Mercurial > hg4j
annotate src/org/tmatesoft/hg/core/RepositoryTreeWalker.java @ 97:ee2c750b036d
Changelog to HgChangelog
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Thu, 27 Jan 2011 21:25:21 +0100 |
parents | bf304cb14247 |
children | a3a2e5deb320 |
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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@svnkit.com |
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16 */ |
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17 package org.tmatesoft.hg.core; |
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18 |
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19 import static org.tmatesoft.hg.repo.HgRepository.TIP; |
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20 |
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21 import java.util.ConcurrentModificationException; |
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22 import java.util.LinkedHashMap; |
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23 import java.util.LinkedList; |
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24 import java.util.List; |
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25 |
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26 import org.tmatesoft.hg.core.LogCommand.FileRevision; |
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27 import org.tmatesoft.hg.repo.HgManifest; |
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28 import org.tmatesoft.hg.repo.HgRepository; |
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29 import org.tmatesoft.hg.util.PathPool; |
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30 |
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31 |
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32 /** |
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33 * |
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34 * @author Artem Tikhomirov |
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35 * @author TMate Software Ltd. |
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36 */ |
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37 public class RepositoryTreeWalker { |
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38 |
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39 private final HgRepository repo; |
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40 private Path.Matcher matcher; |
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41 private int startRev = 0, endRev = TIP; |
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42 private Handler visitor; |
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43 private boolean needDirs = false; |
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44 |
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45 private final Mediator mediator = new Mediator(); |
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46 |
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47 public RepositoryTreeWalker(HgRepository hgRepo) { |
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48 this.repo = hgRepo; |
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49 } |
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50 |
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51 public RepositoryTreeWalker range(int rev1, int rev2) { |
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52 // if manifest range is different from that of changelog, need conversion utils (external?) |
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53 throw HgRepository.notImplemented(); |
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54 } |
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55 |
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56 public RepositoryTreeWalker revision(int rev) { |
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57 startRev = endRev = rev; |
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58 return this; |
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59 } |
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60 |
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61 public RepositoryTreeWalker dirs(boolean include) { |
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62 // XXX whether directories with directories only are include or not |
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63 // now lists only directories with files |
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64 needDirs = include; |
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65 return this; |
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66 } |
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67 |
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68 /** |
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69 * Limit manifest walk to a subset of files. |
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70 * @param pathMatcher - filter, pass <code>null</code> to clear. |
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71 * @return <code>this</code> instance for convenience |
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72 */ |
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73 public RepositoryTreeWalker match(Path.Matcher pathMatcher) { |
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74 matcher = pathMatcher; |
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75 return this; |
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76 } |
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77 |
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78 public void walk(Handler handler) { |
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79 if (handler == null) { |
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80 throw new IllegalArgumentException(); |
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81 } |
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82 if (visitor != null) { |
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83 throw new ConcurrentModificationException(); |
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84 } |
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85 try { |
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86 visitor = handler; |
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87 mediator.start(); |
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88 repo.getManifest().walk(startRev, endRev, mediator); |
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89 } finally { |
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90 mediator.done(); |
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91 visitor = null; |
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92 } |
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93 } |
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94 |
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95 /** |
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96 * Callback to walk file/directory tree of a revision |
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97 */ |
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98 public interface Handler { |
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99 void begin(Nodeid manifestRevision); |
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100 void dir(Path p); // optionally invoked (if walker was configured to spit out directories) prior to any files from this dir and subdirs |
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101 void file(FileRevision fileRevision); // XXX allow to check p is invalid (df.exists()) |
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102 void end(Nodeid manifestRevision); |
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103 } |
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104 |
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105 // I'd rather let RepositoryTreeWalker implement HgManifest.Inspector directly, but this pollutes API alot |
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106 private class Mediator implements HgManifest.Inspector { |
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107 private PathPool pathPool; |
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108 private List<FileRevision> manifestContent; |
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109 private Nodeid manifestNodeid; |
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110 |
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111 public void start() { |
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112 pathPool = new PathPool(repo.getPathHelper()); |
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113 } |
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114 |
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115 public void done() { |
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116 manifestContent = null; |
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117 pathPool = null; |
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118 } |
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119 |
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120 public boolean begin(int revision, Nodeid nid) { |
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121 if (needDirs && manifestContent == null) { |
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122 manifestContent = new LinkedList<FileRevision>(); |
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123 } |
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124 visitor.begin(manifestNodeid = nid); |
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125 return true; |
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126 } |
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127 public boolean end(int revision) { |
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128 if (needDirs) { |
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129 LinkedHashMap<Path, LinkedList<FileRevision>> breakDown = new LinkedHashMap<Path, LinkedList<FileRevision>>(); |
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130 for (FileRevision fr : manifestContent) { |
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131 Path filePath = fr.getPath(); |
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132 Path dirPath = pathPool.parent(filePath); |
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133 LinkedList<FileRevision> revs = breakDown.get(dirPath); |
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134 if (revs == null) { |
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135 revs = new LinkedList<FileRevision>(); |
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136 breakDown.put(dirPath, revs); |
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137 } |
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138 revs.addLast(fr); |
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139 } |
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140 for (Path dir : breakDown.keySet()) { |
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141 visitor.dir(dir); |
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142 for (FileRevision fr : breakDown.get(dir)) { |
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143 visitor.file(fr); |
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144 } |
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145 } |
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146 manifestContent.clear(); |
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147 } |
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148 visitor.end(manifestNodeid); |
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149 manifestNodeid = null; |
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150 return true; |
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151 } |
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152 public boolean next(Nodeid nid, String fname, String flags) { |
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153 Path p = pathPool.path(fname); |
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154 if (matcher != null && !matcher.accept(p)) { |
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155 return true; |
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156 } |
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157 FileRevision fr = new FileRevision(repo, nid, p); |
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158 if (needDirs) { |
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159 manifestContent.add(fr); |
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160 } else { |
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161 visitor.file(fr); |
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162 } |
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163 return true; |
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164 } |
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165 } |
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166 } |