/** @see Erfurt_Store_Adapter_Interface */
public function countWhereMatches($graphIris, $whereSpec, $countSpec, $distinct = false)
{
$query = new Erfurt_Sparql_SimpleQuery();
if (!$distinct) {
$query->setProloguePart("COUNT DISTINCT {$countSpec}");
// old way: distinct has no effect !!!
} else {
$query->setProloguePart("COUNT-DISTINCT {$countSpec}");
// i made a (unccol) hack to fix this, the "-" ist there because i didnt want to change tokenization
}
$query->setFrom($graphIris)->setWherePart($whereSpec);
$result = $this->sparqlQuery($query);
if ($result) {
return $result;
}
return 0;
}
/**
* Get the configuration for a graph.
* @param string $graphUri to specity the graph
* @return array
*/
public function getGraphConfiguration($graphUri)
{
if (null === $this->_graphConfigurations) {
$sysOntModelUri = $this->getOption('modelUri');
// Fetch the graph configurations
$queryObject = new Erfurt_Sparql_SimpleQuery();
$queryObject->setProloguePart('SELECT ?s ?p ?o');
$queryObject->setFrom(array($sysOntModelUri));
$queryObject->setWherePart('WHERE { ?s ?p ?o . ?s a <http://ns.ontowiki.net/SysOnt/Model> }');
$queryoptions = array('use_ac' => false, 'result_format' => Erfurt_Store::RESULTFORMAT_EXTENDED, 'use_additional_imports' => false);
$stmtArray = array();
if ($result = $this->sparqlQuery($queryObject, $queryoptions)) {
$result = $result['results'];
foreach ($result['bindings'] as $row) {
if (!isset($stmtArray[$row['s']['value']])) {
$stmtArray[$row['s']['value']] = array();
}
if (!isset($stmtArray[$row['s']['value']][$row['p']['value']])) {
$stmtArray[$row['s']['value']][$row['p']['value']] = array();
}
if ($row['o']['type'] === 'typed-literal') {
$row['o']['type'] = 'literal';
}
if (isset($row['o']['xml:lang'])) {
$row['o']['lang'] = $row['o']['xml:lang'];
unset($row['o']['xml:lang']);
}
$stmtArray[$row['s']['value']][$row['p']['value']][] = $row['o'];
}
}
$this->_graphConfigurations = $stmtArray;
}
if (isset($this->_graphConfigurations[$graphUri])) {
return $this->_graphConfigurations[$graphUri];
}
return array();
}
/**
* Get all observations which fits to given DSD, DS and selected compontents.
* @param $dataSetUrl URL of a data set
* @param $selectedComponentDimensions
*/
public function getObservations($dataSetUrl, $selectedComponentDimensions = array())
{
// generate unique hash using given result and model uri
$objectId = md5($this->_model->getModelIri() . $dataSetUrl . json_encode($selectedComponentDimensions));
// check there is already a cached object for this hash
$result = $this->_objectCache->load($objectId);
if (false === $result) {
$this->_queryCache->startTransaction($objectId);
/**
* Fill SimpleQuery object with live!
*/
$queryObject = new Erfurt_Sparql_SimpleQuery();
// SELECT
$queryObject->setProloguePart('SELECT ?s ?p ?o');
// FROM
$queryObject->setFrom(array($this->_model->getModelIri()));
// WHERE
$where = 'WHERE { ' . "\n" . '
?s ?p ?o .' . "\n" . '
?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <' . DataCube_UriOf::Observation . '> .' . "\n" . '
?s <' . DataCube_UriOf::DataSetRelation . '> <' . $dataSetUrl . '> .' . "\n";
// Set selected properties (e.g. ?s <http://data.lod2.eu/scoreboard/properties/year> ?d0 .)
$i = 0;
foreach ($selectedComponentDimensions as $dimension) {
if (0 < count($dimension['__cv_elements'])) {
$where .= ' ?s <' . $dimension[DataCube_UriOf::Dimension] . '> ?d' . $i++ . ' .' . "\n";
}
}
// Set FILTER
// e.g.: FILTER (?d1 = "2003" OR ?d1 = "2001" OR ?d1 = "2002")
// e.g. 2: FILTER ( ?d0 = <http://data.lod2.eu/scoreboard/indicators/bb_fcov_RURAL_POP__pop> OR
// ?d0 = <http://data.lod2.eu/scoreboard/indicators/bb_lines_TOTAL_FBB_nbr_lines> )
$i = 0;
foreach ($selectedComponentDimensions as $dimension) {
$dimensionElements = $dimension['__cv_elements'];
if (0 < count($dimensionElements)) {
$filter = array();
foreach ($dimensionElements as $elementUri => $element) {
// If __cv_uri is set and an URL
if (true == Erfurt_Uri::check($element['__cv_uri'])) {
$value = '<' . $element['__cv_uri'] . '>';
$filter[] = ' ?d' . $i . ' = ' . $value . ' ';
} else {
$value = '"' . $element['__cv_niceLabel'] . '"';
$filter[] = ' xsd:string(?d' . $i . ') = xsd:string(' . $value . ') ';
}
}
$i++;
$where .= ' FILTER (' . implode('OR', $filter) . ') ' . "\n";
}
}
$where .= '}';
$queryObject->setWherePart($where);
$result = $this->_model->sparqlQuery((string) $queryObject);
// generate associative array out of given observation result
$result = $this->generateAssocSPOArrayFromSparqlResult($result, 's', 'p', 'o');
// limit the number of observations
$result = array_slice($result, 0, 250);
// enrich data with CubeViz sugar
$result = $this->enrichResult($result, false);
// close the object cache transaction
$this->_queryCache->endTransaction($objectId);
// save the result value in the object cache
$this->_objectCache->save($result, $objectId);
}
return $result;
}
