private void prepareForIndex(QueryTranslatorImpl q) throws QueryException {
QueryableCollection collPersister = q.getCollectionPersister(collectionRole);
if (!collPersister.hasIndex())
throw new QueryException("unindexed collection before []: " + path);
String[] indexCols = collPersister.getIndexColumnNames();
if (indexCols.length != 1) throw new QueryException("composite-index appears in []: " + path);
// String[] keyCols = collPersister.getKeyColumnNames();
JoinSequence fromJoins =
new JoinSequence(q.getFactory())
.setUseThetaStyle(useThetaStyleJoin)
.setRoot(collPersister, collectionName)
.setNext(joinSequence.copy());
if (!continuation) addJoin(collectionName, collPersister.getCollectionType());
joinSequence.addCondition(
collectionName + '.' + indexCols[0] + " = "); // TODO: get SQL rendering out of here
CollectionElement elem = new CollectionElement();
elem.elementColumns = collPersister.getElementColumnNames(collectionName);
elem.elementType = collPersister.getElementType();
elem.isOneToMany = collPersister.isOneToMany();
elem.alias = collectionName;
elem.joinSequence = joinSequence;
collectionElements.addLast(elem);
setExpectingCollectionIndex();
q.addCollection(collectionName, collectionRole);
q.addFromJoinOnly(collectionName, fromJoins);
}
private void dereferenceEntity(
String propertyName, EntityType propertyType, QueryTranslatorImpl q) throws QueryException {
// NOTE: we avoid joining to the next table if the named property is just the foreign key value
// if its "id"
boolean isIdShortcut =
EntityPersister.ENTITY_ID.equals(propertyName) && propertyType.isReferenceToPrimaryKey();
// or its the id property name
final String idPropertyName;
try {
idPropertyName = propertyType.getIdentifierOrUniqueKeyPropertyName(q.getFactory());
} catch (MappingException me) {
throw new QueryException(me);
}
boolean isNamedIdPropertyShortcut =
idPropertyName != null
&& idPropertyName.equals(propertyName)
&& propertyType.isReferenceToPrimaryKey();
if (isIdShortcut || isNamedIdPropertyShortcut) {
// special shortcut for id properties, skip the join!
// this must only occur at the _end_ of a path expression
if (componentPath.length() > 0) componentPath.append('.');
componentPath.append(propertyName);
} else {
String entityClass = propertyType.getAssociatedEntityName();
String name = q.createNameFor(entityClass);
q.addType(name, entityClass);
addJoin(name, propertyType);
if (propertyType.isOneToOne()) oneToOneOwnerName = currentName;
ownerAssociationType = propertyType;
currentName = name;
currentProperty = propertyName;
q.addPathAliasAndJoin(
path.substring(0, path.toString().lastIndexOf('.')), name, joinSequence.copy());
componentPath.setLength(0);
currentPropertyMapping = q.getEntityPersister(entityClass);
}
}