Constructing the Idocs to comminicate to SAP from Java

Hi,

In my application we are making use of IDocs to communicate to SAP from Java via MQ series. I mean we are constructing the Idoc and sending the Idoc to MQ and from MQ, SAP will receive the IDoc and vice versa.

Right now we are making use of IBM's Visual Age API for constructing the IDoc. As Visual Age API is Obsolete, we are planning to migrate to latest technologies.

Can you please suggest the following things.

1) What is the best way of constructing IDocs to comminicate to SAP from java via middle ware technologies( MQ).

2) Can we construct the Idocs through JCo API?

Thank you very much for your time and reply.

with regards,

venu