object oriented - What does mapping mean in programming?
Which is kind of the same mathematically speaking. So it might mean matching tables in a database with objects in code. Or performing an operation on each item in a list. A mapper is a …
Is "Mapper" a valid design pattern or is it a variation of the …
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. …
How do Repository and Data Mapper patterns work together?
Jun 28, 2023 · The problem there is that that now makes the Repository as dependent on the DB as the Data Mapper, which "feels wrong". The alternative is some other abstraction has to be …
Assembler vs Entity Translator and Entities vs DTO
Sep 29, 2015 · The mapper is implemented at the boundary of 2 domains, for instance in APIs to map between domain entities and DTOs. The mapper itself is often tightly coupled to each …
Should I mock ObjectMapper in my unit tests?
Sep 29, 2020 · He does not control it. The lib in question is also not slow or so slow that it would need to be mocked for performance, so I don't think it should be mocked. It could be replaced …
Best practices regarding type mapping and extension methods
Nov 3, 2015 · 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 …
programming practices - Calling repository inside a mapper
Feb 24, 2017 · I have a mapper class that maps a model to an entity for JPA. In order to keep repository calls within my service, it requires additional loops/code in order to get inside the …
java - Best way to handle lazy models with mapstruct and spring ...
Jan 5, 2021 · But here the problem, When mapper starts to convert Engine it will get LazyInitializationException since transaction was already committed and closed in service and …
Am I wrong in thinking that needing something like AutoMapper …
Automapper is an "object-object mapper" for .Net, which means copying objects from a class into another class that represents the same thing. Why is this ever useful? Is the duplication of …
How is intermediate data organized in MapReduce?
Feb 6, 2014 · From what I understand, each mapper outputs an intermediate file. The intermediate data (data contained in each intermediate file) is then sorted by key. Then, a …