Enable/Disable Column in a Advanced Bean Table

Question

Hi,
I have 2 columns that needs to be enabled/disabled on a standard oa page PO Lines summary page.
I went through couple of blogs/forums and found 2 approaches :-
Approach 1
1) Extended the standard VO POLinesMerge.
2) Added a attribute column DeriveDisplayFlag of type VARCHAR2 . This call a database function and will return Y or N
3) Added a attribute of type ShowAdditionalColumn boolean. the get method of this attribute returns TRUE if DeriveDisplayFlag is 'Y' otherwise returns FALSE.
4) created a substitution for the custom VO
5) uploaded the substitution to mds.
6) copied the xml/class files to $JAVA_TOP/..
7) Bounced entire middle tier
8) using personalization, entered a SPEL command on the rendered property. I know rendered will hide/show the column but for time being I just want this to work.
But this fails :-
oracle.apps.fnd.framework.OAException: Message not found. Application: FND, Message Name: FND_VIEWOBJECT_NOT_FOUND. Tokens: VONAME = XXPBPoLinesMergeVO; APPLICATION_MODULE = oracle.apps.po.document.server.DocumentAM;
I am not aware how to get around this. Can someone help please?
Approach 2
1) steps 1 to 6 from Approach 1.
2) trying to extend controller class OrderLinesTableRNCO. But have couple of questions. This iis a advanced bean table so how should i reference individual record and the column that i need to disable/enable ?
Conceptual questions
Also, when i am entering a new record at what point in time the 2 new attribute will derive its value? the 2 attributes are dependent on the Item number column but i have not created a dependency between the attributes and Item# column.
Will the controller logic fire for every column while i am entering a new record?
Thanks.

Answer 1

Hi Anil,
Thanks for the response. I have given up that i will get reply on this post.
I have done the substitution and upload the jpx to umsing importer.
But you are correct may be i might have done something wrong. Can you please help me. I can send you the files if you can review and let me know it will be great.
Also, will this approach work since PO Lines is a advanced bean table ?
One of the experts suggested to use Bound values. I am not sure how to implement it though?
I have went and told back to my business team that I am not able to do this so now they have asked me to enable/disable columns based on a dff value on po header. I thought this will be easier by extending the controller class on PO Lines table but that too is not working.
Can you help me please ?
Here is my code to extend the controller class :-
package xxpb.oracle.apps.po.webui;
import oracle.apps.fnd.common.VersionInfo;
import oracle.apps.fnd.framework.webui.OAControllerImpl;
import oracle.apps.fnd.framework.webui.OAPageContext;
import oracle.apps.fnd.framework.webui.beans.OAWebBean;
import oracle.apps.fnd.framework.webui.beans.message.OAMessageLovInputBean;
import oracle.apps.fnd.framework.webui.beans.message.OAMessageTextInputBean;
import oracle.apps.fnd.framework.webui.beans.table.OAAdvancedTableBean;
import oracle.apps.fnd.framework.webui.beans.table.OAColumnBean;
import oracle.apps.fnd.framework.webui.beans.table.OASortableHeaderBean;
import oracle.apps.fnd.framework.webui.beans.table.OATableBean;
import oracle.apps.po.document.order.webui.OrderLinesTableRNCO;
public class XXPBOrderLinesTableRNCO extends OrderLinesTableRNCO
public void processRequest(OAPageContext pageContext, OAWebBean webBean)
super.processRequest(pageContext, webBean);
OAAdvancedTableBean tableBean =
(OAAdvancedTableBean)webBean.findIndexedChildRecursive("LinesTableRN");
OAMessageLovInputBean poLineLov =
(OAMessageLovInputBean)tableBean.findIndexedChildRecursive("XXPBSecondaryUOMLOV");
poLineLov.setDisabled(false);
}