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• Null.java

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br.eti.clairton.repository.Null Maven / Gradle / Ivy

package br.eti.clairton.repository;

import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.Expression;
import javax.persistence.criteria.Predicate;

/**
 * Cria o {@link Predicate} nulo.
 *
 * @author Clairton Rodrigo Heinzen [email protected]
 */
public class Null implements Comparator {
	private static final long serialVersionUID = 1L;

	/**
	 * {@inheritDoc}
	 */
	@Override
	public Predicate build(final CriteriaBuilder cb, final Expression x, final Object y) {
		return cb.isNull(x);
	}

	@Override
	public String toString() {
		return "∅";
	}
}