de.hft.GA.GA.java Source code

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Here is the source code for de.hft.GA.GA.java

Source

package de.hft.GA;

import java.net.URI;

import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import de.hft.gradingassistant.GradingAssistantForFreeTextAnswers;
import de.hft.gradingassistant.record.*;

/**
 * This file defines the grading assistant resource class (to be hosted at the URI path "/gradingassistant")
 * 
 * @copyright 2014 HFT Stuttgart
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @author   Cornelia Kiefer, Verena Meyer
 */

@Path("/gradingassistant")
public class GA {

    //TODO: Index for what?
    private int index = 0;

    @Context
    UriInfo uriInfo;

    //Test if WebService is running.
    @GET
    @Path("/ping")
    @Produces(MediaType.TEXT_PLAIN)
    public String testIfWebserviceIsRunning() {
        return "true";
    }

    @POST
    @Path("/post")
    @Consumes(MediaType.APPLICATION_JSON)
    public Response postAPostedRecord(String json) {

        //transform the json formatted String entry to a ListOfPostedRecords       
        de.hft.gradingassistant.record.ListOfPostedRecords listOfPR = new de.hft.gradingassistant.record.ListOfPostedRecords();
        //create a JSONObject from argument String
        JSONObject obj = null;
        try {
            obj = new JSONObject(json);
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        //create a JSONArray from the JSONObject
        JSONArray arr = null;
        try {
            arr = obj.getJSONArray("records");
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        //String[] refa = {};
        //for each element in this array, collect field infos
        for (int i = 0; i < arr.length(); i++) {

            try {
                PostedRecord pr = new PostedRecord();

                //refa = arr.getJSONObject(i).getString("referenceanswer").split("\\n");
                pr.getPostedRecordString().put("studentId", "s" + arr.getJSONObject(i).getInt("id"));
                pr.getPostedRecordString().put("question", arr.getJSONObject(i).getString("question"));
                pr.getPostedRecordString().put("answer", arr.getJSONObject(i).getString("answer"));
                pr.getPostedRecordString().put("refAnswer", arr.getJSONObject(i).getString("referenceanswer"));
                pr.getPostedRecordString().put("languageFlag", arr.getJSONObject(i).getString("languageoptions"));

                pr.getPostedRecordDouble().put("threshold", arr.getJSONObject(i).getDouble("threshold"));
                pr.getPostedRecordInt().put("id", arr.getJSONObject(i).getInt("id"));
                pr.getPostedRecordInt().put("max", arr.getJSONObject(i).getInt("max"));
                pr.getPostedRecordInt().put("min", arr.getJSONObject(i).getInt("min"));
                pr.getPostedRecordInt().put("sec", arr.getJSONObject(i).getInt("sec"));
                pr.getPostedRecordInt().put("numAttepts", arr.getJSONObject(i).getInt("numAttempts"));

                listOfPR.getEntry().add(pr);

            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

        URI location = addEntry(listOfPR);
        String result = "";
        GradingAssistantForFreeTextAnswers ga = new GradingAssistantForFreeTextAnswers();
        ga.readPostedRecords(listOfPR);

        if (arr.length() >= 1) { //more than one student answer: sort   

            ga.doAnalysis();
            result = ga.getAnalyzedRecordsAsJSONString();

        } else { //less than one student answer: no sorting required
            result = ga.getListOfPRAsJSONString();
        }

        // return HTTP status 201 "created" with location of new resource
        return Response.created(location).entity(result).build();

    }

    private URI addEntry(ListOfPostedRecords listOfPR) {

        // create location of new resource
        URI location = uriInfo.getAbsolutePathBuilder().path("" + index).build();

        index++;
        // set location as href
        listOfPR.setHref(location.toString());

        // return new location
        return location;
    }
}