How to do a calculated field in view object

I am using Jdeveloper 11 R2 (11.1.2.3)
In some use case I require to calculate a field based on information from another view object
I came with idea of a transient attribute in first view object and try to initialize it in getter method in RowImpl
But I dont know how I can access another view object in RowImpl class
Any solution or suggestion?
Appreciate your comments
Regards
Mohsen

Create a view accessor in the VO from which you want to access another VO.
get the other VO using the getter of the View accessor into a rowset obj.
setnamedwhereclauseparams if needed.
executequery and then iterate over the rs to get whichever attribute you want - note the attribute should be the attribute in the called VO.
Edited by: bigchill on 6/03/2013 17:37

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field of view.png ‏2437 KB

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    at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:468)
    at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:293)
    at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:199)
    at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119)
    at java.security.AccessController.doPrivileged(Native Method)
    at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:315)
    at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:442)
    at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103)
    at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171)
    at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:139)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
    at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
    at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
    at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
    at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
    at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)
any ideas please?

How to make Transient Attribute Mandatory in View Object?

Hi ,
I have a Transient Attribute 'TransientFromCode' which is based on LOV .On UI ,I am showing this 'TransientFromCode' as 'SelectOneChoice' .
So on selection of this i am populating other mandatory attributes.
My requirement is to show this as 'Required' on UI but in View Object i am not able to find mandatory property for this attribute.
I dont want to use required='true' . So can you plesae tell me is there any way to make Transient attibute as mandatory on UI .
Thanks

940637 - Your Use Case is a little vague\confusing.
If you are just trying to get the standard "Required" architecture, it probably isn't working because you have incorrect syntax. It is #{bindings.MyViewObj.MyAttr.hints.mandatory}
Yours: "#{bindings.UnitOfMeasureIntraClassConversion.hints.TransientItemDesc.mandatory}"
It will "dynamically" pick this up at Runtime from the ViewObject Attributes "Mandatory" property (Attributes\Details tab), BUT the EL will always evaluate to "true" so this is the same functionally as just hard coding the UI component's Required property to "true" (although doing so is against Best Practices)
If you are just wanting to SHOW the field as required without the standard Validation logic (because you are coding your own), you could:
1) JUST set the UI component's "ShowRequired" property = true. This displays the * next to the Label (regardless of actual View Object Attr setting) but fires no validation.
2) If you want to not show * but some custom standard, you could just create ANOTHER transient Attribute in the View Object and call it "TransientItemDescRequired" and set it to a Literal "y" or leave it blank and programmatically set it later... You can code your own validator\method\whatever against it, etc
Edited by: donhoyt on Jul 5, 2012 7:58 AM

How to Set Distinct SQL Clause on View Object without using Expert Mode.

Hi to all Actually i have a View Object usign 3 entities
if i use expert mode in my VO, it generate
QRSLT WHERE
instruction and force to include all columns on my dynamic where clause on select statement i can't include columns because get me duplicate rows
How i can include disctinct clause without usign expert mode or any other solution?
Note that in normal mode without expert mode QRSLT WHERE is not generate and all work fine
For example
select * ( select id , name from table) QRSLT WHERE loc = ..
if i use expert mode it generate QRSLT WHERE and if loc is not predicated colums get me and error :
( ORA-00904: invalid identifier )
in simple mode of View Object all work fine..
Any suggestion on It will be appreciate.....
Tnx

My problem is that when use expert mode
it's change simple select statement for a select that use
select * from (select column....)
qrslt WHERE (column=somevalue)
this kind of select force me to include all where conditions of qrslt on my select columns and this get duplicate rows
thats beacuse i need include distinct without use expert mode
Anny Help on this?

How to Insert the row in the View object

I want to insert the row in the view object by instantiating Impl.java file
Could someone please let me know how to insert the blank row
Thanks

Inserting onto a view object should be done the following way:
//vo is your view object
Row aRow = vo.createRow();
//Set your attributes
aRow.setAttribute("AttributeName", objectValue);
//insert
vo.insertRow(aRow);
That should work for you if you are programming the input. If you are using java components bound to columns in a view object then the input should be done automatically for you when you commit.

How to get user browser locale from view object

Hello,
Currently, I have a view object that's used to retrieve localized messages from data base. The resource table looks like the following:
MSG_ID VARCHAR2, --> specify the L10N resource reference
LOCALE VARCHAR2, --> used to specify the user locale (browser locale)
MESSAGE VARCHAR2 --> real message
I'm creating a bind variable (let's say it 'RequestLocale') in this view object to specify the locale and to get the expected L10N message. Currently, the value for this bind is set as an Expression with value of 'viewObject.DBTransaction.session.locale.toString()'.
After defining the view object (and the bind variable like above), I created a table by dragging the view object to a jsf page, and run and open the page in a web browser. It seems that the messages (specified by the locale) could be retrieved correctly. But once I change the web browser language settings to another preferred language, and refresh the page, I found that the message is still for the previous locale, and not refreshed to the locale (language/country) that's newly set in web browser.
Am I supposed to do more thing to get the 'locale' work by using the adf view object bind variable?
Thanks.

Hi,
after changing the locale, can you try a re-direct of the page to see if this changes the locale. In ADF, the locale is set by the HTTP request handler in the ADF lifecycle ensuring that the locale is passed to the middle tier. So the expected change is to come from the view layer (which is why I think you need a redirect). Another option to check is to access the HttpRequestObject from the FacesContext --> External Application to check the request locale
Frank

How to put validation between attributes at View Object level in BC4J

Hi,
Is it possible in BC4J to put validation between attributes at View Object level?
I know that I can do it at Entity Object level in validateEntity method, but I have several View Objects connected with one Entity Object and don't want to have the same validation logic for all View Objects.
Thanks for any help!

It returns errorWhat error does it return?
John

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