/*
 * 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
 *
 *   https://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 org.apache.jena.arq.querybuilder.updatebuilder;

import java.util.Map;

import org.apache.jena.graph.Node;
import org.apache.jena.sparql.core.Quad;
import org.apache.jena.sparql.core.Var;
import org.apache.jena.util.iterator.ExtendedIterator;

/**
 * An interface that defines a holder of quads.
 *
 */
public interface QuadHolder {

    /**
     * Get an extended iterator over the quads this holder holds.
     * 
     * @return the extended iterator.
     */
    public ExtendedIterator<Quad> getQuads();

    /**
     * Apply values to the variables in the quads held by this holder. May return
     * this holder or a new holder instance.
     * 
     * @param values the values to set.
     * @return a QuadHolder in which the variables have been replaced.
     */
    public QuadHolder setValues(Map<Var, Node> values);
}
