Problem with complex predicates

Question

Hi,
i'm trying to create a complex predicate to query for some tasks.
I have 2 predicates, and i'm trying to create a complex one with the following code:
complexPred = new Predicate(pred1, Predicate.AND, pred2);
I have no problems when querying for tasks with either pred1 or pred2, but when executing the query with complexPred, i get a null pointer exception.
I realised that complexPred has an empty clause list. Am I missing something when creating the complex predicate?
Thanks in advanced

Answer 1

Thanks for the example, but i have the same problem running it as I exposed in my previous post.
When I reach this point in the code...
Predicate predicate = null;
if ( predicateSearch == null ) {         
predicate = predicateBasic;
} else {         
predicate = new Predicate (predicateBasic,Predicate.AND,predicateSearch);
...both predicateSearch and predicateBasic have content, and when they are combined into predicate, this new variable predicate has an empty clause list (predicate.getPredicateClauseList() is an empty ArrayList, while predicateSearch.getPredicateClauseList() and predicateBasic.getPredicateClauseList() have both content)
The rest of the components of the variable predicate (tables, values...) seems to be ok and a result of the combination of predicateBasic and predicateSearch
This is part of the log I get:
<*::*> <displayColumn xmlns="http://xmlns.oracle.com/bpel/workflow/taskQuery">urlAttribute1</displayColumn>
<*::*> <displayColumn xmlns="http://xmlns.oracle.com/bpel/workflow/taskQuery">urlAttribute2</displayColumn>
<*::*> </displayColumnList>
<*::*> <optionalInfoList xmlns="http://xmlns.oracle.com/bpel/workflow/taskQuery">
<*::*> <taskOptionalInfo xmlns="http://xmlns.oracle.com/bpel/workflow/taskQuery">Actions</taskOptionalInfo>
<*::*> </optionalInfoList>
<*::*> <predicate xmlns="http://xmlns.oracle.com/bpel/workflow/taskQuery">
<*::*> <assignmentFilter xmlns="http://xmlns.oracle.com/bpel/workflow/taskQuery">My+Group</assignmentFilter>
<*::*> </predicate>
<*::*> <ordering xmlns="http://xmlns.oracle.com/bpel/workflow/taskQuery">
<*::*> <clause xmlns="http://xmlns.oracle.com/bpel/workflow/taskQuery">
<*::*> <col
As you can see after assigmentFilter, the label predicate is closed, and is missing a label clause with all the clauseList information
Thanks in advanced,
Cris
Edited by: user7352348 on 07-nov-2011 23:47