Package nl.datasteel.crudcraft.projection.impl.jpa

Class JpaProjectionExecutorProvider

java.lang.Object

nl.datasteel.crudcraft.projection.impl.jpa.JpaProjectionExecutorProvider

All Implemented Interfaces:

ProjectionExecutorProvider

public class JpaProjectionExecutorProvider
extends Object
implements ProjectionExecutorProvider

Provider for the JPA based ProjectionExecutor.

Constructor Summary

Constructors

Constructor	Description
JpaProjectionExecutorProvider(jakarta.persistence.EntityManager entityManager, CriteriaProjectionBuilder criteriaBuilder, ProjectionMetadataRegistry registry)	Constructs a new JpaProjectionExecutorProvider with the given parameters.

Method Summary

Modifier and Type	Method	Description
ProjectionExecutor	getExecutor()	Returns the JPA based ProjectionExecutor.
boolean	supports(ProjectionQuery<?> query)	Checks if the given ProjectionQuery can be handled by this provider.

Methods inherited from class java.lang.Object

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

Constructor Details

JpaProjectionExecutorProvider

public JpaProjectionExecutorProvider(jakarta.persistence.EntityManager entityManager,
 CriteriaProjectionBuilder criteriaBuilder,
 ProjectionMetadataRegistry registry)

Constructs a new JpaProjectionExecutorProvider with the given parameters.

Parameters:

entityManager - the EntityManager to use for executing queries

criteriaBuilder - the CriteriaProjectionBuilder to build projection expressions

registry - the ProjectionMetadataRegistry to access compile-time generated metadata

Method Details

supports

public boolean supports(ProjectionQuery<?> query)

Checks if the given ProjectionQuery can be handled by this provider. It checks if the query is null or if it has no predicate available.

Specified by:

supports in interface ProjectionExecutorProvider

Parameters:

query - the projection query to check

Returns:

true if the query can be handled, false otherwise

getExecutor

public ProjectionExecutor getExecutor()

Returns the JPA based ProjectionExecutor.

Specified by:

getExecutor in interface ProjectionExecutorProvider

Returns:

the executor