private void toOlap4j(
UnionBuilder expression,
Node current,
ParseTreeNode partialExpression,
int level,
List<QueryHierarchy> dimensions,
List<HierarchyExpander> expanders) {
HierarchyExpander expander = expanders.get(level);
expander.setDrills(current.drills);
QueryHierarchy h = dimensions.get(level);
// Creates a list of children to be processed
List<Member> childrenMembers = new ArrayList<Member>();
if (current.hasChildren()) {
for (Node child : current.children) {
if (!h.isIncluded(child.getMember())) continue;
Member p = h.getParentMember(child.getMember());
while (p != null && expander.isDrilled(p)) {
p = h.getParentMember(p);
}
if (p == null) childrenMembers.add(child.getMember());
}
}
// Generates the join of this query hierarchy, appling the drills and removing
// any member involved in a larger drill position.
CrossJoinBuilder xJoin = new CrossJoinBuilder();
xJoin.join(partialExpression);
xJoin.join(Mdx.except(h.toOlap4j(expander), UnionBuilder.fromMembers(childrenMembers)));
for (int n = level + 1; n < dimensions.size(); ++n) {
HierarchyExpander nextExp = expanders.get(n);
nextExp.setDrills(null);
QueryHierarchy nh = dimensions.get(n);
xJoin.join(nh.toOlap4j(nextExp));
}
expression.add(xJoin.getJoinNode());
// Recursively generates expression for larger drill positions.
for (Member child : childrenMembers) {
CrossJoinBuilder x = new CrossJoinBuilder();
x.join(partialExpression);
x.join(Mdx.member(child));
toOlap4j(
expression, current.getChild(child), x.getJoinNode(), level + 1, dimensions, expanders);
}
}
public ParseTreeNode toOlap4j(
List<QueryHierarchy> dimensions, List<HierarchyExpander> expanders) {
UnionBuilder expression = new UnionBuilder();
toOlap4j(expression, root, null, 0, dimensions, expanders);
return expression.getUnionNode();
}