Re: [Haskell-cafe] The best way to call Java from Haskell?

Perhaps my needs are unique here, but I thought I'd mention them anyway. The main tool we use at work is based on a hodge-podge of Java, Ant and XSLT code[1]. This thing has to be constantly extended to support new functionality (or fix one of its myriad bugs), and there's no technical hurdle to using Haskell to that end. In fact, my company has released a few packages[2][3][4] specifically in this venture. There are two problems, however: * Some clients have an insistence that code run on the JVM. * It's inconvenient having multiple executables. Additionally, I've run into some problems in the past deploying to ancient Linux servers[5]. So for my use case, I don't care at all about interacting with Java code, I simply want to be able to turn my existing Haskell code into a JAR file. This seems like a much simpler undertaking, but I'm still not aware of any way to get this to happen right now either. Michael [1] http://dita-ot.sourceforge.net/ [2] http://hackage.haskell.org/package/xml-enumerator [3] http://hackage.haskell.org/package/xml-hamlet [4] http://hackage.haskell.org/package/uri-enumerator [5] http://stackoverflow.com/questions/5953199/create-a-static-haskell-linux-exe... On Tue, Oct 11, 2011 at 8:15 AM, JP Moresmau wrote:

I had started a project to start a JVM and call Java code from Haskell, but got sidetracked into EclipseFP, but I hope to go back to it someday. https://github.com/JPMoresmau/HJVM. Have a look at the test suite for some examples.

Hope this helps

JP

On Tue, Oct 11, 2011 at 7:20 AM, Aatch wrote:

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There are some projects to try and provide a bridge between Haskell and the JVM. Unfortunately none of the seem to have much development. As it stands, there is GCJNI, which allows Haskell to invoke Java code, seems like a Java version of hsc2hs, but the site is down, it just 404s. There is also haskell-jvm-bridge, but that doesn't look like it has any development for about 18 months, and there isn't much about it. Then there is LambdaVM, which looks the most promising, as it compiles GHC byte-code to JVM bytecode. However, it doesn't look it has been updated in a few years. You can try your luck with any of those, but currently, if you want a decent FFI for Java, you're probably going to have to resurrect one of those projects.

--- James Miller

On 11 October 2011 15:26, Claude Lee wrote:

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Hi,

vote+1.

Theoretically, you can bridge Haskell and Java with FFI. It applys to small projects. Larger ones may need some build tools...

Claude

2011/10/11 dokondr

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Hi, I need to call Stanford NLP Parser from Haskell (unfortunately Haskell does not have a similar one): http://nlp.stanford.edu/software/lex-parser.shtml

What would be the most reliable framework for this?

Thanks! Dmitri

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-- JP Moresmau http://jpmoresmau.blogspot.com/

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