Error using View Object in a optionList ?

Hello,
I'm use JDeveloper 9.0.3, BC4J+UIXml, and I have a Create form with a optionList tag, populating with a Object View.
I create a Object View called TipoLocalView.
My code:
<bc4j:messageChoice name="Tipo" attrName="SeqTipoLocalCampus"
prompt="Tipo Local:">
<contents>
<bc4j:optionList attrName="SeqTipoBasico"
textAttrName="NomTipoBasico"
voName="TipoLocalView"/>
</contents>
</bc4j:messageChoice>
The error message:
java.lang.NullPointerException
at oracle.cabo.data.jbo.ui.data.ViewObjectDataProvider.init(Unknown Source)
at oracle.cabo.ui.data.provider.TableDataProvider.init(Unknown Source)
at oracle.cabo.ui.data.provider.CachingDataProvider.init(Unknown Source)
at oracle.cabo.ui.data.provider.DataProviderStack.addDataProvider(Unknown Source)
at oracle.cabo.ui.LogicalNodeRenderingContext.addDataProvider(Unknown Source)
at oracle.cabo.ui.composite.CompositeRenderingContext.addDataProvider(Unknown Source)
at oracle.cabo.ui.laf.base.DataScopeRenderer.prerender(Unknown Source)
at oracle.cabo.ui.BaseRenderer.render(Unknown Source)
at oracle.cabo.ui.BaseUINode.render(Unknown Source)
at oracle.cabo.ui.BaseUINode.render(Unknown Source)
at oracle.cabo.ui.composite.UINodeRenderer.renderWithNode(Unknown Source)
at oracle.cabo.ui.composite.UINodeRenderer.render(Unknown Source)
at oracle.cabo.ui.BaseUINode.render(Unknown Source)
at oracle.cabo.ui.BaseUINode.render(Unknown Source)
at oracle.cabo.ui.composite.UINodeRenderer.renderWithNode(Unknown Source)
at oracle.cabo.ui.composite.UINodeRenderer.render(Unknown Source)
at oracle.cabo.ui.BaseUINode.render(Unknown Source)
at oracle.cabo.ui.BaseUINode.render(Unknown Source)
at oracle.cabo.ui.composite.ContextPoppingUINode$ContextPoppingRenderer.render(Unknown Source)
My questions:
1. The v0Name used in a optionList must be the same of the tag bc4j:viewObjectDef...> on top of page ?
2. What I need make for dynamic optionList operate with Object View ? I need create just Entity Object+View Object ? Or, I need create Entity Object+View Object+Application Module ? What I do for solving this problem ?
thanks,
Danilo

"1. The v0Name used in a optionList must be the same of the tag bc4j:viewObjectDef...> on top of page ?"
yes. but don't forget: you need a particular viewobject for your optionlist. so if you want to manipulate data in in one viewobject using an optionlist, you must have 2 viewobjects.
"2. What I need make for dynamic optionList operate with Object View ? I need create just Entity Object+View Object ? Or, I need create Entity Object+View Object+Application Module ? What I do for solving this problem ?"
depending on your business model you don't necessarly need an entity object, but if you are working with database tables, you usually do. to populate your viewobject, you need an application module.
see the following thread for information sources about bc4j: BC4J must-read ?
trevi

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Hi,
Thanks for providing the online help URL, i have already completed the steps mentioned in URL
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Slot after first() = 0
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Index after next() = -1
Index after reset() = 0
Index after first() = 0
Index after last() = 0
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Slot Beyound Last = 3
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After that, i took the statemet "vo.closeRowSet()" out of the comment and here are the results:
Row Count = 1
Default Slot = 2
Slot after next() = 0
Slot after reset() = 2
Slot after first() = 0
Slot after last() = 0
Deafault index = -1
Index after next() = 0
Index after reset() = -1
Index after first() = 0
Index after last() = 0
Slot Before First = 2
Slot Beyond Last = 3
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My Assumptions:
The Rowset which is created by AM is somehow different from the RowSet which you create in your program. I am absolutely sure that this functionality is not a bug but a design decission. I look at my simple program and see that when it runs, the data is queried and shown on the screen which is all done by AM by instantiating my VO and executing the query on it. AM reasonably must put the RowSet pointer on the first record and not the slot before first record. And i am sure that if i use reset() method on the shown RowSet, the pointer goes to the first record and the data on the screen does not get cleared. Whe we use vo.closeRowSet() and execute the query again, the AM made RowSet is closed and a new one is created and the new RowSet is your's not AM's so it functions as you expect.
Best Regards,
Alireza Vali

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'from ' | |
' my_table f ' | |
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end;
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amount_month number,
member function find(p_id in integer)
return consumer_o
create type body consumer_o as
member function find(p_id in integer)
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as
l_amount number;
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Carlos.

Hi,
can you run the model in the ADF BC tester ? If this is possible the SQL Server doesn't seem to be the problem. Are you on JDeveloper 10.1.3.3? If not, just get this latest build
Frank

ADF forms based on BPM human tasks - Invoking webservices/view objects.

Hi All,
Is anyone aware of whether the following is a valid implementation that has been carried out before.
1. ADF forms based on BPM 11G human tasks.
2.The ADF forms invoke webservices via Webservice data controls. It is pertinent to note that the webservice bring back complex data types. We've tried writing a few forms, resulting in data benig brought back, but not being able to print them to the screen.
3. The ADF forms also use View Object based on sql to bring back tables of data. If view objects are embedded within the forms, the applciation gives rise to a null pointer exception.
Considering the form will be invoked via a BPM worklist entry, is there a setting or configuration we should consider before hand. Is this feasible, is there knowledge of this being done commercially.
Any examples or information regarding the same will be immensely helpful.
Thanks and Regards,
Preethi.
NB : I have posted this in the BPM forum as well as I feel it is relevant to both BPM and ADF.

Hi Joonas.
Plese let me explain me better for your understanding
A big summary for what I meant it's the following:
1- In the procces you made, when you add the HT activity, you have to implement it, this means declare the input(s) parameters you want. This implementation create the .task file.
2- Create an application, and projects as HT you have. Each poject are based on the .task file, and automatically create a Data Control (for each project based on a .task) with all you need.
This w'll be an empty application, so you can customize it all you want. The task selected should have all the parameters previously defined. Those parameters can change if you want.
2- Create a page(s) in the task flow for the task implementation. You can even split the the payload of the task in differents pages, create your custom pages and any logic you need.
3- An important aspect is how to match these application with the HT implemented in the process. It's possible, it's a configuration en the Enterprise Manager.
4- Deploy your application
All these are explain in the book I mentioned
Th book you can find it here:
https://blogs.oracle.com/soacommunity/entry/oracle_soa_suite_11g_handbook_1
Regards Dariel.
PS: Please, let me know if you need more details.

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