/*******************************************************************************
 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
 * in Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.db.layer0.request;

import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.common.exception.DebugException;
import org.simantics.db.common.request.BinaryRead;
import org.simantics.db.exception.AdaptionException;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.exception.ResourceNotFoundException;
import org.simantics.db.layer0.adapter.Valuations;
import org.simantics.layer0.Layer0;
import org.simantics.simulation.ontology.SimulationResource;

public class PossibleActiveValuation extends BinaryRead<Resource, String, Resource> {

    public PossibleActiveValuation(Resource resource) {
        super(resource, "");
    }

    public PossibleActiveValuation(Resource resource, String suffix) {
        super(resource, suffix);
    }

    @Override
    public Resource perform(ReadGraph graph) throws DatabaseException {

        try {

            if(!graph.hasStatement(parameter)) return null;

        	Layer0 b = Layer0.getInstance(graph);
            SimulationResource SIMU = SimulationResource.getInstance(graph);

            String valuationName = null;

            Valuations valuations = graph.adapt(parameter, Valuations.class);

            Resource diagram = graph.syncRequest(new PossibleDiagram(parameter));
            if(diagram != null) {

                String valuation = graph.getPossibleRelatedValue(diagram, SIMU.HasActiveExperiment);
                if(valuation != null) valuationName = valuation;

            }

            if(valuationName == null) {

                Resource model = graph.syncRequest(new PossibleModel(parameter));
                if (model != null) {
                    String valuation = graph.syncRequest(new PossibleActiveExperimentPath(model));
                    if(valuation != null) valuationName = valuation;
                }

            }

            if (valuationName == null) {

                valuationName = "BaseRealization";

            }

            Resource value = valuations.getValue(graph, null, valuationName, parameter2);

            return graph.getSingleObject(value, b.ConsistsOf);

        } catch (ResourceNotFoundException e) {
            if (DebugException.DEBUG)
                e.printStackTrace();
            return null;
        } catch (AdaptionException e) {
            if (DebugException.DEBUG)
                e.printStackTrace();
            return null;
        } catch (Throwable e) {
            if (DebugException.DEBUG)
                e.printStackTrace();
            return null;
        }

    }

}