Emacs flymake syntax checking for XQL

[Klotz, Leigh]

I've whipped up an Emacs flymake integration for XQL.
It gives on-the-fly syntax checking with highlighted errors and mouseover explanations of error messages.
It works well with Suraj Acharya's xquery-mode for Emacs.

There are two parts: 
- a small Java command-line program which invokes the Saxon9 XQuery compiler and prints out errors and warnings
- a few lines of Emacs Lisp to glue it in to flymake

The command-line program uses Saxon9, but it could probably also be made to work with xqsharp with --static --explain as well.

It would be nice if vendors (Saxon, XQSharp?) would take the code as an example and write their own command-line options for easy syntax checking.  (For an example of this approach, see the "-emacs" flag in Ant, which formats one-per-line error messages easily parsed by Emacs users.)

Save this as XQLSyntaxCheck.java in a directory you will use permanently:
http://pastie.org/837838

Save this as xquery-flymake.el in your emacs directory.
http://pastie.org/837869

Save the Emacs XQuery mode by Suraj Acharya file to your emacs directory.
http://www.emacswiki.org/cgi-bin/wiki/xquery-mode.el

To use,
1. Save the files as described above 
2. Compile XQLSyntaxCheck.java.
3. Edit the xquery-flymake.el file to point to your Saxon9 installation and your XQLSyntaxCheck directory.
4. Compile xquery-flymake.el and xquery-mode.el (See note, below.)
5. Put these lines in your .emacs file:
(require 'xquery-mode)
(require 'flymake-xquery)

Note: I found that in order to get xquery-mode automatically set for .xql files I needed to edit xquery-mode.el line 62 and change apostrope to "l".  Otherwise, these features didn't take effect until I explicitly typed m-x xquery-mode.

Leigh.