java - Why are people continuing to use xml mapping files instead of annotations? -

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I have seen strange facts (based on the questions given in the hibernate tag) that people are still actively using XML files

In some cases, where it is necessary: ​​

  • You are using the sections provided to you to specify their hibernate / jpa mapping for annotation. , And you want to map them.
  • You are writing an API, whose domain classes can be used without a JPA provider, so you do not want to force a JPA / Hibernate dependency.

But this is not in general matters, I think.

My assumptions are:

  • People are used for XML files and do not feel comfortable in them / don
  • Java pre 1.5 projects Is forced and nothing is about it
  • People do not know that annotation is a full-featured replacement of XML mapping.
  • Heritage systems are supported and therefore attitude is changing c
  • People are afraid that mix annotations with their classes are incorrect.

Any other possible explanation?

The domain layer and persistence layer are considered from a few different concerns, using two layers of pure XML approach Probably kept as loose couplings; Annotation joints using two layers more tightly, as you are strongly embedded in the code domain code.


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