org.hibernate.query.criteria.internal.expression.ListIndexExpression 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.expression;
import java.io.Serializable;
import javax.persistence.metamodel.ListAttribute;
import org.hibernate.query.criteria.internal.CriteriaBuilderImpl;
import org.hibernate.query.criteria.internal.ParameterRegistry;
import org.hibernate.query.criteria.internal.PathImplementor;
import org.hibernate.query.criteria.internal.compile.RenderingContext;
/**
* An expression for referring to the index of a list.
*
* @author Steve Ebersole
*/
public class ListIndexExpression extends ExpressionImpl implements Serializable {
private final PathImplementor origin;
private final ListAttribute listAttribute;
public ListIndexExpression(
CriteriaBuilderImpl criteriaBuilder,
PathImplementor origin,
ListAttribute listAttribute) {
super( criteriaBuilder, Integer.class );
this.origin = origin;
this.listAttribute = listAttribute;
}
public ListAttribute getListAttribute() {
return listAttribute;
}
public void registerParameters(ParameterRegistry registry) {
// nothing to do
}
public String render(RenderingContext renderingContext) {
return "index("
+ origin.getPathIdentifier()
+ ")";
}
}