spring batch in grails

I am trying to setup the spring batch project (2.0M4 version) to run with grails (1.2)  I wanted to get the sample stuff up and running, so I created groovy files out of the various sample files that came with spring batch.  Unfortunately, the sample files use Java inner classes, which groovy can't handle yet.

For now, I will just make these Java files, but I was a little surprised since I thought just about any syntactically correct java file was a valid Groovy file.  Guess again.  You learn something every day.

  [groovyc] C:\grails_projects\ols\src\groovy\org\springframework\batch\sample\common\StagingItemWriter.groovy: 82: Unknown type: METHOD_DEF at line: 82 column:
 6. File: C:\grails_projects\ols\src\groovy\org\springframework\batch\sample\common\StagingItemWriter.groovy @ line 82, column 6.
  [groovyc]                                     public int getBatchSize() {
  [groovyc]         ^
  [groovyc]
  [groovyc] 2 errors