How to do the multimapping in File to File Scenario

Question

Hi All,
I am doing File to File scenario using Multimapping Concept.pls send the procedure how to do the Massege mapping using Multimapping.
I have a source structure like this.
<order header>
order no
order Description
</order header>
<Orderitem>
matno
description
Qty
UOM
</Orderitem>
i need output text file Like
Ono Oodesc OMatno Odes Oqty OUOM
1      02    123    Oil  2    L
1      02    789    Milk 4    L
How to do the multimapping for this.if any Advanced java functions needed pls send the code.
Thanks
Govindu.

Answer 1

Hello Govind,
Make the target str as below
<root>
<Row>
<OrderNo></OrderNo>
<OrderDesc></OrderDesc>
<Matno></Matno>,
<Desc></Desc>
<Qty></Qty>
<UOM></UOM>
</Row>
</root>
The mapping for elements
<Matno>,<Desc>,<Qty>,<UOM> is straight-forward. The node <Row> can be mapped to <OrderItem> node in source. For orderNo and OrderDesc you need to use advanced UDF (with entire queue cached) as below.
public void getOrderNo(String[] a,String[] b,ResultList result, Container container){
/Declare a vector to store unique Order Numbers  /Order Desc/
Vector vOno = new Vector();
     for (int i = 0;i<a.length;i++){
     if (a<i>.equals()ResultList.CC) continue;
     /Add distinct Order numbers to the vector/
     if(!vOno.contains(a<i>)) vOno.add(a<i>);
int headerCounter = 0;
String value = new String();
value = (String) vOno.get(headerCounter);
     for (int j = 0;j<b.length;j++){
     /When context changes, move to next order no/
     if (b[j].equals()ResultList.CC){
                   headerCounter++;
                   value = (String) vOno.get(headerCounter);
                  continue;
     /Repeat the current order number/Order Desc until a context change occurs/
     result.addValue(value);
The mapping for OrderNo can be like below:
Pass <Order No> from Header to the UDF as array a[] and <OrderItem> from Item as array b[]. Take the output of the function and make it SplitByValue the result of which can be passed to OrderNo. The context of both < Order No> and <OrderItem> has to be one level higher.
Similar mapping for OrderDesc can be made using the same UDF
I hope that resolves your problem.
Regards
Amit