org.eclipse.rdf4j.query.algebra.Avg Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2015 Eclipse RDF4J contributors, Aduna, and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Distribution License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*******************************************************************************/
package org.eclipse.rdf4j.query.algebra;
/**
* The AVG operator as defined in http://www.w3.org/TR/sparql11-query/#aggregates.
*
* Note that we introduce AVG as a first-class object into the algebra, despite it being defined as a compound of other
* operators (namely, SUM and COUNT). This allows us to more easily optimize evaluation.
*
* @author Jeen Broekstra
*/
public class Avg extends AbstractAggregateOperator {
public Avg(ValueExpr arg) {
super(arg);
}
public Avg(ValueExpr arg, boolean distinct) {
super(arg, distinct);
}
@Override
public void visit(QueryModelVisitor visitor) throws X {
visitor.meet(this);
}
@Override
public boolean equals(Object other) {
return other instanceof Avg && super.equals(other);
}
@Override
public int hashCode() {
return super.hashCode() ^ "Avg".hashCode();
}
@Override
public Avg clone() {
return (Avg) super.clone();
}
}