Both Transit and fressian take a Handler map as arguments to the 
reader/writer functions/constructors. So its pretty straightforward to 
replace the default handlers with handlers that do what you want. 

I have no example handy but it should be documented in both libraries. 
Transit has something called mapBuilder, not sure about fressian.

HTH,
/thomas

On Thursday, August 7, 2014 2:48:20 PM UTC+2, Islon Scherer wrote:
>
> Hi,
>
> I have a program I wrote who needs to serialize java HashMaps and 
> ArrayLists to and from disk but AFAIK (and after some simple tests) it 
> seems fressian writes those maps/lists correctly but read them back as 
> clojure maps and lists (persistent).
> Is there a way to tell fressian (could be transit too) to read them back 
> as java maps/lists?
> Just for some context, it's a huge amount of data and it should be 
> serialized in binary format/non-human readable way for performance and 
> space considerations. All the data is composed of simple types (maps, 
> lists, strings, numbers, keywords only. No complex objects)
> I'm thinking about maybe just using some java serialization library if 
> fressian/transit doesn't support that.
>
> Thanks in advance.
>

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