How to Refresh View Link and Associations

hi all,
How can I Refresh my viewlink and Association.
Nani:)

Can you provide your use-case, your query seems to be very generic

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View Links and Associations

hi all,
What is the difference between view links which is based on associations and view links which is not based on associations?
yours,
Bassam

Hi,
associations is what you can use on the EO to resolve a relation between two EntityObjects. You can e.g use this in code to access parent or detail information.
ViewLinks provide you the same on the ViewObject layer. You can base a ViewLink on an association in which case you don't need to know about what actually the relation is build upon.
Frank

EJB Finder View Links and CMR

Hi,
Can someone please give me some input on the following warning in the JDeveloper online help!
"Warning: You cannot create an EJB finder view link that expresses the same relationship as a CMR."
I'm new to EJB, BC4J and JDeveloper. I created container managed entity beans with local interfaces only to represent my data and relationships. No problems with the mapping so far.
To test the beans I used Session Facades with remote interfaces and build a sample test client.
Now I thought I could create EJB Entity Facades, EJB Finder View Objects, EJB Finder View Links and EJB Application Modules to make use of the BC4J framework in order to speed up programming clients (JSP and JClient).
So I've started studying the JDeveloper online help (which seems to be very useful) and found the above mentioned warning.
Well, better a warning than nothing at all, but some more explanations would have been even better.
Is there no need to use view links with CMR?
How to achieve the same functionality (synchronizing two view objects in a master-detail-relationship) with CMR?
Do you know any examples? I couldn't find any examples using EJB entity facades in the "sample code" area on OTN.
Any comments about other (better) architectures are also welcome. Would it be better to use BMP entity beans in conjunction with BC4J?
Many thanks for your help!
Regards,
Eric

Steven,
thank you for your reply and suggestions - I'll count on that. If I find time I'll read this book. It seems to be very interesting.
For educational purposes I'd like to look at both persistence implementation strategies. I agree that it looks definitly easier to use entity objects. Certainly it's also performancewise a better choice.
Anyhow, could you give me some useful tips for cmp entity beans and finder view objects?
Is there something which works completely different if I use BC4J on top of it?
How to implement a master-detail relationship in JClient (Swing) for example?
What about writing an ejbfinder which doesn't return all, but all data where the foreign key is equal to a parameter passed to the finder method and use this as the source for a detail view object. This could be the primary key of the selected master. Well, I don't know whether this is doable. But that's what comes to my mind spontaneously.
Would this be a solution? I'm still thinking about the aforementioned warning in the online help regarding view links.
I guess the problem is that the foreign key is not part of the entity bean as it's not a cmp-field. Instead you have accessor methods to retrieve a related object or a collection of objects.
I'm sure my questions are not too complicated to answer. It's only hard for a beginner to get an overview.
I'm quite confident that I'll manage this if I give my best and get some help from knowledgeable people like you Steven.
Regards,
Eric

View Link and HGrid - Urgent

Hi,
The hierarchy in HGrid can be constructed using the view link and a view object.
If I want to associate a "Where" condition with the child rows of my "root Row", I need to relate the source view object with destination view object.
How do I independently associate a where clause with the child rows ?
I am working on this for a long time and finding nobody to help me on HGrid complexities.
Can anybody please help ? Does anybody suggest raising a TAR for this, to Oracle ?
Thanks,
Amit

Amit,
You would have to build runtime VL in that case, because only then you would be able to first set where clause of child VO and then get filtered rows by runtime VL.
--Mukul

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How to extend VO which is use in VIEW LINK and VL is created dynamically.

Hi All,
I wants to extend VO.
This VO is used in VIEW LINK.
This VL name set dynamically, conditionally in one of the controller of page.
i.e if some condition satisfied than xyz VL will use otherwise abc VL will use.
Now,
I have extend VO as well as VL and substitute both, but I am getting null value for some of the field and also I am not able to insert/update new value.
So,
I have created VORowImpl class file which extend VOROWImpl of seeded file and chage the row class of VO.xml file to new class. i.e. modified seeded .xml code and achieve what I want.
But Is this correct way ?
Is there any other way ?
--Tushar Topiwala

Hi pratap,
thanx for your reply.
intially i've done that also. i.e. extend only VO and substitute it but i'm getting null values in some field as well as nt able to insert/update new value.
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--tushar topiwala

Error with view link and ADF table Tree

Hello
( Note: View objects are created based on static data but not from database tables)
I created two view objects "SuiteViewObject" and "FamilyViewObject" which are based on static data( stored in collection) but not on database entity. A veiw link "SuiteFamilyViewLink" is created from the above two view objects. An ADFTreeTable is created from the above view objects and view link. When run the jspx page containing ADFTreeTable, following error is occured in the browser.
JBO-30003: The application pool (staticviewobjects.staticappLocal) failed to checkout an application module due to the following exception:
oracle.jbo.JboException: JBO-29000: Unexpected exception caught: oracle.jbo.InvalidOperException, msg=JBO-26016: Cannot set user query to view "FamilyViewObj2" because it is a destination in a view link
Any help on the above error message.?
Thanks in Advance
Kristi
Bangalore
Message was edited by:
user576892

Hello
The above error is coming becuase view link's SQL query expects tables. But in my case I dont have tables, view objects are created from static data source(collection).
How to create a view link from view objects which are created based on static data source(collection)?

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How to Refresh View Link and Associations

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