OData. Java sample

package cherniak.bpmonline.com;
import java.io.OutputStream;
import java.net.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Attr;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
/**
* OData insert request for bpmonline
*
*/
public class App
{
    private static final String SERVICE_URL = "http://int-                web/Amdocs_T/0/ServiceModel/EntityDataService.svc/";
    private static final String AUTH_URL = "http://int-web/Amdocs_T/ServiceModel/AuthService.svc/Login";
    private static final String DS = "http://schemas.microsoft.com/ado/2007/08/dataservices";
    private static final String DSMD = "http://schemas.microsoft.com/ado/2007/08/dataservices/metadata";
    private static final String ATOM = "http://www.w3.org/2005/Atom";
    public static void main( String[] args ) throws Exception
    {
        CookieManager msCookieManager = new CookieManager();
        CookieHandler.setDefault(msCookieManager);
        if(GetAuthCookie("Supervisor", "Supervisor")) {
            CreateBpmEntityByOdataHttpExample(msCookieManager);
        }
    }
    public static boolean GetAuthCookie(String login, String password) {
        try{
            URL urlAuth = new URL(AUTH_URL);
            HttpURLConnection connection1Auth = (HttpURLConnection) urlAuth.openConnection();
            connection1Auth.setDoOutput(true);
            connection1Auth.setRequestMethod("POST");
            connection1Auth.setRequestProperty("Content-Type","application/json");
            String authJson = String.format("{\"UserName\": \"%s\", \"UserPassword\":\"%s\"}", login, password);
            byte[] outputBytes = authJson.getBytes("UTF-8");
            OutputStream os = connection1Auth.getOutputStream();
            os.write(outputBytes);
            os.close();
            int responseCode = connection1Auth.getResponseCode();
            return responseCode == 200;
        } catch (Exception e) {
            return false;
        }
    }
    public static void CreateBpmEntityByOdataHttpExample(CookieManager manager) {
        try{
            //Create xml document
            DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
            Document doc = docBuilder.newDocument();
            Element entry = doc.createElement("entry");
            Attr attrAtom = doc.createAttribute("xmlns");
            attrAtom.setValue(ATOM);
            entry.setAttributeNode(attrAtom);
            doc.appendChild(entry);
 
            Element content = doc.createElement("content");
            Attr attrType = doc.createAttribute("type");
            attrType.setValue("application/xml");
            content.setAttributeNode(attrType);
            entry.appendChild(content);
 
            Element properties = doc.createElement("properties");
            Attr attrMetadata = doc.createAttribute("xmlns");
            attrMetadata.setValue(DSMD);
            properties.setAttributeNode(attrMetadata);
            content.appendChild(properties);
 
            //Set Name of Contact
            Element name = doc.createElement("Name");
            Attr attrProp = doc.createAttribute("xmlns");
            attrProp.setValue(DS);
            name.setAttributeNode(attrProp);
            name.appendChild(doc.createTextNode("Test Person"));
            properties.appendChild(name);
 
            //Set Dear of Contact
            Element dear = doc.createElement("Dear");
            Attr attrOppo = doc.createAttribute("xmlns");
            attrOppo.setValue(DS);
            dear.setAttributeNode(attrOppo);
            dear.appendChild(doc.createTextNode("Mister"));
            properties.appendChild(dear);
 
            doc.setXmlStandalone(true);
 
            //Send insert request
            URL url = new URL(SERVICE_URL + "ContactCollection/");
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setDoOutput(true);
            connection.setRequestMethod("POST");
            connection.setRequestProperty("Accept", "application/atom+xml");
            connection.setRequestProperty("Content-Type","application/atom+xml;type=entry");
 
            //Add BPMCSRF
            for(HttpCookie cookie : manager.getCookieStore().getCookies()) {
                if(cookie.getName().equals("BPMCSRF")) {
                    connection.setRequestProperty("BPMCSRF", cookie.getValue());
                }
            }
            OutputStream os = connection.getOutputStream();
            TransformerFactory tf = TransformerFactory.newInstance();
            Transformer transformer = tf.newTransformer();
            transformer.transform(new DOMSource(doc), new StreamResult(os));
            os.close();
            int responseCode = connection.getResponseCode();
            System.out.println(responseCode);
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}