To access a sequence.nextval from Infobus applet

Question

Hi
I have Infobus Dataform applet which displays the columns of the
table - timesheets which has a column "line_item" which has to
get it's value from a database sequence.
So I followed the approach followed in the Acme - sample
application ViewMembers.java.
Which the row added event of the RowsetInfo -
The following code was added with my Rowset and sequence used.
void ACME_MEMBERSIter_rowAdded(RowChangeEvent e) throws
java.sql.SQLException,
javax.infobus.DuplicateColumnException,
javax.infobus.ColumnNotFoundException,
javax.infobus.InvalidDataException
RowsetAccess rsa = e.getDataItem();
DbAccess dba = rsa.getDb();
RowsetAccess seq = null;
seq = (RowsetAccess)dba.executeRetrieval(
"select acme_member_id_seq.nextval as
\"new_id\" from dual",
"infobus:/oracle/sessionInfo1/new_id",
null);
ImmediateAccess nv = null;
ImmediateAccess column_id = null;
nv = (ImmediateAccess)seq.getColumnItem("new_id");
column_id = (ImmediateAccess)rsa.getColumnItem
("MEMBER_ID");
column_id.setValue(nv.getValueAsString());
This does not work when I run it from Jdeveloper I have debugged
it an umpteen times and still no clue.
The statement
(RowsetAccess)dba.executeRetrieval(
"select acme_member_id_seq.nextval as
\"new_id\" from dual",
"infobus:/oracle/sessionInfo1/new_id",
null);
JUST DOES NOT WORK.
Please help.
Regards
Rajs
null

Answer 1

Hi Shachar,
When SEQUENCE_SETUP/RESETUP is called, I need to modify the arbitrary data.
Arbitrary data can be accessed in 2 ways (as per my knowledge)
1. GetNewStreamValue() & SetStreamValue() (for this I need AEGP_EffectRef which will be NULL for the new effect when it comes to SEQUENCE_SETUP/RESETUP).
2. If PF_ParamDef* params is not NULL then,
     PF_Handle                arbH        = params[PARAM_ID]->u.arb_d.value;
    CG_ArbData                *arbP;
    arbP    = reinterpret_cast<CG_ArbData*>(PF_LOCK_HANDLE(arbH));
In the first way, when SEQUENCE_SETUP/RESETUP is called AEGP_EffectRef is NULL, so I cannot use it.
In the second way, when SEQUENCE_SETUP/RESETUP is called  PF_ParamDef* params is NULL, so I cannot use it.
Any ideas?