/**
* Create negation of compound predicate by using logic rules: 1. not (x || y) is (not x && not y)
* 2. not (x && y) is (not x || not y)
*/
@Override
public Predicate not() {
toggleOperator();
for (Expression expr : this.getExpressions()) {
if (Predicate.class.isInstance(expr)) {
((Predicate) expr).not();
}
}
return this;
}
@Override
public Predicate isFalse(Expression<Boolean> expression) {
if (CompoundPredicate.class.isInstance(expression)) {
final CompoundPredicate predicate = (CompoundPredicate) expression;
if (predicate.getExpressions().size() == 0) {
return new BooleanStaticAssertionPredicate(
this, predicate.getOperator() == Predicate.BooleanOperator.OR);
}
predicate.not();
return predicate;
} else if (Predicate.class.isInstance(expression)) {
final Predicate predicate = (Predicate) expression;
predicate.not();
return predicate;
}
return new BooleanAssertionPredicate(this, expression, Boolean.FALSE);
}