Using Java Proxies

Hi,

I understood java proxies generation.But in case of practical scenario's i failed to implement. Please any one help me, how to read the data through javaApplication and how to call the bean class through javaApplication.

my scenario is like:

I generated Client javaProxy( out bound Messege Interface). I have a 3 input files with different data. I need to read all the data and put in one common output file.

for that,where do i write java application which calls generated bean class which intern returns the data to Integration server? and how to call bean class from java application though graphicial representation:

file-1 |

file-2 | >javaApplication >beanClass--->XI->File

file-3 |