How to replace default SortArgumentResolver - spring

Question

I need to add private static final Sort sortById = new Sort(Sort.Direction.DESC, ID); to each Pageable. I guess, the best way to do that is to create decorator/adapter for SortArgumentResolver.
I've created class:
public class IdSortArgumentResolver implements SortArgumentResolver {
private static final String ID = "id";
private static final Sort sortById = new Sort(Sort.Direction.DESC, ID);
private final SortArgumentResolver delegate;
public IdSortArgumentResolverAdapter(SortArgumentResolver delegate) {
this.delegate = delegate;
}
#Override
public boolean supportsParameter(MethodParameter methodParameter) {
return delegate.supportsParameter(methodParameter);
}
#Override
public Sort resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) {
Sort sort = delegate.resolveArgument(parameter, mavContainer, webRequest, binderFactory);
if (isNull(sort)) {
return sortById;
}
if (containsSortById(sort)) {
return sort;
}
return sort.and(sortById);
}
private static boolean containsSortById(Sort currentSort) {
return StreamSupport.stream(currentSort.spliterator(), false)
.anyMatch(order -> ID.equalsIgnoreCase(order.getProperty()));
}
}
How can I change default SortArgumentResolver to IdSortArgumentResolver ? Is it possible? or maybe there is a better way to do that...
P.S It's spring-boot 1.5.2 RELEASE and current SortHandlerMethodArgumentResolver is configured in SpringDataWebConfiguration

Answer 1

Note: in your post, your class name is IdSortArgumentResolver but your constructor is IdSortArgumentResolverAdapter.
Create a configuration class extending WebMvcConfigurerAdapter:
#Configuration
public class WebMvcConfiguration extends WebMvcConfigurerAdapter {
// ...
}
Override the addArgumentResolvers method and configure your Sort and Pageable resolvers:
#Override
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
// FIXME Replace null with what you want
SortArgumentResolver sortResolver = new IdSortArgumentResolver(null);
// For sorting resolution alone
argumentResolver.add(sortResolver);
PageableHandlerMethodArgumentResolver pageableResolver = new PageableHandlerMethodArgumentResolver(sortResolver);
// For sorting resolution encapsulated inside a pageable
argumentResolver.add(pageableResolver);
}
Better solution without a custom class:
#Override
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
SortHandlerMethodArgumentResolver sortResolver = new SortHandlerMethodArgumentResolver();
sortResolver.setFallbackSort(new Sort(Sort.Direction.DESC, "id"));
// For sorting resolution alone
argumentResolver.add(sortResolver);
PageableHandlerMethodArgumentResolver pageableResolver = new PageableHandlerMethodArgumentResolver(sortResolver);
// For sorting resolution encapsulated inside a pageable
argumentResolver.add(pageableResolver);
}

Answer 2

Starting in spring-data-commons version 2.0, there is are 2 new classes that will make this kind of thing easier:
SortHandlerMethodArgumentResolverCustomizer
PageableHandlerMethodArgumentResolverCustomizer
Unfortunately that's not the version that ships with the current version of Spring Boot, so replace at your own risk.
#Bean SortHandlerMethodArgumentResolverCustomizer sortCustomizer() {
// s is SortHandlerMethodArgumentResolver
return s -> s.setPropertyDelimiter("<-->");
}
In this case, one would probably call resolveArgument to manipulate it.
Spring Data Web Support

Answer 3

for spring boot 2.2.1.RELEASE:
#Configuration
public class LocaleConfiguration implements WebMvcConfigurer {
#Override
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
SortHandlerMethodArgumentResolver sortArgumentResolver = new SortHandlerMethodArgumentResolver();
Sort defaultSort = Sort.by(new Sort.Order(Sort.Direction.DESC, "id"));
sortArgumentResolver.setFallbackSort(defaultSort);
PageableHandlerMethodArgumentResolver resolver = new PageableHandlerMethodArgumentResolver(sortArgumentResolver);
resolver.setOneIndexedParameters(true);
resolver.setMaxPageSize(20);
resolvers.add(resolver);
}
}