And dump all the hard work on Java? Dynamics are a proprietary Clean format and 
likely more complex/liberal than you need. Maybe JSON is easier to use: 
probably available in your JAVA implementation already and under the hood JSON 
converters are already available in Clean iTasks.


-----Oorspronkelijk bericht-----
Van: [email protected] namens Groenouwe, C.
Verzonden: ma 21-11-2011 13:39
Aan: [email protected]
CC: [email protected]
Onderwerp: [clean-list] Dynamic typing for communication with non-cleanprograms
 
Dear Pieter (and others),

Then another question:

If you want to send information from one programming language (e.g. Java) to 
Clean, a typical way to go would be the following. First define an intermediate 
representation (for example in XML, or your own format). Then write a generator 
on the sender's side (in this case in Java), which converts a Java value or 
object into a file in the intermediate representation. Finally, write a parser 
on the receiver's side (Clean) which parses file holding the intermediate 
representation into a Clean value (with a Clean type). This is a labourious 
process during which you have the feeling you are are doing a lot of 
unnecessary work. As if you are repackaging the same sandwich three times in a 
row, first in a Java structure, then in the intermediate structure, and then 
again in a Clean structure... Waste of time (and the environment...) ;-)

However, I had an idea: is it possible to use Clean's dynamic types for this 
purpose? Instead of generating some arbitrary intermediate type on the sender's 
side, immediately generate a value that can be read by Clean's dynamic type 
system. This would cut your work in half: you don't have to write a parser on 
Clean's side any more.

I don't have any experience using Clean's dynamic typing yet, therefore I 
decided to first ask whether it is a fruitful approach before exploring it. 
Thus, is this possible and is it a good idea? Of course, I'm also open to other 
suggestions.

Thanks in advance,

Chide




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