public function Intersect(DBSearch $oFilter)
{
if ($oFilter instanceof DBUnionSearch) {
// Develop!
$aFilters = $oFilter->GetSearches();
} else {
$aFilters = array($oFilter);
}
$aSearches = array();
foreach ($aFilters as $oRightFilter) {
$oLeftFilter = $this->DeepClone();
$oRightFilter = $oRightFilter->DeepClone();
if ($oLeftFilter->GetClass() != $oRightFilter->GetClass()) {
if (MetaModel::IsParentClass($oLeftFilter->GetClass(), $oRightFilter->GetClass())) {
// Specialize $oLeftFilter
$oLeftFilter->ChangeClass($oRightFilter->GetClass());
} elseif (MetaModel::IsParentClass($oRightFilter->GetClass(), $oLeftFilter->GetClass())) {
// Specialize $oRightFilter
$oRightFilter->ChangeClass($oLeftFilter->GetClass());
} else {
throw new CoreException("Attempting to merge a filter of class '{$oLeftFilter->GetClass()}' with a filter of class '{$oRightFilter->GetClass()}'");
}
}
$aAliasTranslation = array();
$oLeftFilter->MergeWith_InNamespace($oRightFilter, $oLeftFilter->m_aClasses, $aAliasTranslation);
$oLeftFilter->TransferConditionExpression($oRightFilter, $aAliasTranslation);
$aSearches[] = $oLeftFilter;
}
if (count($aSearches) == 1) {
// return a DBObjectSearch
return $aSearches[0];
} else {
return new DBUnionSearch($aSearches);
}
}