public Object evaluate(Evaluator evaluator) {
final Member[] members = tupleCalc.evaluateTuple(evaluator);
if (members == null) {
return null;
}
final boolean needToReturnNull = evaluator.needToReturnNullForUnrelatedDimension(members);
if (needToReturnNull) {
return null;
}
Member[] savedMembers = new Member[members.length];
for (int i = 0; i < members.length; i++) {
savedMembers[i] = evaluator.setContext(members[i]);
}
Object result = evaluator.evaluateCurrent();
evaluator.setContext(savedMembers);
return result;
}
public boolean dependsOn(Hierarchy hierarchy) {
if (super.dependsOn(hierarchy)) {
return true;
}
for (Type type : ((TupleType) tupleCalc.getType()).elementTypes) {
// If the expression definitely includes the dimension (in this
// case, that means it is a member of that dimension) then we
// do not depend on the dimension. For example, the scalar value of
// ([Store].[USA], [Gender].[F])
// does not depend on [Store].
//
// If the dimensionality of the expression is unknown, then the
// expression MIGHT include the dimension, so to be safe we have to
// say that it depends on the given dimension. For example,
// (Dimensions(3).CurrentMember.Parent, [Gender].[F])
// may depend on [Store].
if (type.usesHierarchy(hierarchy, true)) {
return false;
}
}
return true;
}
