Purpose

The porpose of this repo is to both serve as an incubator for an offset pagination library and to showcase its usage

Offset Pagination

Ask for a page

Page arguments ( like pageNumber and pageSize ) are passed as arguments to the query. Those are then resolved by the library and the result is returned as a PageRequest object.

In the query one uses:

query {
    examplePaged(pageNumber:5 , pageSize: 10){
        
    }
}

Then in the controller one receives:

@QueryMapping("examplePaged")
public Page<Example> paged(PageRequest pageRequest) {
    return exampleRepository.findPage(
            pageRequest
    );
}

Implementation

For this to be possible, I implemented a TypeDefinitionConfigurer( PageTypeDefinitionConfigurer ) that adds the necessary fields to the schema. Also, A HandlerMethodArgumentResolver ( PageRequestHandlerMethodArgumentResolver ) was implemented to resolve the PageRequest object from the query arguments ( pageSize and pageNumber).