com.holonplatform.datastore.jpa.jpql.expression

Interface JPQLProjection<Q,R>

Type Parameters:

Q - Query result type

R - Projection result type

All Superinterfaces:

com.holonplatform.core.Expression, com.holonplatform.core.TypedExpression<R>

public interface JPQLProjection<Q,R>
extends com.holonplatform.core.TypedExpression<R>

JPQL query projection expression.

Since:

5.0.0

Nested Class Summary

Nested classes/interfaces inherited from interface com.holonplatform.core.Expression

com.holonplatform.core.Expression.ExpressionResolverFunction<E extends com.holonplatform.core.Expression,R extends com.holonplatform.core.Expression>, com.holonplatform.core.Expression.InvalidExpressionException

Method Summary

Modifier and Type	Method and Description
Optional<JPQLResultConverter<? super Q,R>>	getConverter() Get the query result converter.
Class<? extends Q>	getQueryResultType() Get the query result type.
List<String>	getSelection() Get the query selections.
Optional<String>	getSelectionAlias(String selection) Get the alias for given selection expression, if defined.

Methods inherited from interface com.holonplatform.core.TypedExpression

getTemporalType, getType, isCollectionExpression, isConverterExpression

Methods inherited from interface com.holonplatform.core.Expression

validate

Method Detail

getSelection

List<String> getSelection()

Get the query selections.

Returns:

Query selection

getSelectionAlias

Optional<String> getSelectionAlias(String selection)

Get the alias for given selection expression, if defined.

Parameters:

selection - Selection expression

Returns:

Optional selection alias

getQueryResultType

Class<? extends Q> getQueryResultType()

Get the query result type.

Returns:

The query result type

getConverter

Optional<JPQLResultConverter<? super Q,R>> getConverter()

Get the query result converter.

Returns:

Query result converter, if available