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annotate src/org/tmatesoft/hg/internal/ChangelogEntryBuilder.java @ 680:58a6900f845d

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Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sun, 21 Jul 2013 17:15:34 +0200
parents fba85bc1dfb8
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1 /*
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2 * Copyright (c) 2012-2013 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@hg4j.com
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16 */
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17 package org.tmatesoft.hg.internal;
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18
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19 import java.io.ByteArrayOutputStream;
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20 import java.util.ArrayList;
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21 import java.util.Collection;
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22 import java.util.Collections;
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23 import java.util.Iterator;
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24 import java.util.LinkedHashMap;
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25 import java.util.List;
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26 import java.util.Map;
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27 import java.util.Map.Entry;
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28 import java.util.TimeZone;
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29
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30 import org.tmatesoft.hg.core.HgIOException;
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31 import org.tmatesoft.hg.core.Nodeid;
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32 import org.tmatesoft.hg.internal.DataSerializer.DataSource;
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33 import org.tmatesoft.hg.util.Path;
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34
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35 /**
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36 * Builds changelog entry
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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 ChangelogEntryBuilder implements DataSource {
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41
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42 private final EncodingHelper encHelper;
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43 private String user;
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44 private List<Path> modifiedFiles;
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45 private final Map<String, String> extrasMap = new LinkedHashMap<String, String>();
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46 private Integer tzOffset;
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47 private Long csetTime;
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48 private Nodeid manifestRev;
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49 private CharSequence comment;
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50
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51 ChangelogEntryBuilder(EncodingHelper encodingHelper) {
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52 encHelper = encodingHelper;
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53 }
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54
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55 public ChangelogEntryBuilder user(String username) {
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56 user = username;
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57 return this;
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58 }
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59
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60 public String user() {
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61 if (user == null) {
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62 // for our testing purposes anything but null is ok. no reason to follow Hg username lookup conventions
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63 user = System.getProperty("user.name");
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64 }
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65 return user;
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66 }
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67
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68 public ChangelogEntryBuilder setModified(Collection<Path> files) {
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69 modifiedFiles = new ArrayList<Path>(files == null ? Collections.<Path>emptyList() : files);
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70 return this;
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71 }
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72
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73 public ChangelogEntryBuilder addModified(Collection<Path> files) {
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74 if (modifiedFiles == null) {
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75 return setModified(files);
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76 }
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77 modifiedFiles.addAll(files);
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78 return this;
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79 }
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80
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81 public ChangelogEntryBuilder branch(String branchName) {
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82 if (branchName == null || "default".equals(branchName)) {
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83 extrasMap.remove("branch");
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84 } else {
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85 extrasMap.put("branch", branchName);
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86 }
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87 return this;
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88 }
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90 public ChangelogEntryBuilder extras(Map<String, String> extras) {
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91 extrasMap.clear();
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92 extrasMap.putAll(extras);
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93 return this;
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94 }
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96 public ChangelogEntryBuilder date(long seconds, int timezoneOffset) {
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97 csetTime = seconds;
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98 tzOffset = timezoneOffset;
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99 return this;
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100 }
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101
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102 public ChangelogEntryBuilder manifest(Nodeid manifestRevision) {
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103 manifestRev = manifestRevision;
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104 return this;
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105 }
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106
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107 public ChangelogEntryBuilder comment(CharSequence commentString) {
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108 comment = commentString;
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109 return this;
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110 }
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111
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112 public void serialize(DataSerializer out) throws HgIOException {
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113 byte[] b = build();
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114 out.write(b, 0, b.length);
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115 }
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116
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117 public int serializeLength() {
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118 return -1;
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119 }
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120
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121 public byte[] build() {
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122 ByteArrayOutputStream out = new ByteArrayOutputStream();
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123 final int LF = '\n';
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124 CharSequence extras = buildExtras();
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125 CharSequence files = buildFiles();
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126 byte[] manifestRevision = manifestRev.toString().getBytes();
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127 byte[] username = encHelper.userToChangeset(user());
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128 out.write(manifestRevision, 0, manifestRevision.length);
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129 out.write(LF);
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130 out.write(username, 0, username.length);
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131 out.write(LF);
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132 final long csetDate = csetTime();
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133 byte[] date = String.format("%d %d", csetDate, csetTimezone(csetDate)).getBytes();
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134 out.write(date, 0, date.length);
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135 if (extras.length() > 0) {
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136 out.write(' ');
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137 byte[] b = extras.toString().getBytes();
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138 out.write(b, 0, b.length);
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139 }
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140 out.write(LF);
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141 byte[] b = encHelper.fileToChangeset(files);
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142 out.write(b, 0, b.length);
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143 out.write(LF);
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144 out.write(LF);
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145 byte[] cmt = encHelper.commentToChangeset(comment);
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146 out.write(cmt, 0, cmt.length);
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147 return out.toByteArray();
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148 }
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149
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150 private CharSequence buildExtras() {
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151 StringBuilder extras = new StringBuilder();
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152 for (Iterator<Entry<String, String>> it = extrasMap.entrySet().iterator(); it.hasNext();) {
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153 final Entry<String, String> next = it.next();
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154 extras.append(encodeExtrasPair(next.getKey()));
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155 extras.append(':');
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156 extras.append(encodeExtrasPair(next.getValue()));
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157 if (it.hasNext()) {
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158 extras.append('\00');
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159 }
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160 }
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161 return extras;
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162 }
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163
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164 private CharSequence buildFiles() {
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165 StringBuilder files = new StringBuilder();
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166 if (modifiedFiles != null) {
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167 Collections.sort(modifiedFiles);
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168 for (Iterator<Path> it = modifiedFiles.iterator(); it.hasNext(); ) {
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169 files.append(it.next());
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170 if (it.hasNext()) {
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171 files.append('\n');
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172 }
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173 }
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174 }
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175 return files;
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176 }
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177
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178 private final static CharSequence encodeExtrasPair(String s) {
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179 if (s != null) {
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180 return s.replace("\\", "\\\\").replace("\n", "\\n").replace("\r", "\\r").replace("\00", "\\0");
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181 }
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182 return s;
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183 }
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184
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185 private long csetTime() {
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186 if (csetTime != null) {
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187 return csetTime;
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188 }
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189 return System.currentTimeMillis() / 1000;
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190 }
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191
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192 private int csetTimezone(long time) {
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193 if (tzOffset != null) {
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194 return tzOffset;
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195 }
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196 return -(TimeZone.getDefault().getOffset(time) / 1000);
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197 }
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198 }