/**
* Make type conversion of keys for specific index.
*
* @param index - index for which keys prepared for.
* @param keys - which should be prepared.
* @return keys converted to necessary type.
*/
private Set<Comparable> prepareKeys(OIndex<?> index, Object keys) {
final OIndexDefinition indexDefinition = index.getDefinition();
if (keys instanceof Collection) {
final Set<Comparable> newKeys = new TreeSet<Comparable>();
for (Object o : ((Collection) keys)) {
newKeys.add((Comparable) indexDefinition.createValue(o));
}
return newKeys;
} else {
return Collections.singleton((Comparable) indexDefinition.createValue(keys));
}
}
private static Iterable<List<OIndex<?>>> getIndexesForChain(
OClass iSchemaClass, OSQLFilterItemField.FieldChain fieldChain) {
List<OIndex<?>> baseIndexes = prepareBaseIndexes(iSchemaClass, fieldChain);
if (baseIndexes == null) return Collections.emptyList();
Collection<OIndex<?>> lastIndexes = prepareLastIndexVariants(iSchemaClass, fieldChain);
Collection<List<OIndex<?>>> result = new ArrayList<List<OIndex<?>>>();
for (OIndex<?> lastIndex : lastIndexes) {
final List<OIndex<?>> indexes = new ArrayList<OIndex<?>>(fieldChain.getItemCount());
indexes.addAll(baseIndexes);
indexes.add(lastIndex);
result.add(indexes);
}
return result;
}
private OChainedIndexProxy(List<OIndex<?>> indexChain) {
this.firstIndex = (OIndex<T>) indexChain.get(0);
this.indexChain = Collections.unmodifiableList(indexChain);
lastIndex = indexChain.get(indexChain.size() - 1);
}