io.jmix.eclipselink.impl

Class EclipselinkReferenceIdProvider

java.lang.Object

io.jmix.eclipselink.impl.EclipselinkReferenceIdProvider

All Implemented Interfaces:

ReferenceIdProvider

@Component(value="eclipselink_EclipselinkReferenceIdProvider")
public class EclipselinkReferenceIdProvider
extends java.lang.Object
implements ReferenceIdProvider

Utility class to provide common functionality related to persistence.
Implemented as Spring bean to allow extension in application projects.

Nested Class Summary

Nested classes/interfaces inherited from interface io.jmix.data.ReferenceIdProvider

ReferenceIdProvider.RefId

Field Summary

Fields

Modifier and Type	Field and Description
protected javax.persistence.EntityManager	entityManager
protected io.jmix.core.EntityStates	entityStates
protected io.jmix.core.Metadata	metadata
protected io.jmix.core.MetadataTools	metadataTools

Constructor Summary

Constructors

Constructor and Description
EclipselinkReferenceIdProvider()

Method Summary

Modifier and Type	Method and Description
ReferenceIdProvider.RefId	getReferenceId(java.lang.Object entity, java.lang.String property) Returns an ID of directly referenced entity without loading it from DB.

Methods inherited from class java.lang.Object

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

Field Detail

entityStates

@Autowired
protected io.jmix.core.EntityStates entityStates

metadata

@Autowired
protected io.jmix.core.Metadata metadata

metadataTools

@Autowired
protected io.jmix.core.MetadataTools metadataTools

entityManager

protected javax.persistence.EntityManager entityManager

Constructor Detail

EclipselinkReferenceIdProvider

public EclipselinkReferenceIdProvider()

Method Detail

getReferenceId

public ReferenceIdProvider.RefId getReferenceId(java.lang.Object entity,
                                                java.lang.String property)

Description copied from interface: ReferenceIdProvider

Returns an ID of directly referenced entity without loading it from DB.

If the fetchPlan does not contain the reference and FetchPlan.loadPartialEntities() is true, the returned ReferenceIdProvider.RefId will have ReferenceIdProvider.RefId.isLoaded() = false.

Usage example:

   ReferenceIdProvider.RefId refId = referenceIdProvider.getReferenceId(doc, "currency");
   if (refId.isLoaded()) {
       String currencyCode = (String) refId.getValue();
   }
 

Specified by:

getReferenceId in interface ReferenceIdProvider

Parameters:

entity - entity instance in managed state

property - name of reference property

Returns:

ReferenceIdProvider.RefId instance which contains the referenced entity ID