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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 Sonic Visualiser
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5 An audio file viewer and annotation editor.
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6 Centre for Digital Music, Queen Mary, University of London.
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7 This file copyright 2008 QMUL.
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8
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9 This program is free software; you can redistribute it and/or
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10 modify it under the terms of the GNU General Public License as
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11 published by the Free Software Foundation; either version 2 of the
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12 License, or (at your option) any later version. See the file
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13 COPYING included with this distribution for more information.
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14 */
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15
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16 #include "PluginRDFIndexer.h"
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17
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18 #include "SimpleSPARQLQuery.h"
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19
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20 //!!!#include "data/fileio/FileSource.h"
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21 #include "data/fileio/CachedFile.h"
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22 #include "data/fileio/PlaylistFileReader.h"
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23 #include "plugin/PluginIdentifier.h"
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24
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25 #include "base/Profiler.h"
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26
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27 #include <vamp-sdk/PluginHostAdapter.h>
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28
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29 #include <QFileInfo>
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30 #include <QDir>
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31 #include <QUrl>
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32 #include <QDateTime>
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33 #include <QSettings>
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34 #include <QFile>
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35
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36 #include <iostream>
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37 using std::cerr;
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38 using std::endl;
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39 using std::vector;
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40 using std::string;
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41 using Vamp::PluginHostAdapter;
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42
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43 PluginRDFIndexer *
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44 PluginRDFIndexer::m_instance = 0;
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45
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46 PluginRDFIndexer *
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47 PluginRDFIndexer::getInstance()
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48 {
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49 if (!m_instance) m_instance = new PluginRDFIndexer();
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50 return m_instance;
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51 }
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52
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53 PluginRDFIndexer::PluginRDFIndexer()
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54 {
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55 vector<string> paths = PluginHostAdapter::getPluginPath();
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56
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57 QStringList filters;
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58 filters << "*.n3";
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59 filters << "*.N3";
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60 filters << "*.rdf";
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61 filters << "*.RDF";
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62
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63 // Search each Vamp plugin path for a .rdf file that either has
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64 // name "soname", "soname:label" or "soname/label" plus RDF
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65 // extension. Use that order of preference, and prefer n3 over
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66 // rdf extension.
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67
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68 for (vector<string>::const_iterator i = paths.begin(); i != paths.end(); ++i) {
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69
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70 QDir dir(i->c_str());
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71 if (!dir.exists()) continue;
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72
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73 QStringList entries = dir.entryList
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74 (filters, QDir::Files | QDir::Readable);
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75
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76 for (QStringList::const_iterator j = entries.begin();
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77 j != entries.end(); ++j) {
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78 QFileInfo fi(dir.filePath(*j));
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79 indexFile(fi.absoluteFilePath());
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80 }
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81
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82 QStringList subdirs = dir.entryList
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83 (QDir::AllDirs | QDir::NoDotAndDotDot | QDir::Readable);
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84
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85 for (QStringList::const_iterator j = subdirs.begin();
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86 j != subdirs.end(); ++j) {
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87 QDir subdir(dir.filePath(*j));
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88 if (subdir.exists()) {
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89 entries = subdir.entryList
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90 (filters, QDir::Files | QDir::Readable);
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91 for (QStringList::const_iterator k = entries.begin();
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92 k != entries.end(); ++k) {
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93 QFileInfo fi(subdir.filePath(*k));
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94 indexFile(fi.absoluteFilePath());
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95 }
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96 }
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97 }
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98 }
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99 }
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100
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101 PluginRDFIndexer::~PluginRDFIndexer()
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102 {
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103 QMutexLocker locker(&m_mutex);
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104 /*!!!
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105 while (!m_sources.empty()) {
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106 delete *m_sources.begin();
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107 m_sources.erase(m_sources.begin());
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108 }
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109 */
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110 }
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111
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112 bool
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113 PluginRDFIndexer::indexConfiguredURLs()
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114 {
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115 std::cerr << "PluginRDFIndexer::indexConfiguredURLs" << std::endl;
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116
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117 QSettings settings;
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118 settings.beginGroup("RDF");
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119
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120 QString indexKey("rdf-indices");
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121 QStringList indices = settings.value(indexKey).toStringList();
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122
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123 for (int i = 0; i < indices.size(); ++i) {
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124
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125 QString index = indices[i];
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126
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127 std::cerr << "PluginRDFIndexer::indexConfiguredURLs: index url is "
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128 << index.toStdString() << std::endl;
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129
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130 /*!!!
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131 expireCacheMaybe(index);
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132
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133 FileSource indexSource(index, 0, FileSource::PersistentCache);
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134 if (!indexSource.isAvailable()) continue;
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135 indexSource.waitForData();
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136 */
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137
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138 CachedFile cf(index);
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139 if (!cf.isOK()) continue;
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140
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141 FileSource indexSource(cf.getLocalFilename());
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142
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143 PlaylistFileReader reader(indexSource);
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144 if (!reader.isOK()) continue;
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145
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146 PlaylistFileReader::Playlist list = reader.load();
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147 for (PlaylistFileReader::Playlist::const_iterator j = list.begin();
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148 j != list.end(); ++j) {
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149 std::cerr << "PluginRDFIndexer::indexConfiguredURLs: url is "
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150 << j->toStdString() << std::endl;
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151 indexURL(*j);
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152 }
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153 }
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154
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155 QString urlListKey("rdf-urls");
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156 QStringList urls = settings.value(urlListKey).toStringList();
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157
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158 for (int i = 0; i < urls.size(); ++i) {
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159 indexURL(urls[i]);
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160 }
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161
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162 settings.endGroup();
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163 return true;
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164 }
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165
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166 QString
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167 PluginRDFIndexer::getURIForPluginId(QString pluginId)
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168 {
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169 QMutexLocker locker(&m_mutex);
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170
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171 if (m_idToUriMap.find(pluginId) == m_idToUriMap.end()) return "";
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172 return m_idToUriMap[pluginId];
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173 }
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174
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175 QString
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176 PluginRDFIndexer::getIdForPluginURI(QString uri)
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177 {
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178 QMutexLocker locker(&m_mutex);
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179
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180 if (m_uriToIdMap.find(uri) == m_uriToIdMap.end()) {
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181
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182 // Haven't found this uri referenced in any document on the
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183 // local filesystem; try resolving the pre-fragment part of
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184 // the uri as a document URL and reading that if possible.
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185
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186 // Because we may want to refer to this document again, we
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187 // cache it locally if it turns out to exist.
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188
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189 cerr << "PluginRDFIndexer::getIdForPluginURI: NOTE: Failed to find a local RDF document describing plugin <" << uri.toStdString() << ">: attempting to retrieve one remotely by guesswork" << endl;
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190
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191 QString baseUrl = QUrl(uri).toString(QUrl::RemoveFragment);
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192
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193 indexURL(baseUrl);
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194
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195 if (m_uriToIdMap.find(uri) == m_uriToIdMap.end()) {
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196 m_uriToIdMap[uri] = "";
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197 }
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198 }
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199
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200 return m_uriToIdMap[uri];
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201 }
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202
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203 QString
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204 PluginRDFIndexer::getDescriptionURLForPluginId(QString pluginId)
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205 {
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206 QMutexLocker locker(&m_mutex);
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207
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208 if (m_idToDescriptionMap.find(pluginId) == m_idToDescriptionMap.end()) return "";
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209 return m_idToDescriptionMap[pluginId];
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210 }
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211
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212 QString
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213 PluginRDFIndexer::getDescriptionURLForPluginURI(QString uri)
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214 {
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215 QMutexLocker locker(&m_mutex);
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216
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217 QString id = getIdForPluginURI(uri);
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218 if (id == "") return "";
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219 return getDescriptionURLForPluginId(id);
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220 }
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221
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222 QStringList
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223 PluginRDFIndexer::getIndexedPluginIds()
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224 {
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225 QMutexLocker locker(&m_mutex);
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226
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227 QStringList ids;
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228 for (StringMap::const_iterator i = m_idToDescriptionMap.begin();
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229 i != m_idToDescriptionMap.end(); ++i) {
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230 ids.push_back(i->first);
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231 }
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232 return ids;
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233 }
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234
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235 bool
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236 PluginRDFIndexer::indexFile(QString filepath)
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237 {
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238 QUrl url = QUrl::fromLocalFile(filepath);
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239 QString urlString = url.toString();
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240 return indexURL(urlString);
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241 }
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242 /*!!!
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243 void
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244 PluginRDFIndexer::expireCacheMaybe(QString urlString)
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245 {
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246 QString cacheFile = FileSource::getPersistentCacheFilePath(urlString);
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247
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248 QSettings settings;
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249 settings.beginGroup("RDF");
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250
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251 QString key("rdf-expiry-times");
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252
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253 QMap<QString, QVariant> expiryMap = settings.value(key).toMap();
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254 QDateTime lastExpiry = expiryMap[urlString].toDateTime();
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255
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256 if (!QFileInfo(cacheFile).exists()) {
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257 expiryMap[urlString] = QDateTime::currentDateTime();
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258 settings.setValue(key, expiryMap);
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259 settings.endGroup();
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260 return;
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261 }
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262
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263 if (!lastExpiry.isValid() ||
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264 (lastExpiry.addDays(2) < QDateTime::currentDateTime())) {
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265
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266 std::cerr << "Expiring old cache file " << cacheFile.toStdString()
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267 << std::endl;
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268
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269 if (QFile(cacheFile).remove()) {
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270
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271 expiryMap[urlString] = QDateTime::currentDateTime();
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272 settings.setValue(key, expiryMap);
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273 }
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274 }
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275
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276 settings.endGroup();
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277 }
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278 */
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279 bool
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280 PluginRDFIndexer::indexURL(QString urlString)
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281 {
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282 Profiler profiler("PluginRDFIndexer::indexURL");
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283
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284 std::cerr << "PluginRDFIndexer::indexURL(" << urlString.toStdString() << ")" << std::endl;
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285
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286 QMutexLocker locker(&m_mutex);
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287
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288 QString localString = urlString;
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289
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290 if (FileSource::isRemote(urlString) &&
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291 FileSource::canHandleScheme(urlString)) {
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292
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293 //!!! how do we avoid hammering the server if it doesn't have
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294 //!!! the file, and/or the network if it can't get through?
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295
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296 CachedFile cf(urlString);
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297 if (!cf.isOK()) {
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298 return false;
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299 }
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300
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301 localString = cf.getLocalFilename();
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302 /*!!!
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303 expireCacheMaybe(urlString);
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304
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305 FileSource *source = new FileSource
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306 (urlString, 0, FileSource::PersistentCache);
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307 if (!source->isAvailable()) {
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308 delete source;
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309 return false;
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310 }
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311 source->waitForData();
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312 localString = QUrl::fromLocalFile(source->getLocalFilename()).toString();
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313 m_sources.insert(source);
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314 */
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315 }
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316
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317 // cerr << "PluginRDFIndexer::indexURL: url = <" << urlString.toStdString() << ">" << endl;
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318
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319 SimpleSPARQLQuery query
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320 (QString
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321 (
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322 " PREFIX vamp: <http://purl.org/ontology/vamp/> "
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323
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324 " SELECT ?plugin ?library_id ?plugin_id "
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325 " FROM <%1> "
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326
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327 " WHERE { "
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328 " ?plugin a vamp:Plugin . "
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329
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330 // Make the identifier and library parts optional, so
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331 // that we can check and report helpfully if one or both
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332 // is absent instead of just getting no results
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333
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334 //!!! No -- because of rasqal's inability to correctly
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335 // handle more than one OPTIONAL graph in a query, let's
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336 // make identifier compulsory after all
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337 //" OPTIONAL { ?plugin vamp:identifier ?plugin_id } . "
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338
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339 " ?plugin vamp:identifier ?plugin_id . "
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340
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341 " OPTIONAL { "
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342 " ?library a vamp:PluginLibrary ; "
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343 " vamp:available_plugin ?plugin ; "
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344 " vamp:identifier ?library_id "
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345 " } "
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346 " } "
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347 )
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348 .arg(localString));
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349
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350 SimpleSPARQLQuery::ResultList results = query.execute();
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351
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352 if (!query.isOK()) {
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353 cerr << "ERROR: PluginRDFIndexer::indexURL: ERROR: Failed to index document at <"
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354 << urlString.toStdString() << ">: "
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355 << query.getErrorString().toStdString() << endl;
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356 return false;
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357 }
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358
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359 if (results.empty()) {
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360 cerr << "PluginRDFIndexer::indexURL: NOTE: Document at <"
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361 << urlString.toStdString()
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362 << "> does not describe any vamp:Plugin resources" << endl;
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363 return false;
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364 }
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365
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366 bool foundSomething = false;
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367 bool addedSomething = false;
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368
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369 for (SimpleSPARQLQuery::ResultList::iterator i = results.begin();
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370 i != results.end(); ++i) {
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371
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372 QString pluginUri = (*i)["plugin"].value;
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373 QString soname = (*i)["library_id"].value;
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374 QString identifier = (*i)["plugin_id"].value;
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375
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376 if (identifier == "") {
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377 cerr << "PluginRDFIndexer::indexURL: NOTE: Document at <"
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378 << urlString.toStdString()
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379 << "> fails to define any vamp:identifier for plugin <"
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380 << pluginUri.toStdString() << ">"
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381 << endl;
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382 continue;
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383 }
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384 if (soname == "") {
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385 cerr << "PluginRDFIndexer::indexURL: NOTE: Document at <"
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386 << urlString.toStdString() << "> does not associate plugin <"
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387 << pluginUri.toStdString() << "> with any implementation library"
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Chris@439
|
388 << endl;
|
Chris@439
|
389 continue;
|
Chris@439
|
390 }
|
Chris@439
|
391 /*
|
Chris@439
|
392 cerr << "PluginRDFIndexer::indexURL: Document for plugin \""
|
Chris@439
|
393 << soname.toStdString() << ":" << identifier.toStdString()
|
Chris@439
|
394 << "\" (uri <" << pluginUri.toStdString() << ">) is at url <"
|
Chris@439
|
395 << urlString.toStdString() << ">" << endl;
|
Chris@439
|
396 */
|
Chris@439
|
397 QString pluginId = PluginIdentifier::createIdentifier
|
Chris@439
|
398 ("vamp", soname, identifier);
|
Chris@439
|
399
|
Chris@439
|
400 foundSomething = true;
|
Chris@439
|
401
|
Chris@439
|
402 if (m_idToDescriptionMap.find(pluginId) != m_idToDescriptionMap.end()) {
|
Chris@439
|
403 cerr << "PluginRDFIndexer::indexURL: NOTE: Plugin id \""
|
Chris@439
|
404 << pluginId.toStdString() << "\", described in document at <"
|
Chris@439
|
405 << urlString.toStdString()
|
Chris@439
|
406 << ">, has already been described in document <"
|
Chris@439
|
407 << m_idToDescriptionMap[pluginId].toStdString()
|
Chris@439
|
408 << ">: ignoring this new description" << endl;
|
Chris@439
|
409 continue;
|
Chris@439
|
410 }
|
Chris@439
|
411
|
Chris@439
|
412 m_idToDescriptionMap[pluginId] = urlString;
|
Chris@439
|
413 m_idToUriMap[pluginId] = pluginUri;
|
Chris@439
|
414
|
Chris@439
|
415 addedSomething = true;
|
Chris@439
|
416
|
Chris@439
|
417 if (pluginUri != "") {
|
Chris@439
|
418 if (m_uriToIdMap.find(pluginUri) != m_uriToIdMap.end()) {
|
Chris@439
|
419 cerr << "PluginRDFIndexer::indexURL: WARNING: Found multiple plugins with the same URI:" << endl;
|
Chris@439
|
420 cerr << " 1. Plugin id \"" << m_uriToIdMap[pluginUri].toStdString() << "\"" << endl;
|
Chris@439
|
421 cerr << " described in <" << m_idToDescriptionMap[m_uriToIdMap[pluginUri]].toStdString() << ">" << endl;
|
Chris@439
|
422 cerr << " 2. Plugin id \"" << pluginId.toStdString() << "\"" << endl;
|
Chris@439
|
423 cerr << " described in <" << urlString.toStdString() << ">" << endl;
|
Chris@439
|
424 cerr << "both claim URI <" << pluginUri.toStdString() << ">" << endl;
|
Chris@439
|
425 } else {
|
Chris@439
|
426 m_uriToIdMap[pluginUri] = pluginId;
|
Chris@439
|
427 }
|
Chris@439
|
428 }
|
Chris@439
|
429 }
|
Chris@439
|
430
|
Chris@439
|
431 if (!foundSomething) {
|
Chris@439
|
432 cerr << "PluginRDFIndexer::indexURL: NOTE: Document at <"
|
Chris@439
|
433 << urlString.toStdString()
|
Chris@439
|
434 << "> does not sufficiently describe any plugins" << endl;
|
Chris@439
|
435 }
|
Chris@439
|
436
|
Chris@439
|
437 return addedSomething;
|
Chris@439
|
438 }
|
Chris@439
|
439
|
Chris@439
|
440
|
Chris@439
|
441
|