Mercurial > jhg

annotate src/org/tmatesoft/hg/repo/HgRepoConfig.java @ 338:3cfa4d908fc9

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Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close())
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 15 Nov 2011 04:47:03 +0100
parents 467fd379b653
children bba9f52cacf3
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 // PathsSection depends on return value being modifiable
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118 return new ArrayList<String>(config.getSection(section).keySet());
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119 }
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120
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121 /**
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122 * Find out whether key is present and got any value
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123 * @param key identifies an entry to look up
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124 * @return true if key is present in the section and has non-empty value
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125 */
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126 public boolean isKeySet(String key) {
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127 String value = getStringValue(section, key, null);
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128 return value != null && value.length() > 0;
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129 }
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130
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131 /**
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132 * Value of a key as boolean
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133 * @param key identifies an entry to look up
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134 * @param defaultValue optional value to return if no entry for the key found in this section
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135 * @return value corresponding to the key, or defaultValue if key not found
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136 */
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137 public boolean getBoolean(String key, boolean defaultValue) {
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138 return getBooleanValue(section, key, defaultValue);
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139 }
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140
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141 /**
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142 * Value of a key as regular string
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143 * @param key identifies entry to look up
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144 * @param defaultValue optional value to return if no entry for the key found in this section
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145 * @return value corresponding to the key, or defaultValue if key not found
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146 */
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147 public String getString(String key, String defaultValue) {
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148 return getStringValue(section, key, defaultValue);
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149 }
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150
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151 public Iterator<Pair<String, String>> iterator() {
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152 final Map<String, String> m = config.getSection(section);
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153 if (m.isEmpty()) {
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154 return Collections.<Pair<String,String>>emptyList().iterator();
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155 }
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156 ArrayList<Pair<String, String>> rv = new ArrayList<Pair<String,String>>(m.size());
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157 for (Map.Entry<String, String> e : m.entrySet()) {
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158 rv.add(new Pair<String,String>(e.getKey(), e.getValue()));
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159 }
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160 return rv.iterator();
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161 }
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162 }
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163
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164 /*
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165 * Few well-known sections may get their specific subclasses
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166 */
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167
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168 /**
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169 * Section [paths]
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170 */
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171 public class PathsSection extends Section {
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172 PathsSection() {
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173 super("paths");
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174 }
333
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175
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176 /**
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177 * Similar to {@link #getKeys()}, but without entries for <b>default</b> and <b>default-push</b> paths
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178 * @return list of path symbolic names
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179 */
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180 public List<String> getPathSymbolicNames() {
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181 final List<String> rv = getKeys();
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182 rv.remove("default");
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183 rv.remove("default-push");
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184 return rv;
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185 }
331
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186
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187 public boolean hasDefault() {
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188 return isKeySet("default");
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189 }
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190 public String getDefault() {
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191 return super.getString("default", null);
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192 }
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193 public boolean hasDefaultPush() {
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194 return isKeySet("default-push");
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195 }
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196 public String getDefaultPush() {
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197 return super.getString("default-push", null);
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198 }
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199 }
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200
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201 /**
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202 * Section [extensions]
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203 *
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204 * @author Artem Tikhomirov
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205 * @author TMate Software Ltd.
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206 */
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207 public class ExtensionsSection extends Section {
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208 ExtensionsSection() {
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209 super("extensions");
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210 }
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211
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212 public boolean isEnabled(String extensionName) {
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213 String value = config.getSection(section).get(extensionName);
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214 return value != null && value.length() > 0 && '!' != value.charAt(0) ;
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215 }
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216 }
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217 }