/**
* Calculate which fields have no values across the whole range of titles. Iterates through all
* the titles for each field value, until an entry is found or the end of the title list is
* reached.
*
* @return a set of fields which are empty
*/
private EnumSet<Field> findEmptyFields() {
long s = System.currentTimeMillis();
EnumSet<Field> empty = EnumSet.allOf(Field.class);
for (Field f : Field.getFieldSet()) {
// Check if any title has a value for this field
for (KbartTitle kbt : titles) {
if (kbt.hasFieldValue(f)) {
empty.remove(f);
break;
}
}
}
// Log the time, as this is an expensive way to monitor empty fields.
// It should be done somehow during title conversion.
log.debug("findEmptyFields() took " + (System.currentTimeMillis() - s) + "s");
return empty;
}
