Mercurial > jhg
annotate src/org/tmatesoft/hg/internal/ConfigFile.java @ 254:a620f0663a37
Collect tags for a file - improve performance of 'sparse' manifest reads
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Tue, 16 Aug 2011 04:03:29 +0200 |
parents | 947bf231acbb |
children | 981f9f50bb6c |
rev | line source |
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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 |
102
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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.BufferedReader; |
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20 import java.io.File; |
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21 import java.io.FileReader; |
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22 import java.io.IOException; |
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23 import java.util.ArrayList; |
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24 import java.util.Collections; |
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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 |
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29 /** |
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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 class ConfigFile { |
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35 |
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36 private List<String> sections; |
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37 private List<Map<String,String>> content; |
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38 |
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39 ConfigFile() { |
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40 } |
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41 |
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42 public void addLocation(File path) { |
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43 read(path); |
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44 } |
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45 |
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46 public boolean hasSection(String sectionName) { |
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47 return sections == null ? false : sections.indexOf(sectionName) == -1; |
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48 } |
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49 |
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50 // XXX perhaps, should be moved to subclass HgRepoConfig, as it is not common operation for any config file |
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51 public boolean hasEnabledExtension(String extensionName) { |
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52 int x = sections != null ? sections.indexOf("extensions") : -1; |
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53 if (x == -1) { |
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54 return false; |
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55 } |
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56 String value = content.get(x).get(extensionName); |
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57 return value != null && !"!".equals(value); |
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58 } |
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59 |
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60 public List<String> getSectionNames() { |
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61 return sections == null ? Collections.<String>emptyList() : Collections.unmodifiableList(sections); |
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62 } |
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63 |
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64 public Map<String,String> getSection(String sectionName) { |
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65 if (sections == null) { |
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66 return Collections.emptyMap(); |
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67 } |
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68 int x = sections.indexOf(sectionName); |
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69 if (x == -1) { |
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70 return Collections.emptyMap(); |
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71 } |
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72 return Collections.unmodifiableMap(content.get(x)); |
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73 } |
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74 |
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75 public boolean getBoolean(String sectionName, String key, boolean defaultValue) { |
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76 String value = getSection(sectionName).get(key); |
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77 if (value == null) { |
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78 return defaultValue; |
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79 } |
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80 for (String s : new String[] { "true", "yes", "on", "1" }) { |
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81 if (s.equalsIgnoreCase(value)) { |
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82 return true; |
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83 } |
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84 } |
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85 return false; |
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86 } |
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87 |
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88 public String getString(String sectionName, String key, String defaultValue) { |
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89 String value = getSection(sectionName).get(key); |
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90 return value == null ? defaultValue : value; |
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91 } |
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92 |
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93 // TODO handle %include and %unset directives |
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94 // TODO "" and lists |
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95 private void read(File f) { |
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96 if (f == null || !f.canRead()) { |
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97 return; |
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98 } |
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99 if (sections == null) { |
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100 sections = new ArrayList<String>(); |
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101 content = new ArrayList<Map<String,String>>(); |
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102 } |
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103 try { |
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104 BufferedReader br = new BufferedReader(new FileReader(f)); |
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105 String line; |
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106 String sectionName = ""; |
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107 Map<String,String> section = new LinkedHashMap<String, String>(); |
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108 while ((line = br.readLine()) != null) { |
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109 line = line.trim(); |
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110 int x; |
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111 if ((x = line.indexOf('#')) != -1) { |
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112 // do not keep comments in memory, get new, shorter string |
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113 line = new String(line.substring(0, x).trim()); |
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114 } |
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115 if (line.length() <= 2) { // a=b or [a] are at least of length 3 |
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116 continue; |
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117 } |
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118 if (line.charAt(0) == '[' && line.charAt(line.length() - 1) == ']') { |
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119 sectionName = line.substring(1, line.length() - 1); |
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120 if (sections.indexOf(sectionName) == -1) { |
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121 sections.add(sectionName); |
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122 content.add(section = new LinkedHashMap<String, String>()); |
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123 } else { |
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124 section = null; // drop cached value |
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125 } |
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126 } else if ((x = line.indexOf('=')) != -1) { |
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127 // share char[] of the original string |
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128 String key = line.substring(0, x).trim(); |
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129 String value = line.substring(x+1).trim(); |
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130 if (section == null) { |
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131 int i = sections.indexOf(sectionName); |
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132 assert i >= 0; |
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133 section = content.get(i); |
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134 } |
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135 if (sectionName.length() == 0) { |
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136 // add fake section only if there are any values |
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137 sections.add(sectionName); |
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138 content.add(section); |
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139 } |
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140 section.put(key, value); |
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141 } |
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142 } |
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143 br.close(); |
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144 } catch (IOException ex) { |
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145 ex.printStackTrace(); // XXX shall outer world care? |
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146 } |
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147 ((ArrayList<?>) sections).trimToSize(); |
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148 ((ArrayList<?>) content).trimToSize(); |
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149 assert sections.size() == content.size(); |
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150 } |
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151 } |