/**
* Given an Description that is just a conjunction or disjunction of
* ValueDescription objects, create and return a plain WHERE condition
* string for it.
*
* @param $query
* @param ValueDescription $description
* @param DataItemHandler $diHandler for that table
* @param string $operator SQL operator "AND" or "OR"
*/
private function mapValueDescription($query, ValueDescription $description, DataItemHandler $diHandler, $operator)
{
$where = '';
$dataItem = $description->getDataItem();
$db = $this->queryBuilder->getStore()->getConnection('mw.db');
// TODO Better get the handle from the property type
// Some comparators (e.g. LIKE) could use DI values of
// a different type; we care about the property table, not
// about the value
// Do not support smw_id joined data for now.
$indexField = $diHandler->getIndexField();
//Hack to get to the field used as index
$keys = $diHandler->getWhereConds($dataItem);
$value = $keys[$indexField];
// See if the getSQLCondition method exists and call it if this is the case.
// Invoked by SMAreaValueDescription, SMGeoCoordsValueDescription
if (method_exists($description, 'getSQLCondition')) {
$fields = $diHandler->getTableFields();
$where = $description->getSQLCondition($query->alias, array_keys($fields), $this->queryBuilder->getStore()->getConnection(DB_SLAVE));
}
if ($where == '') {
$comparator = $this->comparatorMapper->mapComparator($description, $value);
$where = "{$query->alias}.{$indexField}{$comparator}" . $db->addQuotes($value);
}
if ($where !== '') {
if ($query->where && substr($query->where, -1) != '(') {
$query->where .= " {$operator} ";
}
$query->where .= "({$where})";
}
}
/**
* @dataProvider comparatorProvider
*/
public function testSQLComparatorElement($comparator, $value, $expected)
{
$valueDescription = $this->getMockBuilder('\\SMW\\Query\\Language\\ValueDescription')->disableOriginalConstructor()->getMock();
$valueDescription->expects($this->once())->method('getComparator')->will($this->returnValue($comparator));
$instance = new ComparatorMapper();
$this->assertEquals($expected['comparator'], $instance->mapComparator($valueDescription, $value));
$this->assertEquals($expected['value'], $value);
}
/**
* Only type '_wpg' objects can appear on query level (essentially as nominal classes)
*
* @since 2.2
*
* @param Description $description
*
* @return QuerySegment
*/
public function interpretDescription(Description $description)
{
$query = new QuerySegment();
if (!$description->getDataItem() instanceof DIWikiPage) {
return $query;
}
if ($description->getComparator() === SMW_CMP_EQ) {
$query->type = QuerySegment::Q_VALUE;
$oid = $this->querySegmentListBuilder->getStore()->getObjectIds()->getSMWPageID($description->getDataItem()->getDBkey(), $description->getDataItem()->getNamespace(), $description->getDataItem()->getInterwiki(), $description->getDataItem()->getSubobjectName());
$query->joinfield = array($oid);
} else {
// Join with SMW IDs table needed for other comparators (apply to title string).
$query->joinTable = SMWSql3SmwIds::TABLE_NAME;
$query->joinfield = "{$query->alias}.smw_id";
$value = $description->getDataItem()->getSortKey();
$comparator = $this->comparatorMapper->mapComparator($description, $value);
$query->where = "{$query->alias}.smw_sortkey{$comparator}" . $this->querySegmentListBuilder->getStore()->getConnection('mw.db')->addQuotes($value);
}
return $query;
}