/*
* 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 <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.query.criteria.internal.path;
import javax.persistence.criteria.Expression;
import javax.persistence.criteria.JoinType;
import javax.persistence.criteria.PluralJoin;
import javax.persistence.criteria.Predicate;
import javax.persistence.metamodel.Attribute;
import javax.persistence.metamodel.ManagedType;
import javax.persistence.metamodel.PluralAttribute;
import javax.persistence.metamodel.Type;
import org.hibernate.query.criteria.internal.CriteriaBuilderImpl;
import org.hibernate.query.criteria.internal.JoinImplementor;
import org.hibernate.query.criteria.internal.PathSource;
/**
* Support for defining joins to plural attributes (JPA requires typing based on
* the specific collection type so we cannot really implement all support in a
* single class)
*
* @author Steve Ebersole
*/
public abstract class PluralAttributeJoinSupport<O,C,E>
extends AbstractJoinImpl<O,E>
implements PluralJoin<O,C,E> {
public PluralAttributeJoinSupport(
CriteriaBuilderImpl criteriaBuilder,
Class<E> javaType,
PathSource<O> pathSource,
Attribute<? super O,?> joinAttribute,
JoinType joinType) {
super( criteriaBuilder, javaType, pathSource, joinAttribute, joinType );
}
@Override
public PluralAttribute<? super O, C, E> getAttribute() {
return (PluralAttribute<? super O, C, E>) super.getAttribute();
}
public PluralAttribute<? super O, C, E> getModel() {
return getAttribute();
}
@Override
protected ManagedType<E> locateManagedType() {
return isBasicCollection()
? null
: (ManagedType<E>) getAttribute().getElementType();
}
public boolean isBasicCollection() {
return Type.PersistenceType.BASIC.equals( getAttribute().getElementType().getPersistenceType() );
}
@Override
protected boolean canBeDereferenced() {
return !isBasicCollection();
}
@Override
protected boolean canBeJoinSource() {
return !isBasicCollection();
}
@Override
public JoinImplementor<O, E> on(Predicate... restrictions) {
return super.on( restrictions );
}
@Override
public JoinImplementor<O, E> on(Expression<Boolean> restriction) {
return super.on( restriction );
}
}