org.hibernate.query.criteria.internal.predicate.ExistsPredicate Maven / Gradle / Ivy
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Hibernate's core ORM functionality
/*
* 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.query.criteria.internal.predicate;
import java.io.Serializable;
import javax.persistence.criteria.Subquery;
import org.hibernate.query.criteria.internal.CriteriaBuilderImpl;
import org.hibernate.query.criteria.internal.ParameterRegistry;
import org.hibernate.query.criteria.internal.Renderable;
import org.hibernate.query.criteria.internal.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 );
}
}