-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I don't see that the contibutors files are fundementally different. - From what I understand, it should be possible to write a generic function, importCSV :: FilePath -> IO [ (String,String) ] where the 1st value is a field name and the 2nd the value extracted from the file. As for the mapping to XML, I would suggest using HaXml and writing a set of functions that write the value for a field into the correct place. These could then be indexed in another tuple list of type, [(String, String -> CFilter)] Then draw it all together with a liberal use of map and fold. Tom On Mon, 4 Aug 2003 10:05 pm, Tanton Gibbs wrote:
Haskellers,
I'm currently working on my first Haskell program. I really like the language so far, though it has been hard to break the OO frame of mind. Normally, I'm a C++/Perl programmer, but I have really enjoyed the type-safety of Haskell over Perl as well as the Hugs interpreter over a make cycle. Since execution time is not important, I haven't found any issues with using Hugs.
Now, on to my problem. Our company uses XML to describe our processes. I'm writing a DSL in Haskell that will print that XML out. I've done most of it, but now I'm describing the I/O in the XML. Basically, we have files come in in various formats from various file contributors and we use a mapping program to map the fields to the right spots in the XML. So, for example, one contributor could have the following layout:
Field Name Start Pos Length First Name, 1, 10 Last Name, 11, 10
and another contributor could have them in exactly the opposite order. Furthermore, some contributors may have fields that others don't (for example: DOB).
I'm now trying to come up with a way to map this information into Haskell dynamically. It would be trivial to create a module for each Contributor and then import all the modules. However, we have hundreds of contributors and it would be a pain to have to change and re-release the program every time we added a new contributor. Therefore, I need someway to take this information and map it into my Haskell structures. I have come up with two options. One would be to let Haskell dynamically import a contributor module (but I don't think that is currently possible); the other would be to use a configuration file and have the user specify the information through it. Is there a standard Config file module? Is there any other way to do this that I missed?
Thanks in advance, Tanton Gibbs, Ph.D. Technical Architect Abilitec Knowledge Base Acxiom Corporation Conway, AR 72034
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