FromElement addFromElement() throws SemanticException {
final FromClause parentFromClause = fromClause.getParentFromClause();
if (parentFromClause != null) {
// Look up class name using the first identifier in the path.
final String pathAlias = PathHelper.getAlias(path);
final FromElement parentFromElement = parentFromClause.getFromElement(pathAlias);
if (parentFromElement != null) {
return createFromElementInSubselect(path, pathAlias, parentFromElement, classAlias);
}
}
final EntityPersister entityPersister =
fromClause.getSessionFactoryHelper().requireClassPersister(path);
final FromElement elem =
createAndAddFromElement(
path,
classAlias,
entityPersister,
(EntityType) ((Queryable) entityPersister).getType(),
null);
// Add to the query spaces.
fromClause.getWalker().addQuerySpaces(entityPersister.getQuerySpaces());
return elem;
}
private FromElement evaluateFromElementPath(String path, String classAlias)
throws SemanticException {
ASTFactory factory = fromClause.getASTFactory();
FromReferenceNode pathNode = (FromReferenceNode) PathHelper.parsePath(path, factory);
pathNode.recursiveResolve(
// This is the root level node.
FromReferenceNode.ROOT_LEVEL,
// Generate an explicit from clause at the root.
false,
classAlias,
null);
if (pathNode.getImpliedJoin() != null) {
return pathNode.getImpliedJoin();
}
return pathNode.getFromElement();
}