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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 "RDFTransformFactory.h"
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17
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18 #include <map>
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19 #include <vector>
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20
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21 #include <QTextStream>
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22 #include <QUrl>
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23
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24 #include <iostream>
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25 #include <cmath>
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26
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27 #include "SimpleSPARQLQuery.h"
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28 #include "PluginRDFIndexer.h"
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29 #include "PluginRDFDescription.h"
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30 #include "base/ProgressReporter.h"
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31 #include "plugin/PluginIdentifier.h"
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32
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33 #include "transform/TransformFactory.h"
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34
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35 using std::cerr;
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36 using std::endl;
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37
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38 typedef const unsigned char *STR; // redland's expected string type
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39
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40
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41 class RDFTransformFactoryImpl
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42 {
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43 public:
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44 RDFTransformFactoryImpl(QString url);
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45 virtual ~RDFTransformFactoryImpl();
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46
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47 bool isRDF();
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48 bool isOK();
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49 QString getErrorString() const;
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50
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51 std::vector<Transform> getTransforms(ProgressReporter *);
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52
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53 static QString writeTransformToRDF(const Transform &, QString);
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54
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55 protected:
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56 QString m_urlString;
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57 QString m_errorString;
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58 bool m_isRDF;
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59 bool setOutput(Transform &, QString);
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60 bool setParameters(Transform &, QString);
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61 };
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62
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63
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64 QString
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65 RDFTransformFactory::getKnownExtensions()
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66 {
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67 return "*.rdf *.n3 *.ttl";
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68 }
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69
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70 RDFTransformFactory::RDFTransformFactory(QString url) :
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71 m_d(new RDFTransformFactoryImpl(url))
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72 {
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73 }
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74
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75 RDFTransformFactory::~RDFTransformFactory()
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76 {
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77 delete m_d;
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78 }
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79
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80 bool
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81 RDFTransformFactory::isRDF()
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82 {
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83 return m_d->isRDF();
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84 }
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85
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86 bool
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87 RDFTransformFactory::isOK()
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88 {
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89 return m_d->isOK();
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90 }
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91
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92 QString
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93 RDFTransformFactory::getErrorString() const
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94 {
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95 return m_d->getErrorString();
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96 }
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97
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98 std::vector<Transform>
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99 RDFTransformFactory::getTransforms(ProgressReporter *r)
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100 {
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101 return m_d->getTransforms(r);
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102 }
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103
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104 QString
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105 RDFTransformFactory::writeTransformToRDF(const Transform &t, QString f)
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106 {
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107 return RDFTransformFactoryImpl::writeTransformToRDF(t, f);
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108 }
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109
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110 RDFTransformFactoryImpl::RDFTransformFactoryImpl(QString url) :
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111 m_urlString(url),
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112 m_isRDF(false)
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113 {
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114 }
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115
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116 RDFTransformFactoryImpl::~RDFTransformFactoryImpl()
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117 {
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118 SimpleSPARQLQuery::closeSingleSource(m_urlString);
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119 }
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120
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121 bool
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122 RDFTransformFactoryImpl::isRDF()
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123 {
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124 return m_isRDF;
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125 }
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126
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127 bool
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128 RDFTransformFactoryImpl::isOK()
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129 {
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130 return (m_errorString == "");
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131 }
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132
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133 QString
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134 RDFTransformFactoryImpl::getErrorString() const
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135 {
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136 return m_errorString;
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137 }
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138
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139 std::vector<Transform>
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140 RDFTransformFactoryImpl::getTransforms(ProgressReporter *reporter)
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141 {
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142 std::vector<Transform> transforms;
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143
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144 std::map<QString, Transform> uriTransformMap;
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145
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146 QString query =
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147 " PREFIX vamp: <http://purl.org/ontology/vamp/> "
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148
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149 " SELECT ?transform ?plugin "
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150
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151 " FROM <%2> "
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152
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153 " WHERE { "
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154 " ?transform a vamp:Transform ; "
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155 " vamp:plugin ?plugin . "
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156 " } ";
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157
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158 SimpleSPARQLQuery transformsQuery
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159 (SimpleSPARQLQuery::QueryFromSingleSource, query.arg(m_urlString));
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160
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161 SimpleSPARQLQuery::ResultList transformResults = transformsQuery.execute();
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162
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163 if (!transformsQuery.isOK()) {
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164 m_errorString = transformsQuery.getErrorString();
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165 return transforms;
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166 }
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167
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168 m_isRDF = true;
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169
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170 if (transformResults.empty()) {
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171 DEBUG << "RDFTransformFactory: NOTE: No RDF/TTL transform descriptions found in document at <" << m_urlString << ">" << endl;
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172 return transforms;
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173 }
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174
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175 // There are various queries we need to make that might include
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176 // data from either the transform RDF or the model accumulated
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177 // from plugin descriptions. For example, the transform RDF may
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178 // specify the output's true URI, or it might have a blank node or
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179 // some other URI with the appropriate vamp:identifier included in
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180 // the file. To cover both cases, we need to add the file itself
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181 // into the model and always query the model using the transform
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182 // URI rather than querying the file itself subsequently.
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183
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184 SimpleSPARQLQuery::addSourceToModel(m_urlString);
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185
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186 PluginRDFIndexer *indexer = PluginRDFIndexer::getInstance();
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187
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188 for (int i = 0; i < transformResults.size(); ++i) {
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189
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190 SimpleSPARQLQuery::KeyValueMap &result = transformResults[i];
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191
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192 QString transformUri = result["transform"].value;
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193 QString pluginUri = result["plugin"].value;
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194
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195 QString pluginId = indexer->getIdForPluginURI(pluginUri);
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196 if (pluginId == "") {
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197 cerr << "RDFTransformFactory: WARNING: Unknown plugin <"
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198 << pluginUri << "> for transform <"
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199 << transformUri << ">, skipping this transform"
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200 << endl;
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201 continue;
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202 }
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203
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204 Transform transform;
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205 transform.setPluginIdentifier(pluginId);
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206
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207 if (!setOutput(transform, transformUri)) {
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208 return transforms;
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209 }
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210
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211 if (!setParameters(transform, transformUri)) {
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212 return transforms;
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213 }
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214
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215 uriTransformMap[transformUri] = transform;
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216
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217 // We have to do this a very long way round, to work around
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218 // rasqal's current inability to handle correctly more than one
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219 // OPTIONAL graph in a query
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220
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221 static const char *optionals[] = {
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222 "output",
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223 "program",
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224 "summary_type",
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225 "step_size",
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226 "block_size",
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227 "window_type",
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228 "sample_rate",
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229 "start",
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230 "duration"
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231 };
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232
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233 for (int j = 0; j < sizeof(optionals)/sizeof(optionals[0]); ++j) {
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234
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235 QString optional = optionals[j];
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236
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237 QString queryTemplate =
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238 " PREFIX vamp: <http://purl.org/ontology/vamp/> "
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239
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240 " SELECT ?%1 "
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241
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242 " WHERE { "
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243 " <%2> vamp:%1 ?%1 "
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244 " } ";
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245
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246 SimpleSPARQLQuery query
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247 (SimpleSPARQLQuery::QueryFromModel,
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248 queryTemplate.arg(optional).arg(transformUri));
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249
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250 SimpleSPARQLQuery::ResultList results = query.execute();
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251
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252 if (!query.isOK()) {
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253 m_errorString = query.getErrorString();
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254 return transforms;
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255 }
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256
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257 if (results.empty()) continue;
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258
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259 for (int k = 0; k < results.size(); ++k) {
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260
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261 const SimpleSPARQLQuery::Value &v = results[k][optional];
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262
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263 if (v.type == SimpleSPARQLQuery::LiteralValue) {
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264
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265 if (optional == "program") {
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266 transform.setProgram(v.value);
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267 } else if (optional == "summary_type") {
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268 transform.setSummaryType
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269 (transform.stringToSummaryType(v.value));
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270 } else if (optional == "step_size") {
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271 transform.setStepSize(v.value.toUInt());
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272 } else if (optional == "block_size") {
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273 transform.setBlockSize(v.value.toUInt());
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274 } else if (optional == "window_type") {
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275 DEBUG << "NOTE: can't handle window type yet (value is \""
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276 << v.value << "\")" << endl;
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277 } else if (optional == "sample_rate") {
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278 transform.setSampleRate(v.value.toFloat());
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279 } else if (optional == "start") {
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280 transform.setStartTime
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281 (RealTime::fromXsdDuration(v.value.toStdString()));
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282 } else if (optional == "duration") {
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283 transform.setDuration
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284 (RealTime::fromXsdDuration(v.value.toStdString()));
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285 } else {
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286 cerr << "RDFTransformFactory: ERROR: Inconsistent optionals lists (unexpected optional \"" << optional << "\"" << endl;
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287 }
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288 }
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289 }
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290 }
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291
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292 DEBUG << "RDFTransformFactory: NOTE: Transform is: " << endl;
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293 cerr << transform.toXmlString() << endl;
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294
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295 transforms.push_back(transform);
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296 }
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297
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298 return transforms;
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299 }
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300
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301 bool
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302 RDFTransformFactoryImpl::setOutput(Transform &transform,
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303 QString transformUri)
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304 {
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305 SimpleSPARQLQuery::Value outputValue =
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306 SimpleSPARQLQuery::singleResultQuery
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307 (SimpleSPARQLQuery::QueryFromModel,
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308 QString
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309 (
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310 " PREFIX vamp: <http://purl.org/ontology/vamp/> "
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311
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312 " SELECT ?output_id "
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313
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314 " WHERE { "
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315 " <%1> vamp:output ?output . "
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316 " ?output vamp:identifier ?output_id "
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317 " } "
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318 )
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319 .arg(transformUri),
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320 "output_id");
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321
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322 if (outputValue.type == SimpleSPARQLQuery::NoValue) {
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323 return true;
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324 }
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325
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326 if (outputValue.type != SimpleSPARQLQuery::LiteralValue) {
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327 m_errorString = QString("No vamp:identifier found for output of transform <%1>, or vamp:identifier is not a literal").arg(transformUri);
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328 return false;
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329 }
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330
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331 transform.setOutput(outputValue.value);
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332
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333 return true;
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334 }
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335
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336
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337 bool
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338 RDFTransformFactoryImpl::setParameters(Transform &transform,
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339 QString transformUri)
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340 {
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341 SimpleSPARQLQuery paramQuery
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342 (SimpleSPARQLQuery::QueryFromModel,
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343 QString
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344 (
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345 " PREFIX vamp: <http://purl.org/ontology/vamp/> "
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346
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347 " SELECT ?param_id ?param_value "
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348
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349 " WHERE { "
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350 " <%1> vamp:parameter_binding ?binding . "
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351 " ?binding vamp:parameter ?param ; "
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352 " vamp:value ?param_value . "
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353 " ?param vamp:identifier ?param_id "
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354 " } "
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355 )
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356 .arg(transformUri));
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357
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358 SimpleSPARQLQuery::ResultList paramResults = paramQuery.execute();
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359
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360 if (!paramQuery.isOK()) {
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361 m_errorString = paramQuery.getErrorString();
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362 return false;
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363 }
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364
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365 if (paramQuery.wasCancelled()) {
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366 m_errorString = "Query cancelled";
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367 return false;
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368 }
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369
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370 for (int j = 0; j < paramResults.size(); ++j) {
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371
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372 QString paramId = paramResults[j]["param_id"].value;
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373 QString paramValue = paramResults[j]["param_value"].value;
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374
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375 if (paramId == "" || paramValue == "") continue;
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376
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377 transform.setParameter(paramId, paramValue.toFloat());
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378 }
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379
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380 return true;
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381 }
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382
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383 QString
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384 RDFTransformFactoryImpl::writeTransformToRDF(const Transform &transform,
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385 QString uri)
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386 {
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387 QString str;
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388 QTextStream s(&str);
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389
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390 // assumes the usual prefixes are available; requires that uri be
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391 // a local fragment (e.g. ":transform") rather than a uri enclosed
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392 // in <>, so that we can suffix it if need be
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393
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394 QString pluginId = transform.getPluginIdentifier();
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395 QString pluginUri = PluginRDFIndexer::getInstance()->getURIForPluginId(pluginId);
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396
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397 if (pluginUri != "") {
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398 s << uri << " a vamp:Transform ;" << endl;
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399 s << " vamp:plugin <" << QUrl(pluginUri).toEncoded().data() << "> ;" << endl;
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400 } else {
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401 std::cerr << "WARNING: RDFTransformFactory::writeTransformToRDF: No plugin URI available for plugin id \"" << pluginId << "\", writing synthetic plugin and library resources" << std::endl;
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402 QString type, soname, label;
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403 PluginIdentifier::parseIdentifier(pluginId, type, soname, label);
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Chris@503
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404 s << uri << "_plugin a vamp:Plugin ;" << endl;
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Chris@503
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405 s << " vamp:identifier \"" << label << "\" .\n" << endl;
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Chris@503
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406 s << uri << "_library a vamp:PluginLibrary ;" << endl;
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Chris@503
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407 s << " vamp:identifier \"" << soname << "\" ;" << endl;
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Chris@503
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408 s << " vamp:available_plugin " << uri << "_plugin .\n" << endl;
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Chris@503
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409 s << uri << " a vamp:Transform ;" << endl;
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Chris@503
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410 s << " vamp:plugin " << uri << "_plugin ;" << endl;
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Chris@503
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411 }
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Chris@503
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412
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Chris@494
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413 PluginRDFDescription description(pluginId);
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Chris@503
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414 QString outputId = transform.getOutput();
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Chris@503
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415 QString outputUri = description.getOutputUri(outputId);
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Chris@494
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416
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Chris@494
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417 if (transform.getOutput() != "" && outputUri == "") {
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Chris@686
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418 std::cerr << "WARNING: RDFTransformFactory::writeTransformToRDF: No output URI available for transform output id \"" << transform.getOutput() << "\", writing a synthetic output resource" << std::endl;
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Chris@494
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419 }
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Chris@494
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420
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Chris@494
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421 if (transform.getStepSize() != 0) {
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Chris@494
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422 s << " vamp:step_size \"" << transform.getStepSize() << "\"^^xsd:int ; " << endl;
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Chris@494
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423 }
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Chris@494
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424 if (transform.getBlockSize() != 0) {
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Chris@494
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425 s << " vamp:block_size \"" << transform.getBlockSize() << "\"^^xsd:int ; " << endl;
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Chris@494
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426 }
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Chris@494
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427 if (transform.getStartTime() != RealTime::zeroTime) {
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Chris@494
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428 s << " vamp:start \"" << transform.getStartTime().toXsdDuration().c_str() << "\"^^xsd:duration ; " << endl;
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Chris@494
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429 }
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Chris@494
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430 if (transform.getDuration() != RealTime::zeroTime) {
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Chris@494
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431 s << " vamp:duration \"" << transform.getDuration().toXsdDuration().c_str() << "\"^^xsd:duration ; " << endl;
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Chris@494
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432 }
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Chris@494
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433 if (transform.getSampleRate() != 0) {
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Chris@494
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434 s << " vamp:sample_rate \"" << transform.getSampleRate() << "\"^^xsd:float ; " << endl;
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Chris@494
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435 }
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Chris@494
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436
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Chris@494
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437 QString program = transform.getProgram();
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Chris@494
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438 if (program != "") {
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Chris@494
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439 s << " vamp:program \"\"\"" << program << "\"\"\" ;" << endl;
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Chris@494
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440 }
|
Chris@494
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441
|
Chris@508
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442 QString summary = transform.summaryTypeToString(transform.getSummaryType());
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Chris@508
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443 if (summary != "") {
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Chris@508
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444 s << " vamp:summary_type \"" << summary << "\" ;" << endl;
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Chris@508
|
445 }
|
Chris@508
|
446
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Chris@494
|
447 Transform::ParameterMap parameters = transform.getParameters();
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Chris@494
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448 for (Transform::ParameterMap::const_iterator i = parameters.begin();
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Chris@494
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449 i != parameters.end(); ++i) {
|
Chris@494
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450 QString name = i->first;
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Chris@494
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451 float value = i->second;
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Chris@494
|
452 s << " vamp:parameter_binding [" << endl;
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Chris@494
|
453 s << " vamp:parameter [ vamp:identifier \"" << name << "\" ] ;" << endl;
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Chris@494
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454 s << " vamp:value \"" << value << "\"^^xsd:float ;" << endl;
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Chris@494
|
455 s << " ] ;" << endl;
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Chris@494
|
456 }
|
Chris@494
|
457
|
Chris@494
|
458 if (outputUri != "") {
|
Chris@592
|
459 s << " vamp:output <" << QUrl(outputUri).toEncoded().data() << "> ." << endl;
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Chris@503
|
460 } else if (outputId != "") {
|
Chris@503
|
461 s << " vamp:output [ vamp:identifier \"" << outputId << "\" ] ." << endl;
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Chris@494
|
462 } else {
|
Chris@494
|
463 s << " ." << endl;
|
Chris@494
|
464 }
|
Chris@494
|
465
|
Chris@494
|
466 return str;
|
Chris@494
|
467 }
|
Chris@494
|
468
|