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org.hibernate.envers.internal.entities.mapper.relation.AbstractToOneMapper Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.envers.internal.entities.mapper.relation;
import java.io.Serializable;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.List;
import java.util.Map;
import org.hibernate.collection.spi.PersistentCollection;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.envers.boot.internal.EnversService;
import org.hibernate.envers.internal.entities.EntityConfiguration;
import org.hibernate.envers.internal.entities.PropertyData;
import org.hibernate.envers.internal.entities.mapper.PersistentCollectionChangeData;
import org.hibernate.envers.internal.entities.mapper.PropertyMapper;
import org.hibernate.envers.internal.reader.AuditReaderImplementor;
import org.hibernate.envers.internal.tools.ReflectionTools;
import org.hibernate.property.access.spi.Setter;
import org.hibernate.service.ServiceRegistry;
/**
* Base class for property mappers that manage to-one relation.
*
* @author Lukasz Antoniak (lukasz dot antoniak at gmail dot com)
* @author Chris Cranford
*/
public abstract class AbstractToOneMapper implements PropertyMapper {
private final ServiceRegistry serviceRegistry;
private final PropertyData propertyData;
protected AbstractToOneMapper(ServiceRegistry serviceRegistry, PropertyData propertyData) {
this.serviceRegistry = serviceRegistry;
this.propertyData = propertyData;
}
@Override
public boolean mapToMapFromEntity(
SessionImplementor session,
Map data,
Object newObj,
Object oldObj) {
return false;
}
@Override
public void mapToEntityFromMap(
EnversService enversService,
Object obj,
Map data,
Object primaryKey,
AuditReaderImplementor versionsReader,
Number revision) {
if ( obj != null ) {
nullSafeMapToEntityFromMap( enversService, obj, data, primaryKey, versionsReader, revision );
}
}
@Override
public List mapCollectionChanges(
SessionImplementor session,
String referencingPropertyName,
PersistentCollection newColl,
Serializable oldColl,
Serializable id) {
return null;
}
/**
* @param enversService The EnversService
* @param entityName Entity name.
*
* @return Entity class, name and information whether it is audited or not.
*/
protected EntityInfo getEntityInfo(EnversService enversService, String entityName) {
EntityConfiguration entCfg = enversService.getEntitiesConfigurations().get( entityName );
boolean isRelationAudited = true;
if ( entCfg == null ) {
// a relation marked as RelationTargetAuditMode.NOT_AUDITED
entCfg = enversService.getEntitiesConfigurations().getNotVersionEntityConfiguration( entityName );
isRelationAudited = false;
}
final Class entityClass = ReflectionTools.loadClass( entCfg.getEntityClassName(), enversService.getClassLoaderService() );
return new EntityInfo( entityClass, entityName, isRelationAudited );
}
protected void setPropertyValue(Object targetObject, Object value) {
AccessController.doPrivileged(
new PrivilegedAction() {
@Override
public Object run() {
final Setter setter = ReflectionTools.getSetter(
targetObject.getClass(),
propertyData,
serviceRegistry
);
setter.set( targetObject, value, null );
return null;
}
}
);
}
/**
* @return Bean property that represents the relation.
*/
protected PropertyData getPropertyData() {
return propertyData;
}
/**
* Parameter {@code obj} is never {@code null}.
*/
public abstract void nullSafeMapToEntityFromMap(
EnversService enversService,
Object obj,
Map data,
Object primaryKey,
AuditReaderImplementor versionsReader,
Number revision);
/**
* Simple descriptor of an entity.
*/
protected static class EntityInfo {
private final Class entityClass;
private final String entityName;
private final boolean audited;
public EntityInfo(Class entityClass, String entityName, boolean audited) {
this.entityClass = entityClass;
this.entityName = entityName;
this.audited = audited;
}
public Class getEntityClass() {
return entityClass;
}
public String getEntityName() {
return entityName;
}
public boolean isAudited() {
return audited;
}
}
@Override
public boolean hasPropertiesWithModifiedFlag() {
return propertyData != null && propertyData.isUsingModifiedFlag();
}
}
