程序包 org.hibernate.transform

类 DistinctRootEntityResultTransformer

java.lang.Object

org.hibernate.transform.DistinctRootEntityResultTransformer

所有已实现的接口:

Serializable, ResultTransformer, TupleSubsetResultTransformer

public class DistinctRootEntityResultTransformer
extends Object
implements TupleSubsetResultTransformer

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.

作者:

Gavin King, Steve Ebersole

另请参阅:

序列化表格

字段概要

字段

修饰符和类型	字段	说明
static DistinctRootEntityResultTransformer	INSTANCE

方法概要

修饰符和类型	方法	说明
boolean[]	includeInTransform(String[] aliases, int tupleLength)	Returns an array with the i-th element indicating whether the i-th element of the tuple is included in the transformed value.
boolean	isTransformedValueATupleElement(String[] aliases, int tupleLength)	When a tuple is transformed, is the result a single element of the tuple?
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[]).

从类继承的方法 java.lang.Object

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

字段详细资料

INSTANCE

public static final DistinctRootEntityResultTransformer INSTANCE

方法详细资料

transformTuple

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

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

指定者:

transformTuple 在接口中 ResultTransformer

参数:

tuple - The tuple to transform

aliases - The tuple aliases

返回:

The transformed tuple row.

transformList

public List transformList(List list)

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

指定者:

transformList 在接口中 ResultTransformer

参数:

list - The list to transform.

返回:

The transformed List.

includeInTransform

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

从接口复制的说明: TupleSubsetResultTransformer

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

指定者:

includeInTransform 在接口中 TupleSubsetResultTransformer

参数:

aliases - - the aliases that correspond to the tuple

tupleLength - - the number of elements in the tuple

返回:

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

isTransformedValueATupleElement

public boolean isTransformedValueATupleElement(String[] aliases,
                                               int tupleLength)

从接口复制的说明: TupleSubsetResultTransformer

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

指定者:

isTransformedValueATupleElement 在接口中 TupleSubsetResultTransformer

参数:

aliases - - the aliases that correspond to the tuple

tupleLength - - the number of elements in the tuple

返回:

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