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/*
 * Copyright 2020 APICATALOG and HASMAC.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

package no.hasmac.rdf.impl;

import no.hasmac.rdf.RdfNQuad;
import no.hasmac.rdf.RdfResource;
import no.hasmac.rdf.RdfValue;

import java.util.Optional;

final class RdfNQuadImpl extends RdfTripleImpl implements RdfNQuad {

    private final RdfResource graphName;

    protected RdfNQuadImpl(RdfResource subject, RdfResource predicate, RdfValue object, RdfResource graphName) {
        super(subject, predicate, object);
        this.graphName = graphName;
    }

    @Override
    public Optional getGraphName() {
        return Optional.ofNullable(graphName);
    }

    @Override
    public String toString() {
        return  "RdfNQuadImpl[subject=" + getSubject()
                    + ", predicate=" + getPredicate()
                    + ", object=" + getObject()
                    + ", graph=" + graphName
                    + "]";
    }
}