Spring Data Rest - Configure pagination - json

Question

Using Spring Data REST with JPA in version 2.1.0.
How can I configure the pagination in order to have the page argument starting at index 1 instead of 0 ?
I have tried setting a custom HateoasPageableHandlerMethodArgumentResolver with an mvc:argument-resolvers, but that doesn't work:
<mvc:annotation-driven>
<mvc:argument-resolvers>
<bean class="org.springframework.data.web.HateoasPageableHandlerMethodArgumentResolver">
<property name="oneIndexedParameters" value="true"/>
</bean>
</mvc:argument-resolvers>
</mvc:annotation-driven>
Note that this behaviour is perfectly coherent with the documentation for mvc:argument-resolver that says:
Using this option does not override the built-in support for
resolving handler method arguments. To customize the built-in support
for argument resolution configure RequestMappingHandlerAdapter
directly.
But how can I achieve this ? If possible, in a clean and elegant way ?

Answer 1

The easiest way to do so is to subclass RepositoryRestMvcConfiguration and include your class into your configuration:
class CustomRestMvcConfiguration extends RepositoryRestMvcConfiguration {
#Override
#Bean
public HateoasPageableHandlerMethodArgumentResolver pageableResolver() {
HateoasPageableHandlerMethodArgumentResolver resolver = super.pageableResolver();
resolver.setOneIndexedParameters(true);
return resolver;
}
}
In your XML configuration, replace:
<bean class="….RepositoryRestMvcConfiguration" />
with
<bean class="….CustomRestMvcConfiguration" />
or import the custom class instead of the standard one in your JavaConfig file.

Answer 2

I have configured the RequestMappingHandlerAdapter using a BeanPostProcessor, however I believe that's neither clean, nor elegant. That looks more like a hack. There must be a better way ! I'm giving the code below just for reference.
public class RequestMappingHandlerAdapterCustomizer implements BeanPostProcessor {
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
if (bean instanceof RequestMappingHandlerAdapter) {
RequestMappingHandlerAdapter adapter = (RequestMappingHandlerAdapter)bean;
List<HandlerMethodArgumentResolver> customArgumentResolvers = adapter.getCustomArgumentResolvers();
if(customArgumentResolvers != null) {
for(HandlerMethodArgumentResolver customArgumentResolver : customArgumentResolvers) {
if(customArgumentResolver instanceof HateoasPageableHandlerMethodArgumentResolver) {
HateoasPageableHandlerMethodArgumentResolver hateoasPageableHandlerMethodArgumentResolver = (HateoasPageableHandlerMethodArgumentResolver)customArgumentResolver;
hateoasPageableHandlerMethodArgumentResolver.setOneIndexedParameters(true);
}
}
}
}
return bean;
}
public Object postProcessBeforeInitialization(Object bean, String beanName)
throws BeansException {
return bean;
}
}
<beans ...>
<bean class="util.spring.beanpostprocessors.RequestMappingHandlerAdapterCustomizer" />
</beans>

Answer 3

I use to do it using a customizer, which is something that they keep adding for more and more components with every new version:
#Bean
public PageableHandlerMethodArgumentResolverCustomizer pageableResolverCustomizer() {
return resolver -> resolver.setOneIndexedParameters(true);
}
You can put this in any #Configuration class, but ideally you should put it (with any other customization) in one that implements RepositoryRestConfigurer.