private FromElement evaluateFromElementPath(String path, String classAlias)
throws SemanticException {
ASTFactory factory = fromClause.getASTFactory();
FromReferenceNode pathNode = (FromReferenceNode) PathHelper.parsePath(path, factory);
pathNode.recursiveResolve(
FromReferenceNode.ROOT_LEVEL, // This is the root level node.
false, // Generate an explicit from clause at the root.
classAlias,
null);
if (pathNode.getImpliedJoin() != null) {
return pathNode.getImpliedJoin();
} else {
return pathNode.getFromElement();
}
}
private void validateLhs(FromReferenceNode lhs) {
// make sure the lhs is "assignable"...
if (!lhs.isResolved()) {
throw new UnsupportedOperationException("cannot validate assignablity of unresolved node");
}
if (lhs.getDataType().isCollectionType()) {
throw new QueryException("collections not assignable in update statements");
} else if (lhs.getDataType().isComponentType()) {
throw new QueryException("Components currently not assignable in update statements");
} else if (lhs.getDataType().isEntityType()) {
// currently allowed...
}
// TODO : why aren't these the same?
if (lhs.getImpliedJoin() != null || lhs.getFromElement().isImplied()) {
throw new QueryException("Implied join paths are not assignable in update statements");
}
}
