SPR-8217 adding one class missed on last checkin

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/mvc/method/annotation/support/ServletWebArgumentResolverAdapter.java

+/*
+ * Copyright 2002-2011 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.servlet.mvc.method.annotation.support;
+
+import org.springframework.web.bind.support.WebArgumentResolver;
+import org.springframework.web.context.request.NativeWebRequest;
+import org.springframework.web.context.request.RequestAttributes;
+import org.springframework.web.context.request.RequestContextHolder;
+import org.springframework.web.context.request.ServletRequestAttributes;
+import org.springframework.web.context.request.ServletWebRequest;
+import org.springframework.web.method.annotation.support.WebArgumentResolverAdapter;
+
+/**
+ * A Servlet-specific {@link WebArgumentResolverAdapter} that provides access to a {@link NativeWebRequest}.
+ * 
+ * @author Rossen Stoyanchev
+ * @since 3.1
+ */
+public class ServletWebArgumentResolverAdapter extends WebArgumentResolverAdapter {
+
+	public ServletWebArgumentResolverAdapter(WebArgumentResolver adaptee) {
+		super(adaptee);
+	}
+
+	@Override
+	protected NativeWebRequest getWebRequest() {
+		RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
+		if (requestAttributes instanceof ServletRequestAttributes) {
+			ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) requestAttributes;
+			return new ServletWebRequest(servletRequestAttributes.getRequest());
+		}
+		return null;
+	}
+
+}