$elemMatch multiple criteria support

[elogunov]

Correct me if I am wrong but as I can see current Morphia implementation of $elemMatch (i.e. FieldEnd#hasThisElement) doesn't support multiple criteria for array elements or multiple criteria for array of documents.
So there is no way to create such query using morphia:
db.restaurants.find({grades : { $elemMatch:{"score":{$gt : 80 , $lt :100}}}})
stackoverflow question

I didn't find any linked issues here.

[evanchooly]

If you can build and test the 'hasThisElement' branch, I have a fix that I think will get you what you need. Building on the existing tests, this is what the test for the new elemMatch() method looks like:

        Query<Keyword> query = getDs()
            .createQuery(Keyword.class)
            .filter("keyword = ", "Oscar")
            .filter("score = ", 12);
        assertNull(getDs().find(PhotoWithKeywords.class)
                          .field("keywords")
                          .elemMatch(query)
                          .get());