Mercurial > hg4j

annotate src/org/tmatesoft/hg/repo/HgRepoConfig.java @ 579:36e36b926747

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Provide means to read user-specific configuration, with no specific repository selected
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 17 Apr 2013 16:06:10 +0200
parents db48a77ec8ff
children
rev   line source
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1 /*
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2 * Copyright (c) 2011-2013 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.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 configuration.
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30 *
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31 * @see http://www.selenic.com/mercurial/hgrc.5.html
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32 * @author Artem Tikhomirov
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33 * @author TMate Software Ltd.
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34 */
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35 public final class HgRepoConfig /*implements RepoChangeListener, perhaps, also RepoChangeNotifier? */{
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36 // TODO [1.2+] The name HgRepoConfig is unfortunate, we could've used this class not only for
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37 // repository configuration but system-wide/global configuration, or user configuration (without repo), too.
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38 // Perhaps, rename and deprecate?
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39
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40 /*ease access for inner classes*/ final ConfigFile config;
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41
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42 /*package-local*/HgRepoConfig(ConfigFile configFile) {
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43 config = configFile;
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44 }
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45
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46 public Section getSection(String name) {
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47 if (name == null) {
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48 throw new IllegalArgumentException();
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49 }
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50 if ("paths".equals(name)) {
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51 return new PathsSection();
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52 }
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53 if ("extensions".equals(name)) {
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54 return new ExtensionsSection();
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55 }
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56 return new Section(name);
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57 }
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58
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59 public boolean hasSection(String name) {
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60 return config.hasSection(name);
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61 }
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62
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63 public boolean getBooleanValue(String section, String key, boolean defaultValue) {
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64 return config.getBoolean(section, key, defaultValue);
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65 }
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66
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67 public String getStringValue(String section, String key, String defaultValue) {
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68 return config.getString(section, key, defaultValue);
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69 }
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70
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71 public int getIntegerValue(String section, String key, int defaultValue) {
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72 return config.getInteger(section, key, defaultValue);
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73 }
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74
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75 //
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76 //
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77
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78 public PathsSection getPaths() {
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79 Section s = getSection("paths");
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80 if (s.exists()) {
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81 return (PathsSection) s;
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82 }
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83 return new PathsSection();
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84 }
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85
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86 public ExtensionsSection getExtensions() {
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87 Section s = getSection("extensions");
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88 if (s.exists()) {
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89 return (ExtensionsSection) s;
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90 }
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91 return new ExtensionsSection();
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92 }
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93
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94 /*
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95 * IMPLEMENTATION NOTE: Section is merely a view to configuration file, without any state.
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96 * In case I need to sync access to config (i.e. write) or refresh it later - can be easily done
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97 */
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98
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99 public class Section implements Iterable<Pair<String,String>> {
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100
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101 protected final String section;
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102
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103 /*package-local*/Section(String sectionName) {
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104 section = sectionName;
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105 }
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106
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107 public String getName() {
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108 return section;
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109 }
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110
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111 /**
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112 * Whether this is real section or a bare non-null instance
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113 */
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114 public boolean exists() {
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115 return hasSection(section);
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116 }
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117
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118 /**
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119 * @return defined keys, in the order they appear in the section
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120 */
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121 public List<String> getKeys() {
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122 // PathsSection depends on return value being modifiable
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123 return new ArrayList<String>(config.getSection(section).keySet());
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124 }
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125
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126 /**
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127 * Find out whether key is present and got any value
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128 * @param key identifies an entry to look up
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129 * @return true if key is present in the section and has non-empty value
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130 */
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131 public boolean isKeySet(String key) {
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132 String value = getStringValue(section, key, null);
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133 return value != null && value.length() > 0;
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134 }
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135
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136 /**
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137 * Value of a key as boolean
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138 * @param key identifies an entry to look up
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139 * @param defaultValue optional value to return if no entry for the key found in this section
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140 * @return value corresponding to the key, or defaultValue if key not found
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141 */
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142 public boolean getBoolean(String key, boolean defaultValue) {
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143 return getBooleanValue(section, key, defaultValue);
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144 }
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145
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146 /**
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147 * Value of a key as regular string
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148 * @param key identifies entry to look up
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149 * @param defaultValue optional value to return if no entry for the key found in this section
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150 * @return value corresponding to the key, or defaultValue if key not found
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151 */
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152 public String getString(String key, String defaultValue) {
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153 return getStringValue(section, key, defaultValue);
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154 }
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155
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156 public Iterator<Pair<String, String>> iterator() {
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157 final Map<String, String> m = config.getSection(section);
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158 if (m.isEmpty()) {
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159 return Collections.<Pair<String,String>>emptyList().iterator();
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160 }
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161 ArrayList<Pair<String, String>> rv = new ArrayList<Pair<String,String>>(m.size());
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162 for (Map.Entry<String, String> e : m.entrySet()) {
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163 rv.add(new Pair<String,String>(e.getKey(), e.getValue()));
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164 }
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165 return rv.iterator();
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166 }
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167 }
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168
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169 /*
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170 * Few well-known sections may get their specific subclasses
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171 */
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172
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173 /**
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174 * Section [paths]
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175 */
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176 public class PathsSection extends Section {
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177 PathsSection() {
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178 super("paths");
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179 }
333
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180
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181 /**
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182 * Similar to {@link #getKeys()}, but without entries for <b>default</b> and <b>default-push</b> paths
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183 * @return list of path symbolic names
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184 */
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185 public List<String> getPathSymbolicNames() {
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186 final List<String> rv = getKeys();
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187 rv.remove("default");
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188 rv.remove("default-push");
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189 return rv;
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190 }
331
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191
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192 public boolean hasDefault() {
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193 return isKeySet("default");
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194 }
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195 public String getDefault() {
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196 return super.getString("default", null);
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197 }
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198 public boolean hasDefaultPush() {
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199 return isKeySet("default-push");
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200 }
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201 public String getDefaultPush() {
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202 return super.getString("default-push", null);
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203 }
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204 }
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205
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206 /**
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207 * Section [extensions]
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208 *
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209 * @author Artem Tikhomirov
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210 * @author TMate Software Ltd.
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211 */
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212 public class ExtensionsSection extends Section {
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213 ExtensionsSection() {
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214 super("extensions");
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215 }
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216
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217 public boolean isEnabled(String extensionName) {
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218 final Map<String, String> sect = config.getSection(section);
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219 String value = sect.get(extensionName);
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220 if (value == null) {
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221 value = sect.get("hgext." + extensionName);
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222 }
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223 if (value == null) {
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224 value = sect.get("hgext/" + extensionName);
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225 }
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226 if (value != null) {
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227 // empty line, just "extension =" is valid way to enable it
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228 return value.length() == 0 || '!' != value.charAt(0);
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229 }
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230 return false;
331
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231 }
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232 }
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233 }