AST to XML

[Michael Mast]

Hi.  I would like to persist the AST as XML.  I  was thinking of (manually) translating my AST grammar to an XSD that maps the individual ASTs to their respective XML elements and then using JAXB to generate the Java objects.  Then, while walking the AST, I could instantiate the JAXB object that corresponds to the particular AST node.  Once I’ve basically recreated the AST with JAXB objects, I can have JAXB stream the objects to XML.  Also, with the AST represented as JAXB objects, I could perform XSL translations against the representation of the AST.

 

What’s the best way to do this?  I was thinking maybe of tweaking the .txt template files within the SableCC jar such that the generated AST classes are JAXB classes.  Then, instead of walking the generated AST I could just “tell” the AST to stream itself into XML.

 

What do you think?

 

Thanks,

 

Mike.

 

 

[Gonzalo Ortiz Jaureguizar]

I usually store ASTs (and any other graph of objects) with XStream (http://xstream.codehaus.org/). I don't kown if you want to use JAXB for some special reason, but if don't, I think is better to use a generic system.

2013/2/15 Michael Mast <mbm...@pacbell.net>

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[peter lavalle]

My Two Cents; (as a lurker)

So you're planning;

    sablecc:CST -> sablecc:AST -> jaxb:AST

(1)

I'd skip SableCC's CST -> AST transformation, your XSD is already emitting a "generic" AST structure, so why not construct that yourself?

 

(2)

If using sableCC's AST is required (for your coursework?) or easy (for you) I'd have SableCC and JAXB emit identically named classes (in different packages) and use java's reflection to copy one to the other

[Michael Mast]

Wow… I must’ve been living under a rock or something.  XStream looks great.  Thanks.