Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/ConfigFile.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 a37ce7145c3f
children 9fb990c8a724
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
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a3a2e5deb320 Updated contact address to support@hg4j.com
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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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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 * .ini / .rc file reader
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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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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 public ConfigFile() {
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40 }
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41
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42 public void addLocation(File path) throws IOException {
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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 public List<String> getSectionNames() {
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51 return sections == null ? Collections.<String>emptyList() : Collections.unmodifiableList(sections);
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52 }
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54 public Map<String,String> getSection(String sectionName) {
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55 if (sections == null) {
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56 return Collections.emptyMap();
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57 }
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58 int x = sections.indexOf(sectionName);
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59 if (x == -1) {
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60 return Collections.emptyMap();
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61 }
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62 return Collections.unmodifiableMap(content.get(x));
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63 }
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64
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65 public boolean getBoolean(String sectionName, String key, boolean defaultValue) {
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66 String value = getSection(sectionName).get(key);
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67 if (value == null) {
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68 return defaultValue;
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69 }
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70 for (String s : new String[] { "true", "yes", "on", "1" }) {
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71 if (s.equalsIgnoreCase(value)) {
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72 return true;
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73 }
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74 }
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75 return false;
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76 }
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78 public String getString(String sectionName, String key, String defaultValue) {
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79 String value = getSection(sectionName).get(key);
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80 return value == null ? defaultValue : value;
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81 }
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82
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83 // TODO handle %include and %unset directives
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84 // TODO "" and lists
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85 // XXX perhaps, single string to keep whole section with substrings for keys/values to minimize number of arrays (String.value)
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86 private void read(File f) throws IOException {
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87 if (f == null || !f.canRead()) {
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88 return;
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89 }
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90 if (sections == null) {
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91 sections = new ArrayList<String>();
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92 content = new ArrayList<Map<String,String>>();
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93 }
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94 BufferedReader br = null;
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95 try {
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96 br = new BufferedReader(new FileReader(f));
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97 String line;
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98 String sectionName = "";
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99 Map<String,String> section = new LinkedHashMap<String, String>();
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100 while ((line = br.readLine()) != null) {
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101 line = line.trim();
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102 int x;
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103 if ((x = line.indexOf('#')) != -1) {
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104 // do not keep comments in memory, get new, shorter string
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105 line = new String(line.substring(0, x).trim());
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106 }
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107 if (line.length() <= 2) { // a=b or [a] are at least of length 3
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108 continue;
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109 }
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110 if (line.charAt(0) == '[' && line.charAt(line.length() - 1) == ']') {
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111 sectionName = line.substring(1, line.length() - 1);
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112 if (sections.indexOf(sectionName) == -1) {
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113 sections.add(sectionName);
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114 content.add(section = new LinkedHashMap<String, String>());
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115 } else {
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116 section = null; // drop cached value
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117 }
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118 } else if ((x = line.indexOf('=')) != -1) {
136
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119 // share char[] of the original string
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120 String key = line.substring(0, x).trim();
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121 String value = line.substring(x+1).trim();
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122 if (section == null) {
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123 int i = sections.indexOf(sectionName);
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124 assert i >= 0;
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125 section = content.get(i);
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126 }
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127 if (sectionName.length() == 0) {
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128 // add fake section only if there are any values
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129 sections.add(sectionName);
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130 content.add(section);
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131 }
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132 section.put(key, value);
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133 }
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134 }
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135 } finally {
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136 ((ArrayList<?>) sections).trimToSize();
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137 ((ArrayList<?>) content).trimToSize();
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138 if (br != null) {
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139 br.close();
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140 }
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141 }
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142 assert sections.size() == content.size();
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143 }
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144 }