/*
 * 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.sparql.core.Quad ;

/** Accumulate quads (including allowing variables) during parsing. */
public class QuadAcc extends QuadAccSink
{
    // A lists of Pairs: Node and Triple connector
    
    private final List<Quad> quads ;
    private final List<Quad> quadsView ;
    
    public QuadAcc()
    {
        this(new ArrayList<Quad>());
    }
    
    public QuadAcc(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 QuadAcc ) ) return false ;
        QuadAcc acc = (QuadAcc)other ;
        return quads.equals(acc.quads) ; 
    }

}