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annotate src/com/tmate/hgkit/ll/StatusCollector.java @ 64:19e9e220bf68

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Convenient commands constitute hi-level API. org.tmatesoft namespace, GPL2 statement
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 21 Jan 2011 05:56:43 +0100
parents b771e94a4f7c
children 0e499fed9b3d
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 java.util.Collection;
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7 import java.util.Collections;
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8 import java.util.HashMap;
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9 import java.util.LinkedHashMap;
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10 import java.util.LinkedList;
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11 import java.util.List;
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12 import java.util.Map;
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13 import java.util.TreeSet;
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14
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15 /**
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16 * RevisionWalker?
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17 * @author artem
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18 */
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19 public class StatusCollector {
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20
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21 private final HgRepository repo;
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22 private final Map<Integer, ManifestRevisionInspector> cache; // sparse array, in fact
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23
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24 public StatusCollector(HgRepository hgRepo) {
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25 this.repo = hgRepo;
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26 cache = new HashMap<Integer, ManifestRevisionInspector>();
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27 ManifestRevisionInspector emptyFakeState = new ManifestRevisionInspector(-1, -1);
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28 emptyFakeState.begin(-1, null);
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29 emptyFakeState.end(-1);
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30 cache.put(-1, emptyFakeState);
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31 }
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32
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33 public HgRepository getRepo() {
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34 return repo;
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35 }
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36
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37 private ManifestRevisionInspector get(int rev) {
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38 ManifestRevisionInspector i = cache.get(rev);
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39 if (i == null) {
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40 i = new ManifestRevisionInspector(rev, rev);
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41 cache.put(rev, i);
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42 repo.getManifest().walk(rev, rev, i);
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43 }
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44 return i;
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45 }
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46
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47 /*package-local*/ ManifestRevisionInspector raw(int rev) {
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48 return get(rev);
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49 }
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50
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51 // hg status --change <rev>
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52 public void change(int rev, Inspector inspector) {
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53 int[] parents = new int[2];
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54 repo.getChangelog().parents(rev, parents, null, null);
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55 walk(parents[0], rev, inspector);
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56 }
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57
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58 // I assume revision numbers are the same for changelog and manifest - here
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59 // user would like to pass changelog revision numbers, and I use them directly to walk manifest.
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60 // if this assumption is wrong, fix this (lookup manifest revisions from changeset).
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61 public void walk(int rev1, int rev2, Inspector inspector) {
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62 if (rev1 == rev2) {
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63 throw new IllegalArgumentException();
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64 }
64
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65 if (inspector == null) {
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66 throw new IllegalArgumentException();
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67 }
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68 if (inspector instanceof Record) {
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69 ((Record) inspector).init(rev1, rev2, this);
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70 }
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71 // in fact, rev1 and rev2 are often next (or close) to each other,
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72 // thus, we can optimize Manifest reads here (manifest.walk(rev1, rev2))
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73 ManifestRevisionInspector r1, r2;
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74 if (!cache.containsKey(rev1) && !cache.containsKey(rev2) && Math.abs(rev1 - rev2) < 5 /*subjective equivalent of 'close enough'*/) {
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75 int minRev = rev1 < rev2 ? rev1 : rev2;
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76 int maxRev = minRev == rev1 ? rev2 : rev1;
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77 r1 = r2 = new ManifestRevisionInspector(minRev, maxRev);
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78 for (int i = minRev; i <= maxRev; i++) {
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79 cache.put(i, r1);
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80 }
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81 repo.getManifest().walk(minRev, maxRev, r1);
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82 } else {
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83 r1 = get(rev1);
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84 r2 = get(rev2);
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85 }
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86
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87 TreeSet<String> r1Files = new TreeSet<String>(r1.files(rev1));
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88 for (String fname : r2.files(rev2)) {
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89 if (r1Files.remove(fname)) {
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90 Nodeid nidR1 = r1.nodeid(rev1, fname);
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91 Nodeid nidR2 = r2.nodeid(rev2, fname);
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92 String flagsR1 = r1.flags(rev1, fname);
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93 String flagsR2 = r2.flags(rev2, fname);
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94 if (nidR1.equals(nidR2) && ((flagsR2 == null && flagsR1 == null) || flagsR2.equals(flagsR1))) {
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95 inspector.clean(fname);
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96 } else {
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97 inspector.modified(fname);
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98 }
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99 } else {
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100 inspector.added(fname);
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101 }
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102 }
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103 for (String left : r1Files) {
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104 inspector.removed(left);
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105 }
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106 // inspector.done() if useful e.g. in UI client
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107 }
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108
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109 public Record status(int rev1, int rev2) {
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110 Record rv = new Record();
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111 walk(rev1, rev2, rv);
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112 return rv;
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113 }
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114
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115 public interface Inspector {
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116 void modified(String fname);
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117 void added(String fname);
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118 void copied(String fnameOrigin, String fnameAdded); // if copied files of no interest, should delegate to self.added(fnameAdded);
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119 void removed(String fname);
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120 void clean(String fname);
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121 void missing(String fname); // aka deleted (tracked by Hg, but not available in FS any more
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122 void unknown(String fname); // not tracked
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123 void ignored(String fname);
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124 }
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125
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126 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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127 public static class Record implements Inspector {
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128 private List<String> modified, added, removed, clean, missing, unknown, ignored;
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129 private Map<String, String> copied;
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130
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131 private int startRev, endRev;
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132 private StatusCollector statusHelper;
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133
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134 // XXX StatusCollector may additionally initialize Record instance to speed lookup of changed file revisions
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135 // here I need access to ManifestRevisionInspector via #raw(). Perhaps, non-static class (to get
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136 // implicit reference to StatusCollector) may be better?
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137 // Since users may want to reuse Record instance we've once created (and initialized), we need to
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138 // ensure functionality is correct for each/any call (#walk checks instanceof Record and fixes it up)
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139 // Perhaps, distinct helper (sc.getRevisionHelper().nodeid(fname)) would be better, just not clear
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140 // how to supply [start..end] values there easily
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141 /*package-local*/void init(int startRevision, int endRevision, StatusCollector self) {
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142 startRev = startRevision;
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143 endRev = endRevision;
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144 statusHelper = self;
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145 }
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146
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147 public Nodeid nodeidBeforeChange(String fname) {
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148 if ((modified == null || !modified.contains(fname)) && (removed == null || !removed.contains(fname))) {
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149 return null;
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150 }
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151 return statusHelper.raw(startRev).nodeid(startRev, fname);
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152 }
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153 public Nodeid nodeidAfterChange(String fname) {
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154 if ((modified == null || !modified.contains(fname)) && (added == null || !added.contains(fname))) {
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155 return null;
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156 }
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157 return statusHelper.raw(endRev).nodeid(endRev, fname);
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158 }
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159
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160 public List<String> getModified() {
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161 return proper(modified);
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162 }
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163
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164 public List<String> getAdded() {
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165 return proper(added);
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166 }
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167
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168 public List<String> getRemoved() {
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169 return proper(removed);
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170 }
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171
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172 public Map<String,String> getCopied() {
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173 if (copied == null) {
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174 return Collections.emptyMap();
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175 }
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176 return Collections.unmodifiableMap(copied);
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177 }
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178
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179 public List<String> getClean() {
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180 return proper(clean);
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181 }
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182
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183 public List<String> getMissing() {
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184 return proper(missing);
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185 }
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186
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187 public List<String> getUnknown() {
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188 return proper(unknown);
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189 }
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190
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191 public List<String> getIgnored() {
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192 return proper(ignored);
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193 }
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194
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195 private List<String> proper(List<String> l) {
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196 if (l == null) {
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197 return Collections.emptyList();
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198 }
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199 return Collections.unmodifiableList(l);
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200 }
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201
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202 //
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203 //
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204
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205 public void modified(String fname) {
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206 modified = doAdd(modified, fname);
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207 }
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208
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209 public void added(String fname) {
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210 added = doAdd(added, fname);
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211 }
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212
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213 public void copied(String fnameOrigin, String fnameAdded) {
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214 if (copied == null) {
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215 copied = new LinkedHashMap<String, String>();
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216 }
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217 copied.put(fnameOrigin, fnameAdded);
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218 }
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219
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220 public void removed(String fname) {
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221 removed = doAdd(removed, fname);
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222 }
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223
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224 public void clean(String fname) {
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225 clean = doAdd(clean, fname);
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226 }
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227
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228 public void missing(String fname) {
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229 missing = doAdd(missing, fname);
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230 }
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231
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232 public void unknown(String fname) {
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233 unknown = doAdd(unknown, fname);
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234 }
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235
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236 public void ignored(String fname) {
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237 ignored = doAdd(ignored, fname);
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238 }
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239
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240 private static List<String> doAdd(List<String> l, String s) {
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241 if (l == null) {
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242 l = new LinkedList<String>();
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243 }
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244 l.add(s);
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245 return l;
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246 }
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247 }
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248
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249 // XXX in fact, indexed access brings more trouble than benefits, get rid of it? Distinct instance per revision is good enough
55
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250 public /*XXX private, actually. Made public unless repo.statusLocal finds better place*/ static final class ManifestRevisionInspector implements HgManifest.Inspector {
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251 private final HashMap<String, Nodeid>[] idsMap;
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252 private final HashMap<String, String>[] flagsMap;
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253 private final int baseRevision;
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254 private int r = -1; // cursor
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255
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256 /**
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257 * [minRev, maxRev]
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258 * [-1,-1] also accepted (for fake empty instance)
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259 * @param minRev - inclusive
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260 * @param maxRev - inclusive
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261 */
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262 @SuppressWarnings("unchecked")
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263 public ManifestRevisionInspector(int minRev, int maxRev) {
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264 baseRevision = minRev;
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265 int range = maxRev - minRev + 1;
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266 idsMap = new HashMap[range];
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267 flagsMap = new HashMap[range];
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268 }
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269
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270 public Collection<String> files(int rev) {
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271 if (rev < baseRevision || rev >= baseRevision + idsMap.length) {
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272 throw new IllegalArgumentException();
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273 }
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274 return idsMap[rev - baseRevision].keySet();
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275 }
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276
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277 public Nodeid nodeid(int rev, String fname) {
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278 if (rev < baseRevision || rev >= baseRevision + idsMap.length) {
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279 throw new IllegalArgumentException();
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280 }
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281 return idsMap[rev - baseRevision].get(fname);
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282 }
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283
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284 public String flags(int rev, String fname) {
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285 if (rev < baseRevision || rev >= baseRevision + idsMap.length) {
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286 throw new IllegalArgumentException();
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287 }
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288 return flagsMap[rev - baseRevision].get(fname);
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289 }
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290
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291 //
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292
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293 public boolean next(Nodeid nid, String fname, String flags) {
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294 idsMap[r].put(fname, nid);
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295 flagsMap[r].put(fname, flags);
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296 return true;
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297 }
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298
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299 public boolean end(int revision) {
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300 assert revision == r + baseRevision;
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301 r = -1;
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302 return revision+1 < baseRevision + idsMap.length;
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303 }
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304
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305 public boolean begin(int revision, Nodeid nid) {
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306 if (revision < baseRevision || revision >= baseRevision + idsMap.length) {
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307 throw new IllegalArgumentException();
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308 }
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309 r = revision - baseRevision;
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310 idsMap[r] = new HashMap<String, Nodeid>();
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311 flagsMap[r] = new HashMap<String, String>();
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312 return true;
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313 }
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314 }
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315
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316 }