I am having to interface data from different databases in my
org to other orgs (so far within the company).

I have Servlets taking the request and returning the data (adding
extra values in certain cases).
The existing users are expecting either XML or delimited or positional
formats.
I had written formatters to do this job about several yrs ago.
Since we are getting more users asking data in different flavors to fit
their new or legacy apps, I was thinking of rewriting our
formatting classes now than later before it can clutter.

My approach is to use Jaxp to create a DOM structures from the
data retrieved, add an attribute like "PAD_LEN" for each data
element, pass the document to the Formatter, which...
- Uses DOM Transformers to build xml format for xml clients.
- Custom Delimiter Transformer1: Walks through the document and appends
data and delimiters to the resultbuffer in case of delimited clients.
- Custom Positional Transformer2: Walks through the document and pads
trailing spaces for fixed-positional format users.

Though this will take a lot of work to re-write the existing queries, I
think it would be worth a while before it gets even bulkier.
I thought this approach will also help if we migrate towards soap
structure.

I am curious to know if there are better approaches for such a
scenario. I read Biztalk is capable of something like this... but we
dont want to use any third-party tools to do this job for sure, just
because it gives us more control over the formats.

Any suggestions appreciated. Thnks.