/**
* This method searches across multiple indexes and combines the answers. Create the business
* object and only initialize the attributes you want to actually use in the query. You can AND or
* OR all these attributes.
*
* @param criteria A business object with only attributes in the query set. Others must be null
* @param isAND TRUE if results are to be ANDed otherwise the results are ORed
* @return The list of keys for the matching entries @See TestSubstringIndex
*/
public SearchResult<RK> searchMultipleIndexes(A criteria, boolean isAND) {
try {
Set<ByteArrayKey> result = null;
// first run the individual queries for each attribute in parallel
Collection<Future<SearchResult<byte[]>>> threads =
new ArrayList<Future<SearchResult<byte[]>>>();
for (Field f : indexedFields) {
final String value = (String) f.get(criteria); // non null field means it's in the query
if (value != null) {
final Index<A, RK> index = getIndex(f.getName());
Callable<SearchResult<byte[]>> c =
new Callable<SearchResult<byte[]>>() {
public SearchResult<byte[]> call() {
SearchResult<byte[]> r = index.rawContains(value);
return r;
}
};
Future<SearchResult<byte[]>> future = utils.getExecutorService().submit(c);
threads.add(future);
}
}
// the collect the results and AND/OR them
for (Future<SearchResult<byte[]>> future : threads) {
SearchResult<byte[]> r = future.get();
if (!r.isTooManyMatches()) {
Collection<ByteArrayKey> rr = convertToKeys(r.getResults());
if (result == null) result = new HashSet<ByteArrayKey>(rr);
else if (isAND) {
// AND this index match with the current running results
LinkedList<ByteArrayKey> removeList = new LinkedList<ByteArrayKey>();
for (ByteArrayKey k : rr) {
if (!result.contains(k)) removeList.add(k);
}
for (ByteArrayKey k : result) {
if (!rr.contains(k)) removeList.add(k);
}
result.removeAll(removeList);
} else result.addAll(rr);
}
}
if (result != null) {
Map<ByteArrayKey, RK> rc =
utils.getAll(result, utils.getObjectGrid().getMap(internalKeyToRealKeyMapName));
return new SearchResult<RK>(new ArrayList<RK>(rc.values()));
} else return new SearchResult<RK>();
} catch (Exception e) {
throw new ObjectGridRuntimeException(e);
}
}
