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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Dear Bas and Erik,<br>
<br>
Thanks for your good tips, I'll keep them in mind. However, I<br>
don't know to what extent it applies to my current situation. My<br>
first post was perhaps a bit misleading in that I have defined some<br>
types which beautifully fit in algebraic data types. I.e. I'd rather<br>
express the problem in the Clean type than in an OO structure (btw, the<br>
other language I use is not java, it was just an hypothetical example).<br>
I guess JSON is not expressive enough to deal with ADTs, or is it?<br>
<br>
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<div style="direction: ltr;" id="divRpF345755"><font color="#000000" face="Tahoma" size="2"><b>Van:</b> clean-list-bounces@science.ru.nl [clean-list-bounces@science.ru.nl] namens Bas Lijnse [b.lijnse@cs.ru.nl]<br>
<b>Verzonden:</b> maandag 21 november 2011 15:02<br>
<b>Aan:</b> clean-list@science.ru.nl<br>
<b>Onderwerp:</b> Re: [clean-list] Dynamic typing for communication with non-cleanprograms<br>
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<div>The JSON libraries that Erik mentions are available from:<br>
<a class="moz-txt-link-freetext" href="https://svn.cs.ru.nl/repos/clean-platform/trunk/src/libraries/OS-Independent/Text/" target="_blank">https://svn.cs.ru.nl/repos/clean-platform/trunk/src/libraries/OS-Independent/Text/</a><br>
<br>
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 :) )<br>
<br>
Best,<br>
Bas<br>
<br>
On 21-11-11 14:52, <a class="moz-txt-link-abbreviated" href="mailto:zuurb078@planet.nl" target="_blank">
zuurb078@planet.nl</a> wrote:
<blockquote type="cite">
<p><font size="2">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.<br>
<br>
<br>
-----Oorspronkelijk bericht-----<br>
Van: <a class="moz-txt-link-abbreviated" href="mailto:clean-list-bounces@science.ru.nl" target="_blank">
clean-list-bounces@science.ru.nl</a> namens Groenouwe, C.<br>
Verzonden: ma 21-11-2011 13:39<br>
Aan: <a class="moz-txt-link-abbreviated" href="mailto:pieter@cs.ru.nl" target="_blank">
pieter@cs.ru.nl</a><br>
CC: <a class="moz-txt-link-abbreviated" href="mailto:clean-list@science.ru.nl" target="_blank">
clean-list@science.ru.nl</a><br>
Onderwerp: [clean-list] Dynamic typing for communication with non-cleanprograms<br>
<br>
Dear Pieter (and others),<br>
<br>
Then another question:<br>
<br>
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...) ;-)<br>
<br>
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.<br>
<br>
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.<br>
<br>
Thanks in advance,<br>
<br>
Chide<br>
<br>
<br>
<br>
<br>
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