org.hibernate.transform

Interface ResultTransformer

All Superinterfaces:

Serializable

All Known Subinterfaces:

TupleSubsetResultTransformer

All Known Implementing Classes:

AbstractEntityManagerImpl.TupleBuilderTransformer, AliasedTupleSubsetResultTransformer, AliasToBeanConstructorResultTransformer, AliasToBeanResultTransformer, AliasToEntityMapResultTransformer, BasicTransformerAdapter, CacheableResultTransformer, DistinctResultTransformer, DistinctRootEntityResultTransformer, PassThroughResultTransformer, RootEntityResultTransformer, ToListResultTransformer

public interface ResultTransformer
extends Serializable

Implementors define a strategy for transforming query results into the actual application-visible query result list.

Author:

Gavin King

See Also:

Criteria.setResultTransformer(ResultTransformer), Query.setResultTransformer(ResultTransformer)

Method Summary

Modifier and Type	Method and Description
List	transformList(List collection) Here we have an opportunity to perform transformation on the query result as a whole.
Object	transformTuple(Object[] tuple, String[] aliases) Tuples are the elements making up each "row" of the query result.

Method Detail

transformTuple

Object transformTuple(Object[] tuple,
                      String[] aliases)

Tuples are the elements making up each "row" of the query result. The contract here is to transform these elements into the final row.

Parameters:

tuple - The result elements

aliases - The result aliases ("parallel" array to tuple)

Returns:

The transformed row.

transformList

List transformList(List collection)

Here we have an opportunity to perform transformation on the query result as a whole. This might be useful to convert from one collection type to another or to remove duplicates from the result, etc.

Parameters:

collection - The result.

Returns:

The transformed result.