Is Mapper a valid design pattern or is it a variation of the Factory . . . The Mapper is essentially a constructor inside out Suppose for a while, if you don't have a Mapper - when you need many seta of parameters they are all arguments on the constructor Now as things evolve, some applications are not aware of additional attributes that needs to go under constructor where one either computes it or use default
What does mapping mean in programming? - Software Engineering Stack . . . The programming uses of the verb "map" and the noun "mapper" are largely unrelated to their common uses in English, so this is a very understandable question The programming use is also very broad, so let's start with the most concrete and well-defined meaning of "map"
How do Repository and Data Mapper patterns work together? Data Mapper, presumably, has the standard "CRUD" interface, and nothing else But this suggests a problem How do you implement the query methods of the Repository? In particular, is the Repository only allowed to know about the DB through the Data Mappers? Whether or not that is the case, it seems there is a downside:
Best practices regarding type mapping and extension methods Converter Mapper class I create separate class that will handle conversions and implement methods that will take source class instance as an argument and return destination class instance