/**
* Builds the SPARQL query
*/
private function _buildQueries()
{
$query = new Erfurt_Sparql_Query2();
$uri = new Erfurt_Sparql_Query2_IriRef($this->_uri);
$predVar = new Erfurt_Sparql_Query2_Var('predicate');
$objVar = new Erfurt_Sparql_Query2_Var('object');
$query->addTriple($uri, $predVar, $objVar);
$query->addFilter(new Erfurt_Sparql_Query2_UnaryExpressionNot(new Erfurt_Sparql_Query2_isBlank($objVar)));
if (!empty($this->_ignoredPredicates)) {
$or = new Erfurt_Sparql_Query2_ConditionalAndExpression();
$filter = new Erfurt_Sparql_Query2_Filter($or);
foreach ($this->_ignoredPredicates as $ignored) {
$or->addElement(new Erfurt_Sparql_Query2_UnaryExpressionNot(new Erfurt_Sparql_Query2_sameTerm($predVar, new Erfurt_Sparql_Query2_IriRef($ignored))));
}
$query->getWhere()->addElement($filter);
}
$query->setDistinct(true)->addProjectionVar($predVar)->addProjectionVar($objVar)->getOrder()->add($predVar);
$queries = array();
$closure = Erfurt_App::getInstance()->getStore()->getImportsClosure($this->_model->getModelUri(), true);
$queryGraphs = array_merge(array($this->_graph), $closure);
foreach ($queryGraphs as $currentGraph) {
$query->setFroms(array($currentGraph));
$queries[$currentGraph] = clone $query;
}
return $queries;
}
public static function addFilterHelper(Erfurt_Sparql_Query2 $query, Erfurt_Sparql_Query2_Var $resVar, $predicate, $type, $value)
{
if (is_string($predicate)) {
$predicate = new Erfurt_Sparql_Query2_IriRef($predicate);
}
if (!$predicate instanceof Erfurt_Sparql_Query2_IriRef) {
throw new RuntimeException('Argument 3 passed to Erfurt_Sparql_Query2_Abstraction_ClassNode::addFilterHelper must be an instance of Erfurt_Sparql_Query2_IriRef instance of ' . typeHelper($predicate) . ' given');
}
switch ($type) {
case 'contains':
$propVar = new Erfurt_Sparql_Query2_Var($predicate);
$filteringTriple = new Erfurt_Sparql_Query2_Triple($resVar, $predicate, $propVar);
$filterExp = new Erfurt_Sparql_Query2_Filter(new Erfurt_Sparql_Query2_Regex($propVar, new Erfurt_Sparql_Query2_RDFLiteral($value)));
$query->getWhere()->addElement($filteringTriple);
$query->getWhere()->addElement($filterExp);
return array($filteringTriple, $filterExp);
break;
case 'equals':
$filteringTriple = new Erfurt_Sparql_Query2_Triple($resVar, $predicate, new Erfurt_Sparql_Query2_RDFLiteral($value));
$query->getWhere()->addElement($filteringTriple);
return $filteringTriple;
break;
default:
throw new RuntimeException('Argument 4 passed to Erfurt_Sparql_Query2_Abstraction_ClassNode::addFilterHelper must be "equals" or "contains", ' . $type . ' given');
break;
}
return null;
}
protected function _buildQuery($setup, $forImplicit = false)
{
if (isset($setup->config->query->deeper) && isset($setup->state->parent)) {
//$replace = ;
$queryString = str_replace("%resource%", $setup->state->parent, $setup->config->query->deeper);
$query = Erfurt_Sparql_SimpleQuery::initWithString($queryString);
} else {
$query = new Erfurt_Sparql_Query2();
$query->addElements(NavigationHelper::getSearchTriples($setup, $forImplicit, $this->_config->store->backend));
//$query->setCountStar(true);
$query->setDistinct(true);
$query->addProjectionVar(new Erfurt_Sparql_Query2_Var('resourceUri'));
//$query->addProjectionVar(new Erfurt_Sparql_Query2_Var('subResourceUri'));
// set to _limit+1, so we can see if there are more than $_limit entries
//$query->setLimit($this->_limit + 1);
}
// sorting
if (isset($setup->state->sorting)) {
$query->getOrder()->add(new Erfurt_Sparql_Query2_Var('sortRes'), "ASC");
} elseif (isset($setup->config->ordering->relation)) {
// set ordering
$orderVar = new Erfurt_Sparql_Query2_Var('order');
$query->getWhere()->addElement(new Erfurt_Sparql_Query2_OptionalGraphPattern(array(new Erfurt_Sparql_Query2_Triple(new Erfurt_Sparql_Query2_Var('resourceUri'), new Erfurt_Sparql_Query2_IriRef($setup->config->ordering->relation), $orderVar))));
$query->getOrder()->add($orderVar, $setup->config->ordering->modifier);
}
// set offset
if (isset($setup->state->offset) && $setup->state->lastEvent == 'more') {
$query->setLimit($this->_limit + $setup->state->offset + 1);
} else {
$query->setLimit($this->_limit + 1);
}
return $query;
}
/**
* if the selected resources changed (due to filters or limit or offset)
* we have to change the value query as well (because the resources are mentioned as subjects)
*
* @return OntoWiki_Model_Instances $this
*/
protected function updateValueQuery()
{
if ($this->_valueQueryUptodate) {
return $this;
}
$resources = $this->getShownResources();
foreach ($resources as $key => $resource) {
$resources[$key] = new Erfurt_Sparql_Query2_SameTerm($this->_resourceVar, new Erfurt_Sparql_Query2_IriRef($resource['value']));
}
if ($this->_valueQueryResourceFilter == null) {
$this->_valueQueryResourceFilter = new Erfurt_Sparql_Query2_Filter(new Erfurt_Sparql_Query2_BooleanLiteral(false));
$this->_valueQuery->addElement($this->_valueQueryResourceFilter);
}
$this->_valueQueryResourceFilter->setConstraint(empty($resources) ? new Erfurt_Sparql_Query2_BooleanLiteral(false) : new Erfurt_Sparql_Query2_ConditionalOrExpression($resources));
//fix for a strange issue where a query with only optionals fails
//(but there is a magic/unkown condition, that makes it work for some queries!?)
//if($this->_store->getBackendName() == 'ZendDb'){
$hasTriple = false;
foreach ($this->_valueQuery->getWhere()->getElements() as $element) {
if ($element instanceof Erfurt_Sparql_Query2_IF_TriplesSameSubject) {
$hasTriple = true;
break;
}
}
if (!$hasTriple) {
$this->_valueQuery->getWhere()->addElement(new Erfurt_Sparql_Query2_Triple($this->_resourceVar, new Erfurt_Sparql_Query2_Var('p'), new Erfurt_Sparql_Query2_Var('o')));
}
//}
//remove duplicate triples...
$this->_valueQuery->optimize();
$this->_valueQueryUptodate = true;
return $this;
}
/**
* Method that counts already existing distinct datasets for given uri
*
* @param $uri uri string
*
* @return int distinct existing datasets
*/
private function countUriPattern($uri)
{
$query = new Erfurt_Sparql_Query2();
$query->setDistinct(true);
$unions = new Erfurt_Sparql_Query2_GroupOrUnionGraphPattern();
$subjectVar = new Erfurt_Sparql_Query2_Var('s');
$query->addProjectionVar($subjectVar);
// create six temporary vars (not selected in query)
$tempVars = array();
for ($i = 0; $i < 6; $i++) {
$tempVars[] = new Erfurt_Sparql_Query2_Var('var' . $i);
}
$singlePattern = new Erfurt_Sparql_Query2_GroupGraphPattern();
$singlePattern->addTriple($subjectVar, $tempVars[0], $tempVars[1]);
$unions->addElement($singlePattern);
$singlePattern = new Erfurt_Sparql_Query2_GroupGraphPattern();
$singlePattern->addTriple($tempVars[2], $subjectVar, $tempVars[3]);
$unions->addElement($singlePattern);
$singlePattern = new Erfurt_Sparql_Query2_GroupGraphPattern();
$singlePattern->addTriple($tempVars[4], $tempVars[5], $subjectVar);
$unions->addElement($singlePattern);
$query->getWhere()->addElement($unions);
$filter = new Erfurt_Sparql_Query2_ConditionalOrExpression();
$filter->addElement(new Erfurt_Sparql_Query2_Regex($subjectVar, new Erfurt_Sparql_Query2_RDFLiteral('^' . $uri), new Erfurt_Sparql_Query2_RDFLiteral('i')));
$query->addFilter($filter);
$result = $this->_owApp->erfurt->getStore()->countWhereMatches($this->_model->getModelIri(), $query->getWhere(), 's', true);
return $result;
}
