Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/ChangelogEntryBuilder.java @ 655:bcbcc318f250

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Performance: reuse unzip output buffer
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 04 Jul 2013 18:36:38 +0200
parents 4e6179bde4fc
children fba85bc1dfb8
rev   line source
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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.io.UnsupportedEncodingException;
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21 import java.util.ArrayList;
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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.Iterator;
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25 import java.util.LinkedHashMap;
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26 import java.util.List;
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27 import java.util.Map;
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28 import java.util.Map.Entry;
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29 import java.util.TimeZone;
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30
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31 import org.tmatesoft.hg.core.HgIOException;
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32 import org.tmatesoft.hg.core.Nodeid;
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33 import org.tmatesoft.hg.internal.DataSerializer.DataSource;
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34 import org.tmatesoft.hg.repo.HgInvalidStateException;
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35 import org.tmatesoft.hg.util.Path;
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36
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37 /**
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38 * Builds changelog entry
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39 * @author Artem Tikhomirov
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40 * @author TMate Software Ltd.
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41 */
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42 public class ChangelogEntryBuilder implements DataSource {
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43
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44 private String user;
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45 private List<Path> modifiedFiles;
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46 private final Map<String, String> extrasMap = new LinkedHashMap<String, String>();
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47 private Integer tzOffset;
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48 private Long csetTime;
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49 private Nodeid manifestRev;
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50 private CharSequence comment;
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51
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52 public ChangelogEntryBuilder user(String username) {
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53 user = username;
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54 return this;
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55 }
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56
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57 public String user() {
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58 if (user == null) {
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59 // for our testing purposes anything but null is ok. no reason to follow Hg username lookup conventions
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60 user = System.getProperty("user.name");
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61 }
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62 return user;
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63 }
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64
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65 public ChangelogEntryBuilder setModified(Collection<Path> files) {
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66 modifiedFiles = new ArrayList<Path>(files == null ? Collections.<Path>emptyList() : files);
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67 return this;
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68 }
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69
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70 public ChangelogEntryBuilder addModified(Collection<Path> files) {
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71 if (modifiedFiles == null) {
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72 return setModified(files);
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73 }
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74 modifiedFiles.addAll(files);
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75 return this;
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76 }
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77
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78 public ChangelogEntryBuilder branch(String branchName) {
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79 if (branchName == null || "default".equals(branchName)) {
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80 extrasMap.remove("branch");
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81 } else {
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82 extrasMap.put("branch", branchName);
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83 }
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84 return this;
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85 }
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86
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87 public ChangelogEntryBuilder extras(Map<String, String> extras) {
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88 extrasMap.clear();
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89 extrasMap.putAll(extras);
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90 return this;
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91 }
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92
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93 public ChangelogEntryBuilder date(long seconds, int timezoneOffset) {
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94 csetTime = seconds;
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95 tzOffset = timezoneOffset;
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96 return this;
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97 }
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98
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99 public ChangelogEntryBuilder manifest(Nodeid manifestRevision) {
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100 manifestRev = manifestRevision;
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101 return this;
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102 }
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103
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104 public ChangelogEntryBuilder comment(CharSequence commentString) {
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105 comment = commentString;
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106 return this;
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107 }
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108
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109 public void serialize(DataSerializer out) throws HgIOException {
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110 byte[] b = build();
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111 out.write(b, 0, b.length);
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112 }
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113
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114 public int serializeLength() {
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115 return -1;
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116 }
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117
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118 public byte[] build() {
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119 try {
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120 ByteArrayOutputStream out = new ByteArrayOutputStream();
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121 final int LF = '\n';
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122 CharSequence extras = buildExtras();
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123 CharSequence files = buildFiles();
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124 byte[] manifestRevision = manifestRev.toString().getBytes();
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125 byte[] username = user().getBytes(EncodingHelper.getUTF8().name()); // XXX Java 1.5
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126 out.write(manifestRevision, 0, manifestRevision.length);
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127 out.write(LF);
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128 out.write(username, 0, username.length);
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129 out.write(LF);
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130 final long csetDate = csetTime();
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131 byte[] date = String.format("%d %d", csetDate, csetTimezone(csetDate)).getBytes();
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132 out.write(date, 0, date.length);
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133 if (extras.length() > 0) {
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134 out.write(' ');
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135 byte[] b = extras.toString().getBytes();
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136 out.write(b, 0, b.length);
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137 }
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138 out.write(LF);
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139 byte[] b = files.toString().getBytes();
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140 out.write(b, 0, b.length);
622
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141 out.write(LF);
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142 out.write(LF);
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143 byte[] cmt = comment.toString().getBytes(EncodingHelper.getUTF8().name()); // XXX Java 1.5
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144 out.write(cmt, 0, cmt.length);
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145 return out.toByteArray();
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146 } catch (UnsupportedEncodingException ex) {
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147 throw new HgInvalidStateException(ex.getMessage()); // Can't happen, UTF8 is always there
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148 }
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149 }
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150
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151 private CharSequence buildExtras() {
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152 StringBuilder extras = new StringBuilder();
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153 for (Iterator<Entry<String, String>> it = extrasMap.entrySet().iterator(); it.hasNext();) {
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154 final Entry<String, String> next = it.next();
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155 extras.append(encodeExtrasPair(next.getKey()));
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156 extras.append(':');
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157 extras.append(encodeExtrasPair(next.getValue()));
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158 if (it.hasNext()) {
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159 extras.append('\00');
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160 }
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161 }
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162 return extras;
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163 }
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164
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165 private CharSequence buildFiles() {
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166 StringBuilder files = new StringBuilder();
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167 if (modifiedFiles != null) {
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168 Collections.sort(modifiedFiles);
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169 for (Iterator<Path> it = modifiedFiles.iterator(); it.hasNext(); ) {
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170 files.append(it.next());
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171 if (it.hasNext()) {
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172 files.append('\n');
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173 }
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174 }
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175 }
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176 return files;
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177 }
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178
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179 private final static CharSequence encodeExtrasPair(String s) {
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180 if (s != null) {
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181 return s.replace("\\", "\\\\").replace("\n", "\\n").replace("\r", "\\r").replace("\00", "\\0");
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182 }
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183 return s;
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184 }
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185
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186 private long csetTime() {
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187 if (csetTime != null) {
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188 return csetTime;
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189 }
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190 return System.currentTimeMillis() / 1000;
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191 }
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192
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193 private int csetTimezone(long time) {
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194 if (tzOffset != null) {
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195 return tzOffset;
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196 }
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197 return -(TimeZone.getDefault().getOffset(time) / 1000);
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198 }
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199 }