PresenceOfPlace.java

package kr.ac.kaist.resl.lilliput.rest;

import java.util.Collection;
import java.util.Iterator;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.restlet.ext.json.JsonRepresentation;
import org.restlet.resource.Get;
import org.restlet.resource.ServerResource;

import com.mongodb.MongoException;

import edu.stanford.smi.protege.model.Project;
import edu.stanford.smi.protege.server.RemoteProjectManager;
import edu.stanford.smi.protegex.owl.model.OWLModel;
import edu.stanford.smi.protegex.owl.model.OWLObjectProperty;
import edu.stanford.smi.protegex.owl.model.RDFIndividual;

public class PresenceOfPlace extends ServerResource{
	
	@Get("json")
	public JsonRepresentation toJson() throws Exception {
		try {
			String epc = (String)getRequest().getAttributes().get("uid");
			JSONArray resultArr =getIdentifiedObjects(epc);
			
			JsonRepresentation representation = new JsonRepresentation(resultArr);
			
			return representation;
		} catch (MongoException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (JSONException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}
	
	@SuppressWarnings("rawtypes")
	public JSONArray getIdentifiedObjects(String epc) throws Exception
	{
		RemoteProjectManager rpm = RemoteProjectManager.getInstance();
		Project p = rpm.getProject("localhost:5100", "Lilliput", "1234", "IoTSocialGraph", true);
		OWLModel owlModel = (OWLModel)p.getKnowledgeBase();
		RDFIndividual indoorInd = owlModel.getRDFIndividual(epc);
		if( indoorInd == null )
		{
			return null;
		}
		JSONArray identifiedJson = new JSONArray();
		
		OWLObjectProperty isIdentifying = owlModel.getOWLObjectProperty("isIdentifying");
		OWLObjectProperty isNear = owlModel.getOWLObjectProperty("isNear");
		OWLObjectProperty isOwned = owlModel.getOWLObjectProperty("isOwned");
		Collection idenCol = indoorInd.getPropertyValues(isIdentifying);
		Iterator idenIter = idenCol.iterator();
		while( idenIter.hasNext())
		{
			JSONObject resultObj = new JSONObject();
			RDFIndividual identified = (RDFIndividual)idenIter.next();
			resultObj.put("epc", identified.getBrowserText());
			
			JSONArray nearArr = new JSONArray();
			Collection nearCol = identified.getPropertyValues(isNear);
			Iterator nearIter = nearCol.iterator();
			while( nearIter.hasNext())
			{
				JSONObject nearObj = new JSONObject();
				RDFIndividual nearInd = (RDFIndividual)nearIter.next();
				nearObj.put("epc", nearInd.getBrowserText());
				
				JSONArray ownerArr = new JSONArray();
				Collection ownCol = nearInd.getPropertyValues( isOwned);
				Iterator ownIter = ownCol.iterator();
				while( ownIter.hasNext())
				{
					JSONObject ownObj = new JSONObject();
					RDFIndividual ownerInd = (RDFIndividual)ownIter.next();
					ownObj.put("epc", ownerInd.getBrowserText());
	
					ownerArr.put(ownObj);
				}
				
				nearObj.put("owners", ownerArr);				
				nearArr.put(nearObj);				
			}
			resultObj.put("nears", nearArr);		
			identifiedJson.put(resultObj);
		}
		p.dispose();
		return identifiedJson;		
	}
	
	
}