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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 2008-2012 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 "PluginRDFIndexer.h"
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28 #include "PluginRDFDescription.h"
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29 #include "base/ProgressReporter.h"
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30 #include "plugin/PluginIdentifier.h"
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31
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32 #include "transform/TransformFactory.h"
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33
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34 #include <dataquay/BasicStore.h>
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35 #include <dataquay/PropertyObject.h>
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36
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37 using std::cerr;
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38 using std::endl;
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39
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40 using Dataquay::Uri;
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41 using Dataquay::Node;
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42 using Dataquay::Nodes;
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43 using Dataquay::Triple;
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44 using Dataquay::Triples;
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45 using Dataquay::BasicStore;
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46 using Dataquay::PropertyObject;
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47
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48
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49 class RDFTransformFactoryImpl
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50 {
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51 public:
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52 RDFTransformFactoryImpl(QString url);
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53 virtual ~RDFTransformFactoryImpl();
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54
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55 bool isRDF();
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56 bool isOK();
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57 QString getErrorString() const;
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58
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59 std::vector<Transform> getTransforms(ProgressReporter *);
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60
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61 static QString writeTransformToRDF(const Transform &, QString);
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62
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63 protected:
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64 BasicStore *m_store;
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65 QString m_urlString;
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66 QString m_errorString;
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67 bool m_isRDF;
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68 bool setOutput(Transform &, QString);
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69 bool setParameters(Transform &, QString);
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70 };
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71
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72
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73 QString
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74 RDFTransformFactory::getKnownExtensions()
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75 {
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76 return "*.rdf *.n3 *.ttl";
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77 }
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78
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79 RDFTransformFactory::RDFTransformFactory(QString url) :
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80 m_d(new RDFTransformFactoryImpl(url))
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81 {
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82 }
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83
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84 RDFTransformFactory::~RDFTransformFactory()
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85 {
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86 delete m_d;
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87 }
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88
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89 bool
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90 RDFTransformFactory::isRDF()
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91 {
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92 return m_d->isRDF();
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93 }
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94
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95 bool
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96 RDFTransformFactory::isOK()
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97 {
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98 return m_d->isOK();
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99 }
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100
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101 QString
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102 RDFTransformFactory::getErrorString() const
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103 {
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104 return m_d->getErrorString();
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105 }
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106
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107 std::vector<Transform>
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108 RDFTransformFactory::getTransforms(ProgressReporter *r)
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109 {
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110 return m_d->getTransforms(r);
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111 }
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112
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113 QString
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114 RDFTransformFactory::writeTransformToRDF(const Transform &t, QString f)
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115 {
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116 return RDFTransformFactoryImpl::writeTransformToRDF(t, f);
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117 }
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118
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119 RDFTransformFactoryImpl::RDFTransformFactoryImpl(QString url) :
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120 m_store(new BasicStore),
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121 m_urlString(url),
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122 m_isRDF(false)
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123 {
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124 //!!! retrieve data if remote... then
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125 m_store->addPrefix("vamp", Uri("http://purl.org/ontology/vamp/"));
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126 try {
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127 m_store->import(QUrl::fromLocalFile(url), BasicStore::ImportIgnoreDuplicates);
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128 m_isRDF = true;
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129 } catch (...) { }
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130 }
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131
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132 RDFTransformFactoryImpl::~RDFTransformFactoryImpl()
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133 {
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134 delete m_store;
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135 }
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136
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137 bool
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138 RDFTransformFactoryImpl::isRDF()
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139 {
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140 return m_isRDF;
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141 }
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142
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143 bool
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144 RDFTransformFactoryImpl::isOK()
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145 {
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146 return (m_errorString == "");
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147 }
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148
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149 QString
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150 RDFTransformFactoryImpl::getErrorString() const
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151 {
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152 return m_errorString;
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153 }
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154
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155 std::vector<Transform>
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156 RDFTransformFactoryImpl::getTransforms(ProgressReporter *reporter)
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157 {
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158 std::vector<Transform> transforms;
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159
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160 std::map<QString, Transform> uriTransformMap;
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161
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162 Nodes tnodes = m_store->match
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163 (Triple(Node(), "a", m_store->expand("vamp:Transform"))).a();
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164
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165 foreach (Node tnode, tnodes) {
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166
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167 Node pnode = m_store->matchFirst
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168 (Triple(tnode, "vamp:plugin", Node())).c;
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169
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170 // There are various queries we need to make that might
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171 // include data from either the transform RDF or the model
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172 // accumulated from plugin descriptions. For example, the
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173 // transform RDF may specify the output's true URI, or it
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174 // might have a blank node or some other URI with the
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175 // appropriate vamp:identifier included in the file. To cover
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176 // both cases, we need to add the file itself into the model
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177 // and always query the model using the transform URI rather
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178 // than querying the file itself subsequently.
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179
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180 //!!! ^^^ what does this mean for us with Dataquay? do we need to cross-check outputs against the indexer?
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181
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182 SimpleSPARQLQuery::addSourceToModel(m_urlString);
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183
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184 PluginRDFIndexer *indexer = PluginRDFIndexer::getInstance();
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185
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186 for (int i = 0; i < transformResults.size(); ++i) {
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187
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188 SimpleSPARQLQuery::KeyValueMap &result = transformResults[i];
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189
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190 QString transformUri = result["transform"].value;
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191 QString pluginUri = result["plugin"].value;
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192
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193 QString pluginId = indexer->getIdForPluginURI(pluginUri);
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194 if (pluginId == "") {
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195 cerr << "RDFTransformFactory: WARNING: Unknown plugin <"
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196 << pluginUri << "> for transform <"
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197 << transformUri << ">, skipping this transform"
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198 << endl;
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199 continue;
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200 }
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201
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202 Transform transform;
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203 transform.setPluginIdentifier(pluginId);
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204
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205 if (!setOutput(transform, transformUri)) {
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206 return transforms;
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207 }
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208
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209 if (!setParameters(transform, transformUri)) {
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210 return transforms;
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211 }
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212
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213 uriTransformMap[transformUri] = transform;
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214
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215 // We have to do this a very long way round, to work around
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216 // rasqal's current inability to handle correctly more than one
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217 // OPTIONAL graph in a query
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218
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219 static const char *optionals[] = {
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220 "output",
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221 "program",
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222 "summary_type",
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223 "step_size",
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224 "block_size",
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225 "window_type",
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226 "sample_rate",
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227 "start",
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228 "duration"
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229 };
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230
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231 for (int j = 0; j < sizeof(optionals)/sizeof(optionals[0]); ++j) {
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232
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233 QString optional = optionals[j];
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234
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235 QString queryTemplate =
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236 " PREFIX vamp: <http://purl.org/ontology/vamp/> "
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237
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238 " SELECT ?%1 "
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239
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240 " WHERE { "
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241 " <%2> vamp:%1 ?%1 "
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242 " } ";
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243
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244 SimpleSPARQLQuery query
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245 (SimpleSPARQLQuery::QueryFromModel,
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246 queryTemplate.arg(optional).arg(transformUri));
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247
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248 SimpleSPARQLQuery::ResultList results = query.execute();
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249
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250 if (!query.isOK()) {
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251 m_errorString = query.getErrorString();
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252 return transforms;
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253 }
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254
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255 if (results.empty()) continue;
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256
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257 for (int k = 0; k < results.size(); ++k) {
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258
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259 const SimpleSPARQLQuery::Value &v = results[k][optional];
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260
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261 if (v.type == SimpleSPARQLQuery::LiteralValue) {
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262
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263 if (optional == "program") {
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264 transform.setProgram(v.value);
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265 } else if (optional == "summary_type") {
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266 transform.setSummaryType
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267 (transform.stringToSummaryType(v.value));
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268 } else if (optional == "step_size") {
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269 transform.setStepSize(v.value.toUInt());
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270 } else if (optional == "block_size") {
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271 transform.setBlockSize(v.value.toUInt());
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272 } else if (optional == "window_type") {
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273 transform.setWindowType
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274 (Window<float>::getTypeForName
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275 (v.value.toLower().toStdString()));
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276 } else if (optional == "sample_rate") {
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277 transform.setSampleRate(v.value.toFloat());
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278 } else if (optional == "start") {
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279 transform.setStartTime
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280 (RealTime::fromXsdDuration(v.value.toStdString()));
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281 } else if (optional == "duration") {
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282 transform.setDuration
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283 (RealTime::fromXsdDuration(v.value.toStdString()));
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284 } else {
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285 cerr << "RDFTransformFactory: ERROR: Inconsistent optionals lists (unexpected optional \"" << optional << "\"" << endl;
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286 }
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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 SVDEBUG << "RDFTransformFactory: NOTE: Transform is: " << endl;
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292 cerr << transform.toXmlString() << endl;
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293
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294 transforms.push_back(transform);
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295 }
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296
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297 return transforms;
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298 }
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299
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300 bool
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301 RDFTransformFactoryImpl::setOutput(Transform &transform,
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302 QString transformUri)
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303 {
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304 SimpleSPARQLQuery::Value outputValue =
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305 SimpleSPARQLQuery::singleResultQuery
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306 (SimpleSPARQLQuery::QueryFromModel,
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307 QString
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308 (
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309 " PREFIX vamp: <http://purl.org/ontology/vamp/> "
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310
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311 " SELECT ?output_id "
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312
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313 " WHERE { "
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314 " <%1> vamp:output ?output . "
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315 " ?output vamp:identifier ?output_id "
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316 " } "
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317 )
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318 .arg(transformUri),
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319 "output_id");
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320
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321 if (outputValue.type == SimpleSPARQLQuery::NoValue) {
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322 return true;
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323 }
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324
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325 if (outputValue.type != SimpleSPARQLQuery::LiteralValue) {
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326 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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327 return false;
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328 }
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329
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330 transform.setOutput(outputValue.value);
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331
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332 return true;
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333 }
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334
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335
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336 bool
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337 RDFTransformFactoryImpl::setParameters(Transform &transform,
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338 QString transformUri)
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339 {
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340 SimpleSPARQLQuery paramQuery
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341 (SimpleSPARQLQuery::QueryFromModel,
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342 QString
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343 (
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344 " PREFIX vamp: <http://purl.org/ontology/vamp/> "
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345
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346 " SELECT ?param_id ?param_value "
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347
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348 " WHERE { "
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349 " <%1> vamp:parameter_binding ?binding . "
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350 " ?binding vamp:parameter ?param ; "
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351 " vamp:value ?param_value . "
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352 " ?param vamp:identifier ?param_id "
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353 " } "
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354 )
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355 .arg(transformUri));
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356
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357 SimpleSPARQLQuery::ResultList paramResults = paramQuery.execute();
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358
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359 if (!paramQuery.isOK()) {
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360 m_errorString = paramQuery.getErrorString();
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361 return false;
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362 }
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363
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364 if (paramQuery.wasCancelled()) {
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365 m_errorString = "Query cancelled";
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366 return false;
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367 }
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368
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369 for (int j = 0; j < paramResults.size(); ++j) {
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370
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371 QString paramId = paramResults[j]["param_id"].value;
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372 QString paramValue = paramResults[j]["param_value"].value;
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373
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374 if (paramId == "" || paramValue == "") continue;
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375
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376 transform.setParameter(paramId, paramValue.toFloat());
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377 }
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378
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379 return true;
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380 }
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381
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382 QString
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383 RDFTransformFactoryImpl::writeTransformToRDF(const Transform &transform,
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384 QString uri)
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385 {
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386 QString str;
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387 QTextStream s(&str);
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388
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389 // assumes the usual prefixes are available; requires that uri be
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390 // a local fragment (e.g. ":transform") rather than a uri enclosed
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391 // in <>, so that we can suffix it if need be
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392
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393 QString pluginId = transform.getPluginIdentifier();
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394 QString pluginUri = PluginRDFIndexer::getInstance()->getURIForPluginId(pluginId);
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395
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396 if (pluginUri != "") {
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397 s << uri << " a vamp:Transform ;" << endl;
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398 s << " vamp:plugin <" << QUrl(pluginUri).toEncoded().data() << "> ;" << endl;
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399 } else {
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400 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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401 QString type, soname, label;
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Chris@503
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402 PluginIdentifier::parseIdentifier(pluginId, type, soname, label);
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Chris@503
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403 s << uri << "_plugin a vamp:Plugin ;" << endl;
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Chris@503
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404 s << " vamp:identifier \"" << label << "\" .\n" << endl;
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Chris@503
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405 s << uri << "_library a vamp:PluginLibrary ;" << endl;
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Chris@503
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406 s << " vamp:identifier \"" << soname << "\" ;" << endl;
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Chris@503
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407 s << " vamp:available_plugin " << uri << "_plugin .\n" << endl;
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Chris@503
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408 s << uri << " a vamp:Transform ;" << endl;
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Chris@503
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409 s << " vamp:plugin " << uri << "_plugin ;" << endl;
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Chris@503
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410 }
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Chris@503
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411
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Chris@494
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412 PluginRDFDescription description(pluginId);
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Chris@503
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413 QString outputId = transform.getOutput();
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Chris@503
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414 QString outputUri = description.getOutputUri(outputId);
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Chris@494
|
415
|
Chris@494
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416 if (transform.getOutput() != "" && outputUri == "") {
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Chris@686
|
417 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
|
418 }
|
Chris@494
|
419
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Chris@494
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420 if (transform.getStepSize() != 0) {
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Chris@494
|
421 s << " vamp:step_size \"" << transform.getStepSize() << "\"^^xsd:int ; " << endl;
|
Chris@494
|
422 }
|
Chris@494
|
423 if (transform.getBlockSize() != 0) {
|
Chris@494
|
424 s << " vamp:block_size \"" << transform.getBlockSize() << "\"^^xsd:int ; " << endl;
|
Chris@494
|
425 }
|
Chris@494
|
426 if (transform.getStartTime() != RealTime::zeroTime) {
|
Chris@494
|
427 s << " vamp:start \"" << transform.getStartTime().toXsdDuration().c_str() << "\"^^xsd:duration ; " << endl;
|
Chris@494
|
428 }
|
Chris@494
|
429 if (transform.getDuration() != RealTime::zeroTime) {
|
Chris@494
|
430 s << " vamp:duration \"" << transform.getDuration().toXsdDuration().c_str() << "\"^^xsd:duration ; " << endl;
|
Chris@494
|
431 }
|
Chris@494
|
432 if (transform.getSampleRate() != 0) {
|
Chris@494
|
433 s << " vamp:sample_rate \"" << transform.getSampleRate() << "\"^^xsd:float ; " << endl;
|
Chris@494
|
434 }
|
Chris@494
|
435
|
Chris@494
|
436 QString program = transform.getProgram();
|
Chris@494
|
437 if (program != "") {
|
Chris@494
|
438 s << " vamp:program \"\"\"" << program << "\"\"\" ;" << endl;
|
Chris@494
|
439 }
|
Chris@494
|
440
|
Chris@508
|
441 QString summary = transform.summaryTypeToString(transform.getSummaryType());
|
Chris@508
|
442 if (summary != "") {
|
Chris@508
|
443 s << " vamp:summary_type \"" << summary << "\" ;" << endl;
|
Chris@508
|
444 }
|
Chris@508
|
445
|
Chris@494
|
446 Transform::ParameterMap parameters = transform.getParameters();
|
Chris@494
|
447 for (Transform::ParameterMap::const_iterator i = parameters.begin();
|
Chris@494
|
448 i != parameters.end(); ++i) {
|
Chris@494
|
449 QString name = i->first;
|
Chris@494
|
450 float value = i->second;
|
Chris@494
|
451 s << " vamp:parameter_binding [" << endl;
|
Chris@494
|
452 s << " vamp:parameter [ vamp:identifier \"" << name << "\" ] ;" << endl;
|
Chris@494
|
453 s << " vamp:value \"" << value << "\"^^xsd:float ;" << endl;
|
Chris@494
|
454 s << " ] ;" << endl;
|
Chris@494
|
455 }
|
Chris@494
|
456
|
Chris@494
|
457 if (outputUri != "") {
|
Chris@592
|
458 s << " vamp:output <" << QUrl(outputUri).toEncoded().data() << "> ." << endl;
|
Chris@503
|
459 } else if (outputId != "") {
|
Chris@503
|
460 s << " vamp:output [ vamp:identifier \"" << outputId << "\" ] ." << endl;
|
Chris@494
|
461 } else {
|
Chris@494
|
462 s << " ." << endl;
|
Chris@494
|
463 }
|
Chris@494
|
464
|
Chris@494
|
465 return str;
|
Chris@494
|
466 }
|
Chris@494
|
467
|