How to execute an ABAP Mapping after a Java Mapping

Hi, i have found a Bug in XI and SAP said to me that the only solution is to execute an ABAP mapping after my java mapping.
I have an IDOC to FILE scenario
Could anyone orient me on what do i have to configure, so after my java mapping i can execute an abap mapping ?.
Do i have to use process integration?
thanks
Mariano.

i have developed a Java mapping originally, but XI has a bug. When you do not write anything to the outputStream XI instead of writing an emtpy file writes a file containing one byte ( 0x00 ) and this is a problem.
SAP said to me that they will not fix this issue so they recomend me to create an abap mapping after my java mapping that will send no information if it receives this byte (0x00) and if not it will write all the information as received.
My doubt regarding putting several mappings in the interface mapping configuration is this...
Actual configuration:
SOURCE MSG A -> ORIGINAL MAPPING -> TARGET MSG B
Proposed configuration
SOURCE. MSG A -> ORIGINAL MAPPING -> TARGET MSG B
SOURCE. MSG A -> PATCH MAPPING -> TARGET MSG B
I dont understand what receives de "patch mapping" it receives the structure from TARGET MSG B?
regards
mariano

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