DATACMNS-1237 - Register additional ProxyingHandlerMethodArgumentResolver as first resolver.

We now deploy a custom BeanPostProcessor to customize RequestMappingHandlerAdapter instances by prepending a ProxyingHandlerMethodArgumentResolver (requiring a @ModelAttribute) to the list of resolved HandlerMethodArgumentResolvers to make sure the settings defined in the annotation are applied but the projecting way of data binding is still used.

src/test/java/org/springframework/data/web/ProxyingHandlerMethodArgumentResolverUnitTests.java

@@ -35,7 +35,7 @@ import org.springframework.data.web.ProjectingJackson2HttpMessageConverterUnitTe
 public class ProxyingHandlerMethodArgumentResolverUnitTests {
 
 	ProxyingHandlerMethodArgumentResolver resolver = new ProxyingHandlerMethodArgumentResolver(
-			new DefaultConversionService());
+			() -> new DefaultConversionService(), true);
 
 	@Test // DATACMNS-776
 	public void supportAnnotatedInterface() throws Exception {

src/test/java/org/springframework/data/web/config/EnableSpringDataWebSupportIntegrationTests.java

@@ -32,6 +32,7 @@ import org.springframework.data.geo.Distance;
 import org.springframework.data.geo.Point;
 import org.springframework.data.web.PageableHandlerMethodArgumentResolver;
 import org.springframework.data.web.PagedResourcesAssemblerArgumentResolver;
+import org.springframework.data.web.ProxyingHandlerMethodArgumentResolver;
 import org.springframework.data.web.SortHandlerMethodArgumentResolver;
 import org.springframework.data.web.WebTestUtils;
 import org.springframework.hateoas.Link;
@@ -204,6 +205,16 @@ public class EnableSpringDataWebSupportIntegrationTests {
 		assertThat((String) ReflectionTestUtils.getField(resolver, "sortParameter")).isEqualTo("foo");
 	}
 
+	@Test // DATACMNS-1237
+	public void configuresProxyingHandlerMethodArgumentResolver() {
+
+		ApplicationContext context = WebTestUtils.createApplicationContext(SampleConfig.class);
+
+		RequestMappingHandlerAdapter adapter = context.getBean(RequestMappingHandlerAdapter.class);
+
+		assertThat(adapter.getArgumentResolvers().get(0)).isInstanceOf(ProxyingHandlerMethodArgumentResolver.class);
+	}
+
 	private static void assertResolversRegistered(ApplicationContext context, Class<?>... resolverTypes) {
 
 		RequestMappingHandlerAdapter adapter = context.getBean(RequestMappingHandlerAdapter.class);