Mercurial > hg4j

annotate src/org/tmatesoft/hg/core/HgLogCommand.java @ 158:b413b16d10a5

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Integer offsets and file length explictly, rather than casts throughout code. Inflater may benefit from total length hint, but shall calculate it by its own if needed
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 09 Mar 2011 13:16:37 +0100
parents d5268ca7715b
children 37f3d4a596e4
rev   line source
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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.core;
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19 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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21 import java.io.IOException;
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22 import java.util.Calendar;
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23 import java.util.Collections;
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24 import java.util.ConcurrentModificationException;
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25 import java.util.LinkedList;
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26 import java.util.List;
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27 import java.util.Set;
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28 import java.util.TreeSet;
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29
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30 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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31 import org.tmatesoft.hg.repo.HgChangelog;
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32 import org.tmatesoft.hg.repo.HgDataFile;
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33 import org.tmatesoft.hg.repo.HgRepository;
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34 import org.tmatesoft.hg.repo.HgStatusCollector;
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35 import org.tmatesoft.hg.util.ByteChannel;
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36 import org.tmatesoft.hg.util.CancelledException;
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37 import org.tmatesoft.hg.util.Path;
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38 import org.tmatesoft.hg.util.PathPool;
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39 import org.tmatesoft.hg.util.PathRewrite;
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42 /**
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43 * Access to changelog, 'hg log' command counterpart.
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44 *
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45 * <pre>
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46 * Usage:
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47 * new LogCommand().limit(20).branch("maintenance-2.1").user("me").execute(new MyHandler());
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48 * </pre>
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49 * Not thread-safe (each thread has to use own {@link HgLogCommand} instance).
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50 *
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51 * @author Artem Tikhomirov
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52 * @author TMate Software Ltd.
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53 */
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54 public class HgLogCommand implements HgChangelog.Inspector {
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56 private final HgRepository repo;
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57 private Set<String> users;
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58 private Set<String> branches;
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59 private int limit = 0, count = 0;
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60 private int startRev = 0, endRev = TIP;
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61 private Handler delegate;
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62 private Calendar date;
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63 private Path file;
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64 private boolean followHistory; // makes sense only when file != null
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65 private HgChangeset changeset;
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66
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67 public HgLogCommand(HgRepository hgRepo) {
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68 repo = hgRepo;
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69 }
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71 /**
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72 * Limit search to specified user. Multiple user names may be specified. Once set, user names can't be
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73 * cleared, use new command instance in such cases.
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74 * @param user - full or partial name of the user, case-insensitive, non-null.
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75 * @return <code>this</code> instance for convenience
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76 * @throws IllegalArgumentException when argument is null
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77 */
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78 public HgLogCommand user(String user) {
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79 if (user == null) {
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80 throw new IllegalArgumentException();
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81 }
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82 if (users == null) {
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83 users = new TreeSet<String>();
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84 }
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85 users.add(user.toLowerCase());
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86 return this;
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87 }
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89 /**
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90 * Limit search to specified branch. Multiple branch specification possible (changeset from any of these
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91 * would be included in result). If unspecified, all branches are considered. There's no way to clean branch selection
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92 * once set, create fresh new command instead.
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93 * @param branch - branch name, case-sensitive, non-null.
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94 * @return <code>this</code> instance for convenience
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95 * @throws IllegalArgumentException when branch argument is null
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96 */
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97 public HgLogCommand branch(String branch) {
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98 if (branch == null) {
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99 throw new IllegalArgumentException();
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100 }
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101 if (branches == null) {
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102 branches = new TreeSet<String>();
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103 }
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104 branches.add(branch);
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105 return this;
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106 }
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108 // limit search to specific date
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109 // multiple?
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110 public HgLogCommand date(Calendar date) {
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111 this.date = date;
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112 // FIXME implement
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113 // isSet(field) - false => don't use in detection of 'same date'
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114 throw HgRepository.notImplemented();
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115 }
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116
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117 /**
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118 *
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119 * @param num - number of changeset to produce. Pass 0 to clear the limit.
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120 * @return <code>this</code> instance for convenience
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121 */
131
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122 public HgLogCommand limit(int num) {
64
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123 limit = num;
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124 return this;
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125 }
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126
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127 /**
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128 * Limit to specified subset of Changelog, [min(rev1,rev2), max(rev1,rev2)], inclusive.
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129 * Revision may be specified with {@link HgRepository#TIP}
148
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130 * @param rev1 - local revision number
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131 * @param rev2 - local revision number
64
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132 * @return <code>this</code> instance for convenience
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133 */
131
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134 public HgLogCommand range(int rev1, int rev2) {
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135 if (rev1 != TIP && rev2 != TIP) {
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136 startRev = rev2 < rev1 ? rev2 : rev1;
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137 endRev = startRev == rev2 ? rev1 : rev2;
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138 } else if (rev1 == TIP && rev2 != TIP) {
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139 startRev = rev2;
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140 endRev = rev1;
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141 } else {
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142 startRev = rev1;
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143 endRev = rev2;
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144 }
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145 return this;
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146 }
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147
77
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148 /**
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149 * Visit history of a given file only.
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150 * @param file path relative to repository root. Pass <code>null</code> to reset.
80
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151 * @param followCopyRename true to report changesets of the original file(-s), if copy/rename ever occured to the file.
77
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diff changeset
152 */
131
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153 public HgLogCommand file(Path file, boolean followCopyRename) {
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154 // multiple? Bad idea, would need to include extra method into Handler to tell start of next file
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155 this.file = file;
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156 followHistory = followCopyRename;
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157 return this;
64
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158 }
142
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159
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160 /**
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161 * Handy analog of {@link #file(Path, boolean)} when clients' paths come from filesystem and need conversion to repository's
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162 */
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163 public HgLogCommand file(String file, boolean followCopyRename) {
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164 return file(Path.create(repo.getToRepoPathHelper().rewrite(file)), followCopyRename);
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165 }
64
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166
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167 /**
154
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168 * Similar to {@link #execute(org.tmatesoft.hg.repo.RawChangeset.Inspector)}, collects and return result as a list.
64
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169 */
157
d5268ca7715b Merged branch wrap-data-access into default for resource-friendly data access. Updated API to promote that friendliness to clients (channels, not byte[]). More exceptions
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170 public List<HgChangeset> execute() throws HgException {
64
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171 CollectHandler collector = new CollectHandler();
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172 execute(collector);
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173 return collector.getChanges();
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174 }
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175
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176 /**
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177 *
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178 * @param inspector
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179 * @throws IllegalArgumentException when inspector argument is null
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180 * @throws ConcurrentModificationException if this log command instance is already running
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181 */
157
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diff changeset
182 public void execute(Handler handler) throws HgException {
64
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183 if (handler == null) {
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184 throw new IllegalArgumentException();
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185 }
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186 if (delegate != null) {
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187 throw new ConcurrentModificationException();
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188 }
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189 try {
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190 delegate = handler;
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191 count = 0;
142
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diff changeset
192 HgStatusCollector statusCollector = new HgStatusCollector(repo);
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193 // files listed in a changeset don't need their names to be rewritten (they are normalized already)
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194 PathPool pp = new PathPool(new PathRewrite.Empty());
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195 // #file(String, boolean) above may utilize PathPool as well. CommandContext?
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diff changeset
196 statusCollector.setPathPool(pp);
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diff changeset
197 changeset = new HgChangeset(statusCollector, pp);
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diff changeset
198 if (file == null) {
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diff changeset
199 repo.getChangelog().range(startRev, endRev, this);
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diff changeset
200 } else {
80
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201 HgDataFile fileNode = repo.getFileNode(file);
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diff changeset
202 fileNode.history(startRev, endRev, this);
126
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diff changeset
203 if (fileNode.isCopy()) {
80
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diff changeset
204 // even if we do not follow history, report file rename
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diff changeset
205 do {
126
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diff changeset
206 if (handler instanceof FileHistoryHandler) {
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diff changeset
207 FileRevision src = new FileRevision(repo, fileNode.getCopySourceRevision(), fileNode.getCopySourceName());
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diff changeset
208 FileRevision dst = new FileRevision(repo, fileNode.getRevision(0), fileNode.getPath());
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diff changeset
209 ((FileHistoryHandler) handler).copy(src, dst);
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diff changeset
210 }
80
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diff changeset
211 if (limit > 0 && count >= limit) {
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diff changeset
212 // if limit reach, follow is useless.
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diff changeset
213 break;
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diff changeset
214 }
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diff changeset
215 if (followHistory) {
126
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diff changeset
216 fileNode = repo.getFileNode(fileNode.getCopySourceName());
80
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diff changeset
217 fileNode.history(this);
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diff changeset
218 }
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diff changeset
219 } while (followHistory && fileNode.isCopy());
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diff changeset
220 }
77
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diff changeset
221 }
64
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222 } finally {
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diff changeset
223 delegate = null;
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diff changeset
224 changeset = null;
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225 }
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226 }
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227
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228 //
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diff changeset
229
154
ba2bf656f00f Changeset => RawChangeset
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diff changeset
230 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
64
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diff changeset
231 if (limit > 0 && count >= limit) {
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diff changeset
232 return;
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diff changeset
233 }
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234 if (branches != null && !branches.contains(cset.branch())) {
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235 return;
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236 }
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237 if (users != null) {
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238 String csetUser = cset.user().toLowerCase();
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239 boolean found = false;
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240 for (String u : users) {
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241 if (csetUser.indexOf(u) != -1) {
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242 found = true;
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243 break;
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244 }
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245 }
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246 if (!found) {
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247 return;
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248 }
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249 }
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250 if (date != null) {
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251 // FIXME
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252 }
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253 count++;
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254 changeset.init(revisionNumber, nodeid, cset);
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255 delegate.next(changeset);
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256 }
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257
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258 public interface Handler {
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259 /**
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260 * @param changeset not necessarily a distinct instance each time, {@link HgChangeset#clone() clone()} if need a copy.
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261 */
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262 void next(HgChangeset changeset);
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263 }
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264
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265 /**
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266 * When {@link HgLogCommand} is executed against file, handler passed to {@link HgLogCommand#execute(Handler)} may optionally
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267 * implement this interface to get information about file renames. Method {@link #copy(FileRevision, FileRevision)} would
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268 * get invoked prior any changeset of the original file (if file history being followed) is reported via {@link #next(HgChangeset)}.
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269 *
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270 * For {@link HgLogCommand#file(Path, boolean)} with renamed file path and follow argument set to false,
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271 * {@link #copy(FileRevision, FileRevision)} would be invoked for the first copy/rename in the history of the file, but not
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272 * followed by any changesets.
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273 *
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274 * @author Artem Tikhomirov
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275 * @author TMate Software Ltd.
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276 */
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277 public interface FileHistoryHandler extends Handler {
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278 // XXX perhaps, should distinguish copy from rename? And what about merged revisions and following them?
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279 void copy(FileRevision from, FileRevision to);
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280 }
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281
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282 public static class CollectHandler implements Handler {
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283 private final List<HgChangeset> result = new LinkedList<HgChangeset>();
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284
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285 public List<HgChangeset> getChanges() {
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286 return Collections.unmodifiableList(result);
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287 }
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288
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289 public void next(HgChangeset changeset) {
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290 result.add(changeset.clone());
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291 }
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292 }
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293
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294 public static final class FileRevision {
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295 private final HgRepository repo;
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296 private final Nodeid revision;
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297 private final Path path;
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298
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299 /*package-local*/FileRevision(HgRepository hgRepo, Nodeid rev, Path p) {
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300 if (hgRepo == null || rev == null || p == null) {
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301 // since it's package local, it is our code to blame for non validated arguments
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302 throw new HgBadStateException();
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303 }
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304 repo = hgRepo;
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305 revision = rev;
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306 path = p;
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307 }
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308
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309 public Path getPath() {
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310 return path;
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311 }
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312 public Nodeid getRevision() {
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313 return revision;
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314 }
157
d5268ca7715b Merged branch wrap-data-access into default for resource-friendly data access. Updated API to promote that friendliness to clients (channels, not byte[]). More exceptions
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315 public void putContentTo(ByteChannel sink) throws HgDataStreamException, IOException, CancelledException {
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316 HgDataFile fn = repo.getFileNode(path);
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317 int localRevision = fn.getLocalRevision(revision);
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diff changeset
318 fn.contentWithFilters(localRevision, sink);
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319 }
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320 }
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321 }