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annotate src/org/tmatesoft/hg/repo/HgRepoConfig.java @ 480:f3fab7a20841

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Refactor LineReader utility as stanalone class to facilitate reuse
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 17 Jul 2012 22:14:21 +0200
parents 51d682cf9cdc
children db48a77ec8ff
rev   line source
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1 /*
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2 * Copyright (c) 2011-2012 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.repo;
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18
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19 import java.util.ArrayList;
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20 import java.util.Collections;
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21 import java.util.Iterator;
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22 import java.util.List;
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23 import java.util.Map;
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24
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25 import org.tmatesoft.hg.internal.ConfigFile;
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26 import org.tmatesoft.hg.util.Pair;
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27
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28 /**
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29 * Repository-specific configuration.
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30 *
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31 * @author Artem Tikhomirov
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32 * @author TMate Software Ltd.
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33 */
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34 public final class HgRepoConfig /*implements RepoChangeListener, perhaps, also RepoChangeNotifier? */{
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35 /*ease access for inner classes*/ final ConfigFile config;
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36
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37 /*package-local*/HgRepoConfig(ConfigFile configFile) {
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38 config = configFile;
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39 }
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40
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41 public Section getSection(String name) {
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42 if (name == null) {
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43 throw new IllegalArgumentException();
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44 }
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45 if ("paths".equals(name)) {
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46 return new PathsSection();
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47 }
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48 if ("extensions".equals(name)) {
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49 return new ExtensionsSection();
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50 }
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51 return new Section(name);
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52 }
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53
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54 public boolean hasSection(String name) {
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55 return config.hasSection(name);
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56 }
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57
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58 public boolean getBooleanValue(String section, String key, boolean defaultValue) {
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59 return config.getBoolean(section, key, defaultValue);
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60 }
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61
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62 public String getStringValue(String section, String key, String defaultValue) {
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63 return config.getString(section, key, defaultValue);
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64 }
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65
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66 //
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67 //
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68
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69 public PathsSection getPaths() {
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70 Section s = getSection("paths");
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71 if (s.exists()) {
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72 return (PathsSection) s;
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73 }
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74 return new PathsSection();
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75 }
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76
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77 public ExtensionsSection getExtensions() {
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78 Section s = getSection("extensions");
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79 if (s.exists()) {
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80 return (ExtensionsSection) s;
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81 }
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82 return new ExtensionsSection();
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83 }
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84
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85 /*
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86 * IMPLEMENTATION NOTE: Section is merely a view to configuration file, without any state.
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87 * In case I need to sync access to config (i.e. write) or refresh it later - can be easily done
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88 */
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89
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90 public class Section implements Iterable<Pair<String,String>> {
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91
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92 protected final String section;
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93
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94 /*package-local*/Section(String sectionName) {
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95 section = sectionName;
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96 }
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97
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98 public String getName() {
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99 return section;
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100 }
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101
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102 /**
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103 * Whether this is real section or a bare non-null instance
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104 */
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105 public boolean exists() {
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106 return hasSection(section);
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107 }
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108
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109 /**
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110 * @return defined keys, in the order they appear in the section
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111 */
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112 public List<String> getKeys() {
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113 // PathsSection depends on return value being modifiable
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114 return new ArrayList<String>(config.getSection(section).keySet());
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115 }
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116
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117 /**
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118 * Find out whether key is present and got any value
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119 * @param key identifies an entry to look up
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120 * @return true if key is present in the section and has non-empty value
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121 */
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122 public boolean isKeySet(String key) {
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123 String value = getStringValue(section, key, null);
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124 return value != null && value.length() > 0;
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125 }
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126
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127 /**
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128 * Value of a key as boolean
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129 * @param key identifies an entry to look up
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130 * @param defaultValue optional value to return if no entry for the key found in this section
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131 * @return value corresponding to the key, or defaultValue if key not found
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132 */
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133 public boolean getBoolean(String key, boolean defaultValue) {
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134 return getBooleanValue(section, key, defaultValue);
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135 }
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136
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137 /**
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138 * Value of a key as regular string
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139 * @param key identifies entry to look up
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140 * @param defaultValue optional value to return if no entry for the key found in this section
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141 * @return value corresponding to the key, or defaultValue if key not found
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142 */
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143 public String getString(String key, String defaultValue) {
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144 return getStringValue(section, key, defaultValue);
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145 }
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146
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147 public Iterator<Pair<String, String>> iterator() {
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148 final Map<String, String> m = config.getSection(section);
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149 if (m.isEmpty()) {
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150 return Collections.<Pair<String,String>>emptyList().iterator();
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151 }
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152 ArrayList<Pair<String, String>> rv = new ArrayList<Pair<String,String>>(m.size());
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153 for (Map.Entry<String, String> e : m.entrySet()) {
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154 rv.add(new Pair<String,String>(e.getKey(), e.getValue()));
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155 }
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156 return rv.iterator();
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157 }
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158 }
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159
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160 /*
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161 * Few well-known sections may get their specific subclasses
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162 */
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163
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164 /**
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165 * Section [paths]
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166 */
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167 public class PathsSection extends Section {
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168 PathsSection() {
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169 super("paths");
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170 }
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171
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172 /**
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173 * Similar to {@link #getKeys()}, but without entries for <b>default</b> and <b>default-push</b> paths
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174 * @return list of path symbolic names
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175 */
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176 public List<String> getPathSymbolicNames() {
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177 final List<String> rv = getKeys();
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178 rv.remove("default");
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179 rv.remove("default-push");
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180 return rv;
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181 }
331
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182
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183 public boolean hasDefault() {
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184 return isKeySet("default");
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185 }
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186 public String getDefault() {
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187 return super.getString("default", null);
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188 }
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189 public boolean hasDefaultPush() {
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190 return isKeySet("default-push");
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191 }
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192 public String getDefaultPush() {
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193 return super.getString("default-push", null);
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194 }
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195 }
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196
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197 /**
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198 * Section [extensions]
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199 *
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200 * @author Artem Tikhomirov
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201 * @author TMate Software Ltd.
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202 */
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203 public class ExtensionsSection extends Section {
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204 ExtensionsSection() {
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205 super("extensions");
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206 }
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207
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208 public boolean isEnabled(String extensionName) {
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209 final Map<String, String> sect = config.getSection(section);
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210 String value = sect.get(extensionName);
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211 if (value == null) {
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212 value = sect.get("hgext." + extensionName);
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213 }
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214 if (value == null) {
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215 value = sect.get("hgext/" + extensionName);
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216 }
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217 if (value != null) {
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218 // empty line, just "extension =" is valid way to enable it
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219 return value.length() == 0 || '!' != value.charAt(0);
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220 }
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221 return false;
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222 }
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223 }
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224 }