JAVA Object Calling in VB

Hi All,
Is there any way to call an java object(s) in Visual Basic??

Did you try to google?
Why do you want to call Java from VB?

Similar Messages

Newbie Help: Java Object to create an image

Hi there.
I'm trying to create a Java class that I can call from Coldfusion that will build a GIF file based on parameters.
The idea is, the Java object opens a "background" gif file and then writes some text onto it and saves the whole thing out as a GIF.
Bearing in mind this class will be used directly by Coldfusion, and so isn't an applet or an application...can anyone tell me what is wrong with this code as I get a null pointer exception on the getGraphics() line:
// Methods available to Coldfusion
public String CreateOverlay( String imageFile, String outPath, String overlayText, int x, int y, String fontFace, int PointSize)
try{
Toolkit tk = Toolkit.getDefaultToolkit();
Image im = tk.getImage(imageFile);
Gif89Encoder enc = new Gif89Encoder();
OutputStream out = new BufferedOutputStream(
new FileOutputStream(outPath)
Image newimg = createImage(100,50);
***** Graphics g = newimg.getGraphics();
g.drawImage(im, 0, 0, 100, 50, this);
g.drawLine(0,0,50,50);
enc.addFrame( newimg );
enc.encode(out);
out.close();
catch (Exception e) {
System.out.println("Error...");
e.printStackTrace();
return "Dont care at the moment";
Any help to this troubled newbie would be appreciated.

Hi Kurt,
You must call "setVisible(true)" on your Frame before
creating the image.But, the thing is, this object doesnt have (or need) a GUI. Its just an object that sits on the server and its methods are called to generate an image on disk. Basically what happens is Coldfusion receives information from a user and it loads the java object, calls a method which then generates a new GIF file that is made up of a simple button background and some text (entered by the user)....it then returns the name of this file to Coldfusion and Coldfusion stores it in a database for later retrieval.
In simple terms:
COLDFUSION===========
1. Creates an instance of the JAVA Object
2. Call the generateGif method passing an image filename and some text eg:
newFile=c.GenerateGif( "simplebutton.gif", "Some text for button");
JAVA OBJECT========= (GenerateGif method)
1. Load the GIF simplebutton.gif
2. Create a new blank image
3. Draw the loaded GIF onto the blank one
4. Write the Text ("some text for button") onto the image
5. Take the image and encode it to GIF format
6. Write this GIF to disk
7. Return the filename of the new GIF image just created
8. Finish
As you can see, I dont want or need a GUI.....
Is this possible ?
Thanks in Advance,
Tony Johnson

How can I call a java object from Web dynpro ABAP application?

I made Web dynpro ABAP application and posted it to SAP EP.
For certain business purpose, we need to call external 3rd party java object using 3rd party's java api in Web dynpro application.
Is there anybody who experienced this kind of java interface issue?
I know Web dynpro Java environment can fully support this kind of requirement. but regarding Web dynpro ABAP, I couldn't find any clue for this.
Any comment or suggestion would be greatly appreciated.
Thanks,
Raymond, ABAP Consultant

if you have jco configured, then you can make calls to java api from ABAP .
check out this weblog.
/people/gregor.wolf3/blog/2004/08/26/setup-and-test-sap-java-connector-outbound-connection
Raja

Calling Web Service Proxy with Custom java Object as parameter

I created a web service proxy from WSDL URL using JDeveloper 11g(.5 version)
I need to call a webservice method which takes custom Java Object( Ex: ABC.java) as Input parameter. It creates the XSD java (ABC.java) file for that.
@XmlElementRef(name = "abc", namespace = "http://impl.service.ns.test", type = JAXBElement.class)
protected JAXBElement<ABC> abc;
ABC.java has a property of type java.util.Set of a custom Java Object (Set<XYZ.class>)
It doesn't create xsd file for XYZ.java.
@XmlElementRef(name = "XYZ", namespace = "http://model.ns.test/xsd", type = JAXBElement.class)
protected JAXBElement<Set> xyz;
Please help me.

The passing of Java objects in and out of a web service is NOT supported. variables must be xml documents defined by a XML schema. In my opinion, missing Java object and WSDL is not a good idea. -Edwin

Error could not access a java object field called allowAppDataInServContext after Applying Security

After applying the security patch 12-26 I am getting the error "Could not access a java object field called allowAppDataInServContext". When I removed the update the error goes away. When I read the update it returns.
The error states it occurred in the following line: cfapplication name="somename" clientmanagement="No" sessionmanagement="Yes" setclientcookies="Yes"

Is it a linux server? Look at the following, second comment.
http://blogs.coldfusion.com/post.cfm/coldfusion-security-update
^_^
EDIT: Also, http://www.shilpikhariwal.com/2012/12/security-hotfix-for-coldfusion-9-and.html

Calling a java object from a store procedure

I have written a translation object in java that takes a $en_var in and returns its path.
What I need to do is call that object from a PL/SQL store procedure. All the examples I have seen treat the store procedure as a wrapper around the java object.
But in my store procedure calling the object is only one part of the procedures role:
The store procedure code is :
CREATE OR REPLACE PROCEDURE WRITE_TO_FILE(in_file_name IN VARCHAR, in_en_var IN VARCHAR)
file_handle UTL_FILE.FILE_TYPE;
file_location VARCHAR2(50)
BEGIN
I need to be able to call the javaobject translation here
file_location = translation.translatePath(in_en_var)
file_handle := UTL_FILE.FOPEN(file_location, in_file_name, 'w');
dbms_output.put_line ('input file name opened file name' ||in_file_name ||'-->' ||in_file_location);
UTL_FILE.put_line(file_handle,'Hello Tony);
UTL_FILE.FCLOSE(file_handle);
END WRITE_TO_FILE;
I call the java class method translatePath with a string the en_var which returns the path as a string which is then passed as a parameter to UTL_FILE.FOPEN.
Thanks for any help
Tony

No Longer the problem

Why java is called pure object oriented.

i know that java is called as pure object oriented language.
why it is called so even though it has primitive datatypes and also it doesnot support multiple inheritance completely. it only supports in the case of interfaces but not in the case of classes. then why it is called pure object oriented.

Its because you cannot write an executable java program without creating an object. Well, you can:
public class a
public static void main( String a[] )
}In contrary to C++, there can be no variables or functions in the wild (outside a class).
You can not create an executable java program without creating a class (but not forcibly its instance, an object.)
The "pure object oriented" wording in this sense has not really much importance, it is rather a marketing ploy.

Why java is called as true object oriented language?

HI Friends,
Though few oops concepts is not supported , why java is called as truly object oriented language and C++ as not a purely object oriented language???? Please, if any one know , give me the answer.
Thanks to all.

few oops concepts is not supportedwhich concepts?
as far as i know...to be OO, you must supports
encapsulation, abstraction, inheritancxe, composition (aggretration, et all) and polymorphism. Java supports all those comcept..now..Java is a hybrid due to what Jverd has pointed out.
the only pure OO language that i know of is SmallTalk. they have Meta class that can create Class object. and all their primitaives are object.
C# comes close, but their Class are not object.

Can I package and call a java object in the swf? (on the client)

Hello,
Can I package and call/execute a java object within the
swf/adobe flash player?
I want to embed a java object in my swf, and then whne the
swf executes have it call the java object......
E.

..... there are few instances where it would be nice to
develope a single java object that can be used on the server and
the client..... let's say for the case of server side validation,
that could also be used by the client application for validation,
instead of having to maintain 2 sets of validation logic in two
different languages (java and AS).....

Java callback / Calling object identification

This runs on very similar lines to the topic by rishab, "Knowing the identity of the calling application."
Basically, when an arbitrary method is called on an arbitrary object, I need to be able to get a reference to the calling object, for authorization and callback purposes.
Details...
* All objects that require this will be subclasses of a common class, so this functionality can be implemented in that class.
* These objects should be pluggable - created by anyone, compiled and added on the fly, therefore implementation of this should not be required in subclasses.
* A reference to the calling object is required, without the object being passed, so such authorization cannot be compromised by providing proxy accessors or passing bogus objects.
* Reflection to call a method from a base class and force passing the calling method appears to be infeasible, since exact method-type matching appears to prevent polymorphism in reflection.
SecurityManager.getClassContext() is halfway there, in that is exposes what kind of object called the method, but for complete authorization and callback it is necessary to know which instance called the method.
If anyone has any information that might get me on the right track, I would be most grateful.
Regards,
-Troy

As you mentioned, this is very similar to another topic posted. To obtain an object reference to a caller WITHOUT sending an object reference is "de facto" problematic. Any solution will require a compromise to the design terms you described.
I think there's no pratical way to get around passing an object reference as a parameter. However, you could create an interface implemented by all calling classes that would contain a specific call-back method that would authorize the client before allowing the method to proceed.
This would require some sort of basic shared secret or handshake to be returned by the client's implementation of the interface method. Otherwise, you could implant the correct response into the client's superclass and declare it final. That way, when the shared object invokes the superclass method on the client, it could verify the instance and simply return a boolean.
public class SharedObject {
myMethod(Object O) {
...check if O implements myInterface...
...call ((myInterface)O).checkMyClient()
...if I'm satified, continue to interact with O
...else do nothing
}

Generation of XML file from Java objects using castor

I have the following java file(Customer.java).
public class Customer
     private String ID;
     private FirstName firstName;
     private MiddleName middleName;
     private LastName lastName;
     private ArrayList address;
     public ArrayList getAddress() {
          return address;
     public void setAddress(ArrayList address) {
          this.address = address;
     public FirstName getFirstName() {
          return firstName;
     public void setFirstName(FirstName firstName) {
          this.firstName = firstName;
     public String getID() {
          return ID;
     public void setID(String id) {
          ID = id;
     public LastName getLastName() {
          return lastName;
     public void setLastName(LastName lastName) {
          this.lastName = lastName;
     public MiddleName getMiddleName() {
          return middleName;
     public void setMiddleName(MiddleName middleName) {
          this.middleName = middleName;
Using castor i have created an xml file(customer.xml) which has the following format.
<?xml version="1.0" encoding="UTF-8" ?>
- <customer ID="fbs0001">
<FIRSTNAME>Fred</FIRSTNAME>
<MIDDLENAME>B</MIDDLENAME>
<LASTNAME>Scerbo</LASTNAME>
- <ADDRESS>
<FIRSTLINE>No 18, Sheshadri road</FIRSTLINE>
<SECONDLINE>Gandhinagar Bangalore</SECONDLINE>
</ADDRESS>
- <ADDRESS>
<FIRSTLINE>ITPL</FIRSTLINE>
<SECONDLINE>Whitefield Bangalore</SECONDLINE>
</ADDRESS>
</customer>
I have used a mapping file to get this output.Is there a way where i can get the output xml in the following format without changing the Java object structure.If yes then please suggest how this can be done.
<?xml version="1.0" encoding="UTF-8" ?>
- <customer ID="fbs0001">
<FIRSTNAME>Fred</FIRSTNAME>
<MIDDLENAME>B</MIDDLENAME>
<LASTNAME>Scerbo</LASTNAME>
</customer>
<ADDRESS>
<FIRSTLINE>No 18, Sheshadri road</FIRSTLINE>
<SECONDLINE>Gandhinagar Bangalore</SECONDLINE>
</ADDRESS>
- <ADDRESS>
<FIRSTLINE>ITPL</FIRSTLINE>
<SECONDLINE>Whitefield Bangalore</SECONDLINE>
</ADDRESS>
I mean the output xml file should have the address as a separate tag not withing the root tag customer.

Hello,
Castor's own discussion groups might be able to point you to the solution you're looking for (if this use case is possible using Castor).
Oracle has its own object-to-XML mapping tool that is part of the TopLink product. It allows you to map existing objects to an existing XML Schema. This can be done visually using the TopLink Workbench, or programmatically using the TopLink APIs. TopLink OXM also supports the JAXB specification.
Using TopLink OXM to get the desired XML result I would recommend the following. Map the Customer and Address classes to XML, but don't map the relationship between Customer and Address. Then make the calls to the marshaller something like the following:
marshaller.marshal(aCustomer, System.out);
for(int x=0; x<aCustomer.getAddress().size(); x++) {
     marshal(aCustomer.getAddress().get(x), System.out);
Example - Using TopLink OXM to map an existing object model to an existing XML Schema:
http://www.oracle.com/technology/products/ias/toplink/preview/10.1.3dp4/howto/ox/index.htm
For more information on TopLink object-to-XML mapping:
http://www.oracle.com/technology/products/ias/toplink/preview/10.1.3dp4/objectxml/index.html
-Blaise

How to reference multiple instances of the same Java object from PL/SQL?

Dear all,
I'm experimenting with calling Java from PL/SQL.
My simple attempts work, which is calling public static [java] methods through PL/SQL wrappers from SQL (and PL/SQL). (See my example code below).
However it is the limitation of the public static methods that puzzels me.
I would like to do the following:
- from PL/SQL (in essence it needs to become a forms app) create one or more objects in the java realm
- from PL/SQL alter properties of a java object
- from PL/SQL call methods on a java object
However I fail to see how I can create multiple instances of an object and reference one particular object in the java realm through public static methods.
My current solution is the singleton pattern: of said java object I have only 1 copy, so I do not need to know a reference to it.
I can just assume that there will only ever be 1 of said object.
But I should be able to make more then 1 instance of an object.
To make it more specific:
- suppose I have the object car in the java realm
- from PL/SQL I want to create a car in the java realm
- from PL/SQL I need to give it license plates
- I need to start the engine of a scpecific car
However if I want more then 1 car then I need to be able to refrence them. How is this done?
Somehow I need to be able to execute the following in PL/SQL:
DECLARE
vMyCar_Porsche CAR;
vMyCar_Fiat CAR;
BEGIN
vMyCar_Porsche = new CAR();
vMyCar_Fiat = new CAR();
vMyCar_Porsche.setLicensePlates('FAST');
vMyCar_Porsche.startEngine();
vMyCar_Fiat.killEngine();
END;
Thanks in advance.
Best Regards,
Ruben
My current example code is the following:
JAVA:
===
CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED CODAROUL."RMG/BO/RMG_OBJECT" as package RMG.BO;
public class RMG_OBJECT {
private static RMG_OBJECT instance = new RMGOBJECT();
private String rmgObjectNaam;
private RMG_OBJECT(){
this.rmgObjectNaam = "NonDetermined";
public static String GET_RMGOBJECT_NAAM () {
String toestand = null;
if (_instance == null) {toestand = "DOES NOT EXIST";} else { toestand = "EXISTS";};
System.out.println("instance : " + toestand);
System.out.println("object name is : " + _instance.rmgObjectNaam);
return _instance.rmgObjectNaam;
public static Integer SET_RMGOBJECT_NAAM (String IN)
try
_instance.rmgObjectNaam = IN;
return 1;
catch (Exception e)//catch
System.out.println("Other Exception: " + e.toString());
e.printStackTrace();
return 5;
} //catch
PL/SQL Wrapper:
==========
CREATE OR REPLACE FUNCTION CODAROUL.SET_RMGOBJECT_NAAM(NAAM IN VARCHAR2) return NUMBER AS
LANGUAGE JAVA NAME 'RMG.BO.RMG_OBJECT.SET_RMGOBJECT_NAAM (java.lang.String) return java.lang.Integer';
Calling from SQL:
==========
CALL dbms_java.set_output(2000);
select CODAROUL.GET_RMGOBJECT_NAAM() from dual;
Edited by: RubenS_BE on Apr 6, 2012 5:35 AM
Edited by: 925945 on Apr 6, 2012 5:41 AM

You can do this by manually creating a new iterator binding in your binding tab.
So instead of dragging the VO directly to the page, go to the binding tab, add a new executable iterator binding, and point to that one from your ELs in the page itself.

How can I use XStream to persist complicated Java Object to XML & backward

Dear Sir:
I met a problem as demo in my code below when i use XTream to persist my Java Object;
How can I use XStream to persist complicated Java Object to XML & backward??
See
[1] main code
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;
public class PhoneList {
     ArrayList<PhoneNumber> phones;
     ArrayList<Person> person;
     private PhoneList myphonelist ;
     private LocationTest location;
     private PhoneList(String name) {
     phones = new ArrayList<PhoneNumber>();
     person = new ArrayList<Person>();
     public ArrayList<PhoneNumber> getphones() {
          return phones;
     public ArrayList<Person> getperson() {
          return person;
     public void addPhoneNumber(PhoneNumber b1) {
          this.phones.add(b1);
     public void removePhoneNumber(PhoneNumber b1) {
          this.phones.remove(b1);
     public void addPerson(Person p1) {
          this.person.add(p1);
     public void removePerson(Person p1) {
          this.person.remove(p1);
     public void BuildList(){
          location = new LocationTest();
          XStream xstream = new XStream();
          myphonelist = new PhoneList("PhoneList");
          Person joe = new Person("Joe, Wallace");
          joe.setPhone(new PhoneNumber(123, "1234-456"));
          joe.setFax(new PhoneNumber(123, "9999-999"));
          Person geo= new Person("George Nixson");
          geo.setPhone(new PhoneNumber(925, "228-9999"));
          geo.getPhone().setLocationTest(location);
          myphonelist.addPerson(joe);
          myphonelist.addPerson(geo);
     public PhoneList(){
          XStream xstream = new XStream();
          BuildList();
          saveStringToFile("C:\\temp\\test\\PhoneList.xml",convertToXML(myphonelist));
     public void saveStringToFile(String fileName, String saveString) {
          BufferedWriter bw = null;
          try {
               bw = new BufferedWriter(
                         new FileWriter(fileName));
               try {
                    bw.write(saveString);
               finally {
                    bw.close();
          catch (IOException ex) {
               ex.printStackTrace();
          //return saved;
     public String getStringFromFile(String fileName) {
          BufferedReader br = null;
          StringBuilder sb = new StringBuilder();
          try {
               br = new BufferedReader(
                         new FileReader(fileName));
               try {
                    String s;
                    while ((s = br.readLine()) != null) {
                         // add linefeed (\n) back since stripped by readline()
                         sb.append(s + "\n");
               finally {
                    br.close();
          catch (Exception ex) {
               ex.printStackTrace();
          return sb.toString();
     public String convertToXML(PhoneList phonelist) {
          XStream xstream = new XStream(new DomDriver());
          xstream.setMode(xstream.ID_REFERENCES) ;
          return xstream.toXML(phonelist);
     public static void main(String[] args) {
          new PhoneList();
}[2].
import java.io.Serializable;
import javax.swing.JFrame;
public class PhoneNumber implements Serializable{
       private      String      phone;
       private      String      fax;
       private      int      code;
       private      String      number;
       private      String      address;
       private      String      school;
       private      LocationTest      location;
       public PhoneNumber(int i, String str) {
            setCode(i);
            setNumber(str);
            address = "4256, Washington DC, USA";
            school = "Washington State University";
     public Object getPerson() {
          return null;
     public void setPhone(String phone) {
          this.phone = phone;
     public String getPhone() {
          return phone;
     public void setFax(String fax) {
          this.fax = fax;
     public String getFax() {
          return fax;
     public void setCode(int code) {
          this.code = code;
     public int getCode() {
          return code;
     public void setNumber(String number) {
          this.number = number;
     public String getNumber() {
          return number;
     public void setLocationTest(LocationTest bd) {
          this.location = bd;
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(location);
        f.getContentPane().add(location.getControls(), "Last");
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
     public LocationTest getLocationTest() {
          return location;
     }[3].
package test.temp;
import java.io.Serializable;
public class Person implements Serializable{
     private String           fullname;
       @SuppressWarnings("unused")
     private PhoneNumber      phone;
       @SuppressWarnings("unused")
     private PhoneNumber      fax;
     public Person(){
     public Person(String fname){
            fullname=fname;
     public void setPhone(PhoneNumber phoneNumber) {
          phone = phoneNumber;
     public void setFax(PhoneNumber phoneNumber) {
          fax = phoneNumber;
     public PhoneNumber getPhone() {
          return phone ;
     public PhoneNumber getFax() {
          return fax;
    public String getName() {
        return fullname ;
    public void setName(String name) {
        this.fullname      = name;
    public String toString() {
        return getName();
}[4]. LocationTest.java
package test.temp;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.*;
import javax.swing.event.*;
public class LocationTest extends JPanel implements ChangeListener
    Ellipse2D.Double ball;
    Line2D.Double    line;
    JSlider          translate;
    double           lastTheta = 0;
    public void stateChanged(ChangeEvent e)
        JSlider slider = (JSlider)e.getSource();
        String name = slider.getName();
        int value = slider.getValue();
        if(name.equals("rotation"))
            tilt(Math.toRadians(value));
        else if(name.equals("translate"))
            moveBall(value);
        repaint();
    protected void paintComponent(Graphics g)
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        if(ball == null)
            initGeom();
        g2.setPaint(Color.green.darker());
        g2.draw(line);
        g2.setPaint(Color.red);
        g2.fill(ball);
    private void initGeom()
        int w = getWidth();
        int h = getHeight();
        int DIA = 30;
        int padFromEnd = 5;
        line = new Line2D.Double(w/4, h*15/16, w*3/4, h*15/16);
        double x = line.x2 - padFromEnd - DIA;
        double y = line.y2 - DIA;
        ball = new Ellipse2D.Double(x, y, DIA, DIA);
        // update translate slider values
        int max = (int)line.getP1().distance(line.getP2());
        translate.setMaximum(max);
        translate.setValue(max-padFromEnd);
    private void tilt(double theta)
        // rotate line from left end
        Point2D pivot = line.getP1();
        double lineLength = pivot.distance(line.getP2());
        Point2D.Double p2 = new Point2D.Double();
        p2.x = pivot.getX() + lineLength*Math.cos(theta);
        p2.y = pivot.getY() + lineLength*Math.sin(theta);
        line.setLine(pivot, p2);
        // find angle from pivot to ball center relative to line
        // ie, ball center -> pivot -> line end
        double cx = ball.getCenterX();
        double cy = ball.getCenterY();
        double pivotToCenter = pivot.distance(cx, cy);
        // angle of ball to horizon
        double dy = cy - pivot.getY();
        double dx = cx - pivot.getX();
        // relative angle phi = ball_to_horizon - last line_to_horizon
        double phi = Math.atan2(dy, dx) - lastTheta;
        // rotate ball from pivot
        double x = pivot.getX() + pivotToCenter*Math.cos(theta+phi);
        double y = pivot.getY() + pivotToCenter*Math.sin(theta+phi);
        ball.setFrameFromCenter(x, y, x+ball.width/2, y+ball.height/2);
        lastTheta = theta; // save theta for next time
    private void moveBall(int distance)
        Point2D pivot = line.getP1();
        // ball touches line at distance from pivot
        double contactX = pivot.getX() + distance*Math.cos(lastTheta);
        double contactY = pivot.getY() + distance*Math.sin(lastTheta);
        // find new center location of ball
        // angle lambda = lastTheta - 90 degrees (anti-clockwise)
        double lambda = lastTheta - Math.PI/2;
        double x = contactX + (ball.width/2)*Math.cos(lambda);
        double y = contactY + (ball.height/2)*Math.sin(lambda);
        ball.setFrameFromCenter(x, y, x+ball.width/2, y+ball.height/2);
    JPanel getControls()
        JSlider rotate = getSlider("rotation angle", "rotation", -90, 0, 0, 5, 15);
        translate = getSlider("distance from end", "translate", 0, 100, 100,25, 50);
        JPanel panel = new JPanel(new GridLayout(0,1));
        panel.add(rotate);
        panel.add(translate);
        return panel;
    private JSlider getSlider(String title, String name, int min, int max,
                              int value, int minorSpace, int majorSpace)
        JSlider slider = new JSlider(JSlider.HORIZONTAL, min, max, value);
        slider.setBorder(BorderFactory.createTitledBorder(title));
        slider.setName(name);
        slider.setPaintTicks(true);
        slider.setMinorTickSpacing(minorSpace);
        slider.setMajorTickSpacing(majorSpace);
        slider.setPaintLabels(true);
        slider.addChangeListener(this);
        return slider;
}OK, My questions are:
[1]. what I generated XML by XSTream is very complicated, especially for object LocationTest, Can we make it as simple as others such as Person object??
[2]. after I run it, LocationTest will popup and a red ball in a panel will dsiplay, after I change red ball's position, I hope to persist it to xml, then when I read it back, I hope to get same picture, ie, red ball stiil in old position, How to do that??
Thanks a lot!!

Positive feedback? Then please take this in a positive way: if you want to work on persisting Java objects into XML, then GUI programming is irrelevant to that goal. The 1,000 lines of code you posted there appeared to me to have a whole lot of GUI code in it. You should produce a smaller (much smaller) example of what you want to do. Calling the working code from your GUI program should come later.

Parse of a xml file to an java object model

Hello,
I'm trying to do a program that receive an xml file and ought to create all the neccesary java objects according to the content of the parsed xml file.
I've all the class created for all the objects that could be present into the xml and the idea is to go down in the tree of nodes recursively until it returns nodes more simple. Then, I create the last object and while I come back of the recursively calls, I create the objects more complex until I reached to the main object.
Until now, I have part of this code, that is the one wich have to parse the parts of the xml.
public static void readFile(String root){
          DocumentBuilderFactory factory = DocumentBuilderFactory
               .newInstance();
          try {
               DocumentBuilder builder = factory.newDocumentBuilder();
               Scanner scanner = new Scanner(new File(root)).useDelimiter("\\Z");
               String contents = scanner.next();
               scanner.close();
               Document document = builder.parse(new ByteArrayInputStream(contents.getBytes()));
               Node node = null;
               NodeList nodes = null;
               Element element = document.getDocumentElement();
               System.out.println(element.getNodeName());
               NodeList subNodes;
               NamedNodeMap attributes;
               //if (element.hasAttributes())
               visitNodes(element);
          } catch (ParserConfigurationException e) {
               e.printStackTrace();
          } catch (SAXException e) {
               e.printStackTrace();
          } catch (IOException e) {
               e.printStackTrace();
     private static void visitNodes (Node node){
          for(Node childNode = node.getFirstChild(); childNode!=null;){
               if (childNode.getNodeType() == childNode.DOCUMENT_NODE){
                    System.out.println("Document node Name " + childNode.getNodeName());
                    visitNodes(childNode);
               }else if (childNode.getNodeType() == childNode.ELEMENT_NODE){
                    System.out.println("Node Name " + childNode.getNodeName());
                    if (childNode.hasAttributes()){
                         visitAttributes(childNode.getAttributes());
                    if (childNode.hasChildNodes()){
                         visitNodes(childNode);
               }else if (childNode.getNodeType() == childNode.TEXT_NODE && !childNode.getNodeValue().contains("\n\t")){
                    System.out.println("Node value " + childNode.getNodeValue());
               Node nextChild = childNode.getNextSibling();
               childNode = nextChild;
     private static void visitAttributes(NamedNodeMap attributes){
          Node node;
          for(int i = 0; i < attributes.getLength(); i++){
               node = attributes.item(i);
               System.out.print(node.getNodeName() + " ");
               System.out.print(node.getNodeValue() + " ");
              }I don't know the use of childNodeType. For example, I expected that the XML tags with childs in his structure, enter by the option NODE_DOCUMENT and the tags without childs by the ELEMENT_NODE.
But the most important problem I've found are the nodes [#text] because after one ELEMENT_NODE I always found this node and when I ask if the node hasChilds, always returns true by this node.
Has any option to obtain this text value, that finally I want to display without doing other recursively call when I enter into the ELEMENT_NODE option?
When one Node is of type DOCUMENT_NODE or DOCUMENT_COMMENT? My program always enter by the ELEMENT_NODE type
Have you any other suggestions? All the help or idea will be well received.
Thanks for all.

Hello again,
My native language is Spanish and sorry by my English I attemp write as better I can, using my own knowledge and the google traductor.
I have solved my initial problem with the xml parser.
Firstly, I read the complete XML file, validated previously.
The code I've used is this:
public static String readCompleteFile (String root){
          String content = "";
          try {
               Scanner scanner = new Scanner(new File(root)).useDelimiter("\\Z");
               content = scanner.next();
               scanner.close();
          } catch (IOException e) {
               e.printStackTrace();
          return content;
     }Now, I've the file in memory and I hope I can explain me better.
I can receive different types of XML that could be or not partly equals.
For this purpose I've created an external jar library with all the possible objects contained in my xml files.
Each one of this objects depend on other, until found leaf nodes.
For example, If I receive one xml with a scheme like the next:
<Person>
    <Name>Juliet</Name>
    <Father Age="30r">Peter</Father>
    <Mother age="29">Theresa</Mother>
    <Brother>
    </Brother>
    <Education>
        <School>
        </school>
    </education>
</person>
<person>
</person>The first class, which initializes the parse, should selecting all the person tags into the file and treat them one by one. This means that for each person tag found, I must to call each subobject wich appears in the tag. using as parameter his own part of the tag and so on until you reach a node that has no more than values and or attributes. When the last node is completed I'm going to go back for completing the parent objects until I return to the original object. Then I'll have all the XML in java objects.
The method that I must implement as constructor in every object is similar to this:
public class Person{
final String[] SUBOBJETOS = {"Father", "Mother", "Brothers", "Education"};
private String name;
     private Father father;
     private Mother mother;
     private ArrayList brothers;
     private Education education;
     public Person(String xml){
       XmlUtil utilXml = new XmlUtil();
          String xmlFather = utilXml.textBetweenXmlTags(xml, SUBOBJETOS[0]);
          String xmlMother = utilXml.textBetweenXmlTags(xml, SUBOBJETOS[1]);
          String xmlBrothers = utilXml.textBetweenMultipleXmlTags(xml, SUBOBJETOS[2]);
          String xmlEducation = utilXml.textBetweenXmlTags(xml, SUBOBJETOS[3]);
          if (!xmlFather.equals("")){
               this.setFather(new Father(xmlFather));
          if (!xmlMother.equals("")){
               this.setMother(new Father(xmlMother));
          if (!xmlBrothers.equals("")){
            ArrayList aux = new ArrayList();
            String xmlBrother;
            while xmlBrothers != null && !xmlBrothers.equals("")){
              xmlBrother = utilXml.textBetweenXmlTags(xmlBrothers, SUBOBJETOS[2]);
              aux.add(new Brother(xmlBrother);
              xmlBrothers = utilXml.removeTagTreated(xmlBrothers, SUBOBJETOS[2]);
            this.setBrothers(aux);
          if (!xmlEducation.equals("")){
               this.setEducation(new Father(xmlEducation));
}If the object is a leaf object, the constructor will be like this:
public class Mother {
     //Elements
     private String name;
     private String age;
     public Mother(String xml){
          XmlUtil utilXml = new XmlUtil();
          HashMap objects = utilXml.parsearString(xml);
          ArraysList objectsList = new ArrayList();
          String[] Object = new String[2];
          this.setName((String)objects.get("Mother"));
          if (objects.get("attributes")!= null){
               objectsList = objects.get("attributes");
               for (int i = 0; i < objectsList.size();i++){
                 Object = objectsList.get(i);
                 if (object[0].equals("age"))
                   this.setAge(object[1]);
                 else
     }Each class will have its getter and setter but I do not have implemented in the examples.
Finally, the parser is as follows:
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;
public class XmlUtil {
     public HashMap parsearString(String contenido){
          HashMap objet = new HashMap();
          DocumentBuilderFactory factory;
          DocumentBuilder builder;
          Document document;
          try{
               if (content != null && !content.equals("")){
                    factory = DocumentBuilderFactory.newInstance();
                    builder = factory.newDocumentBuilder();
                    document = builder.parse(new ByteArrayInputStream(content.getBytes()));
                    object = visitNodes(document);
               }else{
                    object = null;
          } catch (ParserConfigurationException e) {
               e.printStackTrace();
               return null;
          } catch (SAXException e) {
               e.printStackTrace();
               return null;
          } catch (IOException e) {
               e.printStackTrace();
               return null;
          return object;
     private HashMap visitNodes (Node node){
          String nodeName = "";
          String nodeValue = "";
          ArrayList attributes = new ArrayList();
          HashMap object = new HashMap();
          Node childNode = node.getFirstChild();
          if (childNode.getNodeType() == Node.ELEMENT_NODE){
               nodeName = childNode.getNodeName();
               if (childNode.hasAttributes()){
                    attributes = visitAttributes(childNode.getAttributes());
               }else{
                    attributes = null;
               nodeValue = getNodeValue(childNode);
               object.put(nodeName, nodeValue);
               object.put("attributes", attributes);
          return object;
     private static String getNodeValue (Node node){
          if (node.hasChildNodes() && node.getFirstChild().getNodeType() == Node.TEXT_NODE && !node.getFirstChild().getNodeValue().contains("\n\t"))
               return node.getFirstChild().getNodeValue();
          else
               return "";
     private ArrayList visitAttributes(NamedNodeMap attributes){
          Node node;
          ArrayList ListAttributes = new ArrayList();
          String [] attribute = new String[2];
          for(int i = 0; i < attributes.getLength(); i++){
               atribute = new String[2];
               node = attributes.item(i);
               if (node.getNodeType() == Node.ATTRIBUTE_NODE){
                    attribute[0] = node.getNodeName();
                    attribute[1] = node.getNodeValue();
                    ListAttributes.add(attribute);
          return ListAttributes;
}This code functioning properly. However, as exist around 400 objects to the xml, I wanted to create a method for more easily invoking objects that are below other and that's what I can't get to do at the moment.
The code I use is:
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public class UtilClasses {
     public Object UtilClasses(String package, String object, String xml){
          try {
            Class class = Class.forName(package + "." + object);
            //parameter types for methods
            Class[] partypes = new Class[]{Object.class};
            //Create method object . methodname and parameter types
            Method meth = class.getMethod(object, partypes);
            //parameter types for constructor
            Class[] constrpartypes = new Class[]{String.class};
            //Create constructor object . parameter types
            Constructor constr = claseObjeto.getConstructor(constrpartypes);
            //create instance
            Object obj = constr.newInstance(new String[]{xml});
            //Arguments to be passed into method
            Object[] arglist = new Object[]{xml};
            //invoke method!!
            String output = (String) meth.invoke(dummyto, arglist);
            System.out.println(output);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SecurityException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (InstantiationException e) {
            e.printStackTrace();
          return null;
     }This is an example obtained from the Internet that I've wanted modified to my needs. The problem is that when the class calls this method to invoke the constructor and does not fail, this does not do what I expect, because it creates an empty constructor. If not, the parent class gives a casting error.
I hope that now have been more clear my intentions and that no one has fallen asleep reading this lengthy explanation.
greetings.

How to retrieve the java object in a proxy service in osb -- Plz help

Hi all,
I have a singleton java class which runs whenever the weblogic server gets started and store the output in its object. I need to access this java object from a proxy service in osb.
We tried using java call out and retrieved that object but we couldn't know how to parse that object into XML.
We are not sure of using the java call out in osb to solve this purpose because whenever we use a java callout, that particular java code will run which is not the case of singleton class.
So kindly help us how to retrieve the java object which holds the output without running the java code every time because its already run and holding the output in its object.
Regards
Prabhu

here the doc http://download.oracle.com/docs/cd/E13159_01/osb/docs10gr3/userguide/context.html#wp1106656
but I guess you are already at the stage of getting a POJO in a first Java Callout and passing the POJO to a second Java Callout, which should then return it to OSB as a XMLObject.
My recommendation is to write a Java function which returns a XMLObject and uses a XMLCursor to populate it with the values of the POJO.
An XMLObject returned to the OSB is automatically transformed in a "XML" variable (which in reality is represented as a XMLObject in the Pipeline context)
Here some code sample:
http://www.javamonamour.org/2010/09/how-to-create-xmlobject-using-xmlcursor.html

JAVA Object Calling in VB

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