MgiDataServlet.java

package edu.ucsf.mousedatabase.servlets;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Properties;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.gson.*;

import edu.ucsf.mousedatabase.Log;
import edu.ucsf.mousedatabase.MGIConnect;
import edu.ucsf.mousedatabase.objects.MGIResult;

/**
 * This is a JSON wrapper around the MGI data API.
 */
public class MgiDataServlet extends HttpServlet {
  private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public MgiDataServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

  /**
   * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
   */
  @SuppressWarnings("serial")
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    String query = request.getParameter("query");

    try
    {
      if (query== null)
      {
        response.sendError(HttpServletResponse.SC_BAD_REQUEST);
        return;
      }

      if (query.equals("allele_properties"))
      {
        String accIdParam = request.getParameter("acc_id");
        String expectedTypeName = request.getParameter("expected_type_name");
        if (accIdParam == null || expectedTypeName == null)
        {
          response.sendError(HttpServletResponse.SC_BAD_REQUEST);
          return;
        }
        try
        {
          Integer.parseInt(accIdParam);
        }
        catch(Exception ex)

        {
          response.sendError(HttpServletResponse.SC_BAD_REQUEST);
          return;
        }

        final int accessionId = Integer.parseInt(accIdParam);
        MGIResult result = null;
        if (expectedTypeName.equals("allele"))
        {
          result = MGIConnect.DoMGIAlleleQuery(Integer.toString(accessionId));
        } else if (expectedTypeName.equals("transgene")) {
          result = MGIConnect.DoMGITransgeneQuery(Integer.toString(accessionId));
        } else {
          response.getWriter().write("expected_type_name must be 'allele' or 'transgene'");
          response.sendError(HttpServletResponse.SC_BAD_REQUEST);
          return;
        }


        Properties data;
        if (result.isValid())
        {
          HashMap<Integer,Properties> props = MGIConnect.getPropertiesFromAlleleMgiID(new ArrayList<Integer>(){{add(accessionId);}}, 0);
          data = props.get(accessionId);
          data.setProperty("is_valid", "true");
        }
        else
        {
          data = new Properties();
          data.setProperty("is_valid", "false");
          data.setProperty("error_string", result.getErrorString());
        }
        Gson gson = new Gson();
        gson.toJson(data, response.getWriter());
        response.setStatus(HttpServletResponse.SC_OK);
      }
      else
      {
        response.sendError(HttpServletResponse.SC_BAD_REQUEST);
        return;
      }
    }
    catch(Exception e)
    {
      Log.Error("Error responding to mgidataservlet request",e);
      response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
    }
  }

  /**
   * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
  }

}