package org.simantics.plant3d.geometry;

import java.util.HashMap;
import java.util.Map;

import org.simantics.databoard.Bindings;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.common.request.ResourceRead;
import org.simantics.db.exception.DatabaseException;
import org.simantics.layer0.Layer0;
import org.simantics.plant3d.ontology.Plant3D;

public class ParameterRead extends ResourceRead<Map<String, Object>> {
	    
	    public ParameterRead(Resource resource) {
            super(resource);
        }
	    
	    @Override
	    public Map<String, Object> perform(ReadGraph graph) throws DatabaseException {
	        Map<String,Object> parameters = new HashMap<>();
	        Layer0 L0 = Layer0.getInstance(graph);
	        Plant3D P3D = Plant3D.getInstance(graph);
	        
	        for (Resource assertion : graph.getObjects(resource, L0.Asserts)) {
                Resource rel = graph.getSingleObject(assertion, L0.HasPredicate);
                if (!rel.equals(P3D.hasParameter))
                    continue;
                Resource param = graph.getSingleObject(assertion, L0.HasObject);
                String name = graph.getRelatedValue(param, L0.HasName, Bindings.STRING);
                Object value = graph.getRelatedValue(param, P3D.hasParameterValue);
                parameters.put(name, value);
            }
	        for (Resource param : graph.getObjects(resource, P3D.hasParameter)) {
	            String name = graph.getRelatedValue(param, L0.HasName, Bindings.STRING);
	            Object value = graph.getRelatedValue(param, P3D.hasParameterValue);
	            parameters.put(name, value);
	        }
	        
	        return parameters;
	    }

	}