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This is the Sesame API implementation based on Quest
There is a newer version: 1.18.1
package it.unibz.inf.ontop.sesame;

/*
 * #%L
 * ontop-quest-sesame
 * %%
 * Copyright (C) 2009 - 2014 Free University of Bozen-Bolzano
 * %%
 * 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.
 * #L%
 */

import it.unibz.inf.ontop.model.OBDAException;
import it.unibz.inf.ontop.owlrefplatform.core.QuestDBConnection;
import org.openrdf.model.ValueFactory;
import org.openrdf.model.impl.ValueFactoryImpl;
import org.openrdf.repository.RepositoryException;

import java.io.File;
import java.util.HashMap;
import java.util.Map;

public abstract class SesameAbstractRepo implements
		org.openrdf.repository.Repository, AutoCloseable {

	private RepositoryConnection repoConnection;
	private Map namespaces;
	boolean initialized = false;
	
	public SesameAbstractRepo() {
		namespaces = new HashMap<>();
	}

	@Override
    public RepositoryConnection getConnection() throws RepositoryException {
		try {
			this.repoConnection = new RepositoryConnection(this,
					getQuestConnection());
		} catch (OBDAException e) {
			System.err.println("Error creating repo connection!");
			e.printStackTrace();
            throw new RepositoryException(e.getMessage());
		}
		return repoConnection;

	}

	@Override
    public File getDataDir() {
		return null;
	}

	@Override
    public ValueFactory getValueFactory() {
		// Gets a ValueFactory for this Repository.
		return ValueFactoryImpl.getInstance();
	}

	@Override
    public void initialize() throws RepositoryException {
		// Initializes this repository.
		initialized = true;
	}
	
	@Override
    public boolean isInitialized() {
		return initialized;
	}

	public abstract QuestDBConnection getQuestConnection() throws OBDAException;

	@Override
    public boolean isWritable() throws RepositoryException {
		// Checks whether this repository is writable, i.e.
		// if the data contained in this repository can be changed.
		// The writability of the repository is determined by the writability
		// of the Sail that this repository operates on.
		return false;
	}

	@Override
    public void setDataDir(File arg0) {
		// Set the directory where data and logging for this repository is
		// stored.
	}

	@Override
    public void shutDown() throws RepositoryException {
		// Shuts the repository down, releasing any resources that it keeps hold
		// of.
		// Once shut down, the repository can no longer be used until it is
		// re-initialized.
		initialized =false;
		if(repoConnection!=null && repoConnection.isOpen())
			repoConnection.close();
		
	}

    @Override
    public void close() throws Exception {
        this.shutDown();
    }
	

	public abstract String getType();
	
	public void setNamespace(String key, String value)
	{
		namespaces.put(key, value);
	}
	
	public String getNamespace(String key)
	{
		return namespaces.get(key);
	}
	
	public Map getNamespaces()
	{
		return namespaces;
	}
	
	public void setNamespaces(Map nsp)
	{
		this.namespaces = nsp;
	}

	public void removeNamespace(String key) 
	{
		namespaces.remove(key);
	}

}