Fix checkstyle issue

spring-webflux/src/main/java/org/springframework/web/reactive/function/server/package-info.java

-/*
- * Copyright 2002-2019 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.
- */
-
 /**
  * Provides the types that make up Spring's functional web framework for Reactive environments.
  */

spring-webmvc/src/main/java/org/springframework/web/servlet/function/DefaultEntityResponseBuilder.java

@@ -62,8 +62,9 @@ import org.springframework.web.servlet.ModelAndView;
  *
  * @author Arjen Poutsma
  * @since 5.2
+ * @param <T> the entity type
  */
-class DefaultEntityResponseBuilder<T> implements EntityResponse.Builder<T> {
+final class DefaultEntityResponseBuilder<T> implements EntityResponse.Builder<T> {
 
 	private final T entity;
 

spring-webmvc/src/main/java/org/springframework/web/servlet/function/DefaultServerRequest.java

@@ -220,7 +220,8 @@ class DefaultServerRequest implements ServerRequest {
 				.getAttribute(RouterFunctions.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
 		if (pathVariables != null) {
 			return pathVariables;
-		} else {
+		}
+		else {
 			return Collections.emptyMap();
 		}
 	}
@@ -235,7 +236,9 @@ class DefaultServerRequest implements ServerRequest {
 		return Optional.ofNullable(this.serverHttpRequest.getPrincipal());
 	}
 
-
+	/**
+	 * Default implementation of {@link Headers}.
+	 */
 	static class DefaultRequestHeaders implements Headers {
 
 		private final HttpHeaders delegate;
@@ -298,7 +301,7 @@ class DefaultServerRequest implements ServerRequest {
 		}
 	}
 
-	private static class ServletParametersMap extends AbstractMap<String, List<String>> {
+	private static final class ServletParametersMap extends AbstractMap<String, List<String>> {
 
 		private final HttpServletRequest servletRequest;
 
@@ -353,7 +356,7 @@ class DefaultServerRequest implements ServerRequest {
 	}
 
 
-	private static class ServletAttributesMap extends AbstractMap<String, Object> {
+	private static final class ServletAttributesMap extends AbstractMap<String, Object> {
 
 		private final HttpServletRequest servletRequest;
 

spring-webmvc/src/main/java/org/springframework/web/servlet/function/DefaultServerRequestBuilder.java

@@ -283,7 +283,8 @@ class DefaultServerRequestBuilder implements ServerRequest.Builder {
 					.get(RouterFunctions.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
 			if (pathVariables != null) {
 				return pathVariables;
-			} else {
+			}
+			else {
 				return Collections.emptyMap();
 			}
 		}

spring-webmvc/src/main/java/org/springframework/web/servlet/function/DefaultServerResponseBuilder.java

@@ -286,8 +286,9 @@ class DefaultServerResponseBuilder implements ServerResponse.BodyBuilder {
 				else {
 					return writeToInternal(request, response, context);
 				}
-			} catch (Throwable t) {
-				return handleError(t, request, response, context);
+			}
+			catch (Throwable throwable) {
+				return handleError(throwable, request, response, context);
 			}
 		}
 

spring-webmvc/src/main/java/org/springframework/web/servlet/function/EntityResponse.java

@@ -72,6 +72,7 @@ public interface EntityResponse<T> extends ServerResponse {
 
 	/**
 	 * Defines a builder for {@code EntityResponse}.
+	 * @param <T> the entity type
 	 */
 	interface Builder<T> {
 

spring-webmvc/src/main/java/org/springframework/web/servlet/function/RouterFunctions.java

@@ -830,10 +830,11 @@ public abstract class RouterFunctions {
 													"Nested predicate \"%s\" matches against \"%s\"",
 													this.predicate, serverRequest));
 								}
-								Optional<HandlerFunction<T>> result = this.routerFunction.route(nestedRequest);
+								Optional<HandlerFunction<T>> result =
+										this.routerFunction.route(nestedRequest);
 								if (result.isPresent() && nestedRequest != serverRequest) {
-									 serverRequest.attributes().clear();
-									 serverRequest.attributes().putAll(nestedRequest.attributes());
+									serverRequest.attributes().clear();
+									serverRequest.attributes().putAll(nestedRequest.attributes());
 								}
 								return result;
 							}

spring-webmvc/src/main/java/org/springframework/web/servlet/function/ServerRequest.java

@@ -223,7 +223,7 @@ public interface ServerRequest {
 	// Static methods
 
 	/**
-	 * Create a new {@code ServerRequest} based on the given {@code {@link HttpServletRequest} and
+	 * Create a new {@code ServerRequest} based on the given {@code HttpServletRequest} and
 	 * message converters.
 	 * @param servletRequest the request
 	 * @param messageReaders the message readers

spring-webmvc/src/main/java/org/springframework/web/servlet/function/ServerResponse.java

@@ -71,7 +71,8 @@ public interface ServerResponse {
 	MultiValueMap<String, Cookie> cookies();
 
 	/**
-	 * Write this response to the servlet response (and return {@code null}, or return a
+	 * Write this response to the servlet response (and return {@code null}, or return a model and
+	 * view.
 	 * @param request the current request
 	 * @param response the response to write to
 	 * @param context the context to use when writing

spring-webmvc/src/main/java/org/springframework/web/servlet/function/support/package-info.java

-/*
- * Copyright 2002-2019 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.
- */
-
 /**
  * Classes supporting the {@code org.springframework.web.servlet.function} package.
  * Contains a {@code HandlerAdapter} that supports {@code HandlerFunction}s,