public static Criteria applyDemorgan(Criteria input) {
if (input instanceof NotCriteria) {
NotCriteria not = (NotCriteria) input;
return not.getCriteria();
}
if (!(input instanceof CompoundCriteria)) {
return new NotCriteria(input);
}
CompoundCriteria compCrit = (CompoundCriteria) input;
int operator =
(compCrit.getOperator() == CompoundCriteria.OR)
? CompoundCriteria.AND
: CompoundCriteria.OR;
List<Criteria> criteria = new ArrayList<Criteria>(compCrit.getCriteria().size());
for (Criteria crit : compCrit.getCriteria()) {
crit = new NotCriteria(crit);
criteria.add(crit);
}
return new CompoundCriteria(operator, criteria);
}
/**
* Helper method for {@link #separateCriteriaByAnd(Criteria)} that can be called recursively to
* collect parts.
*
* @param crit Crit to break apart
* @param parts Collection to add parts to
*/
private static void separateCriteria(Criteria crit, Collection<Criteria> parts) {
if (crit instanceof CompoundCriteria) {
CompoundCriteria compCrit = (CompoundCriteria) crit;
if (compCrit.getOperator() == CompoundCriteria.AND) {
for (Criteria conjunct : compCrit.getCriteria()) {
separateCriteria(conjunct, parts);
}
} else {
parts.add(crit);
}
} else {
parts.add(crit);
}
}
public static Criteria combineCriteria(
Criteria primaryCrit, Criteria additionalCrit, boolean disjunctively) {
if (primaryCrit == null) {
return additionalCrit;
}
if (additionalCrit == null) {
return primaryCrit;
}
CompoundCriteria compCrit = new CompoundCriteria();
compCrit.setOperator((disjunctively ? CompoundCriteria.OR : CompoundCriteria.AND));
if ((primaryCrit instanceof CompoundCriteria)
&& ((CompoundCriteria) primaryCrit).getOperator()
== (disjunctively ? CompoundCriteria.OR : CompoundCriteria.AND)) {
compCrit.getCriteria().addAll(((CompoundCriteria) primaryCrit).getCriteria());
} else {
compCrit.addCriteria(primaryCrit);
}
if ((additionalCrit instanceof CompoundCriteria)
&& ((CompoundCriteria) additionalCrit).getOperator()
== (disjunctively ? CompoundCriteria.OR : CompoundCriteria.AND)) {
compCrit.getCriteria().addAll(((CompoundCriteria) additionalCrit).getCriteria());
} else {
compCrit.addCriteria(additionalCrit);
}
return compCrit;
}
