org.eclipse.rdf4j.spin.function.Not 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.spin.function;
import org.eclipse.rdf4j.model.Value;
import org.eclipse.rdf4j.model.ValueFactory;
import org.eclipse.rdf4j.model.impl.BooleanLiteral;
import org.eclipse.rdf4j.model.vocabulary.SP;
import org.eclipse.rdf4j.query.algebra.evaluation.ValueExprEvaluationException;
import org.eclipse.rdf4j.query.algebra.evaluation.function.UnaryFunction;
import org.eclipse.rdf4j.query.algebra.evaluation.util.QueryEvaluationUtil;
public class Not extends UnaryFunction {
@Override
public String getURI() {
return SP.NOT.toString();
}
@Override
protected Value evaluate(ValueFactory valueFactory, Value arg) throws ValueExprEvaluationException {
return BooleanLiteral.valueOf(!QueryEvaluationUtil.getEffectiveBooleanValue(arg));
}
}