/**
* 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));
}
}
@Override
public Object executeIndexQuery(
OCommandContext iContext,
OIndex<?> index,
final INDEX_OPERATION_TYPE iOperationType,
List<Object> keyParams,
int fetchLimit) {
final OIndexDefinition indexDefinition = index.getDefinition();
final OIndexInternal<?> internalIndex = index.getInternal();
if (!internalIndex.canBeUsedInEqualityOperators()) return null;
final Object result;
if (indexDefinition.getParamCount() == 1) {
final Object key;
if (indexDefinition instanceof OIndexDefinitionMultiValue)
key = ((OIndexDefinitionMultiValue) indexDefinition).createSingleValue(keyParams.get(0));
else key = indexDefinition.createValue(keyParams);
if (key == null) return null;
final Object indexResult;
if (iOperationType == INDEX_OPERATION_TYPE.GET) indexResult = index.get(key);
else indexResult = index.count(key);
result = convertIndexResult(indexResult);
} else {
// in case of composite keys several items can be returned in case of we perform search
// using part of composite key stored in index.
final OCompositeIndexDefinition compositeIndexDefinition =
(OCompositeIndexDefinition) indexDefinition;
final Object keyOne = compositeIndexDefinition.createSingleValue(keyParams);
if (keyOne == null) return null;
final Object keyTwo = compositeIndexDefinition.createSingleValue(keyParams);
if (internalIndex.hasRangeQuerySupport()) {
if (INDEX_OPERATION_TYPE.COUNT.equals(iOperationType)) {
result = index.count(keyOne, true, keyTwo, true, fetchLimit);
} else if (fetchLimit > -1)
result = index.getValuesBetween(keyOne, true, keyTwo, true, fetchLimit);
else result = index.getValuesBetween(keyOne, true, keyTwo, true);
} else {
if (indexDefinition.getParamCount() == keyParams.size()) {
final Object indexResult;
if (iOperationType == INDEX_OPERATION_TYPE.GET) indexResult = index.get(keyOne);
else indexResult = index.count(keyOne);
result = convertIndexResult(indexResult);
} else return null;
}
}
updateProfiler(iContext, index, keyParams, indexDefinition);
return result;
}