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annotate src/com/tmate/hgkit/ll/StatusCollector.java @ 55:05829a70b30b

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Status operation extracted into separate, cache-friendly class
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 17 Jan 2011 04:45:09 +0100
parents
children 576d6e8a09f6
rev   line source
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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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 }
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28
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29 private ManifestRevisionInspector get(int rev) {
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30 ManifestRevisionInspector i = cache.get(rev);
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31 if (i == null) {
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32 i = new ManifestRevisionInspector(rev, rev);
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33 cache.put(rev, i);
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34 repo.getManifest().walk(rev, rev, i);
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35 }
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36 return i;
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37 }
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38
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39 public void walk(int rev1, int rev2, Inspector inspector) {
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40 if (rev1 == rev2) {
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41 throw new IllegalArgumentException();
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42 }
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43 // in fact, rev1 and rev2 are often next (or close) to each other,
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44 // thus, we can optimize Manifest reads here (manifest.walk(rev1, rev2))
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45
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46 ManifestRevisionInspector r1, r2;
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47 if (!cache.containsKey(rev1) && !cache.containsKey(rev2) && Math.abs(rev1 - rev2) < 5 /*subjective equivalent of 'close enough'*/) {
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48 int minRev = rev1 < rev2 ? rev1 : rev2;
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49 int maxRev = minRev == rev1 ? rev2 : rev1;
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50 r1 = r2 = new ManifestRevisionInspector(minRev, maxRev);
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51 for (int i = minRev; i <= maxRev; i++) {
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52 cache.put(i, r1);
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53 }
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54 repo.getManifest().walk(minRev, maxRev, r1);
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55 } else {
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56 r1 = get(rev1);
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57 r2 = get(rev2);
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58 }
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59
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60 TreeSet<String> r1Files = new TreeSet<String>(r1.files(rev1));
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61 for (String fname : r2.files(rev2)) {
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62 if (r1Files.remove(fname)) {
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63 Nodeid nidR1 = r1.nodeid(rev1, fname);
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64 Nodeid nidR2 = r2.nodeid(rev2, fname);
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65 String flagsR1 = r1.flags(rev1, fname);
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66 String flagsR2 = r2.flags(rev2, fname);
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67 if (nidR1.equals(nidR2) && ((flagsR2 == null && flagsR1 == null) || flagsR2.equals(flagsR1))) {
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68 inspector.clean(fname);
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69 } else {
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70 inspector.modified(fname);
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71 }
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72 } else {
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73 inspector.added(fname);
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74 }
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75 }
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76 for (String left : r1Files) {
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77 inspector.removed(left);
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78 }
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79 // inspector.done() if useful e.g. in UI client
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80 }
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81
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82 public Record status(int rev1, int rev2) {
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83 Record rv = new Record();
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84 walk(rev1, rev2, rv);
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85 return rv;
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86 }
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87
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88 public interface Inspector {
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89 void modified(String fname);
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90 void added(String fname);
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91 void copied(String fnameOrigin, String fnameAdded); // if copied files of no interest, should delegate to self.added(fnameAdded);
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92 void removed(String fname);
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93 void clean(String fname);
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94 void missing(String fname); // aka deleted (tracked by Hg, but not available in FS any more
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95 void unknown(String fname); // not tracked
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96 void ignored(String fname);
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97 }
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98
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99 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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100 public static class Record implements Inspector {
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101 private List<String> modified, added, removed, clean, missing, unknown, ignored;
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102 private Map<String, String> copied;
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103
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104 public List<String> getModified() {
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105 return proper(modified);
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106 }
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107
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108 public List<String> getAdded() {
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109 return proper(added);
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110 }
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111
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112 public List<String> getRemoved() {
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113 return proper(removed);
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114 }
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115
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116 public Map<String,String> getCopied() {
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117 if (copied == null) {
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118 return Collections.emptyMap();
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119 }
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120 return Collections.unmodifiableMap(copied);
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121 }
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122
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123 public List<String> getClean() {
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124 return proper(clean);
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125 }
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126
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127 public List<String> getMissing() {
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128 return proper(missing);
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129 }
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130
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131 public List<String> getUnknown() {
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132 return proper(unknown);
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133 }
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134
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135 public List<String> getIgnored() {
05829a70b30b Status operation extracted into separate, cache-friendly class
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136 return proper(ignored);
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137 }
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138
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139 private List<String> proper(List<String> l) {
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140 if (l == null) {
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141 return Collections.emptyList();
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142 }
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143 return Collections.unmodifiableList(l);
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144 }
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145
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146 //
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147 //
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148
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149 public void modified(String fname) {
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150 modified = doAdd(modified, fname);
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151 }
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152
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153 public void added(String fname) {
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154 added = doAdd(added, fname);
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155 }
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156
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157 public void copied(String fnameOrigin, String fnameAdded) {
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158 if (copied == null) {
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159 copied = new LinkedHashMap<String, String>();
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160 }
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161 copied.put(fnameOrigin, fnameAdded);
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162 }
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163
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164 public void removed(String fname) {
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165 removed = doAdd(removed, fname);
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166 }
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167
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168 public void clean(String fname) {
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169 clean = doAdd(clean, fname);
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170 }
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171
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172 public void missing(String fname) {
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173 missing = doAdd(missing, fname);
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174 }
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175
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176 public void unknown(String fname) {
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177 unknown = doAdd(unknown, fname);
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178 }
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179
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180 public void ignored(String fname) {
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181 ignored = doAdd(ignored, fname);
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182 }
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183
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184 private static List<String> doAdd(List<String> l, String s) {
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185 if (l == null) {
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186 l = new LinkedList<String>();
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187 }
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188 l.add(s);
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189 return l;
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190 }
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191 }
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192
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193 public /*XXX private, actually. Made public unless repo.statusLocal finds better place*/ static final class ManifestRevisionInspector implements HgManifest.Inspector {
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194 private final HashMap<String, Nodeid>[] idsMap;
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195 private final HashMap<String, String>[] flagsMap;
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196 private final int baseRevision;
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197 private int r = -1; // cursor
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198
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199 /**
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200 * [minRev, maxRev]
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201 * @param minRev - inclusive
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202 * @param maxRev - inclusive
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203 */
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204 @SuppressWarnings("unchecked")
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205 public ManifestRevisionInspector(int minRev, int maxRev) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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206 baseRevision = minRev;
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207 int range = maxRev - minRev + 1;
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208 idsMap = new HashMap[range];
05829a70b30b Status operation extracted into separate, cache-friendly class
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209 flagsMap = new HashMap[range];
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210 }
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211
05829a70b30b Status operation extracted into separate, cache-friendly class
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212 public Collection<String> files(int rev) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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213 if (rev < baseRevision || rev >= baseRevision + idsMap.length) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
214 throw new IllegalArgumentException();
05829a70b30b Status operation extracted into separate, cache-friendly class
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215 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
216 return idsMap[rev - baseRevision].keySet();
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
217 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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218
05829a70b30b Status operation extracted into separate, cache-friendly class
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219 public Nodeid nodeid(int rev, String fname) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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220 if (rev < baseRevision || rev >= baseRevision + idsMap.length) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
221 throw new IllegalArgumentException();
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
222 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
223 return idsMap[rev - baseRevision].get(fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
224 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
225
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
226 public String flags(int rev, String fname) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
227 if (rev < baseRevision || rev >= baseRevision + idsMap.length) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
228 throw new IllegalArgumentException();
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
229 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
230 return flagsMap[rev - baseRevision].get(fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
231 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
232
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
233 //
05829a70b30b Status operation extracted into separate, cache-friendly class
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234
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
235 public boolean next(Nodeid nid, String fname, String flags) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
236 idsMap[r].put(fname, nid);
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
237 flagsMap[r].put(fname, flags);
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
238 return true;
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
239 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
240
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
241 public boolean end(int revision) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
242 assert revision == r + baseRevision;
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
243 r = -1;
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
244 return revision+1 < baseRevision + idsMap.length;
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
245 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
246
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
247 public boolean begin(int revision, Nodeid nid) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
248 if (revision < baseRevision || revision >= baseRevision + idsMap.length) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
249 throw new IllegalArgumentException();
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
250 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
251 r = revision - baseRevision;
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
252 idsMap[r] = new HashMap<String, Nodeid>();
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
253 flagsMap[r] = new HashMap<String, String>();
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
254 return true;
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
255 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
256 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
257
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
258 }