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spring-dataspring-data-mongodbquerydsl

How to register custom Querydsl EntityPathResolver with Spring Data MongoRepositoryFactory?

I am using the Querydsl extension (QueryDslPredicateExecutor) to my CrudRepository.

To reliably exclude the generated Q classes from my test coverage measurements, they are generated into a dedicated querydsl subpackage of the respective domain classes (annotation processor option -Aquerydsl.packageSuffix=.querydsl).

Alas, this causes a ClassNotFoundException at application start up:

java.lang.IllegalArgumentException: Did not find a query class org.example.QDomain for domain class org.example.Domain!
        at org.springframework.data.querydsl.SimpleEntityPathResolver.createPath(SimpleEntityPathResolver.java:63)
        at org.springframework.data.mongodb.repository.support.QueryDslMongoRepository.<init>(QueryDslMongoRepository.java:85)
        at org.springframework.data.mongodb.repository.support.QueryDslMongoRepository.<init>(QueryDslMongoRepository.java:67)
    …
Caused by: java.lang.ClassNotFoundException: org.example.QDomain
    …

I have already located the EntityPathResolver interface that supposedly would allow me to plug in my own domain class to Q class mapping that inserts the .querydsl package suffix, but I haven’t found a way to configure Spring Data’s MongoRepositoryFactory to pick my own EntityPathResolver.

Is this possible?

Solution

  • Currently, the only way is to create your own variant of the MongoRepositoryFactory because the instance of the EntityPathResolver is hard-wired into it.