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ToOneEntityLoader.java
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ToOneEntityLoader.java
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package org.hibernate.envers.entities.mapper.relation;
import java.io.Serializable;
import org.hibernate.envers.configuration.AuditConfiguration;
import org.hibernate.envers.entities.mapper.relation.lazy.ToOneDelegateSessionImplementor;
import org.hibernate.envers.reader.AuditReaderImplementor;
import org.hibernate.persister.entity.EntityPersister;
/**
* @author Lukasz Antoniak (lukasz dot antoniak at gmail dot com)
*/
public class ToOneEntityLoader {
/**
* Immediately loads historical entity or its current state when excluded from audit process.
*/
public static Object loadImmediate(AuditReaderImplementor versionsReader, Class<?> entityClass, String entityName,
Object entityId, Number revision, AuditConfiguration verCfg) {
if ( verCfg.getEntCfg().getNotVersionEntityConfiguration( entityName ) == null ) {
// Audited relation, look up entity with Envers.
return versionsReader.find( entityClass, entityName, entityId, revision );
}
else {
// Not audited relation, look up entity with Hibernate.
return versionsReader.getSessionImplementor().immediateLoad( entityName, (Serializable) entityId );
}
}
/**
* Creates proxy of referenced *-to-one entity.
*/
public static Object createProxy(AuditReaderImplementor versionsReader, Class<?> entityClass, String entityName,
Object entityId, Number revision, AuditConfiguration verCfg) {
EntityPersister persister = versionsReader.getSessionImplementor().getFactory().getEntityPersister( entityName );
return persister.createProxy(
(Serializable) entityId,
new ToOneDelegateSessionImplementor( versionsReader, entityClass, entityId, revision, verCfg )
);
}
/**
* Creates Hibernate proxy or retrieves the complete object of an entity if proxy is not
* allowed (e.g. @Proxy(lazy=false), final class).
*/
public static Object createProxyOrLoadImmediate(AuditReaderImplementor versionsReader, Class<?> entityClass, String entityName,
Object entityId, Number revision, AuditConfiguration verCfg) {
EntityPersister persister = versionsReader.getSessionImplementor().getFactory().getEntityPersister( entityName );
if ( persister.hasProxy() ) {
return createProxy( versionsReader, entityClass, entityName, entityId, revision, verCfg );
}
return loadImmediate( versionsReader, entityClass, entityName, entityId, revision, verCfg );
}
}