Interface Root<X>

Type Parameters:

X - the entity type referenced by the root

All Superinterfaces:

Expression<X>, FetchParent<X,X>, From<X,X>, Path<X>, Selection<X>, TupleElement<X>

public interface Root<X>
extends From<X,X>

A root type in the from clause. Query roots always reference entities.

Since:

2.0

Method Summary

Modifier and Type	Method	Description
EntityType<X>	getModel()	Return the metamodel entity corresponding to the root.
<T extends X> Root<T>	treat(Class<T> type)	Downcast the root type to the given type.

Methods inherited from interface Expression

as, cast, coalesce, coalesce, count, countDistinct, equalTo, equalTo, in, in, in, in, in, isMember, isNotMember, isNotNull, isNull, notEqualTo, notEqualTo, nullif, nullif, selectCase

Methods inherited from interface FetchParent

fetch, fetch, fetch, fetch, fetch, fetch, getFetches

Methods inherited from interface From

getCorrelationParent, getJoins, isCorrelated, join, join, join, join, join, join, join, join, join, join, join, join, join, join, join, join, joinCollection, joinCollection, joinList, joinList, joinMap, joinMap, joinSet, joinSet

Methods inherited from interface Path

get, get, get, get, get, get, get, get, get, getParentPath, type

Methods inherited from interface Selection

alias, getCompoundSelectionItems, isCompoundSelection

Methods inherited from interface TupleElement

getAlias, getJavaType

Method Details

getModel

@Nonnull
EntityType<X> getModel()

Return the metamodel entity corresponding to the root.

Specified by:

getModel in interface Path<X>

Returns:

metamodel entity corresponding to the root

treat

@Nonnull
<T extends X> Root<T> treat(@Nonnull
 Class<T> type)

Downcast the root type to the given type.

Specified by:

treat in interface From<X,X>

Specified by:

treat in interface Path<X>

Type Parameters:

T - the subtype of the root type

Parameters:

type - a subtype of the root type

Returns:

this root downcast to the given type

Since:

4.0