Help required in xml to xml Mapping

Question

Hi guys,
While performing mapping between two message types, where my input message type looks like..
<?xml version="1.0" encoding="UTF-8"?>
<DATA>
<FNAME>
<LNAME>
<DATA>
and I'm using both the FNAME and LNAME nodes in the output file.
Here If I'm giving the input file format as...
<?xml version="1.0" encoding="UTF-8"?>
<DATA>
<FNAME>Varun</FNAME>
<DATA>
This is without the LNAME tag...
I want to know, how can I assign a blank value to my output file structure for this particular tag???
I tried using a custom mapping with the code written below, but it didn't work
public String matchFields(String a,Container container){
   //write your code here
String output;
if(a""l)
output = "";     
else
output = a;
return output;
Please help me on this guys....Plzzz
Regards
Varun

Answer 1

Hi,
use it like this if Fname equals constnat[space] then pass the Constant[space] to Fname else value of Fname as under
................................Constant[]------>
FNAME.............................................Then
>Equals....................................IF -
>FNAME
Constant[].........................................ELSE
.......................................FNAME---->   
Constant[]    = Constant [ Space ]
Sachin