Add BindingContext

This commit adds a BindingContext to be used in spring-web-reactive
@RequestMapping infrastructure (comparable to WebDataBinderFactory in
spring-web-mvc) for access to the default model, data binding,
validation, and type conversion purposes.

Issue: SPR-14541

spring-web-reactive/src/main/java/org/springframework/web/reactive/result/method/BindingContext.java

+/*
+ * Copyright 2002-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.web.reactive.result.method;
+
+import reactor.core.publisher.Mono;
+
+import org.springframework.ui.ModelMap;
+import org.springframework.validation.support.BindingAwareModelMap;
+import org.springframework.web.bind.WebDataBinder;
+import org.springframework.web.bind.WebExchangeDataBinder;
+import org.springframework.web.bind.support.WebBindingInitializer;
+import org.springframework.web.server.ServerWebExchange;
+
+/**
+ * A context for binding requests to method arguments that provides access to
+ * the default model, data binding, validation, and type conversion.
+ *
+ * @author Rossen Stoyanchev
+ * @since 5.0
+ */
+public class BindingContext {
+
+	private final ModelMap model = new BindingAwareModelMap();
+
+	private final WebBindingInitializer initializer;
+
+
+	public BindingContext() {
+		this(null);
+	}
+
+	public BindingContext(WebBindingInitializer initializer) {
+		this.initializer = initializer;
+	}
+
+
+	/**
+	 * Return the default model.
+	 */
+	public ModelMap getModel() {
+		return this.model;
+	}
+
+	/**
+	 * Create a {@link WebExchangeDataBinder} for the given object.
+	 * @param exchange the current exchange
+	 * @param target the object to create a data binder for, or {@code null} if
+	 * creating a binder for a simple type
+	 * @param objectName the name of the target object
+	 * @return a Mono for the created {@link WebDataBinder} instance
+	 */
+	public Mono<WebExchangeDataBinder> createBinder(ServerWebExchange exchange, Object target,
+			String objectName) {
+
+		WebExchangeDataBinder dataBinder = createBinderInstance(target, objectName);
+		if (this.initializer != null) {
+			this.initializer.initBinder(dataBinder);
+		}
+		return initBinder(dataBinder, exchange);
+	}
+
+	protected WebExchangeDataBinder createBinderInstance(Object target, String objectName) {
+		return new WebExchangeDataBinder(target, objectName);
+	}
+
+	protected Mono<WebExchangeDataBinder> initBinder(WebExchangeDataBinder dataBinder, ServerWebExchange exchange) {
+		return Mono.just(dataBinder);
+	}
+
+}

spring-web-reactive/src/main/java/org/springframework/web/reactive/result/method/HandlerMethodArgumentResolver.java

@@ -19,11 +19,13 @@ package org.springframework.web.reactive.result.method;
 import reactor.core.publisher.Mono;
 
 import org.springframework.core.MethodParameter;
-import org.springframework.ui.ModelMap;
 import org.springframework.web.server.ServerWebExchange;
 
 
 /**
+ * Strategy interface for resolving method parameters into argument values in
+ * the context of a given request.
+ *
  * @author Rossen Stoyanchev
  * @since 5.0
  */
@@ -37,9 +39,10 @@ public interface HandlerMethodArgumentResolver {
 	 * does not resolve to any value, which will result in {@code null} passed
 	 * as the argument value.
 	 * @param parameter the method parameter
-	 * @param model the implicit model for request handling
+	 * @param bindingContext the binding context to use
 	 * @param exchange the current exchange
 	 */
-	Mono<Object> resolveArgument(MethodParameter parameter, ModelMap model, ServerWebExchange exchange);
+	Mono<Object> resolveArgument(MethodParameter parameter, BindingContext bindingContext,
+			ServerWebExchange exchange);
 
 }

spring-web-reactive/src/main/java/org/springframework/web/reactive/result/method/InvocableHandlerMethod.java

@@ -81,18 +81,19 @@ public class InvocableHandlerMethod extends HandlerMethod {
 	/**
 	 * Invoke the method and return a Publisher for the return value.
 	 * @param exchange the current exchange
-	 * @param model the model for request handling
+	 * @param bindingContext the binding context to use
 	 * @param providedArgs optional list of argument values to check by type
 	 * (via {@code instanceof}) for resolving method arguments.
 	 * @return Publisher that produces a single HandlerResult or an error signal;
 	 * never throws an exception
 	 */
-	public Mono<HandlerResult> invokeForRequest(ServerWebExchange exchange, ModelMap model,
-			Object... providedArgs) {
+	public Mono<HandlerResult> invokeForRequest(ServerWebExchange exchange,
+			BindingContext bindingContext, Object... providedArgs) {
 
-		return resolveArguments(exchange, model, providedArgs).then(args -> {
+		return resolveArguments(exchange, bindingContext, providedArgs).then(args -> {
 			try {
 				Object value = doInvoke(args);
+				ModelMap model = bindingContext.getModel();
 				HandlerResult handlerResult = new HandlerResult(this, value, getReturnType(), model);
 				return Mono.just(handlerResult);
 			}
@@ -106,7 +107,9 @@ public class InvocableHandlerMethod extends HandlerMethod {
 		});
 	}
 
-	private Mono<Object[]> resolveArguments(ServerWebExchange exchange, ModelMap model, Object... providedArgs) {
+	private Mono<Object[]> resolveArguments(ServerWebExchange exchange,
+			BindingContext bindingContext, Object... providedArgs) {
+
 		if (ObjectUtils.isEmpty(getMethodParameters())) {
 			return NO_ARGS;
 		}
@@ -127,7 +130,7 @@ public class InvocableHandlerMethod extends HandlerMethod {
 								.findFirst()
 								.orElseThrow(() -> getArgError("No resolver for ", param, null));
 						try {
-							return resolver.resolveArgument(param, model, exchange)
+							return resolver.resolveArgument(param, bindingContext, exchange)
 									.defaultIfEmpty(NO_VALUE)
 									.doOnError(cause -> {
 										if(logger.isDebugEnabled()) {

spring-web-reactive/src/main/java/org/springframework/web/reactive/result/method/annotation/AbstractNamedValueMethodArgumentResolver.java

@@ -32,6 +32,7 @@ import org.springframework.core.convert.ConversionService;
 import org.springframework.ui.ModelMap;
 import org.springframework.util.Assert;
 import org.springframework.web.bind.annotation.ValueConstants;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver;
 import org.springframework.web.server.ServerErrorException;
 import org.springframework.web.server.ServerWebExchange;
@@ -85,7 +86,9 @@ public abstract class AbstractNamedValueMethodArgumentResolver implements Handle
 
 
 	@Override
-	public Mono<Object> resolveArgument(MethodParameter parameter, ModelMap model, ServerWebExchange exchange) {
+	public Mono<Object> resolveArgument(MethodParameter parameter, BindingContext bindingContext,
+			ServerWebExchange exchange) {
+
 		NamedValueInfo namedValueInfo = getNamedValueInfo(parameter);
 		MethodParameter nestedParameter = parameter.nestedIfOptional();
 
@@ -95,6 +98,8 @@ public abstract class AbstractNamedValueMethodArgumentResolver implements Handle
 					"Specified name must not resolve to null: [" + namedValueInfo.name + "]"));
 		}
 
+		ModelMap model = bindingContext.getModel();
+
 		return resolveName(resolvedName.toString(), nestedParameter, exchange)
 				.map(arg -> {
 					if ("".equals(arg) && namedValueInfo.defaultValue != null) {

spring-web-reactive/src/main/java/org/springframework/web/reactive/result/method/annotation/HttpEntityArgumentResolver.java

@@ -27,8 +27,8 @@ import org.springframework.http.HttpHeaders;
 import org.springframework.http.RequestEntity;
 import org.springframework.http.codec.HttpMessageReader;
 import org.springframework.http.server.reactive.ServerHttpRequest;
-import org.springframework.ui.ModelMap;
 import org.springframework.validation.Validator;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver;
 import org.springframework.web.server.ServerWebExchange;
 
@@ -73,7 +73,8 @@ public class HttpEntityArgumentResolver extends AbstractMessageReaderArgumentRes
 	}
 
 	@Override
-	public Mono<Object> resolveArgument(MethodParameter param, ModelMap model, ServerWebExchange exchange) {
+	public Mono<Object> resolveArgument(MethodParameter param, BindingContext bindingContext,
+			ServerWebExchange exchange) {
 
 		ResolvableType entityType = ResolvableType.forMethodParameter(param);
 		MethodParameter bodyParameter = new MethodParameter(param);

spring-web-reactive/src/main/java/org/springframework/web/reactive/result/method/annotation/ModelArgumentResolver.java

@@ -19,7 +19,7 @@ import reactor.core.publisher.Mono;
 
 import org.springframework.core.MethodParameter;
 import org.springframework.ui.Model;
-import org.springframework.ui.ModelMap;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver;
 import org.springframework.web.server.ServerWebExchange;
 
@@ -38,8 +38,10 @@ public class ModelArgumentResolver implements HandlerMethodArgumentResolver {
 	}
 
 	@Override
-	public Mono<Object> resolveArgument(MethodParameter parameter, ModelMap model, ServerWebExchange exchange) {
-		return Mono.just(model);
+	public Mono<Object> resolveArgument(MethodParameter parameter, BindingContext bindingContext,
+			ServerWebExchange exchange) {
+
+		return Mono.just(bindingContext.getModel());
 	}
 
 }

spring-web-reactive/src/main/java/org/springframework/web/reactive/result/method/annotation/PathVariableMapMethodArgumentResolver.java

@@ -23,10 +23,10 @@ import java.util.Optional;
 import reactor.core.publisher.Mono;
 
 import org.springframework.core.MethodParameter;
-import org.springframework.ui.ModelMap;
 import org.springframework.util.StringUtils;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.reactive.HandlerMapping;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver;
 import org.springframework.web.server.ServerWebExchange;
 
@@ -54,7 +54,7 @@ public class PathVariableMapMethodArgumentResolver implements HandlerMethodArgum
 	 * Return a Map with all URI template variables or an empty map.
 	 */
 	@Override
-	public Mono<Object> resolveArgument(MethodParameter parameter, ModelMap model,
+	public Mono<Object> resolveArgument(MethodParameter parameter, BindingContext bindingContext,
 			ServerWebExchange exchange) {
 
 		String name = HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE;

spring-web-reactive/src/main/java/org/springframework/web/reactive/result/method/annotation/RequestBodyArgumentResolver.java

@@ -23,9 +23,9 @@ import reactor.core.publisher.Mono;
 import org.springframework.core.MethodParameter;
 import org.springframework.core.ReactiveAdapterRegistry;
 import org.springframework.http.codec.HttpMessageReader;
-import org.springframework.ui.ModelMap;
 import org.springframework.validation.Validator;
 import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.ServerWebInputException;
@@ -76,7 +76,9 @@ public class RequestBodyArgumentResolver extends AbstractMessageReaderArgumentRe
 	}
 
 	@Override
-	public Mono<Object> resolveArgument(MethodParameter param, ModelMap model, ServerWebExchange exchange) {
+	public Mono<Object> resolveArgument(MethodParameter param, BindingContext bindingContext,
+			ServerWebExchange exchange) {
+
 		boolean isRequired = param.getParameterAnnotation(RequestBody.class).required();
 		return readBody(param, isRequired, exchange);
 	}

spring-web-reactive/src/main/java/org/springframework/web/reactive/result/method/annotation/RequestHeaderMapMethodArgumentResolver.java

@@ -22,9 +22,9 @@ import reactor.core.publisher.Mono;
 
 import org.springframework.core.MethodParameter;
 import org.springframework.http.HttpHeaders;
-import org.springframework.ui.ModelMap;
 import org.springframework.util.MultiValueMap;
 import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver;
 import org.springframework.web.server.ServerWebExchange;
 
@@ -50,7 +50,9 @@ public class RequestHeaderMapMethodArgumentResolver implements HandlerMethodArgu
 	}
 
 	@Override
-	public Mono<Object> resolveArgument(MethodParameter parameter, ModelMap model, ServerWebExchange exchange) {
+	public Mono<Object> resolveArgument(MethodParameter parameter, BindingContext bindingContext,
+			ServerWebExchange exchange) {
+
 		HttpHeaders headers = exchange.getRequest().getHeaders();
 		if (MultiValueMap.class.isAssignableFrom(parameter.getParameterType())) {
 			return Mono.just(headers);

spring-web-reactive/src/main/java/org/springframework/web/reactive/result/method/annotation/RequestMappingHandlerAdapter.java

@@ -38,14 +38,13 @@ import org.springframework.core.convert.ConversionService;
 import org.springframework.format.support.DefaultFormattingConversionService;
 import org.springframework.http.codec.DecoderHttpMessageReader;
 import org.springframework.http.codec.HttpMessageReader;
-import org.springframework.ui.ExtendedModelMap;
-import org.springframework.ui.ModelMap;
 import org.springframework.validation.Validator;
 import org.springframework.web.bind.support.WebBindingInitializer;
 import org.springframework.web.method.HandlerMethod;
 import org.springframework.web.method.annotation.ExceptionHandlerMethodResolver;
 import org.springframework.web.reactive.HandlerAdapter;
 import org.springframework.web.reactive.HandlerResult;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver;
 import org.springframework.web.reactive.result.method.InvocableHandlerMethod;
 import org.springframework.web.server.ServerWebExchange;
@@ -257,14 +256,16 @@ public class RequestMappingHandlerAdapter implements HandlerAdapter, BeanFactory
 		HandlerMethod handlerMethod = (HandlerMethod) handler;
 		InvocableHandlerMethod invocable = new InvocableHandlerMethod(handlerMethod);
 		invocable.setHandlerMethodArgumentResolvers(getArgumentResolvers());
-		ModelMap model = new ExtendedModelMap();
-		return invocable.invokeForRequest(exchange, model)
-				.map(result -> result.setExceptionHandler(ex -> handleException(ex, handlerMethod, exchange)))
-				.otherwise(ex -> handleException(ex, handlerMethod, exchange));
+		BindingContext bindingContext = new BindingContext(getWebBindingInitializer());
+		return invocable.invokeForRequest(exchange, bindingContext)
+				.map(result -> result.setExceptionHandler(
+						ex -> handleException(ex, handlerMethod, bindingContext, exchange)))
+				.otherwise(ex -> handleException(
+						ex, handlerMethod, bindingContext, exchange));
 	}
 
 	private Mono<HandlerResult> handleException(Throwable ex, HandlerMethod handlerMethod,
-			ServerWebExchange exchange) {
+			BindingContext bindingContext, ServerWebExchange exchange) {
 
 		if (ex instanceof Exception) {
 			InvocableHandlerMethod invocable = findExceptionHandler(handlerMethod, (Exception) ex);
@@ -274,8 +275,8 @@ public class RequestMappingHandlerAdapter implements HandlerAdapter, BeanFactory
 						logger.debug("Invoking @ExceptionHandler method: " + invocable);
 					}
 					invocable.setHandlerMethodArgumentResolvers(getArgumentResolvers());
-					ExtendedModelMap errorModel = new ExtendedModelMap();
-					return invocable.invokeForRequest(exchange, errorModel, ex);
+					bindingContext.getModel().clear();
+					return invocable.invokeForRequest(exchange, bindingContext, ex);
 				}
 				catch (Exception invocationEx) {
 					if (logger.isErrorEnabled()) {

spring-web-reactive/src/main/java/org/springframework/web/reactive/result/method/annotation/RequestParamMapMethodArgumentResolver.java

@@ -21,10 +21,10 @@ import java.util.Map;
 import reactor.core.publisher.Mono;
 
 import org.springframework.core.MethodParameter;
-import org.springframework.ui.ModelMap;
 import org.springframework.util.MultiValueMap;
 import org.springframework.util.StringUtils;
 import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver;
 import org.springframework.web.server.ServerWebExchange;
 
@@ -57,7 +57,9 @@ public class RequestParamMapMethodArgumentResolver implements HandlerMethodArgum
 	}
 
 	@Override
-	public Mono<Object> resolveArgument(MethodParameter parameter, ModelMap model, ServerWebExchange exchange) {
+	public Mono<Object> resolveArgument(MethodParameter parameter, BindingContext bindingContext,
+			ServerWebExchange exchange) {
+
 		Class<?> paramType = parameter.getParameterType();
 		MultiValueMap<String, String> queryParams = exchange.getRequest().getQueryParams();
 		if (MultiValueMap.class.isAssignableFrom(paramType)) {

spring-web-reactive/src/main/java/org/springframework/web/reactive/result/method/annotation/ServerWebExchangeArgumentResolver.java

@@ -21,7 +21,7 @@ import org.springframework.core.MethodParameter;
 import org.springframework.http.HttpMethod;
 import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.http.server.reactive.ServerHttpResponse;
-import org.springframework.ui.ModelMap;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.WebSession;
@@ -52,7 +52,9 @@ public class ServerWebExchangeArgumentResolver implements HandlerMethodArgumentR
 	}
 
 	@Override
-	public Mono<Object> resolveArgument(MethodParameter parameter, ModelMap model, ServerWebExchange exchange) {
+	public Mono<Object> resolveArgument(MethodParameter parameter, BindingContext bindingContext,
+			ServerWebExchange exchange) {
+
 		Class<?> paramType = parameter.getParameterType();
 		if (ServerWebExchange.class.isAssignableFrom(paramType)) {
 			return Mono.just(exchange);

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/InvocableHandlerMethodTests.java

@@ -26,8 +26,6 @@ import org.springframework.http.HttpMethod;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpRequest;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpResponse;
 import org.springframework.tests.TestSubscriber;
-import org.springframework.ui.ExtendedModelMap;
-import org.springframework.ui.ModelMap;
 import org.springframework.web.reactive.HandlerResult;
 import org.springframework.web.reactive.result.ResolvableMethod;
 import org.springframework.web.server.ServerWebExchange;
@@ -50,8 +48,6 @@ public class InvocableHandlerMethodTests {
 
 	private ServerWebExchange exchange;
 
-	private ModelMap model = new ExtendedModelMap();
-
 
 	@Before
 	public void setUp() throws Exception {
@@ -65,7 +61,7 @@ public class InvocableHandlerMethodTests {
 	@Test
 	public void invokeMethodWithNoArguments() throws Exception {
 		InvocableHandlerMethod hm = handlerMethod("noArgs");
-		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, this.model);
+		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, new BindingContext());
 
 		assertHandlerResultValue(mono, "success");
 	}
@@ -74,7 +70,7 @@ public class InvocableHandlerMethodTests {
 	public void invokeMethodWithNoValue() throws Exception {
 		InvocableHandlerMethod hm = handlerMethod("singleArg");
 		addResolver(hm, Mono.empty());
-		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, this.model);
+		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, new BindingContext());
 
 		assertHandlerResultValue(mono, "success:null");
 	}
@@ -83,7 +79,7 @@ public class InvocableHandlerMethodTests {
 	public void invokeMethodWithValue() throws Exception {
 		InvocableHandlerMethod hm = handlerMethod("singleArg");
 		addResolver(hm, Mono.just("value1"));
-		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, this.model);
+		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, new BindingContext());
 
 		assertHandlerResultValue(mono, "success:value1");
 	}
@@ -91,7 +87,7 @@ public class InvocableHandlerMethodTests {
 	@Test
 	public void noMatchingResolver() throws Exception {
 		InvocableHandlerMethod hm = handlerMethod("singleArg");
-		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, this.model);
+		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, new BindingContext());
 
 		TestSubscriber.subscribe(mono)
 				.assertError(IllegalStateException.class)
@@ -103,7 +99,7 @@ public class InvocableHandlerMethodTests {
 	public void resolverThrowsException() throws Exception {
 		InvocableHandlerMethod hm = handlerMethod("singleArg");
 		addResolver(hm, Mono.error(new UnsupportedMediaTypeStatusException("boo")));
-		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, this.model);
+		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, new BindingContext());
 
 		TestSubscriber.subscribe(mono)
 				.assertError(UnsupportedMediaTypeStatusException.class)
@@ -114,7 +110,7 @@ public class InvocableHandlerMethodTests {
 	public void illegalArgumentExceptionIsWrappedWithInvocationDetails() throws Exception {
 		InvocableHandlerMethod hm = handlerMethod("singleArg");
 		addResolver(hm, Mono.just(1));
-		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, this.model);
+		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, new BindingContext());
 
 		TestSubscriber.subscribe(mono)
 				.assertError(IllegalStateException.class)
@@ -126,7 +122,7 @@ public class InvocableHandlerMethodTests {
 	@Test
 	public void invocationTargetExceptionIsUnwrapped() throws Exception {
 		InvocableHandlerMethod hm = handlerMethod("exceptionMethod");
-		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, this.model);
+		Mono<HandlerResult> mono = hm.invokeForRequest(this.exchange, new BindingContext());
 
 		TestSubscriber.subscribe(mono)
 				.assertError(IllegalStateException.class)

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/RequestMappingInfoHandlerMappingTests.java

@@ -35,13 +35,11 @@ import org.springframework.core.annotation.AnnotationUtils;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
 import org.springframework.http.MediaType;
+import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpRequest;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpResponse;
-import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.stereotype.Controller;
 import org.springframework.tests.TestSubscriber;
-import org.springframework.ui.ExtendedModelMap;
-import org.springframework.ui.ModelMap;
 import org.springframework.util.MultiValueMap;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PutMapping;
@@ -376,8 +374,9 @@ public class RequestMappingInfoHandlerMappingTests {
 		ServerWebExchange exchange = createExchange(HttpMethod.OPTIONS, requestURI);
 		HandlerMethod handlerMethod = (HandlerMethod) this.handlerMapping.getHandler(exchange).block();
 
-		ModelMap model = new ExtendedModelMap();
-		Mono<HandlerResult> mono = new InvocableHandlerMethod(handlerMethod).invokeForRequest(exchange, model);
+		BindingContext bindingContext = new BindingContext();
+		InvocableHandlerMethod invocable = new InvocableHandlerMethod(handlerMethod);
+		Mono<HandlerResult> mono = invocable.invokeForRequest(exchange, bindingContext);
 
 		HandlerResult result = mono.block();
 		assertNotNull(result);

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/annotation/CookieValueMethodArgumentResolverTests.java

@@ -34,6 +34,7 @@ import org.springframework.mock.http.server.reactive.test.MockServerHttpResponse
 import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.tests.TestSubscriber;
 import org.springframework.web.bind.annotation.CookieValue;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.ServerWebInputException;
 import org.springframework.web.server.adapter.DefaultServerWebExchange;
@@ -59,6 +60,8 @@ public class CookieValueMethodArgumentResolverTests {
 	private MethodParameter cookieStringParameter;
 	private MethodParameter stringParameter;
 
+	private BindingContext bindingContext = new BindingContext();
+
 
 	@Before
 	public void setUp() throws Exception {
@@ -90,7 +93,9 @@ public class CookieValueMethodArgumentResolverTests {
 		HttpCookie expected = new HttpCookie("name", "foo");
 		this.exchange.getRequest().getCookies().add(expected.getName(), expected);
 
-		Mono<Object> mono = this.resolver.resolveArgument(this.cookieParameter, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.cookieParameter, this.bindingContext, this.exchange);
+
 		assertEquals(expected, mono.block());
 	}
 
@@ -99,14 +104,16 @@ public class CookieValueMethodArgumentResolverTests {
 		HttpCookie cookie = new HttpCookie("name", "foo");
 		this.exchange.getRequest().getCookies().add(cookie.getName(), cookie);
 
-		Mono<Object> mono = this.resolver.resolveArgument(this.cookieStringParameter, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.cookieStringParameter, this.bindingContext, this.exchange);
+
 		assertEquals("Invalid result", cookie.getValue(), mono.block());
 	}
 
 	@Test
 	public void resolveCookieDefaultValue() {
-		Mono<Object> mono = this.resolver.resolveArgument(this.cookieStringParameter, null, this.exchange);
-		Object result = mono.block();
+		Object result = this.resolver.resolveArgument(
+				this.cookieStringParameter, this.bindingContext, this.exchange).block();
 
 		assertTrue(result instanceof String);
 		assertEquals("bar", result);
@@ -114,7 +121,7 @@ public class CookieValueMethodArgumentResolverTests {
 
 	@Test
 	public void notFound() {
-		Mono<Object> mono = resolver.resolveArgument(this.cookieParameter, null, this.exchange);
+		Mono<Object> mono = resolver.resolveArgument(this.cookieParameter, this.bindingContext, this.exchange);
 		TestSubscriber
 				.subscribe(mono)
 				.assertError(ServerWebInputException.class);

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/annotation/ExpressionValueMethodArgumentResolverTests.java

@@ -31,6 +31,7 @@ import org.springframework.http.HttpMethod;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpRequest;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpResponse;
 import org.springframework.http.server.reactive.ServerHttpRequest;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.adapter.DefaultServerWebExchange;
 import org.springframework.web.server.session.MockWebSessionManager;
@@ -82,7 +83,9 @@ public class ExpressionValueMethodArgumentResolverTests {
 	public void resolveSystemProperty() throws Exception {
 		System.setProperty("systemProperty", "22");
 		try {
-			Mono<Object> mono = this.resolver.resolveArgument(this.paramSystemProperty, null, this.exchange);
+			Mono<Object> mono = this.resolver.resolveArgument(
+					this.paramSystemProperty,  new BindingContext(), this.exchange);
+
 			Object value = mono.block();
 			assertEquals(22, value);
 		}

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/annotation/HttpEntityArgumentResolverTests.java

@@ -46,9 +46,9 @@ import org.springframework.http.codec.HttpMessageReader;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpRequest;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpResponse;
 import org.springframework.tests.TestSubscriber;
-import org.springframework.ui.ExtendedModelMap;
 import org.springframework.validation.Validator;
 import org.springframework.web.reactive.result.ResolvableMethod;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.ServerWebInputException;
 import org.springframework.web.server.adapter.DefaultServerWebExchange;
@@ -304,7 +304,7 @@ public class HttpEntityArgumentResolverTests {
 		this.request.setBody(body);
 
 		MethodParameter param = this.testMethod.resolveParam(type);
-		Mono<Object> result = this.resolver.resolveArgument(param, new ExtendedModelMap(), this.exchange);
+		Mono<Object> result = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		Object value = result.block(Duration.ofSeconds(5));
 
 		assertNotNull(value);
@@ -317,7 +317,7 @@ public class HttpEntityArgumentResolverTests {
 	@SuppressWarnings("unchecked")
 	private <T> HttpEntity<T> resolveValueWithEmptyBody(ResolvableType type) {
 		MethodParameter param = this.testMethod.resolveParam(type);
-		Mono<Object> result = this.resolver.resolveArgument(param, new ExtendedModelMap(), this.exchange);
+		Mono<Object> result = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		HttpEntity<String> httpEntity = (HttpEntity<String>) result.block(Duration.ofSeconds(5));
 
 		assertEquals(this.request.getHeaders(), httpEntity.getHeaders());

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/annotation/MessageReaderArgumentResolverTests.java

@@ -18,8 +18,6 @@ package org.springframework.web.reactive.result.method.annotation;
 
 import java.io.Serializable;
 import java.lang.reflect.Method;
-import java.nio.ByteBuffer;
-import java.nio.charset.StandardCharsets;
 import java.time.Duration;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -41,8 +39,6 @@ import rx.Single;
 import org.springframework.core.MethodParameter;
 import org.springframework.core.ResolvableType;
 import org.springframework.core.codec.Decoder;
-import org.springframework.core.io.buffer.DataBuffer;
-import org.springframework.core.io.buffer.DefaultDataBufferFactory;
 import org.springframework.http.HttpMethod;
 import org.springframework.http.codec.DecoderHttpMessageReader;
 import org.springframework.http.codec.HttpMessageReader;
@@ -61,8 +57,12 @@ import org.springframework.web.server.UnsupportedMediaTypeStatusException;
 import org.springframework.web.server.adapter.DefaultServerWebExchange;
 import org.springframework.web.server.session.MockWebSessionManager;
 
-import static org.junit.Assert.*;
-import static org.springframework.core.ResolvableType.*;
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.springframework.core.ResolvableType.forClass;
+import static org.springframework.core.ResolvableType.forClassWithGenerics;
 
 /**
  * Unit tests for {@link AbstractMessageReaderArgumentResolver}.
@@ -302,12 +302,6 @@ public class MessageReaderArgumentResolverTests {
 		return new AbstractMessageReaderArgumentResolver(readers, new TestBeanValidator()) {};
 	}
 
-	private DataBuffer dataBuffer(String body) {
-		byte[] bytes = body.getBytes(StandardCharsets.UTF_8);
-		ByteBuffer byteBuffer = ByteBuffer.wrap(bytes);
-		return new DefaultDataBufferFactory().wrap(byteBuffer);
-	}
-
 
 	@SuppressWarnings("unused")
 	private void handle(

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/annotation/PathVariableMapMethodArgumentResolverTests.java

@@ -27,12 +27,12 @@ import reactor.core.publisher.Mono;
 
 import org.springframework.core.MethodParameter;
 import org.springframework.http.HttpMethod;
+import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpRequest;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpResponse;
-import org.springframework.http.server.reactive.ServerHttpRequest;
-import org.springframework.ui.ModelMap;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.reactive.HandlerMapping;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.adapter.DefaultServerWebExchange;
 import org.springframework.web.server.session.MockWebSessionManager;
@@ -86,7 +86,7 @@ public class PathVariableMapMethodArgumentResolverTests {
 		uriTemplateVars.put("name2", "value2");
 		this.exchange.getAttributes().put(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE, uriTemplateVars);
 
-		Mono<Object> mono = this.resolver.resolveArgument(this.paramMap, new ModelMap(), this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(this.paramMap, new BindingContext(), this.exchange);
 		Object result = mono.block();
 
 		assertEquals(uriTemplateVars, result);
@@ -94,7 +94,7 @@ public class PathVariableMapMethodArgumentResolverTests {
 
 	@Test
 	public void resolveArgumentNoUriVars() throws Exception {
-		Mono<Object> mono = this.resolver.resolveArgument(this.paramMap, new ModelMap(), this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(this.paramMap, new BindingContext(), this.exchange);
 		Object result = mono.block();
 
 		assertEquals(Collections.emptyMap(), result);

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/annotation/PathVariableMethodArgumentResolverTests.java

@@ -30,14 +30,14 @@ import org.springframework.core.annotation.SynthesizingMethodParameter;
 import org.springframework.core.convert.ConversionService;
 import org.springframework.core.convert.support.DefaultConversionService;
 import org.springframework.http.HttpMethod;
+import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpRequest;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpResponse;
-import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.tests.TestSubscriber;
-import org.springframework.ui.ModelMap;
 import org.springframework.util.ReflectionUtils;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.reactive.HandlerMapping;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.server.ServerErrorException;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.adapter.DefaultServerWebExchange;
@@ -98,7 +98,8 @@ public class PathVariableMethodArgumentResolverTests {
 		uriTemplateVars.put("name", "value");
 		this.exchange.getAttributes().put(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE, uriTemplateVars);
 
-		Mono<Object> mono = this.resolver.resolveArgument(this.paramNamedString, new ModelMap(), this.exchange);
+		BindingContext bindingContext = new BindingContext();
+		Mono<Object> mono = this.resolver.resolveArgument(this.paramNamedString, bindingContext, this.exchange);
 		Object result = mono.block();
 		assertEquals("value", result);
 	}
@@ -109,7 +110,8 @@ public class PathVariableMethodArgumentResolverTests {
 		uriTemplateVars.put("name", "value");
 		this.exchange.getAttributes().put(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE, uriTemplateVars);
 
-		Mono<Object> mono = this.resolver.resolveArgument(this.paramNotRequired, new ModelMap(), this.exchange);
+		BindingContext bindingContext = new BindingContext();
+		Mono<Object> mono = this.resolver.resolveArgument(this.paramNotRequired, bindingContext, this.exchange);
 		Object result = mono.block();
 		assertEquals("value", result);
 	}
@@ -120,14 +122,16 @@ public class PathVariableMethodArgumentResolverTests {
 		uriTemplateVars.put("name", "value");
 		this.exchange.getAttributes().put(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE, uriTemplateVars);
 
-		Mono<Object> mono = this.resolver.resolveArgument(this.paramOptional, new ModelMap(), this.exchange);
+		BindingContext bindingContext = new BindingContext();
+		Mono<Object> mono = this.resolver.resolveArgument(this.paramOptional, bindingContext, this.exchange);
 		Object result = mono.block();
 		assertEquals(Optional.of("value"), result);
 	}
 
 	@Test
 	public void handleMissingValue() throws Exception {
-		Mono<Object> mono = this.resolver.resolveArgument(this.paramNamedString, new ModelMap(), this.exchange);
+		BindingContext bindingContext = new BindingContext();
+		Mono<Object> mono = this.resolver.resolveArgument(this.paramNamedString, bindingContext, this.exchange);
 		TestSubscriber
 				.subscribe(mono)
 				.assertError(ServerErrorException.class);
@@ -135,7 +139,8 @@ public class PathVariableMethodArgumentResolverTests {
 
 	@Test
 	public void nullIfNotRequired() throws Exception {
-		Mono<Object> mono = this.resolver.resolveArgument(this.paramNotRequired, new ModelMap(), this.exchange);
+		BindingContext bindingContext = new BindingContext();
+		Mono<Object> mono = this.resolver.resolveArgument(this.paramNotRequired, bindingContext, this.exchange);
 		TestSubscriber
 				.subscribe(mono)
 				.assertComplete()
@@ -144,7 +149,8 @@ public class PathVariableMethodArgumentResolverTests {
 
 	@Test
 	public void wrapEmptyWithOptional() throws Exception {
-		Mono<Object> mono = this.resolver.resolveArgument(this.paramOptional, new ModelMap(), this.exchange);
+		BindingContext bindingContext = new BindingContext();
+		Mono<Object> mono = this.resolver.resolveArgument(this.paramOptional, bindingContext, this.exchange);
 		Object result = mono.block();
 		TestSubscriber
 				.subscribe(mono)

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/annotation/RequestAttributeMethodArgumentResolverTests.java

@@ -36,6 +36,7 @@ import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.tests.TestSubscriber;
 import org.springframework.util.ReflectionUtils;
 import org.springframework.web.bind.annotation.RequestAttribute;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.ServerWebInputException;
 import org.springframework.web.server.adapter.DefaultServerWebExchange;
@@ -88,14 +89,14 @@ public class RequestAttributeMethodArgumentResolverTests {
 	@Test
 	public void resolve() throws Exception {
 		MethodParameter param = initMethodParameter(0);
-		Mono<Object> mono = this.resolver.resolveArgument(param, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		TestSubscriber
 				.subscribe(mono)
 				.assertError(ServerWebInputException.class);
 
 		Foo foo = new Foo();
 		this.exchange.getAttributes().put("foo", foo);
-		mono = this.resolver.resolveArgument(param, null, this.exchange);
+		mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		assertSame(foo, mono.block());
 	}
 
@@ -104,33 +105,34 @@ public class RequestAttributeMethodArgumentResolverTests {
 		MethodParameter param = initMethodParameter(1);
 		Foo foo = new Foo();
 		this.exchange.getAttributes().put("specialFoo", foo);
-		Mono<Object> mono = this.resolver.resolveArgument(param, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		assertSame(foo, mono.block());
 	}
 
 	@Test
 	public void resolveNotRequired() throws Exception {
 		MethodParameter param = initMethodParameter(2);
-		Mono<Object> mono = this.resolver.resolveArgument(param, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		assertNull(mono.block());
 
 		Foo foo = new Foo();
 		this.exchange.getAttributes().put("foo", foo);
-		mono = this.resolver.resolveArgument(param, null, this.exchange);
+		mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		assertSame(foo, mono.block());
 	}
 
 	@Test
 	public void resolveOptional() throws Exception {
 		MethodParameter param = initMethodParameter(3);
-		Mono<Object> mono = this.resolver.resolveArgument(param, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
+
 		assertNotNull(mono.block());
 		assertEquals(Optional.class, mono.block().getClass());
 		assertFalse(((Optional) mono.block()).isPresent());
 
 		Foo foo = new Foo();
 		this.exchange.getAttributes().put("foo", foo);
-		mono = this.resolver.resolveArgument(param, null, this.exchange);
+		mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 
 		assertNotNull(mono.block());
 		assertEquals(Optional.class, mono.block().getClass());

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/annotation/RequestBodyArgumentResolverTests.java

@@ -39,10 +39,10 @@ import org.springframework.http.codec.HttpMessageReader;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpRequest;
 import org.springframework.mock.http.server.reactive.test.MockServerHttpResponse;
 import org.springframework.tests.TestSubscriber;
-import org.springframework.ui.ExtendedModelMap;
 import org.springframework.validation.Validator;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.reactive.result.ResolvableMethod;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.ServerWebInputException;
 import org.springframework.web.server.adapter.DefaultServerWebExchange;
@@ -213,7 +213,7 @@ public class RequestBodyArgumentResolverTests {
 	@SuppressWarnings("unchecked")
 	private <T> T resolveValueWithEmptyBody(ResolvableType bodyType, boolean isRequired) {
 		MethodParameter param = this.testMethod.resolveParam(bodyType, requestBody(isRequired));
-		Mono<Object> result = this.resolver.resolveArgument(param, new ExtendedModelMap(), this.exchange);
+		Mono<Object> result = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		Object value = result.block(Duration.ofSeconds(5));
 
 		if (value != null) {

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/annotation/RequestHeaderMethodArgumentResolverTests.java

@@ -39,6 +39,7 @@ import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.tests.TestSubscriber;
 import org.springframework.util.ReflectionUtils;
 import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.ServerWebInputException;
 import org.springframework.web.server.adapter.DefaultServerWebExchange;
@@ -70,6 +71,8 @@ public class RequestHeaderMethodArgumentResolverTests {
 
 	private ServerWebExchange exchange;
 
+	private BindingContext bindingContext = new BindingContext();
+
 
 	@Before
 	public void setUp() throws Exception {
@@ -107,7 +110,9 @@ public class RequestHeaderMethodArgumentResolverTests {
 		String expected = "foo";
 		this.exchange.getRequest().getHeaders().add("name", expected);
 
-		Mono<Object> mono = this.resolver.resolveArgument(paramNamedDefaultValueStringHeader, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.paramNamedDefaultValueStringHeader, this.bindingContext, this.exchange);
+
 		Object result = mono.block();
 		assertTrue(result instanceof String);
 		assertEquals(expected, result);
@@ -118,7 +123,9 @@ public class RequestHeaderMethodArgumentResolverTests {
 		String[] expected = new String[] {"foo", "bar"};
 		this.exchange.getRequest().getHeaders().put("name", Arrays.asList(expected));
 
-		Mono<Object> mono = this.resolver.resolveArgument(paramNamedValueStringArray, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.paramNamedValueStringArray, this.bindingContext, this.exchange);
+
 		Object result = mono.block();
 		assertTrue(result instanceof String[]);
 		assertArrayEquals(expected, (String[]) result);
@@ -126,7 +133,9 @@ public class RequestHeaderMethodArgumentResolverTests {
 
 	@Test
 	public void resolveDefaultValue() throws Exception {
-		Mono<Object> mono = this.resolver.resolveArgument(paramNamedDefaultValueStringHeader, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.paramNamedDefaultValueStringHeader, this.bindingContext, this.exchange);
+
 		Object result = mono.block();
 		assertTrue(result instanceof String);
 		assertEquals("bar", result);
@@ -136,7 +145,9 @@ public class RequestHeaderMethodArgumentResolverTests {
 	public void resolveDefaultValueFromSystemProperty() throws Exception {
 		System.setProperty("systemProperty", "bar");
 		try {
-			Mono<Object> mono = this.resolver.resolveArgument(paramSystemProperty, null, this.exchange);
+			Mono<Object> mono = this.resolver.resolveArgument(
+					this.paramSystemProperty, this.bindingContext, this.exchange);
+
 			Object result = mono.block();
 			assertTrue(result instanceof String);
 			assertEquals("bar", result);
@@ -153,7 +164,9 @@ public class RequestHeaderMethodArgumentResolverTests {
 
 		System.setProperty("systemProperty", "bar");
 		try {
-			Mono<Object> mono = this.resolver.resolveArgument(paramResolvedNameWithExpression, null, this.exchange);
+			Mono<Object> mono = this.resolver.resolveArgument(
+					this.paramResolvedNameWithExpression, this.bindingContext, this.exchange);
+
 			Object result = mono.block();
 			assertTrue(result instanceof String);
 			assertEquals(expected, result);
@@ -170,7 +183,9 @@ public class RequestHeaderMethodArgumentResolverTests {
 
 		System.setProperty("systemProperty", "bar");
 		try {
-			Mono<Object> mono = this.resolver.resolveArgument(paramResolvedNameWithPlaceholder, null, this.exchange);
+			Mono<Object> mono = this.resolver.resolveArgument(
+					this.paramResolvedNameWithPlaceholder, this.bindingContext, this.exchange);
+
 			Object result = mono.block();
 			assertTrue(result instanceof String);
 			assertEquals(expected, result);
@@ -182,7 +197,9 @@ public class RequestHeaderMethodArgumentResolverTests {
 
 	@Test
 	public void notFound() throws Exception {
-		Mono<Object> mono = resolver.resolveArgument(paramNamedValueStringArray, null, this.exchange);
+		Mono<Object> mono = resolver.resolveArgument(
+				this.paramNamedValueStringArray, this.bindingContext, this.exchange);
+
 		TestSubscriber
 				.subscribe(mono)
 				.assertError(ServerWebInputException.class);
@@ -194,7 +211,7 @@ public class RequestHeaderMethodArgumentResolverTests {
 		String rfc1123val = "Thu, 21 Apr 2016 17:11:08 +0100";
 		this.exchange.getRequest().getHeaders().add("name", rfc1123val);
 
-		Mono<Object> mono = this.resolver.resolveArgument(paramDate, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(this.paramDate, this.bindingContext, this.exchange);
 		Object result = mono.block();
 
 		assertTrue(result instanceof Date);
@@ -206,7 +223,7 @@ public class RequestHeaderMethodArgumentResolverTests {
 		String rfc1123val = "Thu, 21 Apr 2016 17:11:08 +0100";
 		this.exchange.getRequest().getHeaders().add("name", rfc1123val);
 
-		Mono<Object> mono = this.resolver.resolveArgument(paramInstant, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(this.paramInstant, this.bindingContext, this.exchange);
 		Object result = mono.block();
 
 		assertTrue(result instanceof Instant);

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/annotation/RequestParamMethodArgumentResolverTests.java

@@ -39,6 +39,7 @@ import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.tests.TestSubscriber;
 import org.springframework.util.ReflectionUtils;
 import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.ServerWebInputException;
 import org.springframework.web.server.adapter.DefaultServerWebExchange;
@@ -71,6 +72,8 @@ public class RequestParamMethodArgumentResolverTests {
 	private MethodParameter paramNotRequired;
 	private MethodParameter paramOptional;
 
+	private BindingContext bindingContext = new BindingContext();
+
 
 	@Before @SuppressWarnings("ConfusingArgumentToVarargsMethod")
 	public void setUp() throws Exception {
@@ -117,9 +120,10 @@ public class RequestParamMethodArgumentResolverTests {
 		String expected = "foo";
 		this.exchange.getRequest().getQueryParams().set("name", expected);
 
-		Mono<Object> mono = this.resolver.resolveArgument(this.paramNamedDefaultValueString, null, this.exchange);
-		Object result = mono.block();
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.paramNamedDefaultValueString, this.bindingContext, this.exchange);
 
+		Object result = mono.block();
 		assertTrue(result instanceof String);
 		assertEquals("Invalid result", expected, result);
 	}
@@ -129,25 +133,29 @@ public class RequestParamMethodArgumentResolverTests {
 		String[] expected = {"foo", "bar"};
 		this.exchange.getRequest().getQueryParams().put("name", Arrays.asList(expected));
 
-		Mono<Object> mono = this.resolver.resolveArgument(this.paramNamedStringArray, null, this.exchange);
-		Object result = mono.block();
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.paramNamedStringArray, this.bindingContext, this.exchange);
 
+		Object result = mono.block();
 		assertTrue(result instanceof String[]);
 		assertArrayEquals(expected, (String[]) result);
 	}
 
 	@Test
 	public void resolveDefaultValue() throws Exception {
-		Mono<Object> mono = this.resolver.resolveArgument(paramNamedDefaultValueString, null, this.exchange);
-		Object result = mono.block();
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.paramNamedDefaultValueString, this.bindingContext, this.exchange);
 
+		Object result = mono.block();
 		assertTrue(result instanceof String);
 		assertEquals("Invalid result", "bar", result);
 	}
 
 	@Test
 	public void missingRequestParam() throws Exception {
-		Mono<Object> mono = this.resolver.resolveArgument(paramNamedStringArray, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.paramNamedStringArray, this.bindingContext, this.exchange);
+
 		TestSubscriber
 				.subscribe(mono)
 				.assertError(ServerWebInputException.class);
@@ -156,57 +164,63 @@ public class RequestParamMethodArgumentResolverTests {
 	@Test
 	public void resolveSimpleTypeParam() throws Exception {
 		this.exchange.getRequest().getQueryParams().set("stringNotAnnot", "plainValue");
-		Mono<Object> mono = this.resolver.resolveArgument(paramStringNotAnnot, null, this.exchange);
-		Object result = mono.block();
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.paramStringNotAnnot, this.bindingContext, this.exchange);
 
+		Object result = mono.block();
 		assertTrue(result instanceof String);
 		assertEquals("plainValue", result);
 	}
 
 	@Test  // SPR-8561
 	public void resolveSimpleTypeParamToNull() throws Exception {
-		Mono<Object> mono = this.resolver.resolveArgument(paramStringNotAnnot, null, this.exchange);
-		Object result = mono.block();
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.paramStringNotAnnot, this.bindingContext, this.exchange);
 
+		Object result = mono.block();
 		assertNull(result);
 	}
 
 	@Test  // SPR-10180
 	public void resolveEmptyValueToDefault() throws Exception {
 		this.exchange.getRequest().getQueryParams().set("name", "");
-		Mono<Object> mono = this.resolver.resolveArgument(paramNamedDefaultValueString, null, this.exchange);
-		Object result = mono.block();
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.paramNamedDefaultValueString, this.bindingContext, this.exchange);
 
+		Object result = mono.block();
 		assertEquals("bar", result);
 	}
 
 	@Test
 	public void resolveEmptyValueWithoutDefault() throws Exception {
 		this.exchange.getRequest().getQueryParams().set("stringNotAnnot", "");
-		Mono<Object> mono = this.resolver.resolveArgument(paramStringNotAnnot, null, this.exchange);
-		Object result = mono.block();
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.paramStringNotAnnot, this.bindingContext, this.exchange);
 
+		Object result = mono.block();
 		assertEquals("", result);
 	}
 
 	@Test
 	public void resolveEmptyValueRequiredWithoutDefault() throws Exception {
 		this.exchange.getRequest().getQueryParams().set("name", "");
-		Mono<Object> mono = this.resolver.resolveArgument(paramRequired, null, this.exchange);
-		Object result = mono.block();
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.paramRequired, this.bindingContext, this.exchange);
 
+		Object result = mono.block();
 		assertEquals("", result);
 	}
 
 	@Test
 	public void resolveOptionalParamValue() throws Exception {
-		Mono<Object> mono = this.resolver.resolveArgument(paramOptional, null, this.exchange);
-		Object result = mono.block();
+		Mono<Object> mono = this.resolver.resolveArgument(
+				this.paramOptional, this.bindingContext, this.exchange);
 
+		Object result = mono.block();
 		assertEquals(Optional.empty(), result);
 
 		this.exchange.getRequest().getQueryParams().set("name", "123");
-		mono = resolver.resolveArgument(paramOptional, null, this.exchange);
+		mono = this.resolver.resolveArgument(this.paramOptional, this.bindingContext, this.exchange);
 		result = mono.block();
 
 		assertEquals(Optional.class, result.getClass());

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/annotation/ServerWebExchangeArgumentResolverTests.java

@@ -21,12 +21,12 @@ import reactor.core.publisher.Mono;
 
 import org.springframework.core.MethodParameter;
 import org.springframework.http.HttpMethod;
-import org.springframework.mock.http.server.reactive.test.MockServerHttpRequest;
-import org.springframework.mock.http.server.reactive.test.MockServerHttpResponse;
 import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.http.server.reactive.ServerHttpResponse;
-import org.springframework.ui.ModelMap;
+import org.springframework.mock.http.server.reactive.test.MockServerHttpRequest;
+import org.springframework.mock.http.server.reactive.test.MockServerHttpResponse;
 import org.springframework.web.reactive.result.ResolvableMethod;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.WebSession;
 import org.springframework.web.server.adapter.DefaultServerWebExchange;
@@ -84,7 +84,7 @@ public class ServerWebExchangeArgumentResolverTests {
 	}
 
 	private void testResolveArgument(MethodParameter parameter, Object expected) {
-		Mono<Object> mono = this.resolver.resolveArgument(parameter, new ModelMap(), this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(parameter, new BindingContext(), this.exchange);
 		assertSame(expected, mono.block());
 	}
 

spring-web-reactive/src/test/java/org/springframework/web/reactive/result/method/annotation/SessionAttributeMethodArgumentResolverTests.java

@@ -36,6 +36,7 @@ import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.tests.TestSubscriber;
 import org.springframework.util.ReflectionUtils;
 import org.springframework.web.bind.annotation.SessionAttribute;
+import org.springframework.web.reactive.result.method.BindingContext;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.ServerWebInputException;
 import org.springframework.web.server.WebSession;
@@ -95,14 +96,14 @@ public class SessionAttributeMethodArgumentResolverTests {
 	@Test
 	public void resolve() throws Exception {
 		MethodParameter param = initMethodParameter(0);
-		Mono<Object> mono = this.resolver.resolveArgument(param, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		TestSubscriber
 				.subscribe(mono)
 				.assertError(ServerWebInputException.class);
 
 		Foo foo = new Foo();
 		when(this.session.getAttribute("foo")).thenReturn(Optional.of(foo));
-		mono = this.resolver.resolveArgument(param, null, this.exchange);
+		mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		assertSame(foo, mono.block());
 	}
 
@@ -111,33 +112,33 @@ public class SessionAttributeMethodArgumentResolverTests {
 		MethodParameter param = initMethodParameter(1);
 		Foo foo = new Foo();
 		when(this.session.getAttribute("specialFoo")).thenReturn(Optional.of(foo));
-		Mono<Object> mono = this.resolver.resolveArgument(param, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		assertSame(foo, mono.block());
 	}
 
 	@Test
 	public void resolveNotRequired() throws Exception {
 		MethodParameter param = initMethodParameter(2);
-		Mono<Object> mono = this.resolver.resolveArgument(param, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		assertNull(mono.block());
 
 		Foo foo = new Foo();
 		when(this.session.getAttribute("foo")).thenReturn(Optional.of(foo));
-		mono = this.resolver.resolveArgument(param, null, this.exchange);
+		mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		assertSame(foo, mono.block());
 	}
 
 	@Test
 	public void resolveOptional() throws Exception {
 		MethodParameter param = initMethodParameter(3);
-		Mono<Object> mono = this.resolver.resolveArgument(param, null, this.exchange);
+		Mono<Object> mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 		assertNotNull(mono.block());
 		assertEquals(Optional.class, mono.block().getClass());
 		assertFalse(((Optional) mono.block()).isPresent());
 
 		Foo foo = new Foo();
 		when(this.session.getAttribute("foo")).thenReturn(Optional.of(foo));
-		mono = this.resolver.resolveArgument(param, null, this.exchange);
+		mono = this.resolver.resolveArgument(param, new BindingContext(), this.exchange);
 
 		assertNotNull(mono.block());
 		assertEquals(Optional.class, mono.block().getClass());