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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.PropertyPath;
import org.hibernate.loader.plan.build.spi.ExpandingCompositeQuerySpace;
import org.hibernate.loader.plan.spi.CollectionAttributeFetch;
import org.hibernate.loader.plan.spi.CompositeAttributeFetch;
import org.hibernate.persister.walking.spi.AssociationAttributeDefinition;
import org.hibernate.persister.walking.spi.AttributeDefinition;
import org.hibernate.persister.walking.spi.WalkingException;
/**
* @author Steve Ebersole
* @author Gail Badner
*/
public abstract class AbstractCompositeReference extends AbstractExpandingFetchSource {
private final boolean allowCollectionFetches;
protected AbstractCompositeReference(
ExpandingCompositeQuerySpace compositeQuerySpace,
boolean allowCollectionFetches,
PropertyPath propertyPath) {
super( compositeQuerySpace, propertyPath );
this.allowCollectionFetches = allowCollectionFetches;
}
@Override
public void validateFetchPlan(FetchStrategy fetchStrategy, AttributeDefinition attributeDefinition) {
// anything to do here?
}
protected CompositeAttributeFetch createCompositeAttributeFetch(
AttributeDefinition attributeDefinition,
ExpandingCompositeQuerySpace compositeQuerySpace) {
return new NestedCompositeAttributeFetchImpl(
this,
attributeDefinition,
compositeQuerySpace,
allowCollectionFetches
);
}
@Override
public CollectionAttributeFetch buildCollectionAttributeFetch(
AssociationAttributeDefinition attributeDefinition,
FetchStrategy fetchStrategy) {
if ( !allowCollectionFetches ) {
throw new WalkingException(
String.format(
"This composite path [%s] does not allow collection fetches (composite id or composite collection index/element",
getPropertyPath().getFullPath()
)
);
}
return super.buildCollectionAttributeFetch( attributeDefinition, fetchStrategy );
}
}