org.eclipse.rdf4j.spring.uuidsource.noveltychecking.NoveltyCheckingUUIDSource Maven / Gradle / Ivy

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Spring integration for RDF4J

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/*******************************************************************************
 * Copyright (c) 2021 Eclipse RDF4J contributors.
 *
 * 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.spring.uuidsource.noveltychecking;

import java.util.UUID;

import org.eclipse.rdf4j.model.IRI;
import org.eclipse.rdf4j.spring.support.RDF4JTemplate;
import org.eclipse.rdf4j.spring.support.UUIDSource;
import org.springframework.beans.factory.annotation.Autowired;

/**
 * @author Florian Kleedorfer
 * @since 4.0.0
 */
public class NoveltyCheckingUUIDSource implements UUIDSource {
	@Autowired
	private RDF4JTemplate rdf4JTemplate;

	@Override
	public IRI nextUUID() {
		return rdf4JTemplate.applyToConnection(
				con -> {
					IRI newId;
					do {
						newId = toURNUUID(UUID.randomUUID().toString());
					} while (con.hasStatement(newId, null, null, true));
					return newId;
				});
	}
}