JDeveloper HttpConnection

Question

Help
I am trying to open a connection in JDeveloper but I'm getting a NullPointerException at (hc.openInputStream()).There is no response from the connection.I'm using apache as the web container. Here is the code
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.StringTokenizer;
import java.util.Vector;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import org.kxml.Xml;
import org.kxml.parser.ParseEvent;
import org.kxml.parser.XmlParser;
public class XMLDataParser{
     protected XMLDataEventListener mXMLDataEventListener;
     protected Vector columnVector = null;
     protected Vector dataVector = null;
     public void setXMLDataListener(XMLDataEventListener listener) {
          mXMLDataEventListener = listener;
          columnVector = new Vector();
          dataVector = new Vector();
     // Non-blocking.
     public void parse(
          final String url,
          final String viewName,
          final String parameters) {
          Thread t = new Thread() {
               public void run() {
                         // set up the network connection
     HttpConnection hc = null;
int getResponse;
                    try {
                         //System.out.println(url + viewName + parameters);
                         (hc ==
                              (HttpConnection) Connector.open(
//url + viewName + parameters)){
                    getResponse = hc.getResponseCode();
                    System.out.println(getResponse);
// if (hc.getResponseCode()==HttpConnection.HTTP_OK){
// System.out.println("Connection OK");
// else {
// System.out.println("Connection Not Ok");
// if(hc == null)System.out.println("hc is null");
                         parse(hc.openInputStream(),viewName);
                    } catch (IOException ioe) {
mXMLDataEventListener.exception(ioe.toString());
                    } finally {
                         try {
                              if (hc != null)
                                   hc.close();
                         } catch (IOException ignored) {
          t.start();
     // Blocking.
     public void parse(InputStream in) throws IOException {
          Reader reader = new InputStreamReader(in);
          String metaDataStr = null;
          String exception = null;
          XmlParser parser = new XmlParser(reader);
          ParseEvent pe = null;
          parser.skip();
          parser.read(Xml.START_TAG, null, "ScanAppConfig");
          parser.skip();
          pe = parser.read();
          if (pe.getType() == Xml.START_TAG) {
               String name = pe.getName();
//               System.out.println("Tag Name=" + name);
               if (name.equals("ConfigKeys")) {
                    while ((pe.getType() != Xml.END_TAG)
                         || (pe.getName().equals(name) == false)) {
                         pe = parser.read();
                         metaDataStr = pe.getText();
//                         System.out.println(
//                              "ConfigKeys Parser Event=" + pe.toString());
                         columnVector = parseString(metaDataStr, columnVector);
          boolean trucking = true;
          boolean first = true;
          while (trucking) {
               pe = parser.read();
               if (pe.getType() == Xml.START_TAG) {
                    String name = pe.getName();
//                    System.out.println("Inside trucking Tag Name =" + name);
                    if (name.equals("ConfigDetails")) {
                         int currentColumn = 0;
                         int totalColumns = columnVector.size();
                         while ((pe.getType() != Xml.END_TAG)
                              || (pe.getName().equals(name) == false)) {
                              pe = parser.read();
                              if (pe.getType() == Xml.START_TAG
                                   && pe.getName().equals(
                                        (String) columnVector.elementAt(
                                             currentColumn))) {
                                   currentColumn++;
                                   pe = parser.read();
                                   dataVector.addElement(pe.getText());
//                                   System.out.println(pe.getText());
                              if (currentColumn > totalColumns) {
                                   break;
                    } else {
                         while ((pe.getType() != Xml.END_TAG)
                              || (pe.getName().equals(name) == false))
                              pe = parser.read();
               if (pe.getType() == Xml.END_TAG
                    && pe.getName().equals("ScanAppConfig")) {
                    trucking = false;
                    mXMLDataEventListener.itemParsed(columnVector, dataVector);
     // Blocking.
     public void parse(InputStream in, String viewName) throws IOException {
          Reader reader = new InputStreamReader(in);
          String metaDataStr = null;
          String exception = null;
          XmlParser parser = new XmlParser(reader);
          ParseEvent pe = null;
          parser.skip();
          parser.read(Xml.START_TAG, null, "Test");
          parser.skip();
          parser.read(Xml.START_TAG, null, viewName);
          parser.skip();
          pe = parser.read();
          if (pe.getType() == Xml.START_TAG) {
               String name = pe.getName();
               //System.out.println("Tag Name=" + name);
               if (name.equals("Message")) {
                    while ((pe.getType() != Xml.END_TAG)
                         || (pe.getName().equals(name) == false)) {
                         pe = parser.read();
                         //System.out.println("exception Parser Event=" + pe.toString());
                         exception = pe.getText();
                         //need investigation as the behavior of this tag
                         //is different from other tags!!!!!!!!
                         break;
                    //System.out.println("exception=" + exception);
                    mXMLDataEventListener.exception(exception);
          if (pe.getType() == Xml.START_TAG) {
               String name = pe.getName();
               //System.out.println("Tag Name=" + name);
               if (name.equals("MetaData")) {
                    while ((pe.getType() != Xml.END_TAG)
                         || (pe.getName().equals(name) == false)) {
                         pe = parser.read();
                         metaDataStr = pe.getText();
                         //System.out.println("metaDataStr Parser Event=" + pe.toString());
                         columnVector = parseString(metaDataStr, columnVector);
                    mXMLDataEventListener.metaDataParsed(columnVector);
          //CompID
          // CompName
          // ShipID
          //ShipName
          boolean trucking = true;
          boolean first = true;
          while (trucking) {
               pe = parser.read();
               if (pe.getType() == Xml.START_TAG) {
                    String name = pe.getName();
                    //System.out.println("Inside trucking Tag Name =" + name);
                    if (name.equals(viewName + "Details")) {
                         int currentColumn = 0;
                         int totalColumns = columnVector.size();
                         while ((pe.getType() != Xml.END_TAG)
                              || (pe.getName().equals(name) == false)) {
                              pe = parser.read();
                              if (pe.getType() == Xml.START_TAG
                                   && pe.getName().equals(
                                        (String) columnVector.elementAt(
                                             currentColumn))) {
                                   currentColumn++;
                                   pe = parser.read();
                                   dataVector.addElement(pe.getText());
                                   //                                   System.out.println(CompID);
                              if (currentColumn > totalColumns) {
                                   break;
                    } else {
                         while ((pe.getType() != Xml.END_TAG)
                              || (pe.getName().equals(name) == false))
                              pe = parser.read();
               if (pe.getType() == Xml.END_TAG
                    && pe.getName().equals("Test")) {
                    trucking = false;
                    mXMLDataEventListener.itemParsed(columnVector, dataVector);
     public Vector parseString(String metaDataStr, Vector columnVector) {
          if (metaDataStr == null) {
               return columnVector;
          StringTokenizer token = new StringTokenizer(metaDataStr, ",");
          while (token.hasMoreTokens()) {
               columnVector.addElement(token.nextToken());
          return columnVector;
}

Answer 1

That would be the wrong place to get JDeveloper from *if* you are planning to use it to customize/extend Fusion Applications (which is what this particular forum is about).
But I am not sure if that is really your intend as your question here and on Stackoverflow doesn't mention Fusion Apps.  If you want to just use JDeveloper independent of Fusion Apps, a better place to report this problem would be this forum: JDeveloper and ADF
If you do want to work with Fusion Applications and JDeveloper, you will need to get a different version of JDeveloper from eDelivery (as explained in the blog post https://blogs.oracle.com/fadevrel/entry/jdeveloper_versions_explained)
Hope this helps,
Oliver Steinmeier
Fusion Apps Developer Relations
https://blogs.oracle.com/fadevrel