public void visit(AST node) {
// todo : currently expects that the individual with expressions apply to the same sql table
// join.
// This may not be the case for joined-subclass where the property values
// might be coming from different tables in the joined hierarchy. At some
// point we should expand this to support that capability. However, that has
// some difficulties:
// 1) the biggest is how to handle ORs when the individual comparisons are
// linked to different sql joins.
// 2) here we would need to track each comparison individually, along with
// the join alias to which it applies and then pass that information
// back to the FromElement so it can pass it along to the JoinSequence
if (node instanceof DotNode) {
DotNode dotNode = (DotNode) node;
FromElement fromElement = dotNode.getFromElement();
if (referencedFromElement != null) {
if (fromElement != referencedFromElement) {
throw new HibernateException(
"with-clause referenced two different from-clause elements");
}
} else {
referencedFromElement = fromElement;
joinAlias = extractAppliedAlias(dotNode);
// todo : temporary
// needed because currently persister is the one that
// creates and renders the join fragments for inheritence
// hierarchies...
if (!joinAlias.equals(referencedFromElement.getTableAlias())) {
throw new HibernateException(
"with clause can only reference columns in the driving table");
}
}
}
}
