protected Expression processPropertyTracedownTooneOptimized(
Attribute<?, ?> attr, Expression builder, List<Parameter> parameters) {
ConditionQuery subQuery = getTraceDownQuery();
Expression finalExp = null;
for (PropertyCondition subPc : subQuery.getConditions()) {
if (subPc.isReturnSimpleExpression()) {
Expression subExp = subPc.processProperty(builder.get(getProp()), parameters);
if (finalExp == null) {
finalExp = subExp;
} else {
finalExp = finalExp.and(subExp);
}
} else {
// low-performance query since an extra layer of exists added
// but this is the only way to make it work.
// this situation is rare. So we may do not need to optimize it
Expression subBuilder = new ExpressionBuilder();
Expression subExp = subPc.processProperty(subBuilder, parameters);
ReportQuery childQuery = formRelationReportQuery(attr, subBuilder);
childQuery.retrievePrimaryKeys();
childQuery.setSelectionCriteria(subBuilder.equal(builder.get(getProp())).and(subExp));
if (finalExp == null) {
finalExp = builder.exists(childQuery);
} else {
finalExp = finalExp.and(builder.exists(childQuery));
}
}
}
return finalExp;
}
protected boolean isComplexTracedown(Attribute<?, ?> attr) {
ConditionQuery subQuery = getTraceDownQuery();
for (PropertyCondition subPc : subQuery.getConditions()) {
if (!subPc.isReturnSimpleExpression()) {
return false;
}
}
return true;
}