Hi everybody,
short: is there a way to have an automatic counter for the RHS of a rule when
inserting several objects in one rule?
Long:
I use drools with a DSL to insert items for a frontend dropdown box. The
generated rule is e.g. like the following one:
rule "testRule_H"
dialect "mvel"
when
SomePartOfMyModel( someField == "H" )
then
DropDownItem fact1 = new DropDownItem();
fact1.setLabel( "My Label 1" ); fact1.setValue( "B" );
insert
(fact1);
DropDownItem fact1 = new DropDownItem();
fact1.setLabel( "My Label 2" ); fact1.setValue( "A" );
insert
(fact1);
This works nicely and I get all the items. The problem I have is with the
sorting. Users use Guvnor to edit the available items for the dropdown box, so
they add and remove items from the RHS. Since I retrieve those objects from the
knowledge base in my java code like this:
Collection<FactHandle> handles = statefulKnowledgeSession.getFactHandles(new
ClassObjectFilter(DropDownItem.class));
for (FactHandle handle : handles) {
DropDownItem selectItem = (DropDownItem)
statefulKnowledgeSession.getObject(handle);
...
I think I cannot be sure about the order the objects are retrieved (it's a
collection, no guaranteed sorting!). So, I sort the DropDownItems
alphabetically by their value.
My question now is, as stated above: How can I implement a counter which I can
use in the facts being inserted to keep my inserted facts (DropDownItems) in
the same order as they are inserted?
Thanks in advance
Dominik
…………………………………………………………………
mit freundlichen Grüßen / kind regards
Dominik Sandjaja
Fon: +49 (0) 203 60878 183
Fax: +49 (0) 203 60878 222
e-mail: dominik.sandj...@it-motive.de
it-motive AG
Zum Walkmüller 10-12
47269 Duisburg
i...@it-motive.de
http://www.it-motive.de
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Vorsitzender des Aufsichtsrats: Dipl.-Ing. Klaus Straub
Vorstand: Horst-Dieter Deelmann (Vors.), Matthias Heming, Christoph Tim Klose
HRB 9207, Amtsgericht Duisburg
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