Selecting a subclass instances in JDOQL

Hello!
Suppose there are three classes: SubClass1, SubClass2 and their SuperClass.
and there's a query that was created on the SuperClass extent, i.e.
Query q = pm.newQuery( SuperClass.class );
Is it possible to use something like this in Kodo JDOQL:
(SubClass1) this == this
Can I expect this to return only instances of SubClass1 and not those of
SubClass2? If not, is there any other way I can specify the required
class in a JDOQL after a query has already been created over certain
(SuperClass) class?

Viktor Matic wrote:
If not, is there any other way I can specify the requiredTo answer myself, yes, use 'instanceof'.

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Subclass instance not created during runtime

Hi Experts,
For an existing standard class a subclass was created and during runtime the me object reference points to the subclass name there by allowing the subclass additional/custom methods to be triggered.
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Hello Srinivas,
I had put a breakpoint to debug in the subclass which was being invoked.
In the new system where the service pack has been applied I have put breakpoint in the same method but the subclass method is not being called.
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NO!!!
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Hi all,
What is the significance of assigning an instance of a subclass to a variable whose type is a superclass's type.
For eg. List list=new ArrayList();
If I do so is it possible to execute the methods of the subclass ?
regards
Anto Paul.

In addition, this is what polymorphism is all about:
abstract class Animal {
String name;
Animal(String name) {
    this.name = name;
public abstract void voice();
class Dog extends Animal {
Dog(String name) { super(name); }
public void voice() {
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class Cat extends Animal {
Cat(String name) { super(name); }
public void voice() {
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public class Polymorphism {
public static void main(String args[]) {
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      new Cat("Felix")
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Here, we are looping through an array of Animals. In fact, these are concrete subclasses of the abstract Animal class. In this simple example, you can see from the code that the animals array contains a dog and a cat. But we could even extend this to read in an arbitrary Animal object that had been serialized into a file. At compile time, the exact class of the serialized animal would not be known. But polymorphism occurs at runtime to ensure the correct voice() method is called.
For the List, or Map example, conisder this:
public SomeClass {
public HashMap map1 = new HashMap(); // this ties you to hashmap
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Cannot Select Correct SQL Instance to Upgrade During Install

Hello all,
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Balmukund Lakhani
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Method.invoke causes IllegalArgumentException with subclass instance

Is there a way to use an instance of a subclass when using reflection to invoke a method?
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// Foo.java
package junk;
public class Foo
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// Bar.java
package junk;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
public class Bar extends Foo
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        catch (InvocationTargetException e)
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Sorrry for the confusion. It's always the little things...
I neglected to use an instance of Foo to invoke the method.
See corrected code below:
// Bar.java
package junk;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
public class Bar extends Foo
    public void invokePrivateFooMethod(String methodName,
                                       Class[] paramTypes,
                                       Object[] paramValues)
        try
            Foo localF = new Foo();
            Class classToUse = localF.getClass();
            Method methodToUse = classToUse.getDeclaredMethod(methodName, paramTypes);
            methodToUse.setAccessible(true);    // override of private modifier
            // NOTE: Use localF, NOT classToUse!
            methodToUse.invoke(localF, paramValues);
        catch (IllegalAccessException e)
            e.printStackTrace();
        catch (NoSuchMethodException e)
            e.printStackTrace();
        catch (InvocationTargetException e)
            e.printStackTrace();
}

Cant select a specific instance of an application when running multiple

I am trying to write a script to launch multiple instances of chess.app, select computer vs. computer, and have it start playing. I am able to get it to either launch multiple versions of the app by via "do shell script", however when it begins to activate the chess app and select the appropriate objects, it always acts on the first instance of the application that was launched. Here is what I have so far:
set volume 0
repeat 3 times
do shell script "open -n /Applications/Chess.app"
tell (application "Chess") to activate
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key code 125
keystroke space
click button "Start" of sheet 1 of window 1
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You can use ps and grep from a shell script to find a list of all Chess processes, then extract just the PID with awk. From there, just tell System Events to bring the app to the front using the PID that was found, then start a new game. You can see an example below:
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delay delayBetweenKeyPresses
key code 125
delay delayBetweenKeyPresses
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delay delayBetweenKeyPresses
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GetSelectedIndex() to return position selected, not first instance?

Hi
I am having trouble getting the correct index from a JComboBox. My program's JComboBox stores duplicated entries.
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labelIndex = frame.labelsComboBox.getSelectedIndex();
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Instead of putting Strings in your combobox, put some other kind of Object which has a toString() method which returns the string you want to show. Then when the JComboBox code calls the equals() method (I think) to see which index matches, it will only find the correct one.import java.awt.*;
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Hi,
If your SharePoint environment supports InfoPath Forms, then you can customize the form and add rules to make the list items as read only when user A submits the form.
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Please vote or mark your question answered, if my reply helps you

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Select using different instances

I hope this is not off topic here:
How do I access different tables in different instances? I found anything in documentation.

Did u create DB link???
after creating dblinks it should be ok....
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Frank([email protected]):
I hope this is not off topic here:
How do I access different tables in different instances? I found anything in documentation.<HR></BLOCKQUOTE>
null

Flex: how to select each element/instance of a repeater

I'll explain my problem as brief as possible. I have a variable bandName, the value is String that i get through an API.
public function haalNaam(selectedChart:Object):String
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I made some screenshots to elaborate.
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2008 R2 Express Web Upgrade Failed: The selected SQL Server instance does not meet upgrade matrix requirements.

HI
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Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers

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Any Idea..??

Select instance of polymorphic vi at compile time

quick question:
I have a fairly significant labview project that i'm deploying to several compactRIOs. However, I have two possible configurations of that code. The difference between the two configurations is a single VI. That is, within my project, there's one VI that I replace with another (same connector pane) for the alternate configuration.
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Cheers.
Solved!
Go to Solution.

Keith_W wrote:
yamaeda, i'm unclear about what you're suggesting. are you suggesting that i use the VI scripting VIs to programmatically edit the VI to switch which state is enabled by using a VI that runs before building, but as part of the build process?
The Conditional disable seems to work like a script at compile time. As you stated your problem it sounds like you wanted 2 builds anyway, and this would enable one of the conditional frames when building the exe.
/Y
LabVIEW 8.2 - 2014
"Only dead fish swim downstream" - "My life for Kudos!" - "Dumb people repeat old mistakes - smart ones create new ones."
G# - Free award winning reference based OOP for LV

Selecting a subclass instances in JDOQL

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