/*
 * 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 ) ) return false ;
        QuadDataAcc acc = (QuadDataAcc)other ;
        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") ;
    }
}