Top Description Fields Constructors Methods
org.hibernate.transform

public Class DistinctRootEntityResultTransformer

extends Object
implements TupleSubsetResultTransformer
Class Inheritance
All Implemented Interfaces
org.hibernate.transform.TupleSubsetResultTransformer, org.hibernate.transform.ResultTransformer, java.io.Serializable
Imports
java.util.List
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.

Authors
Gavin King, Steve Ebersole

Field Summary

Modifier and TypeField and Description
public static final DistinctRootEntityResultTransformer
INSTANCE

Constructor Summary

AccessConstructor and Description
private
DistinctRootEntityResultTransformer()

Disallow instantiation of DistinctRootEntityResultTransformer.

Method Summary

Modifier and TypeMethod and Description
public boolean[]
includeInTransform(String[]
- the aliases that correspond to the tuple
aliases, int
- the number of elements in the tuple
tupleLength)

Implements org.hibernate.transform.TupleSubsetResultTransformer.includeInTransform.

Returns an array with the i-th element indicating whether the i-th element of the tuple is included in the transformed value.
public boolean
isTransformedValueATupleElement(String[]
- the aliases that correspond to the tuple
aliases, int
- the number of elements in the tuple
tupleLength)

Implements org.hibernate.transform.TupleSubsetResultTransformer.isTransformedValueATupleElement.

When a tuple is transformed, is the result a single element of the tuple?
private Object

Returns:

The singleton instance : INSTANCE
readResolve()

Serialization hook for ensuring singleton uniqueing.

public List<E>

Returns:

The transformed List.
transformList(List<E>
The list to transform.
list)

Implements org.hibernate.transform.ResultTransformer.transformList.

Simply delegates to DistinctResultTransformer#transformList.
public Object

Returns:

The transformed tuple row.
transformTuple(Object[]
The tuple to transform
tuple, String[]
The tuple aliases
aliases)

Implements org.hibernate.transform.ResultTransformer.transformTuple.

Simply delegates to RootEntityResultTransformer#transformTuple.
Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

INSTANCEback to summary
public static final DistinctRootEntityResultTransformer INSTANCE

Constructor Detail

DistinctRootEntityResultTransformerback to summary
private DistinctRootEntityResultTransformer()

Disallow instantiation of DistinctRootEntityResultTransformer.

Method Detail

includeInTransformback to summary
public boolean[] includeInTransform(String[] aliases, int tupleLength)

Implements org.hibernate.transform.TupleSubsetResultTransformer.includeInTransform.

Doc from org.hibernate.transform.TupleSubsetResultTransformer.includeInTransform.

Returns an array with the i-th element indicating whether the i-th element of the tuple is included in the transformed value.

Parameters
aliases:String[]

- the aliases that correspond to the tuple

tupleLength:int

- the number of elements in the tuple

Returns:boolean[]

array with the i-th element indicating whether the i-th element of the tuple is included in the transformed value.

Annotations
@Override
isTransformedValueATupleElementback to summary
public boolean isTransformedValueATupleElement(String[] aliases, int tupleLength)

Implements org.hibernate.transform.TupleSubsetResultTransformer.isTransformedValueATupleElement.

Doc from org.hibernate.transform.TupleSubsetResultTransformer.isTransformedValueATupleElement.

When a tuple is transformed, is the result a single element of the tuple?

Parameters
aliases:String[]

- the aliases that correspond to the tuple

tupleLength:int

- the number of elements in the tuple

Returns:boolean

true, if the transformed value is a single element of the tuple; false, otherwise.

Annotations
@Override
readResolveback to summary
private Object readResolve()

Serialization hook for ensuring singleton uniqueing.

Returns:Object

The singleton instance : INSTANCE

transformListback to summary
public List<E> transformList(List<E> list)

Implements org.hibernate.transform.ResultTransformer.transformList.

Simply delegates to DistinctResultTransformer#transformList.

Parameters
list:List<E>

The list to transform.

Returns:List<E>

The transformed List.

Annotations
@Override
transformTupleback to summary
public Object transformTuple(Object[] tuple, String[] aliases)

Implements org.hibernate.transform.ResultTransformer.transformTuple.

Simply delegates to RootEntityResultTransformer#transformTuple.

Parameters
tuple:Object[]

The tuple to transform

aliases:String[]

The tuple aliases

Returns:Object

The transformed tuple row.

Annotations
@Override