/**
*
* @param string|\blaze\lang\String|\blaze\persistence\ooql\Statement $query
* @return \blaze\persistence\meta\ResultSetDescriptor
*/
private function buildResultSetDescriptor($query)
{
$rsd = null;
//if($query instanceof \blaze\persistence\ooql\Statement)
if ($query instanceof \blaze\persistence\ooql\FromStatement) {
$fromables = $query->getFromClause()->getFromables();
$aliasMapping = array();
// Fields which will occur in the ResultSet
$fields = array();
$collectionFields = array();
// Just to check for name duplicates
$fieldsGlobal = array();
if (count($fromables) < 1) {
throw new \Exception('Invalid Query, nothing set in the from-clause!');
}
// This loop is to check if there are any name duplicates
// and to set up a alias to field mapping
foreach ($fromables as $fromable) {
if ($fromable instanceof \blaze\persistence\ooql\Entity) {
$classMeta = $this->em->getEntityManagerFactory()->getClassDescriptor($fromable->getName());
if ($classMeta === null) {
throw new \blaze\lang\Exception('Entity "' . $fromable->getName() . '" does not exist!');
}
if ($fromable->getAlias() !== null) {
$alias = \blaze\lang\String::asNative($fromable->getAlias());
if (array_search($alias, $aliasMapping) !== false) {
throw new \blaze\lang\Exception('The alias ' . $alias . ' already exists!');
}
$aliasMapping[$alias] = $classMeta;
foreach ($classMeta->getIdentifiers() as $field) {
$fields[$alias][] = $field->getFieldDescriptor();
}
foreach ($classMeta->getSingleFields() as $field) {
$fields[$alias][] = $field;
}
foreach ($classMeta->getCollectionFields() as $field) {
$collectionFields[$alias][] = $field;
}
} else {
$alias = \blaze\lang\String::asNative($fromable->getName());
if (array_search($alias, $aliasMapping) !== false) {
throw new \blaze\lang\Exception('The alias ' . $alias . ' already exists!');
}
$aliasMapping[$alias] = $classMeta;
foreach ($classMeta->getIdentifiers() as $field) {
$val = $field->getFieldDescriptor();
if (array_search($val->getName(), $fieldsGlobal) !== false) {
throw new \blaze\lang\Exception('The attribute ' . $val->getName() . ' of ' . $classMeta->getName() . ' is already in the global scope, you need to use a alias!');
}
$fieldsGlobal[] = $val->getName();
$fields[$alias][] = $val;
}
foreach ($classMeta->getSingleFields() as $field) {
$val = $field;
if (array_search($val->getName(), $fieldsGlobal) !== false) {
throw new \blaze\lang\Exception('The attribute ' . $val->getName() . ' of ' . $classMeta->getName() . ' is already in the global scope, you need to use a alias!');
}
$fieldsGlobal[] = $val->getName();
$fields[$alias][] = $val;
}
foreach ($classMeta->getCollectionFields() as $field) {
$val = $field->getFieldDescriptor();
if (array_search($val->getName(), $fieldsGlobal) !== false) {
throw new \blaze\lang\Exception('The attribute ' . $val->getName() . ' of ' . $classMeta->getName() . ' is already in the global scope, you need to use a alias!');
}
$fieldsGlobal[] = $val->getName();
$collectionFields[$alias][] = $field;
}
}
} else {
if ($fromable instanceof \blaze\persistence\ooql\Join) {
// Not supported at the moment
} else {
if ($fromable instanceof \blaze\persistence\ooql\Subselect) {
// Not supported at the moment
}
}
}
}
if ($query instanceof \blaze\persistence\ooql\SelectStatement) {
$clause = $query->getSelectClause();
$selectables = $clause->getSelectables();
$selectFields = array();
if (count($selectables) < 1) {
throw new \blaze\lang\Exception('Nothing to select given!');
}
foreach ($selectables as $selectable) {
}
if (count($selectables) == 1) {
// Check the selectable to be able to set the return class
if ($selectables[0] instanceof \blaze\persistence\ooql\Formula) {
$rsd = new \blaze\persistence\meta\ResultSetDescriptor($selectables[0]->getReturnType());
} else {
$propNameParts = \blaze\lang\String::asWrapper($selectables[0]->getPropertyName())->split('.');
$alias = $propNameParts[count($propNameParts) - 1];
if ($selectables[0]->getPropertyAlias() !== null) {
$alias = $selectables[0]->getPropertyAlias();
}
$propPath = new \blaze\persistence\meta\PropertyPath();
// Check every field if the name is equal to the selectable
foreach ($fields as $fieldGroup) {
foreach ($fieldGroup as $field) {
if ($field instanceof \blaze\persistence\meta\SingleFieldDescriptor) {
if ($field->getName()->compareTo($propNameParts[0]) == 0) {
$rsd = new \blaze\persistence\meta\ResultSetDescriptor($field->getType());
break;
}
} else {
if ($field->getFieldDescriptor()->getName()->compareTo($propNameParts[0]) == 0) {
// Collection
//$rsd = new \blaze\persistence\meta\ResultSetDescriptor($field->getType());
break;
}
}
}
if ($rsd !== null) {
break;
}
}
}
} else {
// Return class is an Object[]
$rsd = new \blaze\persistence\meta\ResultSetDescriptor('blaze\\lang\\Object', true);
}
} else {
if (count($fromables) > 1) {
throw new \blaze\lang\Exception('You need to specify what to select!');
} else {
// Assume that the only object in fromables has to be selected
$classDesc = $aliasMapping[\blaze\lang\String::asNative($fromables[0]->getAlias())];
$rsd = new \blaze\persistence\meta\ResultSetDescriptor($classDesc->getFullName());
foreach ($fields[\blaze\lang\String::asNative($fromables[0]->getAlias())] as $field) {
$rsd->addFieldMapping($field);
}
foreach ($collectionFields[\blaze\lang\String::asNative($fromables[0]->getAlias())] as $field) {
$rsd->addCollectionMapping($field);
}
}
}
}
return $rsd;
}
