On Wed, Jan 19, 2011 at 11:05:28AM -0800, Andi Vajda wrote:
>
> On Wed, 19 Jan 2011, Eric Hall wrote:
>
> > I'd like to store some index metadata using
> >
> > IndexWriter.commit(Map<String,String> commitUserData)
> >
> > I've set up a python dict with string to string mappings,
> >but if I use that I get an InvalidArgsError. Is there a different
> >python type to use in this call?
>
> Yes, use a Java HashMap for which there is a Python wrapper in PyLucene:
>
> >>> import lucene
> >>> lucene.initVM()
> <jcc.JCCEnv object at 0x10040a0d8>
> >>> a = lucene.HashMap().of_(lucene.String, lucene.String)
> >>> a.put('foo', 'bar')
> >>> a
> <HashMap: {foo=bar}>
>
> The use of the of_() method is optional but it conveys the <String, String>
> part and helps with enforcing the generic parameter and return type for the
> map's methods.
>
> If you'd rather use a Python dict directly, see the example in PyLucene's
> python/collections.py module where a Python set is wrapped by a class
> called JavaSet. The same could be implemented for the java.util.Map
> interface.
Tha HashMap()... method works fine for storing the metadata, and luke
shows that its there. Of course getting the metadata back for later
comparison/display is also useful, and seemed like it would be
straightforward.... Naturally its not working using:
indexMetaDataHashMap = reader.getCommitUserData()
I get an empty hashmap back from the above. I also tried using:
indexCommit = reader.getIndexCommit
indexMetaDataHashMap = indexCommit.getUserData()
with the same result (empty hashmap). Is there a different way to do this?
Thanks again,
-eric
