DATACMNS-1211 - Add ReactivePageableHandlerMethodArgumentResolver.

Add ReactivePageableHandlerMethodArgumentResolver and extract shared code from imperative PageableHandlerMethodArgumentResolver into PageableHandlerMethodArgumentResolverSupport.

Author: mp911de

src/main/java/org/springframework/data/web/PageableHandlerMethodArgumentResolverSupport.java

@@ -36,6 +36,8 @@
  * {@link #DEFAULT_PAGE_PARAMETER}{@link #DEFAULT_QUALIFIER_DELIMITER}.
  *
  * @since 2.1
+ * @see PageableHandlerMethodArgumentResolver
+ * @see ReactivePageableHandlerMethodArgumentResolver
  * @author Mark Paluch
  */
 public abstract class PageableHandlerMethodArgumentResolverSupport {

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

@@ -221,22 +221,24 @@ public void detectsFallbackPageableIfNullOneIsConfigured() {
 		assertThat(resolver.isFallbackPageable(PageRequest.of(0, 10))).isFalse();
 	}
 
-	private ReactivePageableHandlerMethodArgumentResolver getReactiveResolver() {
+	private static ReactivePageableHandlerMethodArgumentResolver getReactiveResolver() {
 
 		ReactivePageableHandlerMethodArgumentResolver resolver = new ReactivePageableHandlerMethodArgumentResolver();
 		resolver.setMaxPageSize(100);
 		return resolver;
 	}
 
-	private void assertSupportedAndResult(MethodParameter parameter, Pageable pageable) {
+	private static void assertSupportedAndResult(MethodParameter parameter, Pageable pageable) {
 		assertSupportedAndResult(parameter, pageable, TestUtils.getWebfluxRequest());
 	}
 
-	private void assertSupportedAndResult(MethodParameter parameter, Pageable pageable, MockServerHttpRequest request) {
+	private static void assertSupportedAndResult(MethodParameter parameter, Pageable pageable,
+			MockServerHttpRequest request) {
 		assertSupportedAndResult(parameter, pageable, request, getReactiveResolver());
 	}
 
-	private void assertSupportedAndResult(MethodParameter parameter, Pageable pageable, MockServerHttpRequest request,
+	private static void assertSupportedAndResult(MethodParameter parameter, Pageable pageable,
+			MockServerHttpRequest request,
 			SyncHandlerMethodArgumentResolver resolver) {
 
 		assertThat(resolver.supportsParameter(parameter)).isTrue();