/*
* $Header$
* $Revision: 982 $
* $Date: 2006-12-08 18:42:51 +1000 (Fri, 08 Dec 2006) $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2003-2009 The JRDF Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* the JRDF Project (http://jrdf.sf.net/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The JRDF Project" and "JRDF" must not be used to endorse
* or promote products derived from this software without prior written
* permission. For written permission, please contact
* newmana@users.sourceforge.net.
*
* 5. Products derived from this software may not be called "JRDF"
* nor may "JRDF" appear in their names without prior written
* permission of the JRDF Project.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the JRDF Project. For more
* information on JRDF, please see <http://jrdf.sourceforge.net/>.
*
*/
package org.jrdf.query.server.local;
import org.jrdf.PersistentGlobalJRDFFactory;
import org.jrdf.PersistentGlobalJRDFFactoryImpl;
import org.jrdf.graph.global.MoleculeGraph;
import org.jrdf.query.answer.Answer;
import org.jrdf.query.server.GraphApplication;
import org.jrdf.sparql.SparqlConnection;
import org.jrdf.util.DirectoryHandler;
import org.restlet.Application;
import org.restlet.resource.ResourceException;
public class GraphApplicationImpl extends Application implements GraphApplication {
private final DirectoryHandler handler;
private final PersistentGlobalJRDFFactory factory;
private final SparqlConnection sparqlConnection;
private Answer answer;
private boolean tooManyRows;
private long maxRows;
public GraphApplicationImpl(DirectoryHandler newHandler, SparqlConnection newConnection) {
this.handler = newHandler;
this.factory = PersistentGlobalJRDFFactoryImpl.getFactory(handler);
this.sparqlConnection = newConnection;
}
public void close() {
factory.close();
}
public MoleculeGraph getGraph(String name) {
return factory.getGraph(name);
}
public MoleculeGraph getGraph() {
return factory.getNewGraph();
}
public Answer answerQuery(String graphName, String queryString, long newMaxRows) throws ResourceException {
try {
final MoleculeGraph graph = getGraph(graphName);
this.answer = sparqlConnection.executeQuery(graph, queryString);
this.maxRows = newMaxRows;
this.tooManyRows = answer.numberOfTuples() > newMaxRows;
return answer;
} catch (Exception e) {
throw new ResourceException(e);
}
}
public long getTimeTaken() {
return answer.getTimeTaken();
}
public boolean isTooManyRows() {
return tooManyRows;
}
public DirectoryHandler getHandler() {
return handler;
}
public void setMaxRows(long newMaxRows) {
this.maxRows = newMaxRows;
}
public long getMaxRows() {
return maxRows;
}
public String getGraphsDir() {
return handler.getDir().getName();
}
}