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annotate src/org/tmatesoft/hg/core/RepositoryTreeWalker.java @ 72:9a03a80a0f2f

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Command-line frontend moved to separate source root with new package statement
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sun, 23 Jan 2011 03:46:59 +0100
parents 64bddc2dcc0e
children 6f1b88693d48
rev   line source
64
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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 com.tmate.hgkit.ll.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.util.PathPool;
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28
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29 import com.tmate.hgkit.ll.HgManifest;
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30 import com.tmate.hgkit.ll.HgRepository;
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31 import com.tmate.hgkit.ll.Nodeid;
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32
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33 /**
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34 *
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35 * @author Artem Tikhomirov
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36 * @author TMate Software Ltd.
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37 */
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38 public class RepositoryTreeWalker {
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39
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40 private final HgRepository repo;
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41 private Path.Matcher matcher;
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42 private int startRev = 0, endRev = TIP;
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43 private Handler visitor;
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44 private boolean needDirs = false;
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45
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46 private final Mediator mediator = new Mediator();
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47
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48 public RepositoryTreeWalker(HgRepository hgRepo) {
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49 this.repo = hgRepo;
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50 }
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51
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52 public RepositoryTreeWalker range(int rev1, int rev2) {
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53 // if manifest range is different from that of changelog, need conversion utils (external?)
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54 throw HgRepository.notImplemented();
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55 }
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56
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57 public RepositoryTreeWalker revision(int rev) {
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58 startRev = endRev = rev;
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59 return this;
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60 }
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61
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62 public RepositoryTreeWalker dirs(boolean include) {
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63 // XXX whether directories with directories only are include or not
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64 // now lists only directories with files
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65 needDirs = include;
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66 return this;
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67 }
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68
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69 /**
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70 * Limit manifest walk to a subset of files.
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71 * @param pathMatcher - filter, pass <code>null</code> to clear.
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72 * @return <code>this</code> instance for convenience
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73 */
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74 public RepositoryTreeWalker match(Path.Matcher pathMatcher) {
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75 matcher = pathMatcher;
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76 return this;
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77 }
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78
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79 public void walk(Handler handler) {
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80 if (handler == null) {
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81 throw new IllegalArgumentException();
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82 }
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83 if (visitor != null) {
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84 throw new ConcurrentModificationException();
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85 }
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86 try {
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87 visitor = handler;
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88 mediator.start();
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89 repo.getManifest().walk(startRev, endRev, mediator);
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90 } finally {
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91 visitor = null;
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92 mediator.done();
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93 }
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94 }
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95
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96 /**
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97 * Callback to walk file/directory tree of a revision
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98 */
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99 public interface Handler {
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100 void begin(Nodeid manifestRevision);
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101 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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102 void file(FileRevision fileRevision); // XXX allow to check p is invalid (df.exists())
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103 void end(Nodeid manifestRevision);
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104 }
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105
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106 // I'd rather let RepositoryTreeWalker implement HgManifest.Inspector directly, but this pollutes API alot
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107 private class Mediator implements HgManifest.Inspector {
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108 private PathPool pathPool;
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109 private List<FileRevision> manifestContent;
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110 private Nodeid manifestNodeid;
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111
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112 public void start() {
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113 pathPool = new PathPool(repo.getPathHelper());
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114 }
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115
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116 public void done() {
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117 manifestContent = null;
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118 pathPool = null;
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119 }
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120
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121 public boolean begin(int revision, Nodeid nid) {
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122 if (needDirs && manifestContent == null) {
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123 manifestContent = new LinkedList<FileRevision>();
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124 }
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125 visitor.begin(manifestNodeid = nid);
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126 return true;
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127 }
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128 public boolean end(int revision) {
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129 if (needDirs) {
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130 LinkedHashMap<Path, LinkedList<FileRevision>> breakDown = new LinkedHashMap<Path, LinkedList<FileRevision>>();
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131 for (FileRevision fr : manifestContent) {
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132 Path filePath = fr.getPath();
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133 Path dirPath = pathPool.parent(filePath);
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134 LinkedList<FileRevision> revs = breakDown.get(dirPath);
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135 if (revs == null) {
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136 revs = new LinkedList<FileRevision>();
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137 breakDown.put(dirPath, revs);
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138 }
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139 revs.addLast(fr);
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140 }
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141 for (Path dir : breakDown.keySet()) {
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142 visitor.dir(dir);
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143 for (FileRevision fr : breakDown.get(dir)) {
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144 visitor.file(fr);
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145 }
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146 }
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147 manifestContent.clear();
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148 }
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149 visitor.end(manifestNodeid);
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150 manifestNodeid = null;
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151 return true;
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152 }
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153 public boolean next(Nodeid nid, String fname, String flags) {
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154 Path p = pathPool.path(fname);
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155 if (matcher != null && !matcher.accept(p)) {
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156 return true;
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157 }
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158 FileRevision fr = new FileRevision(repo, nid, p);
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159 if (needDirs) {
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160 manifestContent.add(fr);
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161 } else {
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162 visitor.file(fr);
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163 }
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164 return true;
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165 }
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166 }
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167 }