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annotate src/org/tmatesoft/hg/repo/HgRepoConfig.java @ 332:72c6eda838a6

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NPE in HgDirstate.known() when no dirstate file present
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 09 Nov 2011 04:33:44 +0100
parents a37ce7145c3f
children 467fd379b653
rev   line source
331
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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@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.internal.Experimental;
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27 import org.tmatesoft.hg.util.Pair;
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28
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29 /**
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30 * WORK IN PROGRESS
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31 *
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32 * Repository-specific configuration.
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33 *
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34 * @author Artem Tikhomirov
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35 * @author TMate Software Ltd.
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36 */
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37 @Experimental(reason="WORK IN PROGRESS")
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38 public final class HgRepoConfig /*implements RepoChangeListener, perhaps, also RepoChangeNotifier? */{
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39 /*ease access for inner classes*/ final ConfigFile config;
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40
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41 /*package-local*/HgRepoConfig(ConfigFile configFile) {
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42 config = configFile;
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43 }
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44
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45 public Section getSection(String name) {
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46 if (name == null) {
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47 throw new IllegalArgumentException();
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48 }
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49 if ("paths".equals(name)) {
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50 return new PathsSection();
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51 }
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52 if ("extensions".equals(name)) {
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53 return new ExtensionsSection();
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54 }
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55 return new Section(name);
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56 }
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57
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58 public boolean hasSection(String name) {
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59 return config.hasSection(name);
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60 }
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61
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62 public boolean getBooleanValue(String section, String key, boolean defaultValue) {
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63 return config.getBoolean(section, key, defaultValue);
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64 }
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65
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66 public String getStringValue(String section, String key, String defaultValue) {
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67 return config.getString(section, key, defaultValue);
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68 }
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69
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70 //
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71 //
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72
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73 public PathsSection getPaths() {
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74 Section s = getSection("paths");
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75 if (s.exists()) {
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76 return (PathsSection) s;
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77 }
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78 return new PathsSection();
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79 }
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80
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81 public ExtensionsSection getExtensions() {
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82 Section s = getSection("extensions");
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83 if (s.exists()) {
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84 return (ExtensionsSection) s;
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85 }
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86 return new ExtensionsSection();
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87 }
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88
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89 /*
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90 * IMPLEMENTATION NOTE: Section is merely a view to configuration file, without any state.
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91 * In case I need to sync access to config (i.e. write) or refresh it later - can be easily done
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92 */
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93
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94 public class Section implements Iterable<Pair<String,String>> {
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95
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96 protected final String section;
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97
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98 /*package-local*/Section(String sectionName) {
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99 section = sectionName;
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100 }
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101
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102 public String getName() {
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103 return section;
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104 }
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105
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106 /**
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107 * Whether this is real section or a bare non-null instance
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108 */
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109 public boolean exists() {
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110 return hasSection(section);
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111 }
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112
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113 /**
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114 * @return defined keys, in the order they appear in the section
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115 */
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116 public List<String> getKeys() {
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117 return new ArrayList<String>(config.getSection(section).keySet());
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118 }
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119
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120 /**
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121 * Find out whether key is present and got any value
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122 * @param key identifies an entry to look up
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123 * @return true if key is present in the section and has non-empty value
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124 */
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125 public boolean isKeySet(String key) {
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126 String value = getStringValue(section, key, null);
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127 return value != null && value.length() > 0;
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128 }
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129
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130 /**
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131 * Value of a key as boolean
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132 * @param key identifies an entry to look up
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133 * @param defaultValue optional value to return if no entry for the key found in this section
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134 * @return value corresponding to the key, or defaultValue if key not found
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135 */
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136 public boolean getBoolean(String key, boolean defaultValue) {
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137 return getBooleanValue(section, key, defaultValue);
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138 }
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139
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140 /**
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141 * Value of a key as regular string
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142 * @param key identifies entry to look up
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143 * @param defaultValue optional value to return if no entry for the key found in this section
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144 * @return value corresponding to the key, or defaultValue if key not found
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145 */
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146 public String getString(String key, String defaultValue) {
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147 return getStringValue(section, key, defaultValue);
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148 }
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149
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150 public Iterator<Pair<String, String>> iterator() {
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151 final Map<String, String> m = config.getSection(section);
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152 if (m.isEmpty()) {
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153 return Collections.<Pair<String,String>>emptyList().iterator();
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154 }
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155 ArrayList<Pair<String, String>> rv = new ArrayList<Pair<String,String>>(m.size());
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156 for (Map.Entry<String, String> e : m.entrySet()) {
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157 rv.add(new Pair<String,String>(e.getKey(), e.getValue()));
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158 }
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159 return rv.iterator();
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160 }
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161 }
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162
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163 /*
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164 * Few well-known sections may get their specific subclasses
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165 */
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166
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167 /**
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168 * Section [paths]
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169 */
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170 public class PathsSection extends Section {
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171 PathsSection() {
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172 super("paths");
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173 }
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174
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175 public boolean hasDefault() {
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176 return isKeySet("default");
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177 }
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178 public String getDefault() {
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179 return super.getString("default", null);
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180 }
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181 public boolean hasDefaultPush() {
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182 return isKeySet("default-push");
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183 }
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184 public String getDefaultPush() {
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185 return super.getString("default-push", null);
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186 }
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187 }
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188
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189 /**
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190 * Section [extensions]
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191 *
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192 * @author Artem Tikhomirov
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193 * @author TMate Software Ltd.
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194 */
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195 public class ExtensionsSection extends Section {
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196 ExtensionsSection() {
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197 super("extensions");
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198 }
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199
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200 public boolean isEnabled(String extensionName) {
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201 String value = config.getSection(section).get(extensionName);
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202 return value != null && value.length() > 0 && '!' != value.charAt(0) ;
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203 }
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204 }
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205 }