VO reference in extended CO

Hi,
I am extending a seeded CO to add some validations while employees apply for leaves in Absence Management(HRMS).
I got values of fields in my extended CO which are filled by employees like 'absence name', 'start_date' etc. by using pagecontext.getParameter().
I am struggling with the values which are populated on the page based on seeded VO. How can I refer these values in my extended CO, For e.g- the employee number which gets populated on the page by some seeded VO
Thanks,
Saurabh

Hi Saurabh,
Use below code
OAApplicationModule am= pageContext.getApplicationModule(webBean);
OAViewObject spupVo= (OAViewObject)am.findViewObject("SpecialInformationDetailsVO1");
RowSetIterator spupvorow=spupVo.findRowSetIterator("xxwhospupdateRSI");
if(spupvorow!=null){
spupvorow.closeRowSetIterator();
spupvorow=spupVo.createRowSetIterator("xxwhospupdateRSI");
oracle.jbo.Row sprow;
while(spupvorow.hasNext()){
sprow=spupvorow.next();
sprow.getAttribute("attribute name that u wanted");
If you have only one record in the VO then no need of creating Rowsetiterator. you can directly get the current record into sprow.
Regards
jyothi

Similar Messages

References when extending class

I have a general question about extending a class.
If I have
public class B extends A
does Java create a reference to A and B?
Imagine I call a method of A with super from a method of B, this method is not static, so I must have a reference, I think.
Thanks Caroline

If a class B is a subclass of A, the class A is instantiated when B is instantiated.
class A{
A(){;}// default constructor of A
class B extends A{ // default constructor of B
B(){
super();// A is instantiated
}(The reference to B already refers to A.)

Weak, soft and Phantom references

I have got some confusions about reference types in java. These are:-
1. How we create weak and soft references! Are they predefined classes and we extend them, or they are interfaces and we implement them, or they are the concepts we implement by following any particular pattern.
or the references which are gone out of scope are considered as weak references.
2. can we change the type of reference dynamically! as JVM does it.
for eg:-
While the data objects are actually in use (or they are in scope) they are immune because they are strongly referenced by the display windows, once you move to look at something else (or they go out of scope) they become eligable for removal.
3. There is one set of problem I am facing, could that be resolved by weak or soft references.
"I set variables at session level(if they are needed at more than one page."
"At the last page I remove it from session."
"If for example there are 4 page sequence, and user quits after three steps, then the garbage variables are left in the session."
"if I make them as weak reference(or soft reference) then would it be a solution. or will it increase any potential risk of loosing the variables in between the process."
"or is there any way out for my problem using ref package, or it is used only for special purposes, not for a senario like this."
"or I am bound to use request level instead of session level, in these type of problems(which I am presently doing to solve this problem, but in this case I have to to set same attribute 3 times.)"
please comment.
4. What happens when we create an instance of reference queue.
-->does it give us a reference to the main queue that is used by garbage collector. when destroying objects out of scope.
that is garbage collector removes the reference of from the object and makes it point to queue element.
--> or when object goes out of scope, at that time only the reference is removed from the object and is made to point to queue element.
--> and when we do obj=null; at that time also obj reference is made to point to queue element.
please comment. I am confused about how java handles references.
5. does reference queue takes all the junked references.
if yes!
then for eg. we are using a background thread and doing some work when instance of class A is cleared, and doing some other work when instance of class B is cleared up by garbage collector.
queue.remove will return the junked reference, now how will we be determining which object is junked, instance of class A or class B. As reference of object is junked we can't use instanceOf operator.
please comment.
Thanks.

I find the documentation a bit opaque myself.
You create, say, a Weak reference by creating an object of class WeakReference, or a subclass of same. The object referenced (the referent) is a separate object which you pass in the WeakReference's constructor.
As long as the referent exist then calling get on the WeakReference object will return it. Once you call get and put the resulting reference in an object you have a hard reference and you know that the referent won't disappear until you let go of it.
If the referent has been disposed of then get returns null.
Sometimes you want to do extra cleaning up when a reference is cleared. Then you need to subclass the Reference class you are using to add indentifying information about the object that just disappeared. Obviously this can't be a reference to the object itself, that would be a "Hard" reference and would prevent the object being cleared.
You then create a ReferenceQueue, which is an ordinary object you own. The Reference objects have a reference to this queue. What happens is the the GC, when it clears one of these Reference objects, adds the Reference to the queue it references. You run a background thread which takes these cleared references from the queue and, using the extra information you added when you subclassed them, does whatever cleaning up you need to do. A typical example is that you have a Map, with the Reference objects as values. Each reference is extended to store the key, so that the cleanup will remove cleared references from the map.
No, it's not suitable for session objects, because you can't depend on the object still being arround. You can only rely on session timeout. It's a basic problem with web services that you never really know if the user has gone away and abandoned you.

How to extend idocs

hi gurus
      this is phaneendra i know how to extend the idoc
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can any body send me the code required for this in inbound and
in outbound dont send that present in arvind nagpal book that already i know
best regards
phaneendra punukollu
<removed_by_moderator>
Edited by: Julius Bussche on Jul 27, 2008 8:18 PM

Hi Phaneendra.
I would like to suggest a few references,
[SDN - Reference for Extending an existing IDOC|How to extend an existing IDOC!;
[SDN - Reference - Extending IDOC step by step|How to extend an IDOC step by step;
[SDN - Reference for populating segments of IDOC|How to populate IDOC segments...;
[SDN - Reference for Problem while Extending the HR IDOCS|Problem while Extending the HR IDOCS;
[SDN - Reference for Segments getting suppressed in Extended Idoc for Customer (change pointes) |Segments getting suppressed in Extended Idoc for Customer( change pointes);
[SDN - Reference for Setting attributes for segment types in IDOCS|Setting attributes for segment types in IDOCS;
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Good Luck & Regards.
Harsh Dave

TOTAL AND EXTRACTS IN TMG

hi experts,
while going through the postings in forums regarding
events in table maint. generator I came across the terms
extracts and total . Can anybody please explian to me what is this extract and total?
regards
pankaj

Hi Pankaj.
I would like to suggest a couple of references,
[SAP HELP Library - Standard Reference for Converting the Data Containers TOTAL and EXTRACT|http://help.sap.com/saphelp_nw04/helpdata/en/33/96613cb44b6c4de10000000a11405a/content.htm]
[SAP HELP Library - Standard Reference for Extended Table Maintenance Events - Before Saving the Data in the Database - TOTAL and EXTRACT|http://help.sap.com/saphelp_nw04/helpdata/en/91/ca9f0ba9d111d1a5690000e82deaaa/frameset.htm]
[SDN - Reference - Events in Table Maintenance - Issue - TOTAL and EXTRACT|Problem: Events in Table Maintenance;
[SDN - Reference - Events in table maintenance generator - Table Total and Extract for getting the table records|events in table maintenance generator;
Hope that's usefull.
Good Luck & Regards.
Harsh Dave

Finalize Memory Issues (A Horrible Lesson)

Im working on a project where I have to create and analyze an insane number of binary trees.
The program takes a node size and when n=13 it makes 700,000 trees and when
n=16 it makes over 30 million.
I know that with 2gb of ram I could do n=16 because 2 days ago I ran it successfully.
However, yesterday I could barely run n=13.
After 6 hours of frustration the netbeans memory profiler gave some insight.
I had overridden the finalize method yesterday with only an integer increment (to track node creation as part of the project).
public class Node{
public void finalize(){
FINALIZED++;
static int FINALIZED;
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project.Node ... live objects ~10 million ... 220 MB
Object[] ... live objects 3 ... 50 MB
project.Node is my class and comes to about 24 bytes per object which is about right (it hold 3 references and a byte).
the Object[] are the 3 arrays holding my trees.
But where did this "Finalizer" class come from? It has a lot of overhead (relative to my object).
final class Finalizer extends FinalReference {
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public class ReferenceQueue<T> {
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Why would overriding a method create this new object?
Can anyone clear up what is going on?

jschell wrote:
You already know that you have one for each live object.
The only point of using finalize is for GC. So it must be adding that for use by the GC.
Other than that most of what the VM does is done by java. This is just some more functionality in terms of that.
If you want to know specifically what it does you can ask in the JVM forum (I believe a vm implementor frequents that forum) or dig into the source yourself.You are right. That is all there is to it.
I took a free moment and wrote a demo class and learned how to insert a profile point in NetBeans.
My results are:
java.lang.ref.Finalizer ... instances: 500,014 ... size: 16,000,448 ... (32 bytes each)
memtest.Main ... instances: 500,000 ... size: 8,000,000 ... (16 bytes each)
When you override finalize() you add a 32 byte overhead per object.
Matter resolved! Thanks.
import java.util.*;
public class Main {
public static void main(String[] args){
     int size = 500000;
     List list = new ArrayList(size);
     Random r = new Random();
     for(int i = 0; i < size; i++){
     list.add(new Main(r.nextLong()));
     // insert heap dump profiling point
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public Main(long number){
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public void finalize(){
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     static int count;
}

Complaints Routing how to do it.

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I'm assuming that your post shows a Windows Form designed to look like a command prompt window?
Since you are asking about modifying the behavior of a TextBox when it is disabled, you should read up on how to extend the TextBox class to produce the behavior you want.
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https://social.msdn.microsoft.com/Forums/vstudio/en-US/143646f2-8b66-4985-b317-a0ebbc3fb382/textbox-backcolor-change-onfocus-and-lostfocus?forum=vbgeneral
https://social.msdn.microsoft.com/Forums/windows/en-US/2b096136-7063-4334-a445-a3f1b05b71d8/tutorial-on-creating-controls?forum=winformsdesigner

New phone only rings 4 times!!!!

Hi, as a newbie and phillistine, hope you guys can help. Bought new Nokia 2680 slide at weekend, but it will only ring 4 times before going to message service. I have not yet been able to answer a single call!!! This will cost me a fortune in calling people back!
I have read the manual 3 times and cannot find any reference to extending the ringing.
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Base64 and iFS

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TIA
Alexandre

If you simply need to add some custom attributes to PDF files you can define custom content type (see "iFS. Developer Reference. Extending Content Types and Attributes".
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Changing parent Nodes

I have searched for numerous hours on the forums for the answer to my question and I did not find it therefore I am asking it
I am creating a program that takes TEXT input from a user as to what should be in a family tree. However the input is randomly put in and I"m having large problems changing between the parents once they are in the list and then either seeing what children have already been inputted and also being able to add children, and then change to a different parent. I didn't want the list of the children to print out automatically when changing to a parent, the program completely waits on user commands, typically adding a parent and child. Grand-children are not included in this program.
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Tah

OK. So you have some kind of a node object with obj, prev, next references.
This allows you to create a nice linked list of objects, but I don't see a tree. In other words, I don't see how you represent parent/child relationships.
If I were doing it, I would do one of the following:
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Finally, I don't really know what kind of a user interface you are creating.
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Publishing Diagrams

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Benoit,
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Architecture Design Question: Integrating AMF and HTTP/REST

We have an app that is consuming services from blazeds over an AMF channel. This approach replaced an earlier implementation that consumed SOAP services. This took place before I inherited the project. Apparently, there were tremendous performance gains in switching to AMF and we don't want to abandon it.
Now we are creating a new RESTful, HTTP Request/Response-based service layer that will be shared across several organizations and the idea is that anyone can then write clients to grab our data (as well as data from other repositories in other organizations that implement the common service API). The services include output handlers that are designed to return data in various formats that the user might request (e.g., csv, xml, JSON, AMF???).
My question is about how to keep the performance benefits of AMF for our Flex client as the new services move to the HTTP/REST architecture.
Our current thinking is to add the blaze jars to the new webapp and use the message broker to route as you normally would, but the destination would essentially be an adapter class that can take the AMF requests and pass them on to the RESTful access points of our services, and then transform the response back to AMF.
I just started reading Shashank Tiwari's Professional BlazeDS and came across the chapter on using blaze as a server-side proxy. Is this a viable approach for what I am trying to do? I also see references to extending blaze by creating custom adapters. Is this the right track? I'm sure this is a common problem. I'm looking for a discussion on possible solutions. Andy ideas?

Hi,
In Lync server 2013 Stretched pools are not supported for the Front End, Edge, Mediation, and Director server roles. It need two Lync pools.
If one pool fail to connect, An administrator can declare an emergency and fail over the pool to the backup pool. That is done by using the:
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More details:
http://blog.avtex.com/2012/07/26/understanding-lync-2013-server-failover/
Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information
found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.
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Closing items as they fall out of a soft cache

I have the following simple cache interface and implementation:
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    void put(K key, V value);
public class SoftCache<K, V> implements Cache<K, V> {
    private Map<K, Reference<V>> storage = new HashMap<K, Reference<V>>(50);
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        return deref(storage.remove(key));
    private V deref(Reference<V> ref) {
        return ref == null ? null : ref.get();
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        storage.put(key, createReference(value));
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        return new SoftReference<V>(value);
}This much appears to work fine, but now I want to automatically call close() on all V values if they fall out of the cache.
I have tried using a ReferenceQueue and having another thread polling the reference queue, my problem is that when I call get() the referenced value is always null, and I can't figure out how to get a reference to it at this point.
Is there some way of getting a reference to the item before the GC clears the Reference, and thus give me a chance to call close() on the item before it is GCed?
I'm not fond of solving this by overriding finalize() on the V values themselves, as people often say not to rely on finalize() as the sole means for cleaning up, and I want to add a close() method to the cache such that after I call close(), I know that all values have been closed. If I simply add finalize() to V then it doesn't give me that, as it could be closed at any point after the reference becomes unreachable.

trejkaz wrote:
I think you're onto something with the container approach, but there is one thing preventing me from being happy with this solution as-is. Basically, callers need to know to hold onto the container. On the surface it would appear to be possible to do this:
myValue = cache.get(myKey).get();But in reality this would then mean nobody is referencing the container with a hard reference, and the JRE would occasionally collect it, causing it to clean up the contained value.Sorry, I don't get you here. What is the expression cache.get(myKey).get() supposed to do?
But... what if I had a way to hold onto a reference to a cleanup object from my items which are in the cache? I don't know if I can do this in a generic way, but if I did something like this...I'm not sure, but maybe here you're talking about the very same technique that I was trying to explain: putting a resource-object into the actual objects handed out to the clients of the cache. I was suggesting a fully generic approach where you could specify the type of the client-side object as well as the type of the resource-object. One yould simplify this a bit by creating an interface Cacheable:
import java.io.Closeable;
interface Cacheable
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interface Cache<K, V extends Cacheable> {
    V get(K key);
    V remove(K key);
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class SoftCache<K, V extends Cacheable> implements Cache<K, V> {
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        return deref(storage.get(key));
    public V remove(K key) {
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    private V deref(Reference<V> ref) {
        return ref == null ? null : ref.get();
    public void put(K key, V value) {
         doCleanup();
        storage.put(key, createReference(value));
     private void doCleanup() {
          Reference<? extends V> ref;
         while(null != (ref = queue.poll())) {
              CacheReference cacheRef = (CacheReference) ref;
              if(cacheRef.handle != null)
                    try {
                         cacheRef.handle.close();
                    } catch (IOException e) {
                         e.printStackTrace();
    protected Reference<V> createReference(V value) {
        return new CacheReference(value, queue);
    class CacheReference extends SoftReference<V> {
          CacheReference(V referent, ReferenceQueue<? super V> q) {
               super(referent, q);
               this.handle = referent.getResource();
          final Closeable handle;
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}

Eliminating type parameters used only for superclass information?

I have a class called BaseObject. I have another class called Reference. A
BaseObject has one canonical Reference that can be gotten and set. A Reference
is capable of pointing at a BaseObject subclass of a particular type and can
return the Class of that BaseObject subclass.
I'd like to genericize these classes so that if you create a reference and
assign it to an object, their types should line up. That is, a Reference that
points to a Banana should not be able to be assigned as a canonical reference to
a Cherry.
My goal is to express these type constraints once somewhere. I cannot seem to
achieve my goal.
Pass one, which looks OK at the outset:
public class BaseObject<T extends BaseObject> {
    public Reference<T> getReference() {
    public void setReference(final Reference<T> reference) {
public class Reference<T extends BaseObject> {
    public Class<T> getObjectType() {
}But that would mean that every subclass of BaseObject<T> would need to be
declared with a type parameter as well to permit further subclassing, right?
Like so:
public class Fruit<T extends Fruit> extends BaseObject<T> {
    // Note: T is not used in this class except to "pass it up" to BaseObject
public class Banana<T extends Banana> extends Fruit<T> {
    // Note: T is not used in this class except to "pass it up" to Fruit
    // Callers will have to say: new Banana<Banana>();
}That seems WEIRD to me. Is there any way to...to...hide the genericization of
the fundamental classes--BaseObject and Reference--without forcing the type
parameters to be propagated all the way down the subclass stack?
In other words, assuming a hierarchy of Object<--Fruit<--Banana, is there any
way to have Fruit and Banana not mention type parameters at all?
Thanks,
Laird

I'm up a creek here, aren't I?I think so. It's been a while since I complained
about the lack of 'self-types' in Java. 'Self-type'
actually means something different in other languages
(Scala for example) so just be aware of that.AH! Yes! That's exactly what I'm talking about. OK, knowing that I'm screwed helps a lot, actually. It lets me know where I can and cannot apply generics to solve problems.
I would envision:
class BaseObject<self>
// OR
class BaseObject<T extends self>The idea would be that self is what ever the
'current' class is. So if you used the first one,
the type of the class that extended BaseObject would
be assumed to be the parameteric type. The second
one would require that the parameter (if present at
time of variable of declaration is instantiation) be
at least as specific as the current extenstion of
BaseObject.Yes, exactly. This would be wildly helpful. Oh well.
Back to 1.4 syntax.
Cheers,
Laird

Obtaining numeric country identifier

hi,
using java.util.Locale i can get a list of all 2-letter country codes defined in ISO 3166 (via a static getISOCountries() method invocation). However, the ISO 3166 tables always list a numeric identifier as one of the columns e.g. 020 or 20 for Andorra. According to ISO documentation this numeric code identifies a physical territory, and the letters a country name (Thus when Germany reunified, it kept DE/DEU but changed from 280 to 276, while when Southern Rhodesia was renamed Zimbabwe it stayed 716 but changed from RH/RHO to ZW/ZWE).
my question is, using standard Java API, is there some way for me to obtain the numeric code associated with a 2-letter country code?
I'm trying to write an interface to Active Directory, and one of the attributes associated with an Active Directory account is corresponding to such numeric code value.
thanks in advance,
regards,
Greg

gayathri.kavi wrote:
hi,
getISOCountries() method returns an array of 2 letter numeric code for the country.No it doesn't. It does this:
Returns a list of all 2-letter country codes defined in ISO 3166.
Output looks like this:
AD
AE
AF
AG
AI
AL
AM
I don't see anything in the API that retrieves the numeric code. Perhaps it doesn't fully implement the standard? I'm really interested to see if anyone else has had this problem too. I suppose as a last ditch effort, you could map the codes yourself using the standard as a reference and extend Locale. There's only 242 of them =P
I suppose it's not good that the first google result for "java get iso numeric country code" is this thread...
Edited by: nclow on Jun 23, 2008 3:41 PM

VO reference in extended CO

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