/*
 * 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.fuseki.servlets;

import org.apache.jena.atlas.lib.Pair;
import org.apache.jena.query.Query ;
import org.apache.jena.sparql.core.DatasetDescription ;
import org.apache.jena.sparql.core.DatasetGraph ;
import org.apache.jena.sparql.core.DynamicDatasets ;

public class SPARQL_QueryDataset extends SPARQL_Query
{
    public SPARQL_QueryDataset() {}

    @Override
    protected void validateRequest(HttpAction action)
    { }

    @Override
    protected void validateQuery(HttpAction action, Query query)
    { }

    /** Decide the dataset - this modifies the query
     *  If the query has a dataset description.
     */
    @Override
    protected Pair<DatasetGraph, Query> decideDataset(HttpAction action, Query query, String queryStringLog) {
        DatasetGraph dsg = action.getActiveDSG() ;
        DatasetDescription dsDesc = getDatasetDescription(action, query) ;
        if ( dsDesc != null ) {
            dsg = DynamicDatasets.dynamicDataset(dsDesc, dsg, false) ;
            if ( query.hasDatasetDescription() ) {
                query.getGraphURIs().clear() ;
                query.getNamedGraphURIs().clear() ;
            }
        }
        return Pair.create(dsg, query);
    }
}
