VirtuosoUpdateRequest.java

/*
 *  $Id$
 *
 *  This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
 *  project.
 *
 *  Copyright (C) 1998-2012 OpenLink Software
 *
 *  This project is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the
 *  Free Software Foundation; only version 2 of the License, dated June 1991.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 *
 */

package virtuoso.jena.driver;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.apache.jena.atlas.io.IndentedWriter;

import com.hp.hpl.jena.update.UpdateException;

public class VirtuosoUpdateRequest {
	private List requests = new ArrayList();
	private VirtGraph graph;
	private String virt_query;

	java.sql.Statement stmt = null;

	public VirtuosoUpdateRequest(VirtGraph _graph) {
		graph = _graph;
	}

	public VirtuosoUpdateRequest(String query, VirtGraph _graph) {
		this(_graph);
		virt_query = query;
		requests.add((Object) query);
	}

	public void exec() {
		try {
			stmt = graph.createStatement();

			for (Iterator iter = requests.iterator(); iter.hasNext();) {
				String query = "sparql\n " + (String) iter.next();
				stmt.execute(query);
			}

			stmt.close();
			stmt = null;
		} catch (Exception e) {
			throw new UpdateException("Convert results are FAILED.:", e);
		}

	}

	public void addUpdate(String update) {
		requests.add(update);
	}

	public Iterator iterator() {
		return requests.iterator();
	}

	public String toString() {
		StringBuffer b = new StringBuffer();

		for (Iterator iter = requests.iterator(); iter.hasNext();) {
			b.append((String) iter.next());
			b.append("\n");
		}
		return b.toString();
	}

	public void output(IndentedWriter out) {
		boolean first = true;
		out.println();

		for (Iterator iter = requests.iterator(); iter.hasNext();) {
			if (!first)
				out.println("    # ----------------");
			else
				first = false;
			System.out.println((String) iter.next());
			out.ensureStartOfLine();
		}

	}

}