Mercurial > hg4j

annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 619:868b2ffdcd5c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Close FIS, not FileChannel, to clear both references to FileDescriptor right away
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 17 May 2013 22:04:23 +0200
parents 46f29b73e51e
children 6526d8adbc0f
rev   line source
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1 /*
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2 * Copyright (c) 2010-2013 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.repo;
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18
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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.Collections;
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25 import java.util.Date;
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26 import java.util.Formatter;
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27 import java.util.HashMap;
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28 import java.util.List;
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29 import java.util.Locale;
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30 import java.util.Map;
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31 import java.util.TimeZone;
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32
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33 import org.tmatesoft.hg.core.Nodeid;
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34 import org.tmatesoft.hg.internal.Callback;
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35 import org.tmatesoft.hg.internal.DataAccess;
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36 import org.tmatesoft.hg.internal.Lifecycle;
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37 import org.tmatesoft.hg.internal.LifecycleBridge;
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38 import org.tmatesoft.hg.internal.Pool;
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39 import org.tmatesoft.hg.internal.RevlogStream;
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40 import org.tmatesoft.hg.util.Adaptable;
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41 import org.tmatesoft.hg.util.CancelSupport;
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42 import org.tmatesoft.hg.util.ProgressSupport;
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43
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44 /**
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45 * Representation of the Mercurial changelog file (list of ChangeSets)
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46 *
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47 * @author Artem Tikhomirov
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48 * @author TMate Software Ltd.
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49 */
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50 public final class HgChangelog extends Revlog {
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51
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52 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) {
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53 super(hgRepo, content, true);
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54 }
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55
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56 public void all(final HgChangelog.Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
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57 range(0, getLastRevision(), inspector);
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58 }
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60 public void range(int start, int end, final HgChangelog.Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
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61 if (inspector == null) {
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62 throw new IllegalArgumentException();
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63 }
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64 content.iterate(start, end, true, new RawCsetParser(inspector));
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65 }
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67 public List<RawChangeset> range(int start, int end) throws HgInvalidRevisionException, HgInvalidControlFileException {
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68 final RawCsetCollector c = new RawCsetCollector(end - start + 1);
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69 range(start, end, c);
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70 return c.result;
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71 }
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73 /**
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74 * Access individual revisions. Note, regardless of supplied revision order, inspector gets
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75 * changesets strictly in the order they are in the changelog.
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76 * @param inspector callback to get changesets
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77 * @param revisions revisions to read, unrestricted ordering.
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78 */
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79 public void range(final HgChangelog.Inspector inspector, final int... revisions) throws HgInvalidRevisionException, HgInvalidControlFileException {
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80 Arrays.sort(revisions);
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81 rangeInternal(inspector, revisions);
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82 }
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84 /**
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85 * Friends-only version of {@link #range(Inspector, int...)}, when callers know array is sorted
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86 */
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87 /*package-local*/ void rangeInternal(HgChangelog.Inspector inspector, int[] sortedRevisions) throws HgInvalidRevisionException, HgInvalidControlFileException {
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88 if (sortedRevisions == null || sortedRevisions.length == 0) {
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89 return;
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90 }
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91 if (inspector == null) {
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92 throw new IllegalArgumentException();
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93 }
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94 content.iterate(sortedRevisions, true, new RawCsetParser(inspector));
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95 }
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97 /**
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98 * @throws HgInvalidRevisionException if supplied nodeid doesn't identify any revision from this revlog
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99 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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100 */
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101 public RawChangeset changeset(Nodeid nid) throws HgInvalidControlFileException, HgInvalidRevisionException {
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102 int x = getRevisionIndex(nid);
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103 return range(x, x).get(0);
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104 }
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105
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106 @Callback
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107 public interface Inspector {
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108 /**
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109 * Access next changeset
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110 * TODO describe what revisionNumber is when Inspector is used with HgBundle (BAD_REVISION or bundle's local order?)
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111 *
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112 * @param revisionIndex index of revision being inspected, local to the inspected object
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113 * @param nodeid revision being inspected
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114 * @param cset changeset raw data
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115 */
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116 void next(int revisionIndex, Nodeid nodeid, RawChangeset cset);
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117 }
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119 /**
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120 * Entry in the Changelog
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121 */
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122 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{
129
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123 // TODO immutable
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124 private/* final */Nodeid manifest;
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125 private String user;
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126 private String comment;
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127 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised)
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128 private Date time;
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129 private int timezone;
161
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130 // http://mercurial.selenic.com/wiki/PruningDeadBranches - Closing changesets can be identified by close=1 in the changeset's extra field.
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131 private Map<String, String> extras;
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132
153
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133 /**
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134 * @see mercurial/changelog.py:read()
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135 *
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136 * <pre>
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137 * format used:
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138 * nodeid\n : manifest node in ascii
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139 * user\n : user, no \n or \r allowed
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140 * time tz extra\n : date (time is int or float, timezone is int)
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141 * : extra is metadatas, encoded and separated by '\0'
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142 * : older versions ignore it
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143 * files\n\n : files modified by the cset, no \n or \r allowed
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144 * (.*) : comment (free text, ideally utf-8)
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145 *
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146 * changelog v0 doesn't use extra
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147 * </pre>
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148 */
154
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149 private RawChangeset() {
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150 }
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151
153
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152 public Nodeid manifest() {
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153 return manifest;
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154 }
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155
153
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156 public String user() {
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157 return user;
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158 }
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159
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160 public String comment() {
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161 return comment;
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162 }
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163
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164 public List<String> files() {
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165 return files;
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166 }
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167
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168 public Date date() {
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169 return time;
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170 }
211
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171
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172 /**
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173 * @return time zone value, as is, positive for Western Hemisphere.
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174 */
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175 public int timezone() {
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176 return timezone;
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177 }
153
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178
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179 public String dateString() {
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180 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone?
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181 StringBuilder sb = new StringBuilder(30);
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182 Formatter f = new Formatter(sb, Locale.US);
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183 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]);
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184 // apparently timezone field records number of seconds time differs from UTC,
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185 // i.e. value to substract from time to get UTC time. Calendar seems to add
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186 // timezone offset to UTC, instead, hence sign change.
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187 // tz.setRawOffset(timezone * -1000);
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188 Calendar c = Calendar.getInstance(tz, Locale.US);
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189 c.setTime(time);
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190 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c);
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191 return sb.toString();
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192 }
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193
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194 public Map<String, String> extras() {
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195 return extras;
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196 }
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197
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198 public String branch() {
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199 return extras.get("branch");
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200 }
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201
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202 @Override
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203 public String toString() {
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204 StringBuilder sb = new StringBuilder();
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205 sb.append("Changeset {");
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206 sb.append("User: ").append(user).append(", ");
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207 sb.append("Comment: ").append(comment).append(", ");
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208 sb.append("Manifest: ").append(manifest).append(", ");
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209 sb.append("Date: ").append(time).append(", ");
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210 sb.append("Files: ").append(files.size());
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211 for (String s : files) {
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212 sb.append(", ").append(s);
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213 }
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214 if (extras != null) {
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215 sb.append(", Extra: ").append(extras);
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216 }
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217 sb.append("}");
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218 return sb.toString();
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219 }
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220
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221 @Override
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222 public RawChangeset clone() {
153
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223 try {
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224 return (RawChangeset) super.clone();
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225 } catch (CloneNotSupportedException ex) {
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226 throw new InternalError(ex.toString());
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227 }
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228 }
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229
427
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230 /*package*/ static RawChangeset parse(DataAccess da) throws IOException, HgInvalidDataFormatException {
365
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231 byte[] data = da.byteArray();
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232 RawChangeset rv = new RawChangeset();
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233 rv.init(data, 0, data.length, null);
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234 return rv;
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235 }
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236
196
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237 // @param usersPool - it's likely user names get repeated again and again throughout repository. can be null
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238 /* package-local */void init(byte[] data, int offset, int length, Pool<String> usersPool) throws HgInvalidDataFormatException {
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239 final int bufferEndIndex = offset + length;
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240 final byte lineBreak = (byte) '\n';
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241 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex);
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242 if (breakIndex1 == -1) {
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243 throw new HgInvalidDataFormatException("Bad Changeset data");
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244 }
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245 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1);
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246 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex);
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247 if (breakIndex2 == -1) {
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248 throw new HgInvalidDataFormatException("Bad Changeset data");
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249 }
589
c18095eedde0 Username in changeset uses UTF-8, not system encoding
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250 String _user;
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251 try {
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252 // TODO use encoding helper? Although where encoding is fixed (like here), seems to be just too much
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253 _user = new String(data, breakIndex1 + 1, breakIndex2 - breakIndex1 - 1, "UTF-8");
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254 if (usersPool != null) {
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255 _user = usersPool.unify(_user);
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256 }
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257 } catch (UnsupportedEncodingException ex) {
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258 _user = "";
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259 // Could hardly happen
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260 throw new HgInvalidDataFormatException("Bad Changeset data", ex);
196
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261 }
589
c18095eedde0 Username in changeset uses UTF-8, not system encoding
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262
153
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263 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex);
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264 if (breakIndex3 == -1) {
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265 throw new HgInvalidDataFormatException("Bad Changeset data");
153
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266 }
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267 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1);
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268 int space1 = _timeString.indexOf(' ');
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269 if (space1 == -1) {
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270 throw new HgInvalidDataFormatException(String.format("Bad Changeset data: %s in [%d..%d]", "time string", breakIndex2+1, breakIndex3));
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271 }
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272 int space2 = _timeString.indexOf(' ', space1 + 1);
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273 if (space2 == -1) {
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274 space2 = _timeString.length();
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275 }
363
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276 long unixTime = Long.parseLong(_timeString.substring(0, space1));
153
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277 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2));
363
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278 // unixTime is local time, and timezone records difference of the local time to UTC.
153
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279 Date _time = new Date(unixTime * 1000);
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280 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null;
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281 Map<String, String> _extrasMap;
252
a6d19adc2636 HgRepository.getWorkingCopyBranchName() to retrieve branch associated with working directory
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282 final String extras_branch_key = "branch";
386
73e875154afb Do not fail with empty extras string in changeset
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283 if (_extras == null || _extras.trim().length() == 0) {
252
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284 _extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME);
153
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285 } else {
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286 _extrasMap = new HashMap<String, String>();
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287 for (String pair : _extras.split("\00")) {
363
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288 pair = decode(pair);
153
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289 int eq = pair.indexOf(':');
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290 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1));
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291 }
252
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292 if (!_extrasMap.containsKey(extras_branch_key)) {
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293 _extrasMap.put(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME);
153
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294 }
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295 _extrasMap = Collections.unmodifiableMap(_extrasMap);
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296 }
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297
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298 //
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299 int lastStart = breakIndex3 + 1;
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300 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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301 ArrayList<String> _files = null;
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302 if (breakIndex4 > lastStart) {
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303 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision)
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304 _files = new ArrayList<String>(5);
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305 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) {
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306 _files.add(new String(data, lastStart, breakIndex4 - lastStart));
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diff changeset
307 lastStart = breakIndex4 + 1;
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308 if (data[breakIndex4 + 1] == lineBreak) {
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309 // found \n\n
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310 break;
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diff changeset
311 } else {
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diff changeset
312 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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diff changeset
313 }
153
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314 }
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315 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) {
427
31a89587eb04 FIXMEs: consistent names, throws for commands and their handlers. Use of checked exceptions in hi-level api
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diff changeset
316 throw new HgInvalidDataFormatException("Bad Changeset data");
153
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317 }
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318 } else {
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319 breakIndex4--;
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320 }
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321 String _comment;
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322 try {
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323 _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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324 // TODO post-1.0 respect ui.fallbackencoding and try to decode if set; use EncodingHelper
153
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325 } catch (UnsupportedEncodingException ex) {
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diff changeset
326 _comment = "";
366
189dc6dc1c3e Use exceptions to expose errors reading mercurial data
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diff changeset
327 // Could hardly happen
427
31a89587eb04 FIXMEs: consistent names, throws for commands and their handlers. Use of checked exceptions in hi-level api
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diff changeset
328 throw new HgInvalidDataFormatException("Bad Changeset data", ex);
153
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329 }
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330 // change this instance at once, don't leave it partially changes in case of error
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331 this.manifest = _nodeid;
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332 this.user = _user;
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333 this.time = _time;
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334 this.timezone = _timezone;
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335 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files);
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diff changeset
336 this.comment = _comment;
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diff changeset
337 this.extras = _extrasMap;
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diff changeset
338 }
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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diff changeset
339
153
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diff changeset
340 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) {
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diff changeset
341 for (int i = startOffset; i < endIndex; i++) {
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diff changeset
342 if (src[i] == what) {
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diff changeset
343 return i;
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344 }
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diff changeset
345 }
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diff changeset
346 return -1;
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diff changeset
347 }
363
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
348
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
349 private static String decode(String s) {
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
350 if (s != null && s.indexOf('\\') != -1) {
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
351 // TestAuxUtilities#testChangelogExtrasDecode
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
352 return s.replace("\\\\", "\\").replace("\\n", "\n").replace("\\r", "\r").replace("\\0", "\00");
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diff changeset
353 }
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
354 return s;
d9dfa9fe9cec Decode escape sequences in changeset extras field
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diff changeset
355 }
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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diff changeset
356 }
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
357
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
358 private static class RawCsetCollector implements Inspector {
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diff changeset
359 final ArrayList<RawChangeset> result;
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diff changeset
360
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
361 public RawCsetCollector(int count) {
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diff changeset
362 result = new ArrayList<RawChangeset>(count > 0 ? count : 5);
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
363 }
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
364
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
365 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
366 result.add(cset.clone());
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diff changeset
367 }
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
368 }
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
369
520
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
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diff changeset
370 private static class RawCsetParser implements RevlogStream.Inspector, Adaptable {
196
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diff changeset
371
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diff changeset
372 private final Inspector inspector;
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diff changeset
373 private final Pool<String> usersPool;
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diff changeset
374 private final RawChangeset cset = new RawChangeset();
520
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diff changeset
375 // non-null when inspector uses high-level lifecycle entities (progress and/or cancel supports)
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diff changeset
376 private final LifecycleBridge lifecycleStub;
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diff changeset
377 // non-null when inspector relies on low-level lifecycle and is responsible
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diff changeset
378 // to proceed any possible high-level entities himself.
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diff changeset
379 private final Lifecycle inspectorLifecycle;
196
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diff changeset
380
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diff changeset
381 public RawCsetParser(HgChangelog.Inspector delegate) {
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diff changeset
382 assert delegate != null;
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diff changeset
383 inspector = delegate;
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diff changeset
384 usersPool = new Pool<String>();
520
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
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diff changeset
385 inspectorLifecycle = Adaptable.Factory.getAdapter(delegate, Lifecycle.class, null);
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diff changeset
386 if (inspectorLifecycle == null) {
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diff changeset
387 ProgressSupport ph = Adaptable.Factory.getAdapter(delegate, ProgressSupport.class, null);
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diff changeset
388 CancelSupport cs = Adaptable.Factory.getAdapter(delegate, CancelSupport.class, null);
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
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diff changeset
389 if (cs != null || ph != null) {
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390 lifecycleStub = new LifecycleBridge(ph, cs);
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391 } else {
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392 lifecycleStub = null;
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393 }
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394 } else {
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395 lifecycleStub = null;
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396 }
196
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397 }
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398
423
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399 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) {
196
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400 try {
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401 byte[] data = da.byteArray();
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402 cset.init(data, 0, data.length, usersPool);
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403 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse
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404 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset);
520
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405 if (lifecycleStub != null) {
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406 lifecycleStub.nextStep();
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407 }
427
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408 } catch (HgInvalidDataFormatException ex) {
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409 throw ex.setRevisionIndex(revisionNumber);
366
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410 } catch (IOException ex) {
423
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411 // XXX need better exception, perhaps smth like HgChangelogException (extends HgInvalidControlFileException)
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412 throw new HgInvalidControlFileException("Failed reading changelog", ex, null).setRevisionIndex(revisionNumber);
196
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413 }
520
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414 }
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415
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416 public <T> T getAdapter(Class<T> adapterClass) {
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417 if (adapterClass == Lifecycle.class) {
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418 if (inspectorLifecycle != null) {
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419 return adapterClass.cast(inspectorLifecycle);
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420 }
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421 // reveal interest in lifecycle only when either progress or cancel support is there
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422 // and inspector itself doesn't respond to lifecycle request
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423 // lifecycleStub may still be null here (no progress and cancel), it's ok to cast(null)
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424 return adapterClass.cast(lifecycleStub);
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425
312
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426 }
520
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427 return Adaptable.Factory.getAdapter(inspector, adapterClass, null);
312
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428 }
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429
196
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430 }
0
dbd663faec1f Basic changelog parsing
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431 }