public boolean isInstance(Object obj) {
if (obj instanceof Values) {
Values vals = (Values) obj;
int pos = vals.startPos();
int n = 0;
if (base instanceof ItemPredicate) {
ItemPredicate pred = (ItemPredicate) base;
for (; ; ) {
boolean matches;
matches = pred.isInstancePos(vals, pos);
pos = vals.nextPos(pos);
if (pos == 0) {
return n >= minOccurs && (maxOccurs < 0 || n <= maxOccurs);
}
if (!matches) return false;
n++;
}
} else {
for (; ; ) {
pos = vals.nextPos(pos);
if (pos == 0) {
return n >= minOccurs && (maxOccurs < 0 || n <= maxOccurs);
}
Object value = vals.getPosPrevious(pos);
if (!base.isInstance(value)) return false;
n++;
}
}
} else {
if (minOccurs > 1 || maxOccurs == 0) return false;
return base.isInstance(obj);
}
}
