private function doResolveInnerConditionRecursively(DIProperty $property, Description $description)
{
$innerOrderByProperty = null;
// Find out if we should order by the values of this property
if (array_key_exists($property->getKey(), $this->compoundConditionBuilder->getSortKeys())) {
$innerOrderByProperty = $property;
}
// Prepare inner condition
$innerJoinVariable = $this->compoundConditionBuilder->getNextVariable();
$innerCondition = $this->compoundConditionBuilder->mapDescriptionToCondition($description, $innerJoinVariable, $innerOrderByProperty);
return array($innerOrderByProperty, $innerCondition, $innerJoinVariable);
}
/**
* @note rdfs:subPropertyOf* where * means a property path of arbitrary length
* can be found using the "zero or more" will resolve the complete path
*
* @see http://www.w3.org/TR/sparql11-query/#propertypath-arbitrary-length
*/
private function tryToAddPropertyPathForSaturatedHierarchy(&$condition, DIProperty $property, &$propertyName)
{
if (!$this->compoundConditionBuilder->canUseQFeature(SMW_SPARQL_QF_SUBP) || !$property->isUserDefined()) {
return null;
}
if ($this->compoundConditionBuilder->getPropertyHierarchyLookup() == null || !$this->compoundConditionBuilder->getPropertyHierarchyLookup()->hasSubpropertyFor($property)) {
return null;
}
$subPropExpElement = $this->exporter->getSpecialPropertyResource('_SUBP', SMW_NS_PROPERTY);
$propertyByVariable = '?' . $this->compoundConditionBuilder->getNextVariable('sp');
$condition->weakConditions[$propertyName] = "\n" . "{$propertyByVariable} " . $subPropExpElement->getQName() . "*" . " {$propertyName} .\n" . "";
$propertyName = $propertyByVariable;
}
private function tryToAddClassHierarchyPattern($category, &$categoryExpName)
{
if (!$this->compoundConditionBuilder->canUseQFeature(SMW_SPARQL_QF_SUBC)) {
return '';
}
if ($this->compoundConditionBuilder->getPropertyHierarchyLookup() === null || !$this->compoundConditionBuilder->getPropertyHierarchyLookup()->hasSubcategoryFor($category)) {
return '';
}
$subClassExpElement = $this->exporter->getSpecialPropertyResource('_SUBC');
$classHierarchyByVariable = "?" . $this->compoundConditionBuilder->getNextVariable('sc');
$condition = "{$classHierarchyByVariable} " . $subClassExpElement->getQName() . "*" . " {$categoryExpName} .\n";
$categoryExpName = "{$classHierarchyByVariable}";
return $condition;
}
private function createConditionFromSubConditionElements($subConditionElements, $joinVariable)
{
if ($subConditionElements->unionCondition === '') {
return $this->createFilterCondition($subConditionElements);
}
if ($subConditionElements->filter === '') {
return $this->createWhereCondition($subConditionElements);
}
$subJoinVariable = $this->compoundConditionBuilder->getNextVariable();
$subConditionElements->unionCondition = str_replace("?{$joinVariable} ", "?{$subJoinVariable} ", $subConditionElements->unionCondition);
$subConditionElements->filter .= " || ?{$joinVariable} = ?{$subJoinVariable}";
$subConditionElements->hasSafeSubconditions = false;
$subConditionElements->unionCondition = "OPTIONAL { {$subConditionElements->unionCondition} }\n FILTER( {$subConditionElements->filter} )\n";
return $this->createWhereCondition($subConditionElements);
}
private function createFilterConditionToMatchRegexPattern($dataItem, &$joinVariable, $comparator, $pattern)
{
if ($dataItem instanceof DIBlob) {
return new FilterCondition("{$comparator}( ?{$joinVariable}, \"{$pattern}\", \"s\")", array());
}
if ($dataItem instanceof DIUri) {
return new FilterCondition("{$comparator}( str( ?{$joinVariable} ), \"{$pattern}\", \"i\")", array());
}
// Pattern search for a wikipage object can only be done on the sortkey
// literal and not on it's resource
$skeyExpElement = Exporter::getInstance()->getSpecialPropertyResource('_SKEY');
$expElement = $this->exporter->getDataItemExpElement($dataItem->getSortKeyDataItem());
$condition = new SingletonCondition($expElement);
$filterVariable = $this->compoundConditionBuilder->getNextVariable();
$condition->condition = "?{$joinVariable} " . $skeyExpElement->getQName() . " ?{$filterVariable} .\n";
$condition->matchElement = "?{$joinVariable}";
$filterCondition = new FilterCondition("{$comparator}( ?{$filterVariable}, \"{$pattern}\", \"s\")", array());
$condition->weakConditions = array($filterVariable => $filterCondition->getCondition());
return $condition;
}
