inline-java: Java interop via inline Java code in Haskell modules.

[ bsd3, deprecated, ffi, java, jvm, library ] [ Propose Tags ]

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Versions [RSS] [faq] 0.1, 0.5, 0.5.1, 0.6, 0.6.1, 0.6.2, 0.6.3, 0.6.4, 0.6.5, 0.7.0, 0.7.1, 0.7.2, 0.8.0, 0.8.1, 0.8.2, 0.8.3, 0.8.4, 0.9.0, 0.9.1, 0.10.0 (info)
Dependencies base (>=4.9.1 && <5), binary (>=0.7), bytestring (>=0.10), containers (>=0.5), distributed-closure (>=0.3), inline-c (>=0.5), singletons (>=2.0), text (>=1.2), thread-local-storage (>=0.1), vector (>=0.11) [details]
License BSD-3-Clause
Copyright 2015-2016 EURL Tweag.
Author Tweag I/O
Revised Revision 1 made by HerbertValerioRiedel at 2016-12-27T12:57:10Z
Category FFI, JVM, Java
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Source repo head: git clone
Uploaded by AlpMestanogullari at 2016-04-25T12:39:44Z
Distributions NixOS:0.10.0
Downloads 10208 total (81 in the last 30 days)
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Status Hackage Matrix CI
Docs not available [build log]
All reported builds failed as of 2016-11-26 [all 2 reports]


  • Foreign
    • Foreign.JNI
  • Language
    • Language.Java


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Readme for inline-java-0.1

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inline-java: Call any JVM function from Haskell

The Haskell standard includes a native foreign function interface (FFI). It can be a pain to use and in any case only C support is implemented in GHC. inline-java lets you call any JVM function directly, from Haskell, without the need to write your own foreign import declarations using the FFI. In the style of inline-c for C and inline-r for calling R, inline-java lets you name any function to call inline in your code.

This is an early tech preview, not production ready.

Quasiquotation to make inline calls in Java syntax not yet implemented. But calls in Haskell syntax supported.


Graphical Hello World using Java Swing:

{-# LANGUAGE DataKinds #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}

import Data.Text (Text)
import Language.Java

newtype JOptionPane = JOptionPane (J ('Class "javax.swing.JOptionPane"))
instance Coercible JOptionPane ('Class "javax.swing.JOptionPane")

main :: IO ()
main = withJVM [] $ do
    message <- reflect ("Hello World!" :: Text)
      (classOf (undefined :: JOptionPane))
      [JObject nullComponent, JObject (upcast message)]
    nullComponent :: J ('Class "java.awt.Component")
    nullComponent = jnull


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