org.hibernate.transform
Class DistinctRootEntityResultTransformer

java.lang.Object
  org.hibernate.transform.DistinctRootEntityResultTransformer

All Implemented Interfaces:

Serializable, ResultTransformer

public class DistinctRootEntityResultTransformer
extends Object
implements ResultTransformer, Serializable

Much like RootEntityResultTransformer, but we also distinct the entity in the final result.

Since this transformer is stateless, all instances would be considered equal. So for optimization purposes we limit it to a single, singleton instance (this is not quite true yet: see deprecation notice on constructor).

Author:

Gavin King, Steve Ebersole

See Also:

Serialized Form

Field Summary

static DistinctRootEntityResultTransformer

INSTANCE

Constructor Summary

DistinctRootEntityResultTransformer()
Deprecated. Use the INSTANCE reference instead of explicitly creating a new one (to be removed in 3.4).

Method Summary

boolean	equals(Object other)
int	hashCode()
List	transformList(List list) Simply delegates to DistinctResultTransformer.transformList(java.util.List).
Object	transformTuple(Object[] tuple, String[] aliases) Simply delegates to RootEntityResultTransformer.transformTuple(java.lang.Object[], java.lang.String[]).

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

INSTANCE

public static final DistinctRootEntityResultTransformer INSTANCE

Constructor Detail

DistinctRootEntityResultTransformer

public DistinctRootEntityResultTransformer()

Deprecated. Use the INSTANCE reference instead of explicitly creating a new one (to be removed in 3.4).

Instantiate a DistinctRootEntityResultTransformer.

todo : make private, see deprecation notice

Method Detail

transformTuple

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

Simply delegates to RootEntityResultTransformer.transformTuple(java.lang.Object[], java.lang.String[]).

Specified by:

transformTuple in interface ResultTransformer

Parameters:

tuple - The tuple to transform

aliases - The tuple aliases

Returns:

The transformed tuple row.

transformList

public List transformList(List list)

Simply delegates to DistinctResultTransformer.transformList(java.util.List).

Specified by:

transformList in interface ResultTransformer

Parameters:

list - The list to transform.

Returns:

The transformed List.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object other)

Overrides:

equals in class Object