I have a set of jar files which is basically an API built in Java , Kotlin, Groovy that is used as an ETL tool to perform loads to the Database. I want to build the code on my local computer and understand the code by running all the command line programs that are available as part of this API. I am not a Java professional and hence need some help from an expert who can interpret the code and explain to me how to run the code and also explain the source code.
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