Dear Bas and Erik, Thanks for your good tips, I'll keep them in mind. However, I don't know to what extent it applies to my current situation. My first post was perhaps a bit misleading in that I have defined some types which beautifully fit in algebraic data types. I.e. I'd rather express the problem in the Clean type than in an OO structure (btw, the other language I use is not java, it was just an hypothetical example). I guess JSON is not expressive enough to deal with ADTs, or is it?
________________________________ Van: [email protected] [[email protected]] namens Bas Lijnse [[email protected]] Verzonden: maandag 21 november 2011 15:02 Aan: [email protected] Onderwerp: Re: [clean-list] Dynamic typing for communication with non-cleanprograms The JSON libraries that Erik mentions are available from: https://svn.cs.ru.nl/repos/clean-platform/trunk/src/libraries/OS-Independent/Text/ I always use this when I want to do simple data exchange between Clean and another language (I may be biased as author/maintainer of the library though :) ) Best, Bas On 21-11-11 14:52, [email protected]<mailto:[email protected]> wrote: 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]<mailto:[email protected]> namens Groenouwe, C. Verzonden: ma 21-11-2011 13:39 Aan: [email protected]<mailto:[email protected]> CC: [email protected]<mailto:[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 _______________________________________________ clean-list mailing list [email protected]<mailto:[email protected]> http://mailman.science.ru.nl/mailman/listinfo/clean-list
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