Introduce ability to append queries against a particular collection [DATAMONGO-1151]

Heiko Scherrer opened DATAMONGO-1151 and commented

Task description
I request a feature that I couldn't find in the current implementation. Probably there's another elegant way to solve the requested behaviour. I need to append all queries to a particular collection with a specific criteria. Think about a multi-tenancy scenario where a discriminator property (holding the tenants name) has to be compared in each query. Doing this within application code is cumbersome and error-prone. IMO this should be applied somewhere deep in the framework, at best near to execution.

Investigation
I had a look at MongoTemplate and implemented a solution with a so called QueryAppender, that is able to add a criteria to a query (for a collection). Unfortunately MongoTemplate uses several alternatives within the finder methods. Some work with Query, others with DBObjects. So before opening Pandoras Box and implementing too many changes within MongoTemplate, I wanted to clarify that my approach might be a solution and no other solution already exists.

Affects: 1.6.2 (Evans SR2)

Issue Links:

• DATACMNS-293 Add infrastructure for generic query augmentation
  ("depends on")

• DATAJPA-307 Add support for soft deletes

• DATAJPA-564 Support for SpEL based parameter expressions in repository query methods