New Enhanced JSON Output Transform

[Sergio Ramazzina (SERASOFT)]

Dear all,

yesterday I released a PR containing the new Enhanced JSON Output 
Transform I ported from our Kettle plugins to Hop. It is a little 
different and more powerful respect to the current JSON Output transform 
and was written mainly to overcome its limitations. I'm going to write 
the needed documentation and build some samples that I will push as soon 
as possible so that anyone will be able to try it out. The new transform 
is completely based on Jackson to process JSON files. All the new 
functionality like Pritty Printing and Injection has been applied to 
this new Transform leaving the original unchanged.

Would be nice in my opinion to introduce a new category of the Transform 
selection dialog that we can call Preview and put in there all the new 
Transforms that we decide to include in Hop. They will be considereded 
more explicitly as "Beta Versions" until we vote to promote the new 
Transform as "Production Ready" or "Certified" and move them in the real 
categories.

Cheers

Sergio


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