com.querydsl.jpa

Interface QueryHandler

All Known Implementing Classes:

DefaultQueryHandler

public interface QueryHandler

QueryHandler provides injection of provider specific functionality into the query logic

Author:

tiwe

Method Summary

Modifier and Type	Method and Description
void	addEntity(javax.persistence.Query query, String alias, Class<?> type) Add the given entity to the given native query
void	addScalar(javax.persistence.Query query, String alias, Class<?> type) Add the given scalar to the given native query
boolean	createNativeQueryTyped() Return whether native queries should be created as typed queries
<T> com.mysema.commons.lang.CloseableIterator<T>	iterate(javax.persistence.Query query, FactoryExpression<?> projection) Iterate the results with the optional projection
boolean	transform(javax.persistence.Query query, FactoryExpression<?> projection) Transform the results of the given query using the given factory expression
boolean	wrapEntityProjections() Return whether entity projections need to be wrapped

Method Detail

createNativeQueryTyped

boolean createNativeQueryTyped()

Return whether native queries should be created as typed queries

Returns:

whether native queries should be created as typed queries

iterate

<T> com.mysema.commons.lang.CloseableIterator<T> iterate(javax.persistence.Query query,
                                                         @Nullable
                                                         FactoryExpression<?> projection)

Iterate the results with the optional projection

Parameters:

query - query

Returns:

iterator

addScalar

void addScalar(javax.persistence.Query query,
               String alias,
               Class<?> type)

Add the given scalar to the given native query

Parameters:

query - query

alias - alias

type - type

addEntity

void addEntity(javax.persistence.Query query,
               String alias,
               Class<?> type)

Add the given entity to the given native query

Parameters:

query - query

alias - alias

type - type

transform

boolean transform(javax.persistence.Query query,
                  FactoryExpression<?> projection)

Transform the results of the given query using the given factory expression

Parameters:

query - query

projection - projection

Returns:

true, if query as been modified

wrapEntityProjections

boolean wrapEntityProjections()

Return whether entity projections need to be wrapped

Returns:

whether entity projections need to be wrapped