Not Yet Documented Array Example as JSP doesn't work.

Question

Example:
http://radio.weblogs.com/0118231/stories/2004/09/23/notYetDocumentedAdfSampleApplications.html
Steve, in the Not yet documented examples, you have an Array of String Domain Example. We tried to modify this to create a simple struts flow that sets up the view with some parameters and then shows a datapage of the results.
When run in batch mode, you get:
Validation Error
You must correct the following error(s) before proceeding:
JBO-28302: Piggyback write error
oracle.sql.CharacterSet1Byte
JBO-29000: Unexpected exception caught: oracle.jbo.InvalidOperException, msg=JBO-25063: Operation getCurrentRowSlot cannot be performed because the working set object is not bound.
JBO-25063: Operation getCurrentRowSlot cannot be performed because the working set object is not bound.
the 28302 and 25063 errors are undocumented.
If you switch to Immediate mode, it works.
Similarly, we tried to use a numeric Array in our current project to filter a view of records to a specific client list (client and his associations). The view renders OK the first time, but when you click a setCurrentRowWithKey hyperlink, the view ends up getting "refreshed" so that our JSTL expressions that point back to this "master page" bindings, i.e. ${data.MasterPageUIModel.ViewPfRptsDueView1} show incorrect data.
Normally, if you drop a view object on the page, and have a setCurrentRowWithKey, then navigate to a detail set, it RETAINS the row selected when you return to this view. Without changing ANYTHING else, other than the where clause to read: client_id in (' || my_client_list ||')', it worked perfectly. It also worked perfectly if we switched our sync mode to: Immediate instead of batch.
Can you/anyone elaborate why it works in one mode and not in another?

Answer 1

Repost.
Here's a section of the batch mode bc4j.log:
[221] Array.getInternalArray(281) Warning:No element type set on this array. Assuming java.lang.Object.
[222] RuntimeViewRowSetIteratorInfo.rangeRefreshed(1266) [RangeRefreshEvent: EmpArrayView1 start=0 count=3]
[223] Diagnostic.printStackTrace(405) java.io.NotSerializableException: oracle.sql.CharacterSet1Byte
     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1054)
     at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java)
     at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
     at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java)
     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
     at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
=====> at oracle.jbo.domain.Array.writeObject(Array.java:748)
... [ much removed ] ...
NOTE [221] and [223].
It appears to work in batch mode, if you make a call to the array method: useElementType, i.e.
arr = new Array(descriptor,conn,names);
arr.useElementType( java.lang.String.class);
However, this method appears to be written incorrectly. IF I just change the array.java useElementType method to read:
public void useElementType( Class claz )
if ( mElemType == null )
mElemType = claz;
instead of:
public void useElementType(Class claz)
if (mElemType != null)
mElemType = claz;
it works.
I'm just trying to get some closure on this.