org.openrdf.repository.sail.SailTupleQuery Maven / Gradle / Ivy

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/* 
 * Licensed to Aduna under one or more contributor license agreements.  
 * See the NOTICE.txt file distributed with this work for additional 
 * information regarding copyright ownership. 
 *
 * Aduna licenses this file to you under the terms of the Aduna BSD 
 * License (the "License"); you may not use this file except in compliance 
 * with the License. See the LICENSE.txt file distributed with this work 
 * for the full License.
 *
 * 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.openrdf.repository.sail;

import java.util.ArrayList;

import info.aduna.iteration.CloseableIteration;

import org.openrdf.query.BindingSet;
import org.openrdf.query.QueryEvaluationException;
import org.openrdf.query.QueryResults;
import org.openrdf.query.TupleQuery;
import org.openrdf.query.TupleQueryResult;
import org.openrdf.query.TupleQueryResultHandler;
import org.openrdf.query.TupleQueryResultHandlerException;
import org.openrdf.query.algebra.TupleExpr;
import org.openrdf.query.impl.TupleQueryResultImpl;
import org.openrdf.query.parser.ParsedTupleQuery;
import org.openrdf.sail.SailConnection;
import org.openrdf.sail.SailException;

/**
 * @author Arjohn Kampman
 */
public class SailTupleQuery extends SailQuery implements TupleQuery {

	protected SailTupleQuery(ParsedTupleQuery tupleQuery, SailRepositoryConnection sailConnection) {
		super(tupleQuery, sailConnection);
	}

	@Override
	public ParsedTupleQuery getParsedQuery() {
		return (ParsedTupleQuery)super.getParsedQuery();
	}

	@Override
	public TupleQueryResult evaluate()
		throws QueryEvaluationException
	{
		TupleExpr tupleExpr = getParsedQuery().getTupleExpr();

		try {
			CloseableIteration bindingsIter;

			SailConnection sailCon = getConnection().getSailConnection();
			bindingsIter = sailCon.evaluate(tupleExpr, getActiveDataset(), getBindings(), getIncludeInferred());

			bindingsIter = enforceMaxQueryTime(bindingsIter);

			return new TupleQueryResultImpl(new ArrayList(tupleExpr.getBindingNames()), bindingsIter);
		}
		catch (SailException e) {
			throw new QueryEvaluationException(e.getMessage(), e);
		}
	}

	@Override
	public void evaluate(TupleQueryResultHandler handler)
		throws QueryEvaluationException, TupleQueryResultHandlerException
	{
		TupleQueryResult queryResult = evaluate();
		QueryResults.report(queryResult, handler);
	}
}