Talend - split a string to n rows - talend

Question

I would like to split a string in a column to n rows in Talend.
For example :
column
2aabbccdd
The first number is the "n" which I use to define the row lenght, so the expected result should be :
row 1 = aa
row 2 = bb
row 3 = cc
row 4 = dd
The idea here is to iterate on the string and cut it every 2 characters.
Any idea please ?

Answer 1

I would use a tJavaFlex to split the string, with a trick to have n rows coming out of it.
tJavaFlex's main code:
int n = Integer.parseInt(row1.str.substring(0, 4)); //get n from the first 4 characters
String str2 = row1.str.substring(4); //get the string after n
int nbParts = (str2.length() + 1) / n;
System.out.println("number of parts = " + nbParts);
for (int i = 0; i < nbParts; i++)
{
String part = str2.substring(i * n);
if(part.length() > n)
{
part = part.substring(0, n);
}
row2.str = part;
And tJavaFlex's end code is just a closing brace:
}
The trick is to use a for loop in the main code, but only close it in the end code.
tFixedFlowInput contains just one column holding the input string.