Mercurial > hg4j

annotate src/com/tmate/hgkit/ll/StatusCollector.java @ 69:5a69397f0f99

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Discovery utility for Hg network protocol finally in the repo, with quick-n-dirty ConfigFile impl that helps to hide auth info
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sat, 22 Jan 2011 22:53:57 +0100
parents 0e499fed9b3d
children
rev   line source
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1 /*
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2 * Copyright (c) 2011 Artem Tikhomirov
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3 */
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4 package com.tmate.hgkit.ll;
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5
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6 import static com.tmate.hgkit.ll.HgRepository.BAD_REVISION;
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7 import static com.tmate.hgkit.ll.HgRepository.TIP;
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8
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9 import java.util.Collection;
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10 import java.util.Collections;
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11 import java.util.HashMap;
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12 import java.util.LinkedHashMap;
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13 import java.util.LinkedList;
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14 import java.util.List;
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15 import java.util.Map;
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16 import java.util.TreeSet;
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17
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18 /**
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19 * RevisionWalker?
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20 * @author artem
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21 */
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22 public class StatusCollector {
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23
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24 private final HgRepository repo;
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25 private final Map<Integer, ManifestRevisionInspector> cache; // sparse array, in fact
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27 public StatusCollector(HgRepository hgRepo) {
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28 this.repo = hgRepo;
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29 cache = new HashMap<Integer, ManifestRevisionInspector>();
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30 ManifestRevisionInspector emptyFakeState = new ManifestRevisionInspector(-1, -1);
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31 emptyFakeState.begin(-1, null);
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32 emptyFakeState.end(-1); // FIXME HgRepo.TIP == -1 as well, need to distinguish fake "prior to first" revision from "the very last"
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33 cache.put(-1, emptyFakeState);
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34 }
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36 public HgRepository getRepo() {
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37 return repo;
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38 }
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40 private ManifestRevisionInspector get(int rev) {
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41 ManifestRevisionInspector i = cache.get(rev);
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42 if (i == null) {
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43 i = new ManifestRevisionInspector(rev, rev);
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44 cache.put(rev, i);
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45 repo.getManifest().walk(rev, rev, i);
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46 }
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47 return i;
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48 }
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50 /*package-local*/ ManifestRevisionInspector raw(int rev) {
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51 return get(rev);
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52 }
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54 // hg status --change <rev>
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55 public void change(int rev, Inspector inspector) {
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56 int[] parents = new int[2];
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57 repo.getChangelog().parents(rev, parents, null, null);
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58 walk(parents[0], rev, inspector);
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59 }
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61 // I assume revision numbers are the same for changelog and manifest - here
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62 // user would like to pass changelog revision numbers, and I use them directly to walk manifest.
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63 // if this assumption is wrong, fix this (lookup manifest revisions from changeset).
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64 public void walk(int rev1, int rev2, Inspector inspector) {
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65 if (rev1 == rev2) {
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66 throw new IllegalArgumentException();
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67 }
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68 if (inspector == null) {
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69 throw new IllegalArgumentException();
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70 }
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71 if (inspector instanceof Record) {
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72 ((Record) inspector).init(rev1, rev2, this);
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73 }
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74 if (rev1 == TIP) {
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75 rev1 = repo.getManifest().getRevisionCount() - 1;
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76 }
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77 if (rev2 == TIP) {
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78 rev2 = repo.getManifest().getRevisionCount() - 1; // XXX add Revlog.tip() func ?
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79 }
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80 // in fact, rev1 and rev2 are often next (or close) to each other,
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81 // thus, we can optimize Manifest reads here (manifest.walk(rev1, rev2))
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82 ManifestRevisionInspector r1, r2;
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83 if (!cache.containsKey(rev1) && !cache.containsKey(rev2) && Math.abs(rev1 - rev2) < 5 /*subjective equivalent of 'close enough'*/) {
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84 int minRev = rev1 < rev2 ? rev1 : rev2;
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85 int maxRev = minRev == rev1 ? rev2 : rev1;
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86 r1 = r2 = new ManifestRevisionInspector(minRev, maxRev);
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87 for (int i = minRev; i <= maxRev; i++) {
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88 cache.put(i, r1);
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89 }
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90 repo.getManifest().walk(minRev, maxRev, r1);
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91 } else {
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92 r1 = get(rev1);
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93 r2 = get(rev2);
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94 }
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95
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96 TreeSet<String> r1Files = new TreeSet<String>(r1.files(rev1));
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97 for (String fname : r2.files(rev2)) {
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98 if (r1Files.remove(fname)) {
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99 Nodeid nidR1 = r1.nodeid(rev1, fname);
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100 Nodeid nidR2 = r2.nodeid(rev2, fname);
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101 String flagsR1 = r1.flags(rev1, fname);
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102 String flagsR2 = r2.flags(rev2, fname);
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103 if (nidR1.equals(nidR2) && ((flagsR2 == null && flagsR1 == null) || flagsR2.equals(flagsR1))) {
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104 inspector.clean(fname);
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105 } else {
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106 inspector.modified(fname);
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107 }
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108 } else {
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109 inspector.added(fname);
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110 }
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111 }
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112 for (String left : r1Files) {
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113 inspector.removed(left);
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114 }
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115 // inspector.done() if useful e.g. in UI client
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116 }
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117
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118 public Record status(int rev1, int rev2) {
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119 Record rv = new Record();
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120 walk(rev1, rev2, rv);
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121 return rv;
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122 }
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123
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124 public interface Inspector {
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125 void modified(String fname);
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126 void added(String fname);
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127 void copied(String fnameOrigin, String fnameAdded); // if copied files of no interest, should delegate to self.added(fnameAdded);
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128 void removed(String fname);
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129 void clean(String fname);
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130 void missing(String fname); // aka deleted (tracked by Hg, but not available in FS any more
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131 void unknown(String fname); // not tracked
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132 void ignored(String fname);
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133 }
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134
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135 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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136 public static class Record implements Inspector {
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137 private List<String> modified, added, removed, clean, missing, unknown, ignored;
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138 private Map<String, String> copied;
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139
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140 private int startRev, endRev;
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141 private StatusCollector statusHelper;
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142
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143 // XXX StatusCollector may additionally initialize Record instance to speed lookup of changed file revisions
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144 // here I need access to ManifestRevisionInspector via #raw(). Perhaps, non-static class (to get
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145 // implicit reference to StatusCollector) may be better?
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146 // Since users may want to reuse Record instance we've once created (and initialized), we need to
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147 // ensure functionality is correct for each/any call (#walk checks instanceof Record and fixes it up)
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148 // Perhaps, distinct helper (sc.getRevisionHelper().nodeid(fname)) would be better, just not clear
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149 // how to supply [start..end] values there easily
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150 /*package-local*/void init(int startRevision, int endRevision, StatusCollector self) {
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151 startRev = startRevision;
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152 endRev = endRevision;
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153 statusHelper = self;
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154 }
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155
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156 public Nodeid nodeidBeforeChange(String fname) {
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157 if (statusHelper == null || startRev == BAD_REVISION) {
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158 return null;
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159 }
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160 if ((modified == null || !modified.contains(fname)) && (removed == null || !removed.contains(fname))) {
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161 return null;
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162 }
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163 return statusHelper.raw(startRev).nodeid(startRev, fname);
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164 }
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165 public Nodeid nodeidAfterChange(String fname) {
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166 if (statusHelper == null || endRev == BAD_REVISION) {
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167 return null;
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168 }
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169 if ((modified == null || !modified.contains(fname)) && (added == null || !added.contains(fname))) {
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170 return null;
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171 }
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172 return statusHelper.raw(endRev).nodeid(endRev, fname);
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173 }
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174
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175 public List<String> getModified() {
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176 return proper(modified);
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177 }
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178
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179 public List<String> getAdded() {
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180 return proper(added);
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181 }
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182
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183 public List<String> getRemoved() {
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184 return proper(removed);
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185 }
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186
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187 public Map<String,String> getCopied() {
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188 if (copied == null) {
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189 return Collections.emptyMap();
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190 }
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191 return Collections.unmodifiableMap(copied);
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192 }
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193
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194 public List<String> getClean() {
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195 return proper(clean);
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196 }
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197
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198 public List<String> getMissing() {
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199 return proper(missing);
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200 }
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201
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202 public List<String> getUnknown() {
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203 return proper(unknown);
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204 }
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205
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206 public List<String> getIgnored() {
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207 return proper(ignored);
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208 }
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209
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210 private List<String> proper(List<String> l) {
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211 if (l == null) {
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212 return Collections.emptyList();
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213 }
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214 return Collections.unmodifiableList(l);
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215 }
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216
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217 //
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218 //
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219
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220 public void modified(String fname) {
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221 modified = doAdd(modified, fname);
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222 }
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223
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224 public void added(String fname) {
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225 added = doAdd(added, fname);
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226 }
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227
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228 public void copied(String fnameOrigin, String fnameAdded) {
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229 if (copied == null) {
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230 copied = new LinkedHashMap<String, String>();
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231 }
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232 copied.put(fnameOrigin, fnameAdded);
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233 }
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234
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235 public void removed(String fname) {
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236 removed = doAdd(removed, fname);
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237 }
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238
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239 public void clean(String fname) {
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240 clean = doAdd(clean, fname);
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241 }
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242
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243 public void missing(String fname) {
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244 missing = doAdd(missing, fname);
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245 }
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246
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247 public void unknown(String fname) {
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248 unknown = doAdd(unknown, fname);
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249 }
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250
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251 public void ignored(String fname) {
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252 ignored = doAdd(ignored, fname);
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253 }
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254
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255 private static List<String> doAdd(List<String> l, String s) {
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256 if (l == null) {
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257 l = new LinkedList<String>();
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258 }
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259 l.add(s);
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260 return l;
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261 }
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262 }
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263
64
19e9e220bf68 Convenient commands constitute hi-level API. org.tmatesoft namespace, GPL2 statement
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264 // XXX in fact, indexed access brings more trouble than benefits, get rid of it? Distinct instance per revision is good enough
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265 public /*XXX private, actually. Made public unless repo.statusLocal finds better place*/ static final class ManifestRevisionInspector implements HgManifest.Inspector {
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266 private final HashMap<String, Nodeid>[] idsMap;
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267 private final HashMap<String, String>[] flagsMap;
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268 private final int baseRevision;
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269 private int r = -1; // cursor
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270
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271 /**
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272 * [minRev, maxRev]
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576d6e8a09f6 Analog of 'hg status --change' command
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273 * [-1,-1] also accepted (for fake empty instance)
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274 * @param minRev - inclusive
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275 * @param maxRev - inclusive
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276 */
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277 @SuppressWarnings("unchecked")
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278 public ManifestRevisionInspector(int minRev, int maxRev) {
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279 baseRevision = minRev;
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280 int range = maxRev - minRev + 1;
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281 idsMap = new HashMap[range];
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282 flagsMap = new HashMap[range];
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283 }
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284
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285 public Collection<String> files(int rev) {
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286 if (rev < baseRevision || rev >= baseRevision + idsMap.length) {
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287 throw new IllegalArgumentException();
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288 }
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289 return idsMap[rev - baseRevision].keySet();
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290 }
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291
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292 public Nodeid nodeid(int rev, String fname) {
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293 if (rev < baseRevision || rev >= baseRevision + idsMap.length) {
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294 throw new IllegalArgumentException();
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295 }
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296 return idsMap[rev - baseRevision].get(fname);
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297 }
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298
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299 public String flags(int rev, String fname) {
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300 if (rev < baseRevision || rev >= baseRevision + idsMap.length) {
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301 throw new IllegalArgumentException();
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302 }
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303 return flagsMap[rev - baseRevision].get(fname);
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304 }
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305
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306 //
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307
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308 public boolean next(Nodeid nid, String fname, String flags) {
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309 idsMap[r].put(fname, nid);
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310 flagsMap[r].put(fname, flags);
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311 return true;
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312 }
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313
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314 public boolean end(int revision) {
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315 assert revision == r + baseRevision;
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316 r = -1;
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317 return revision+1 < baseRevision + idsMap.length;
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318 }
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319
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320 public boolean begin(int revision, Nodeid nid) {
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321 if (revision < baseRevision || revision >= baseRevision + idsMap.length) {
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322 throw new IllegalArgumentException();
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323 }
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324 r = revision - baseRevision;
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325 idsMap[r] = new HashMap<String, Nodeid>();
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326 flagsMap[r] = new HashMap<String, String>();
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327 return true;
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328 }
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329 }
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330
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331 }