org.hibernate.jpa.criteria.predicate.ExistsPredicate Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of hibernate-entitymanager

A module of the Hibernate O/RM project

There is a newer version: 5.4.2.Final

/*
 * 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.jpa.criteria.predicate;

import java.io.Serializable;
import javax.persistence.criteria.Subquery;

import org.hibernate.jpa.criteria.CriteriaBuilderImpl;
import org.hibernate.jpa.criteria.ParameterRegistry;
import org.hibernate.jpa.criteria.Renderable;
import org.hibernate.jpa.criteria.compile.RenderingContext;

/**
 * Models an EXISTS() predicate
 *
 * @author Steve Ebersole
 */
public class ExistsPredicate
		extends AbstractSimplePredicate
		implements Serializable {
	private final Subquery subquery;

	public ExistsPredicate(CriteriaBuilderImpl criteriaBuilder, Subquery subquery) {
		super( criteriaBuilder );
		this.subquery = subquery;
	}

	public Subquery getSubquery() {
		return subquery;
	}

	@Override
	public void registerParameters(ParameterRegistry registry) {
		// nothing to do here
	}

	@Override
	public String render(boolean isNegated, RenderingContext renderingContext) {
		return ( isNegated ? "not " : "" ) + "exists "
				+ ( (Renderable) getSubquery() ).render( renderingContext );
	}
}