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annotate src/org/tmatesoft/hg/repo/StatusCollector.java @ 84:08754fce5778

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updated design questions
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 25 Jan 2011 22:53:28 +0100
parents 6f1b88693d48
children 61eedab3eb3e
rev   line source
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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.repo;
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18
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19 import static org.tmatesoft.hg.repo.HgRepository.BAD_REVISION;
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20 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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21
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22 import java.util.Collection;
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23 import java.util.Collections;
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24 import java.util.HashMap;
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25 import java.util.LinkedHashMap;
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26 import java.util.LinkedList;
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27 import java.util.List;
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28 import java.util.Map;
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29 import java.util.TreeSet;
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31 import org.tmatesoft.hg.core.Nodeid;
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33
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34 /**
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35 * RevisionWalker?
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36 *
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37 * @author Artem Tikhomirov
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38 * @author TMate Software Ltd.
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39 */
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40 public class StatusCollector {
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41
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42 private final HgRepository repo;
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43 private final Map<Integer, ManifestRevisionInspector> cache; // sparse array, in fact
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45 public StatusCollector(HgRepository hgRepo) {
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46 this.repo = hgRepo;
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47 cache = new HashMap<Integer, ManifestRevisionInspector>();
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48 ManifestRevisionInspector emptyFakeState = new ManifestRevisionInspector(-1, -1);
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49 emptyFakeState.begin(-1, null);
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50 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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51 cache.put(-1, emptyFakeState);
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52 }
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54 public HgRepository getRepo() {
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55 return repo;
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56 }
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57
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58 private ManifestRevisionInspector get(int rev) {
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59 ManifestRevisionInspector i = cache.get(rev);
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60 if (i == null) {
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61 i = new ManifestRevisionInspector(rev, rev);
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62 cache.put(rev, i);
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63 repo.getManifest().walk(rev, rev, i);
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64 }
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65 return i;
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66 }
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68 /*package-local*/ ManifestRevisionInspector raw(int rev) {
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69 return get(rev);
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70 }
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72 // hg status --change <rev>
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73 public void change(int rev, Inspector inspector) {
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74 int[] parents = new int[2];
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75 repo.getChangelog().parents(rev, parents, null, null);
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76 walk(parents[0], rev, inspector);
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77 }
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78
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79 // I assume revision numbers are the same for changelog and manifest - here
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80 // user would like to pass changelog revision numbers, and I use them directly to walk manifest.
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81 // if this assumption is wrong, fix this (lookup manifest revisions from changeset).
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82 public void walk(int rev1, int rev2, Inspector inspector) {
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83 if (rev1 == rev2) {
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84 throw new IllegalArgumentException();
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85 }
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86 if (inspector == null) {
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87 throw new IllegalArgumentException();
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88 }
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89 if (inspector instanceof Record) {
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90 ((Record) inspector).init(rev1, rev2, this);
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91 }
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92 if (rev1 == TIP) {
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93 rev1 = repo.getManifest().getRevisionCount() - 1;
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94 }
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95 if (rev2 == TIP) {
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96 rev2 = repo.getManifest().getRevisionCount() - 1; // XXX add Revlog.tip() func ?
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97 }
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98 // in fact, rev1 and rev2 are often next (or close) to each other,
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99 // thus, we can optimize Manifest reads here (manifest.walk(rev1, rev2))
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100 ManifestRevisionInspector r1, r2;
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101 if (!cache.containsKey(rev1) && !cache.containsKey(rev2) && Math.abs(rev1 - rev2) < 5 /*subjective equivalent of 'close enough'*/) {
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102 int minRev = rev1 < rev2 ? rev1 : rev2;
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103 int maxRev = minRev == rev1 ? rev2 : rev1;
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104 r1 = r2 = new ManifestRevisionInspector(minRev, maxRev);
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105 for (int i = minRev; i <= maxRev; i++) {
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106 cache.put(i, r1);
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107 }
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108 repo.getManifest().walk(minRev, maxRev, r1);
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109 } else {
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110 r1 = get(rev1);
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111 r2 = get(rev2);
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112 }
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113
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114 TreeSet<String> r1Files = new TreeSet<String>(r1.files(rev1));
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115 for (String fname : r2.files(rev2)) {
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116 if (r1Files.remove(fname)) {
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117 Nodeid nidR1 = r1.nodeid(rev1, fname);
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118 Nodeid nidR2 = r2.nodeid(rev2, fname);
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119 String flagsR1 = r1.flags(rev1, fname);
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120 String flagsR2 = r2.flags(rev2, fname);
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121 if (nidR1.equals(nidR2) && ((flagsR2 == null && flagsR1 == null) || flagsR2.equals(flagsR1))) {
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122 inspector.clean(fname);
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123 } else {
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124 inspector.modified(fname);
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125 }
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126 } else {
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127 inspector.added(fname);
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128 }
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129 }
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130 for (String left : r1Files) {
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131 inspector.removed(left);
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132 }
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133 // inspector.done() if useful e.g. in UI client
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134 }
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135
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136 public Record status(int rev1, int rev2) {
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137 Record rv = new Record();
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138 walk(rev1, rev2, rv);
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139 return rv;
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140 }
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141
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142 public interface Inspector {
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143 void modified(String fname);
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144 void added(String fname);
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145 // XXX need to specify whether StatusCollector invokes added() along with copied or not!
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146 void copied(String fnameOrigin, String fnameAdded); // if copied files of no interest, should delegate to self.added(fnameAdded);
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147 void removed(String fname);
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148 void clean(String fname);
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149 void missing(String fname); // aka deleted (tracked by Hg, but not available in FS any more
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150 void unknown(String fname); // not tracked
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151 void ignored(String fname);
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152 }
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153
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154 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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155 // XXX Need to specify whether copy targets are in added or not (@see Inspector#copied above)
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156 public static class Record implements Inspector {
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157 private List<String> modified, added, removed, clean, missing, unknown, ignored;
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158 private Map<String, String> copied;
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159
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160 private int startRev, endRev;
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161 private StatusCollector statusHelper;
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162
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163 // XXX StatusCollector may additionally initialize Record instance to speed lookup of changed file revisions
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164 // here I need access to ManifestRevisionInspector via #raw(). Perhaps, non-static class (to get
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165 // implicit reference to StatusCollector) may be better?
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166 // Since users may want to reuse Record instance we've once created (and initialized), we need to
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167 // ensure functionality is correct for each/any call (#walk checks instanceof Record and fixes it up)
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168 // Perhaps, distinct helper (sc.getRevisionHelper().nodeid(fname)) would be better, just not clear
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169 // how to supply [start..end] values there easily
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170 /*package-local*/void init(int startRevision, int endRevision, StatusCollector self) {
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171 startRev = startRevision;
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172 endRev = endRevision;
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173 statusHelper = self;
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174 }
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175
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176 public Nodeid nodeidBeforeChange(String fname) {
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177 if (statusHelper == null || startRev == BAD_REVISION) {
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178 return null;
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179 }
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180 if ((modified == null || !modified.contains(fname)) && (removed == null || !removed.contains(fname))) {
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181 return null;
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182 }
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183 return statusHelper.raw(startRev).nodeid(startRev, fname);
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184 }
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185 public Nodeid nodeidAfterChange(String fname) {
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186 if (statusHelper == null || endRev == BAD_REVISION) {
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187 return null;
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188 }
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189 if ((modified == null || !modified.contains(fname)) && (added == null || !added.contains(fname))) {
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190 return null;
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191 }
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192 return statusHelper.raw(endRev).nodeid(endRev, fname);
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193 }
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194
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195 public List<String> getModified() {
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196 return proper(modified);
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197 }
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198
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199 public List<String> getAdded() {
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200 return proper(added);
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201 }
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202
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203 public List<String> getRemoved() {
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204 return proper(removed);
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205 }
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206
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207 public Map<String,String> getCopied() {
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208 if (copied == null) {
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209 return Collections.emptyMap();
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210 }
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211 return Collections.unmodifiableMap(copied);
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212 }
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213
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214 public List<String> getClean() {
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215 return proper(clean);
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216 }
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217
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218 public List<String> getMissing() {
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219 return proper(missing);
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220 }
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221
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222 public List<String> getUnknown() {
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223 return proper(unknown);
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224 }
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225
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226 public List<String> getIgnored() {
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227 return proper(ignored);
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228 }
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229
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230 private List<String> proper(List<String> l) {
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231 if (l == null) {
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232 return Collections.emptyList();
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233 }
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234 return Collections.unmodifiableList(l);
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235 }
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236
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237 //
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238 //
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239
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240 public void modified(String fname) {
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241 modified = doAdd(modified, fname);
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242 }
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243
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244 public void added(String fname) {
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245 added = doAdd(added, fname);
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246 }
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247
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248 public void copied(String fnameOrigin, String fnameAdded) {
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249 if (copied == null) {
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250 copied = new LinkedHashMap<String, String>();
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251 }
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252 added(fnameAdded);
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253 copied.put(fnameAdded, fnameOrigin);
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254 }
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255
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256 public void removed(String fname) {
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257 removed = doAdd(removed, fname);
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258 }
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259
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260 public void clean(String fname) {
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261 clean = doAdd(clean, fname);
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262 }
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263
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264 public void missing(String fname) {
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265 missing = doAdd(missing, fname);
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266 }
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267
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268 public void unknown(String fname) {
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269 unknown = doAdd(unknown, fname);
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270 }
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271
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272 public void ignored(String fname) {
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273 ignored = doAdd(ignored, fname);
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274 }
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275
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276 private static List<String> doAdd(List<String> l, String s) {
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277 if (l == null) {
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278 l = new LinkedList<String>();
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279 }
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280 l.add(s);
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281 return l;
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282 }
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283 }
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284
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19e9e220bf68 Convenient commands constitute hi-level API. org.tmatesoft namespace, GPL2 statement
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285 // 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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286 public /*XXX private, actually. Made public unless repo.statusLocal finds better place*/ static final class ManifestRevisionInspector implements HgManifest.Inspector {
05829a70b30b Status operation extracted into separate, cache-friendly class
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287 private final HashMap<String, Nodeid>[] idsMap;
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288 private final HashMap<String, String>[] flagsMap;
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289 private final int baseRevision;
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290 private int r = -1; // cursor
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291
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292 /**
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293 * [minRev, maxRev]
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576d6e8a09f6 Analog of 'hg status --change' command
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294 * [-1,-1] also accepted (for fake empty instance)
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295 * @param minRev - inclusive
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296 * @param maxRev - inclusive
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297 */
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298 @SuppressWarnings("unchecked")
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299 public ManifestRevisionInspector(int minRev, int maxRev) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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300 baseRevision = minRev;
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301 int range = maxRev - minRev + 1;
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302 idsMap = new HashMap[range];
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303 flagsMap = new HashMap[range];
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304 }
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305
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306 public Collection<String> files(int rev) {
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307 if (rev < baseRevision || rev >= baseRevision + idsMap.length) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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308 throw new IllegalArgumentException();
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309 }
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310 return idsMap[rev - baseRevision].keySet();
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311 }
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312
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313 public Nodeid nodeid(int rev, String fname) {
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314 if (rev < baseRevision || rev >= baseRevision + idsMap.length) {
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315 throw new IllegalArgumentException();
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316 }
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317 return idsMap[rev - baseRevision].get(fname);
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318 }
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319
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320 public String flags(int rev, String fname) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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321 if (rev < baseRevision || rev >= baseRevision + idsMap.length) {
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322 throw new IllegalArgumentException();
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323 }
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324 return flagsMap[rev - baseRevision].get(fname);
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325 }
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326
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327 //
05829a70b30b Status operation extracted into separate, cache-friendly class
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328
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329 public boolean next(Nodeid nid, String fname, String flags) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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330 idsMap[r].put(fname, nid);
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331 flagsMap[r].put(fname, flags);
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332 return true;
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333 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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334
05829a70b30b Status operation extracted into separate, cache-friendly class
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335 public boolean end(int revision) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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336 assert revision == r + baseRevision;
05829a70b30b Status operation extracted into separate, cache-friendly class
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337 r = -1;
05829a70b30b Status operation extracted into separate, cache-friendly class
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338 return revision+1 < baseRevision + idsMap.length;
05829a70b30b Status operation extracted into separate, cache-friendly class
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339 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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340
05829a70b30b Status operation extracted into separate, cache-friendly class
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341 public boolean begin(int revision, Nodeid nid) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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342 if (revision < baseRevision || revision >= baseRevision + idsMap.length) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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343 throw new IllegalArgumentException();
05829a70b30b Status operation extracted into separate, cache-friendly class
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344 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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345 r = revision - baseRevision;
05829a70b30b Status operation extracted into separate, cache-friendly class
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346 idsMap[r] = new HashMap<String, Nodeid>();
05829a70b30b Status operation extracted into separate, cache-friendly class
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347 flagsMap[r] = new HashMap<String, String>();
05829a70b30b Status operation extracted into separate, cache-friendly class
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348 return true;
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349 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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350 }
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351
05829a70b30b Status operation extracted into separate, cache-friendly class
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352 }