org.hibernate.query.sqm.tree.domain.SqmMaxElementPath Maven / Gradle / Ivy

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Hibernate's core ORM functionality

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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 http://www.gnu.org/licenses/lgpl-2.1.html
 */
package org.hibernate.query.sqm.tree.domain;

import org.hibernate.metamodel.model.domain.ManagedDomainType;
import org.hibernate.metamodel.model.domain.PluralPersistentAttribute;
import org.hibernate.query.SemanticException;
import org.hibernate.query.hql.spi.SemanticPathPart;
import org.hibernate.query.sqm.SqmPathSource;
import org.hibernate.query.sqm.SemanticQueryWalker;
import org.hibernate.query.hql.spi.SqmCreationState;

/**
 * @author Steve Ebersole
 */
public class SqmMaxElementPath extends AbstractSqmSpecificPluralPartPath {
	public static final String NAVIGABLE_NAME = "{max-element}";

	public SqmMaxElementPath(SqmPath pluralDomainPath) {
		//noinspection unchecked
		super(
				pluralDomainPath.getNavigablePath().append( NAVIGABLE_NAME ),
				pluralDomainPath,
				(PluralPersistentAttribute) pluralDomainPath.getReferencedPathSource()
		);
	}

	@Override
	public SemanticPathPart resolvePathPart(
			String name,
			boolean isTerminal,
			SqmCreationState creationState) {
		if ( getPluralAttribute().getElementPathSource().getSqmPathType() instanceof ManagedDomainType ) {
			//noinspection unchecked
			return getPluralAttribute().getElementPathSource().createSqmPath( this, creationState );
		}

		throw new SemanticException( "Collection element cannot be de-referenced : " + getPluralDomainPath().getNavigablePath() );
	}

	@Override
	public SqmPathSource getReferencedPathSource() {
		//noinspection unchecked
		return getPluralAttribute().getElementPathSource();
	}

	@Override
	public  X accept(SemanticQueryWalker walker) {
		return walker.visitMaxElementPath( this );
	}
}