Java representation in Haskell

Hi, A friend is considering to start a project of building a generator of certain particular (pieces of) programs. The code generated is most likely to be Java. Anyone knows of a module that provides data structures and functions for representing and manipulating Java source code, so we don't have to start from scratch? It would be wonderful if the module also includes some "out-of-the-box" pretty-printing facilities for the representation. Thanks in advance. Paulo Sequeira