How to set value to Model Node of cardinality 0..N

I am looking for a way to set value to a model node of cardinality 0..N
i imported a WSDL into my applicaion , which has the following Node Structure.
--- ModelNode_Request
      ---ModleNode3_Roles  [ cardinality 0..n singleton 1..1]
           ****Model_Attribute RoleID     <<<<<<<<<<<<
           ****Model_Attribute SysID      <<<<<<<<<<<<
i tried with the below code  but effort went in vain.
i tried following ways to set the value but , i get Nullpointer expection error.
i aslo looked into the forum but couldnt find any solid solution.
It would be great if some one can throw some snippets on the same.
Edited by: RR on Dec 22, 2008 5:48 PM

Hi RR,
As far as i know u can set model nodes and values nodes are different. whats shown in the link is for values node. u should do differently for model node..
    Since this is a model node...u first need to create an object of the node type. then create an arraylist for that and then add values..
try this..
// Create an object for structures in the node to be used
Yweb_Po_Items objPOItems = null; // where Yweb_Po_Items is the structure of the node...
// Create an abstractlist for structures in the RFC node to be used, if u are planning to give single or multiple rows (in node/table) as input to the RFC
AbstractList POObjAbsList = new Yweb_Po_Items.Yweb_Po_Items_List();
objPOItems = new Yweb_Po_Items();
//    /set first set of values
objPOItems.setColumn1(u201Cabcu201D); // here hard codede for example
// add the object to the abstract list
//    /set second set of values
// add the object to the abstract list again
POObjAbsList.add(objPOItems); // now u got 2 records
// now set the abstractlist to the node in the RFC
Hope this information is useful...
Md. Yusuf

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