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/*
* 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.loader.plan.build.internal.returns;
import org.hibernate.engine.FetchStrategy;
import org.hibernate.loader.plan.build.spi.ExpandingEntityQuerySpace;
import org.hibernate.loader.plan.build.spi.ExpandingFetchSource;
import org.hibernate.loader.plan.spi.EntityFetch;
import org.hibernate.loader.plan.spi.FetchSource;
import org.hibernate.persister.walking.spi.AssociationAttributeDefinition;
import org.hibernate.persister.walking.spi.AttributeDefinition;
import org.hibernate.type.EntityType;
/**
* @author Steve Ebersole
*/
public class EntityAttributeFetchImpl extends AbstractEntityReference implements EntityFetch {
private final FetchSource fetchSource;
private final AttributeDefinition fetchedAttribute;
private final FetchStrategy fetchStrategy;
public EntityAttributeFetchImpl(
ExpandingFetchSource fetchSource,
AssociationAttributeDefinition fetchedAttribute,
FetchStrategy fetchStrategy,
ExpandingEntityQuerySpace entityQuerySpace) {
super(
entityQuerySpace,
fetchSource.getPropertyPath().append( fetchedAttribute.getName() )
);
this.fetchSource = fetchSource;
this.fetchedAttribute = fetchedAttribute;
this.fetchStrategy = fetchStrategy;
}
@Override
public FetchSource getSource() {
return fetchSource;
}
@Override
public FetchStrategy getFetchStrategy() {
return fetchStrategy;
}
@Override
public EntityType getFetchedType() {
return (EntityType) fetchedAttribute.getType();
}
@Override
public boolean isNullable() {
return fetchedAttribute.isNullable();
}
@Override
public String getAdditionalJoinConditions() {
return null;
}
@Override
public String[] toSqlSelectFragments(String alias) {
return new String[0]; //To change body of implemented methods use File | Settings | File Templates.
}
@Override
public void validateFetchPlan(FetchStrategy fetchStrategy, AttributeDefinition attributeDefinition) {
// todo : allow bi-directional key-many-to-one fetches?
// those do cause problems in Loader; question is whether those are indicative of that situation or
// of Loaders ability to handle it.
}
@Override
public AttributeDefinition getFetchedAttributeDefinition() {
return fetchedAttribute;
}
}