icegem-core/src/main/java/com/googlecode/icegem/query/bucketoriented/BucketOrientedQueryService.java
@SuppressWarnings({ "unchecked" })
    public static SelectResults<Object> executeOnBuckets(String queryString, Object[] queryParameters, Region region,
	    Set<Object> keys) throws QueryException {
	if ((queryString == null) || (queryString.length() == 0)) {
	    throw new QueryException("You must specify query string for execution.");
	}

	int limit = extractLimit(queryString);

	BucketOrientedQueryFunctionArgument functionArgument = new BucketOrientedQueryFunctionArgument(queryString,
		queryParameters);

	BucketOrientedQueryFunction function = new BucketOrientedQueryFunction();

	FunctionService.registerFunction(function);

	List<List<Object>> queryResults;

	try {
	    queryResults = (List<List<Object>>) FunctionService.onRegion(region).withFilter(keys)
		    .withArgs(functionArgument).execute(function).getResult();
	} catch (FunctionException e) {
	    logger.error("Failed to execute bucket oriented query function: " + function, e);

	    throw new QueryException(e.getMessage());
	}
	
	return formatSelectResults(queryResults, limit);
    }
@SuppressWarnings({ "unchecked" })
    public static SelectResults<Object> executeOnBuckets(String queryString, Object[] queryParameters, Region region,
	    Set<Object> keys) throws QueryException {
	if ((queryString == null) || (queryString.length() == 0)) {
	    throw new QueryException("You must specify query string for execution.");
	}

	int limit = extractLimit(queryString);

	BucketOrientedQueryFunctionArgument functionArgument = new BucketOrientedQueryFunctionArgument(queryString,
		queryParameters);

	BucketOrientedQueryFunction function = new BucketOrientedQueryFunction();

	FunctionService.registerFunction(function);

	List<List<Object>> queryResults;

	try {
	    queryResults = (List<List<Object>>) FunctionService.onRegion(region).withFilter(keys)
		    .withArgs(functionArgument).execute(function).getResult();
	} catch (FunctionException e) {
	    logger.error("Failed to execute bucket oriented query function: " + function, e);

	    throw new QueryException(e.getMessage());
	}
	
	return formatSelectResults(queryResults, limit);
    }
@ SuppressWarnings ( { "unchecked" } ) public static SelectResults < Object > executeOnBuckets ( String queryString , Object [ ] queryParameters , Region region , Set < Object > keys ) throws QueryException { if ( ( queryString == null ) || ( queryString . length ( ) == 0 ) ) { throw new QueryException ( "You must specify query string for execution." ) ; } int limit = extractLimit ( queryString ) ; BucketOrientedQueryFunctionArgument functionArgument = new BucketOrientedQueryFunctionArgument ( queryString , queryParameters ) ; BucketOrientedQueryFunction function = new BucketOrientedQueryFunction ( ) ; FunctionService . registerFunction ( function ) ; List < List < Object > > queryResults ; try { queryResults = ( List < List < Object > > ) FunctionService . onRegion ( region ) . withFilter ( keys ) . withArgs ( functionArgument ) . execute ( function ) . getResult ( ) ; } catch ( FunctionException e ) { logger . error ( "Failed to execute bucket oriented query function: " + function , e ) ; throw new QueryException ( e . getMessage ( ) ) ; } return formatSelectResults ( queryResults , limit ) ; }
Executes a particular query with parameters on specified region using a set of keys that represents buckets. The
set of buckets is determined by keys of entries that are stored in such buckets: - real and fake keys can be used
(such key should have the same routing object as bucket's keys have); - it will be enough to specify one key for
each bucket. Work of this method is based on execution of function.

@see BucketOrientedQueryFunction
@param queryString OQL query string.
@param queryParameters Query parameters.
@param region Partitioned region on which query will be executed.
@param keys Set of keys that specify buckets.
@return Query results as instance of {@link SelectResults}.
@throws QueryException When in case of query execution failure.
Executes a particular query with parameters on specified region using a set of keys that represents buckets . The set of buckets is determined by keys of entries that are stored in such buckets : - real and fake keys can be used ( such key should have the same routing object as bucket s keys have ) ; - it will be enough to specify one key for each bucket . Work of this method is based on execution of function .