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;
}
