How can I extend the  JCA File Adapter

I would like to extend the JCA File adapter. I want to overcome the file size limit of the File Adapter.
I want to the JCA Fileadapter to have the following functionalites.
1. Split a file into smaller chunks, The chunk size will be set at design time and will be in bytes, an example would be split the file into 500K chunks.
2. Each file chunk will contain a Correlation Identifier and Message Sequence identification fields so it can be rebuilt by the receiver.
Is the beat approach is to write my own JCA File Adapter if I do how do I incorporate it within Jdeveloper?

In short, you will have to do the following:
1. Develop an adapter which is compliant to JCA 1.5 spec. You should be able to run that as a web application within the OAS.
2. It should create a WSDL which is adhering to the WSDL Spec 1.1. Then JDeveloper will consume the same without any issues during the design time.
Alternately,
You can check with Oracle with the new featuren requrest for enhancing the File adapter.

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