", ");
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226 sb.append("Date: ").append(time).append(", ");
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227 sb.append("Files: ").append(files.size());
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228 for (String s : files) {
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229 sb.append(", ").append(s);
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230 }
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231 if (extras != null) {
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232 sb.append(", Extra: ").append(extras);
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233 }
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234 sb.append("}");
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235 return sb.toString();
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236 }
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237
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238 @Override
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239 public RawChangeset clone() {
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240 try {
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241 return (RawChangeset) super.clone();
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242 } catch (CloneNotSupportedException ex) {
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243 throw new InternalError(ex.toString());
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244 }
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245 }
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246
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247 /*package*/ static RawChangeset parse(DataAccess da) throws IOException, HgBadArgumentException {
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248 byte[] data = da.byteArray();
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249 RawChangeset rv = new RawChangeset();
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250 rv.init(data, 0, data.length, null);
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251 return rv;
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252 }
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253
196
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254 // @param usersPool - it's likely user names get repeated again and again throughout repository. can be null
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255 // FIXME replace HgBadArgumentException with HgInvalidDataFormatException or HgInvalidControlFileException
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256 /* package-local */void init(byte[] data, int offset, int length, Pool<String> usersPool) throws HgBadArgumentException {
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257 final int bufferEndIndex = offset + length;
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258 final byte lineBreak = (byte) '\n';
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259 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex);
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260 if (breakIndex1 == -1) {
366
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261 throw new HgBadArgumentException("Bad Changeset data", null);
153
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262 }
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263 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1);
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264 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex);
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265 if (breakIndex2 == -1) {
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266 throw new HgBadArgumentException("Bad Changeset data", null);
153
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267 }
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268 String _user = new String(data, breakIndex1 + 1, breakIndex2 - breakIndex1 - 1);
196
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269 if (usersPool != null) {
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270 _user = usersPool.unify(_user);
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271 }
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272 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex);
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273 if (breakIndex3 == -1) {
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274 throw new HgBadArgumentException("Bad Changeset data", null);
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275 }
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276 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1);
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277 int space1 = _timeString.indexOf(' ');
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278 if (space1 == -1) {
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279 throw new HgBadArgumentException(String.format("Bad Changeset data: %s in [%d..%d]", "time string", breakIndex2+1, breakIndex3), null);
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280 }
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281 int space2 = _timeString.indexOf(' ', space1 + 1);
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282 if (space2 == -1) {
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283 space2 = _timeString.length();
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284 }
363
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285 long unixTime = Long.parseLong(_timeString.substring(0, space1));
153
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286 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2));
363
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287 // unixTime is local time, and timezone records difference of the local time to UTC.
153
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288 Date _time = new Date(unixTime * 1000);
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289 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null;
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290 Map<String, String> _extrasMap;
252
a6d19adc2636 HgRepository.getWorkingCopyBranchName() to retrieve branch associated with working directory
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291 final String extras_branch_key = "branch";
386
73e875154afb Do not fail with empty extras string in changeset
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292 if (_extras == null || _extras.trim().length() == 0) {
252
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293 _extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME);
153
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294 } else {
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295 _extrasMap = new HashMap<String, String>();
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296 for (String pair : _extras.split("\00")) {
363
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297 pair = decode(pair);
153
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298 int eq = pair.indexOf(':');
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299 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1));
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300 }
252
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301 if (!_extrasMap.containsKey(extras_branch_key)) {
a6d19adc2636 HgRepository.getWorkingCopyBranchName() to retrieve branch associated with working directory
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302 _extrasMap.put(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME);
153
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303 }
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304 _extrasMap = Collections.unmodifiableMap(_extrasMap);
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305 }
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306
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307 //
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308 int lastStart = breakIndex3 + 1;
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309 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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310 ArrayList<String> _files = null;
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311 if (breakIndex4 > lastStart) {
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312 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision)
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313 _files = new ArrayList<String>(5);
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314 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) {
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315 _files.add(new String(data, lastStart, breakIndex4 - lastStart));
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316 lastStart = breakIndex4 + 1;
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317 if (data[breakIndex4 + 1] == lineBreak) {
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318 // found \n\n
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319 break;
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320 } else {
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321 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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322 }
153
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323 }
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324 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) {
366
189dc6dc1c3e Use exceptions to expose errors reading mercurial data
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325 throw new HgBadArgumentException("Bad Changeset data", null);
153
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326 }
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327 } else {
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328 breakIndex4--;
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329 }
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330 String _comment;
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331 try {
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332 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8");
418
528b6780a8bd A bit of FIXME cleanup (mostly degraded to TODO post 1.0), comments and javadoc
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333 // TODO post-1.0 respect ui.fallbackencoding and try to decode if set; use EncodingHelper
153
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334 } catch (UnsupportedEncodingException ex) {
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335 _comment = "";
366
189dc6dc1c3e Use exceptions to expose errors reading mercurial data
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diff changeset
336 // Could hardly happen
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337 throw new HgBadArgumentException("Bad Changeset data", ex);
153
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338 }
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339 // change this instance at once, don't leave it partially changes in case of error
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340 this.manifest = _nodeid;
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341 this.user = _user;
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342 this.time = _time;
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343 this.timezone = _timezone;
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344 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files);
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345 this.comment = _comment;
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346 this.extras = _extrasMap;
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347 }
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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diff changeset
348
153
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diff changeset
349 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) {
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diff changeset
350 for (int i = startOffset; i < endIndex; i++) {
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diff changeset
351 if (src[i] == what) {
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352 return i;
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353 }
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diff changeset
354 }
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diff changeset
355 return -1;
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diff changeset
356 }
363
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
357
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
358 private static String decode(String s) {
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
359 if (s != null && s.indexOf('\\') != -1) {
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
360 // TestAuxUtilities#testChangelogExtrasDecode
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
361 return s.replace("\\\\", "\\").replace("\\n", "\n").replace("\\r", "\r").replace("\\0", "\00");
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
362 }
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
363 return s;
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
364 }
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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diff changeset
365 }
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
366
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
367 private static class RawCsetCollector implements Inspector {
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diff changeset
368 final ArrayList<RawChangeset> result;
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diff changeset
369
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diff changeset
370 public RawCsetCollector(int count) {
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diff changeset
371 result = new ArrayList<RawChangeset>(count > 0 ? count : 5);
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diff changeset
372 }
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diff changeset
373
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
374 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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diff changeset
375 result.add(cset.clone());
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diff changeset
376 }
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diff changeset
377 }
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diff changeset
378
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
379 private static class RawCsetParser implements RevlogStream.Inspector, Lifecycle {
196
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diff changeset
380
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diff changeset
381 private final Inspector inspector;
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diff changeset
382 private final Pool<String> usersPool;
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diff changeset
383 private final RawChangeset cset = new RawChangeset();
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
384 private final ProgressSupport progressHelper;
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diff changeset
385 private IterateControlMediator iterateControl;
196
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diff changeset
386
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
387 public RawCsetParser(HgChangelog.Inspector delegate) {
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diff changeset
388 assert delegate != null;
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diff changeset
389 inspector = delegate;
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diff changeset
390 usersPool = new Pool<String>();
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
391 progressHelper = ProgressSupport.Factory.get(delegate);
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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392 }
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393
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394 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) {
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395 try {
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396 byte[] data = da.byteArray();
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397 cset.init(data, 0, data.length, usersPool);
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398 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse
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399 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset);
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400 progressHelper.worked(1);
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401 } catch (HgBadArgumentException ex) {
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402 // see below about better exception
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403 throw new HgInvalidControlFileException("Failed reading changelog", ex, null).setRevisionIndex(revisionNumber);
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404 } catch (IOException ex) {
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405 // XXX need better exception, perhaps smth like HgChangelogException (extends HgInvalidControlFileException)
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406 throw new HgInvalidControlFileException("Failed reading changelog", ex, null).setRevisionIndex(revisionNumber);
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407 }
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408 if (iterateControl != null) {
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409 iterateControl.checkCancelled();
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410 }
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411 }
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412
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413 public void start(int count, Callback callback, Object token) {
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414 CancelSupport cs = CancelSupport.Factory.get(inspector, null);
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415 iterateControl = cs == null ? null : new IterateControlMediator(cs, callback);
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416 progressHelper.start(count);
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417 }
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418
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419 public void finish(Object token) {
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420 progressHelper.done();
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421 }
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422 }
0
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423 }