MongoTemplate Criteria Query

Question

I\'m generating a complicated Mongo query depending on multiple parameters. One of criterion that I want to make with Criteria helper class is:

Answer 1

Query query = new Query(Criteria.where("field1").exists(true).ne(false));

Or, if field1 is always a boolean value when present:

Query query = new Query(Criteria.where("field1").is(true));