private List<OIdentifiable> applyTailIndexes(final Object lastIndexResult) {
final OIndex<?> beforeTheLastIndex = indexChain.get(indexChain.size() - 2);
Set<Comparable> currentKeys = prepareKeys(beforeTheLastIndex, lastIndexResult);
for (int j = indexChain.size() - 2; j > 0; j--) {
final OIndex<?> currentIndex = indexChain.get(j);
final OIndex<?> nextIndex = indexChain.get(j - 1);
final Set<Comparable> newKeys;
if (isComposite(currentIndex)) {
newKeys = new TreeSet<Comparable>();
for (Comparable currentKey : currentKeys) {
final List<OIdentifiable> currentResult = getFromCompositeIndex(currentKey, currentIndex);
newKeys.addAll(prepareKeys(nextIndex, currentResult));
}
} else {
final OIndexCursor cursor = currentIndex.iterateEntries(currentKeys, true);
final List<OIdentifiable> keys = cursorToList(cursor);
newKeys = prepareKeys(nextIndex, keys);
}
updateStatistic(currentIndex);
currentKeys = newKeys;
}
return applyFirstIndex(currentKeys);
}
private List<OIdentifiable> applyFirstIndex(Collection<Comparable> currentKeys) {
final List<OIdentifiable> result;
if (isComposite(firstIndex)) {
result = new ArrayList<OIdentifiable>();
for (Comparable key : currentKeys) {
result.addAll(getFromCompositeIndex(key, firstIndex));
}
} else {
final OIndexCursor cursor = firstIndex.iterateEntries(currentKeys, true);
result = cursorToList(cursor);
}
updateStatistic(firstIndex);
return result;
}
@Override
public OIndexCursor iterateEntries(Collection<?> keys, boolean ascSortOrder) {
final OIndexCursor internalCursor = lastIndex.iterateEntries(keys, ascSortOrder);
return new ExternalIndexCursor(internalCursor);
}