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Adapter for using MarkLogic with the Sesame Framework

There is a newer version: 1.0.2.1

/*
 * Copyright 2015-2016 MarkLogic Corporation
 *
 * Licensed 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 com.marklogic.semantics.sesame.client;

import org.openrdf.http.client.BackgroundTupleResult;
import org.openrdf.http.client.QueueCursor;
import org.openrdf.query.BindingSet;
import org.openrdf.query.QueryEvaluationException;
import org.openrdf.query.resultio.TupleQueryResultParser;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.InputStream;

/**
 * wrapper on Sesame BackgroundTupleResult
 *
 * @author James Fuller
 */
class MarkLogicBackgroundTupleResult extends BackgroundTupleResult {

	protected final Logger logger = LoggerFactory.getLogger(MarkLogicBackgroundGraphResult.class);

	/**
	 *  constructor
	 *
	 * @param parser
	 * @param in
	 */
	public MarkLogicBackgroundTupleResult(TupleQueryResultParser parser, InputStream in) {
		super(parser, in);
	}

	/**
	 * constructor
	 *
	 * @param queue
	 * @param parser
	 * @param in
	 */
	public MarkLogicBackgroundTupleResult(QueueCursor queue, TupleQueryResultParser parser, InputStream in) {
		super(queue, parser, in);
	}

    /**
     * wrap exception to return false instead of throwing error, debug log
     *
     */
    @Override
    public boolean hasNext()
            throws QueryEvaluationException
    {
        try {
            return super.hasNext();
        }catch(Exception e){
            logger.debug("hasNext() stream closed exception",e);
            return false;
        }
    }

	/**
	 * wrap exception, debug log
	 *
	 */
	@Override
	protected void handleClose() throws QueryEvaluationException {
		try {
			super.handleClose();
		}catch(Exception e){
			logger.debug("handleClose() stream closed exception",e);
		}
	}
}