org.hibernate.transform

Interface ResultTransformer

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

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

public interface ResultTransformer
extends java.io.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

Methods

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

Method Detail

transformTuple

java.lang.Object transformTuple(java.lang.Object[] tuple,
                              java.lang.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

java.util.List transformList(java.util.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.