Strange behaviour of JBuilder Plug-In with Inner class

Hi, I'm using the Kodo 2.5.2 Plug-In with JBuilder 8. I have an inner
persistent class. It seems that it is necessary to have a zero length file
named EnclosingClass$InnerClass.java for the build process to work, since
if I delete this file and run the application it throws an exception
saying that the Inner class has not an specified field which it really
has. I don't know if this is a bug of the Kodo implementation or of the
JBuilder Plug-In.
Thanks for any help.
Jaime.

This is one of the limitations of the JBuilder plugin. Hopefully it
will be resolved in the next iteration of our plugins for 3.x.
Jaime De La Jara F. wrote:
Hi, I'm using the Kodo 2.5.2 Plug-In with JBuilder 8. I have an inner
persistent class. It seems that it is necessary to have a zero length file
named EnclosingClass$InnerClass.java for the build process to work, since
if I delete this file and run the application it throws an exception
saying that the Inner class has not an specified field which it really
has. I don't know if this is a bug of the Kodo implementation or of the
JBuilder Plug-In.
Thanks for any help.
Jaime.
Steve Kim
[email protected]
SolarMetric Inc.
http://www.solarmetric.com

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Hi everyone,
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I think that I am using the Java plugin ( Its a computer in college so I'm not certain but I just tried running an applet from the Swing tutorial and it worked)
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import java.applet.*;
import javax.swing.JApplet;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.awt.geom.*;
import javax.swing.*;
import java.awt.image.*;
import java.util.StringTokenizer;
import java.net.*;
public class Rotary extends JApplet implements ActionListener, MouseListener
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private JTextArea txtTest; //temp
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private animateArea wheelPanel;
private JButton btPlay, btStop;
private BoxLayout layout;
private JPanel btPanel;
public Image wheel;
public int currentSector;
public String members[];
public int [][]coordsX, coordsY; //stores sector no. and x or y coordinates for that point
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public Polygon polySector1,polySector2,polySector3, polySector4, polySector5,polySector6,polySector7,polySector8,polySector9,polySector10,
polySector11,polySector12,polySector13,polySector14,polySector15,polySector16,polySector17,polySector18,polySector19,polySector20,
polySector21,polySector22,polySector23,polySector24,polySector25,polySector26,polySector27,polySector28,polySector29,polySector30,
polySector31,polySector32,polySector33,polySector34,polySector35,polySector36,polySector37,polySector38,polySector39,polySector40,
polySector41,polySector42,polySector43,polySector44,polySector45,polySector46,polySector47,polySector48;
public Polygon polySectors[]={polySector1,polySector2,polySector3, polySector4, polySector5,polySector6,polySector7,polySector8,polySector9,polySector10,
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members = new String[TOTAL_SECTORS];
coordsX= new int[TOTAL_SECTORS][4];
coordsY= new int[TOTAL_SECTORS][4];
currentSector = -1;
rotating = true;
transform = new AffineTransform();
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wheelPanel = new animateArea(); //create a canvas where the animation will be displayed
wheelPanel.setSize(600,580);
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btPanel.setLayout(new BoxLayout(btPanel,BoxLayout.Y_AXIS));
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btPanel.setMaximumSize(new Dimension(30,580));
btPanel.setMinimumSize(new Dimension(30,580));
btPlay = new JButton("Play");
btStop = new JButton("Stop");
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btPanel.add(btPlay);
btPanel.add(btStop);
// btPanel.add(txtTest); //temp
c = getContentPane();
layout = new BoxLayout(c,layout.X_AXIS);
c.setLayout(layout);
c.add(wheelPanel); //add panel and animate canvas to the applet
c.add(btPanel);
wheel = getImage(getDocumentBase(),"rotary2.gif");
getParameters();
for(int k = 0; k <TOTAL_SECTORS; k++)
polySectors[k] = new Polygon();
for(int n= 0; n<4; n++)
polySectors[k].addPoint(coordsX[k][n],coordsY[k][n]);
btPlay.addActionListener(this);
btStop.addActionListener(this);
wheelPanel.addMouseListener(this);
startAnimation();
public void mouseClicked(MouseEvent e)
if (rotating == false) //user can only hightlight a sector when wheel is not rotating
for(int h= 0; h<TOTAL_SECTORS; h++)
if(polySectors[h].contains(e.getX(),e.getY()))
currentSector = h;
wheelPanel.repaint();
email();
public void mouseExited(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
public void mouseReleased(MouseEvent e){}
public void mousePressed(MouseEvent e){}
public void email()
try
URL rotaryMail = new URL("mailto:[email protected]");
getAppletContext().showDocument(rotaryMail);
catch(MalformedURLException mue)
System.out.println("bad url!");
public void getParameters()
StringTokenizer stSector;
String parCoords;
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{               //put member names in applet parameter list into an array
members[i] = getParameter("member"+i);
//separate coordinate string and store coordinates in 2 arrays
parCoords=getParameter("sector"+i);
stSector = new StringTokenizer(parCoords, ",");
for(int j = 0; j<4; j++)
coordsX[i][j] = Integer.parseInt(stSector.nextToken());
coordsY[i][j] = Integer.parseInt(stSector.nextToken());
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wheelPanel.repaint(); //repaint when timer event occurs
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stopAnimation();
else if(e.getActionCommand()=="Play")
startAnimation();
public void startAnimation()
if(timer == null)
timer = new Timer(delay,this);
timer.start();
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Thanks so much for your help!

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file C:\MyJava\Test\A:
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<?xml version="1.0"?>
<jdo>
<package name="com.globalrefund.jdo.mna">
<class name="Parameter$Syspar" objectid-class="SysparId">
<extension vendor-name="kodo" key="table" value="syspar"/>
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Generating an application id for type "class
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Regards,
Bernhard

1.) appidtool does not work for this inner class, I get this stack traceThis is a bug. It will be corrected in the final release of 2.3, due out
Real Soon Now. Thanks for catching this!
2.) I tried to use a hand coded inner class as ID class, but id did not work
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Exception in thread "main" java.lang.NoSuchMethodError:
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constructor, and so the application id class will violoate the JDO constraint
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One to many mapping - strange behaviour

I noticed a strange behaviour which happens when working with 1 to n
relationships. Maybe the behaviour is intended by the JDO specification or
maybe I haven't set the proper kodo properties to make it work.
Here's the problem:
I have the following two classes wich I map to a database table each (using
datastore identity):
class Person
private String name;
private Collection cars;
// setters and getters
class Car
private String model;
private Person owner;
// setters and getters
When I have a persistent car object and I assign it to a persistent person
like this:
car.setOwner(person);
and I immediately retrieve all cars of the person by calling:
Collection c = person.getCars()
the car ist not in the collection as I would expect it to be. In my opinion
JDO should make sure the car is added to the collection.
Even after I commit the whole transaction the car is still not in the
collection.
To make the car appear in the collection I have to create a new
PersistentManager (when using javax.jdo.option.Optimistic=true) and refetch
the person object again.
Can anyone enlighten me on this problem?
Thank you!
Donat Hauser
[email protected]
mapping.jdo
<class name="Person">
<extension vendor-name="kodo" key="table" value="PERSON"/>
<extension vendor-name="kodo" key="pk-column" value="ID"/>
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
<field name="name">
<extension vendor-name="kodo" key="data-column"
value="NAME"/>
</field>
<field name="cars">
<collection element-type="Car"/>
<extension vendor-name="kodo" key="inverse" value="owner"/>
</field>
</class>
<class name="Car">
<extension vendor-name="kodo" key="table" value="CAR"/>
<extension vendor-name="kodo" key="pk-column" value="ID"/>
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
<field name="model">
<extension vendor-name="kodo" key="data-column"
value="MODEL"/>
</field>
<field name="owner">
<extension vendor-name="kodo" key="data-column"
value="OWNER"/>
</field>
</class>

Donat,
This is a bit of a philosophical question. One of the goals of JDO is to
be as closely aligned to the Java language as possible, and Java has no
concept of a shared relation. So, we do not perform any work to ensure
that relations get 'magically' set on both sides. Instead, you must set
both sides of the business relation yourself in Java code.
The result of this is that code that you write will behave the same
regardless of whether or not the objects are persistent. So, you can write
test cases or non-persistent parts of your application and trust that the
code will behave the same in both instances.
-Fred
In article <[email protected]>, M__ller Alfons wrote:
>
I noticed a strange behaviour which happens when working with 1 to n
relationships. Maybe the behaviour is intended by the JDO specification or
maybe I haven't set the proper kodo properties to make it work.
Here's the problem:
I have the following two classes wich I map to a database table each (using
datastore identity):
class Person
private String name;
private Collection cars;
// setters and getters
class Car
private String model;
private Person owner;
// setters and getters
When I have a persistent car object and I assign it to a persistent person
like this:
car.setOwner(person);
and I immediately retrieve all cars of the person by calling:
Collection c = person.getCars()
the car ist not in the collection as I would expect it to be. In my opinion
JDO should make sure the car is added to the collection.
Even after I commit the whole transaction the car is still not in the
collection.
To make the car appear in the collection I have to create a new
PersistentManager (when using javax.jdo.option.Optimistic=true) and refetch
the person object again.
Can anyone enlighten me on this problem?
Thank you!
Donat Hauser
[email protected]
mapping.jdo
<class name="Person">
<extension vendor-name="kodo" key="table" value="PERSON"/>
<extension vendor-name="kodo" key="pk-column" value="ID"/>
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
<field name="name">
<extension vendor-name="kodo" key="data-column"
value="NAME"/>
</field>
<field name="cars">
<collection element-type="Car"/>
<extension vendor-name="kodo" key="inverse" value="owner"/>
</field>
</class>
<class name="Car">
<extension vendor-name="kodo" key="table" value="CAR"/>
<extension vendor-name="kodo" key="pk-column" value="ID"/>
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
<field name="model">
<extension vendor-name="kodo" key="data-column"
value="MODEL"/>
</field>
<field name="owner">
<extension vendor-name="kodo" key="data-column"
value="OWNER"/>
</field>
</class>
Fred Lucas
SolarMetric Inc.
202-595-2064 x1122
http://www.solarmetric.com

Servicegen and inner classes

I have a class that contains a public non-static inner class. Even though the inner class has a public default contructor, servicegen claims it can't find the constructor.
Is this a servicegen bug or limitation with inner classes?

Hi Ron,
Sounds like a bug. Could you supply a short example?
Thanks,
Bruce
Ron Mak wrote:
I have a class that contains a public non-static inner class. Even though the inner class has a public default contructor, servicegen claims it can't find the constructor.
Is this a servicegen bug or limitation with inner classes?

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