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;
}
protected Expression processPropertyTracedownToManyNone(
Attribute<?, ?> attr, Expression builder, List<Parameter> parameters) {
ConditionQuery subQuery = getTraceDownQuery();
// subQuery.setPrefix(getQuery().getPrefix()+parameters.size()+"_");
Expression subBuilder = new ExpressionBuilder();
List<Expression> childExps = new ArrayList<Expression>(3);
for (PropertyCondition subPc : subQuery.getConditions()) {
Expression subExp = subPc.processProperty(subBuilder, parameters);
childExps.add(subExp);
}
if (childExps.isEmpty()) {
throw new InvalidQueryException("No expression from subquery.");
}
Expression finalExp = childExps.get(0);
for (int i = 1; i < childExps.size(); i++) {
finalExp = finalExp.and(childExps.get(i));
}
return builder.noneOf(getProp(), finalExp);
}
protected Expression processPropertyTracedownToManySomeOptimized(
Attribute<?, ?> attr, Expression builder, List<Parameter> parameters) {
ConditionQuery subQuery = getTraceDownQuery();
// subQuery.setPrefix(getQuery().getPrefix()+parameters.size()+"_");
Expression prefixExp = builder.anyOf(getProp());
List<Expression> complexExps = new ArrayList<Expression>();
for (PropertyCondition subPc : subQuery.getConditions()) {
Expression subExp = subPc.processProperty(prefixExp, parameters);
complexExps.add(subExp);
}
Expression finalExp = null;
if (complexExps.isEmpty()) {
throw new InvalidQueryException("No expression from subquery.");
}
finalExp = complexExps.get(0);
for (int i = 1; i < complexExps.size(); i++) {
finalExp = finalExp.and(complexExps.get(i));
}
return finalExp;
}