/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

package org.apache.jena.sparql.modify.request;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.apache.jena.atlas.lib.SinkToCollection;
import org.apache.jena.graph.Triple;
import org.apache.jena.sparql.core.Quad;
import org.apache.jena.sparql.core.TriplePath;
import org.apache.jena.sparql.syntax.TripleCollectorMark;

/** Accumulate quads (excluding allowing variables) during parsing. */
public class QuadDataAcc extends QuadDataAccSink implements TripleCollectorMark {
    private final List<Quad> quads;
    private final List<Quad> quadsView;

    public QuadDataAcc() {
        this(new ArrayList<Quad>());
    }

    public QuadDataAcc(List<Quad> quads) {
        super(new SinkToCollection<>(quads));
        this.quads = quads;
        this.quadsView = Collections.unmodifiableList(quads);
    }

    public List<Quad> getQuads() {
        return quadsView;
    }

    @Override
    public int hashCode() {
        return quads.hashCode();
    }

    @Override
    public boolean equals(Object other) {
        if ( !(other instanceof QuadDataAcc acc) )
            return false;
        return quads.equals(acc.quads);
    }

    @Override
    public int mark() {
        return quads.size();
    }

    @Override
    public void addTriple(int index, Triple triple) {
        check(triple);
        quads.add(index, new Quad(graphNode, triple));
    }

    @Override
    public void addTriplePath(int index, TriplePath tPath) {
        throw new UnsupportedOperationException("Can't add paths to quads");
    }
}
