Polishing

spring-core/src/main/java/org/springframework/core/ConfigurableObjectInputStream.java

@@ -21,7 +21,6 @@ import java.io.InputStream;
 import java.io.NotSerializableException;
 import java.io.ObjectInputStream;
 import java.io.ObjectStreamClass;
-import java.lang.reflect.Proxy;
 
 import org.springframework.util.ClassUtils;
 
@@ -139,8 +138,9 @@ public class ConfigurableObjectInputStream extends ObjectInputStream {
 
 	/**
 	 * Return the fallback ClassLoader to use when no ClassLoader was specified
-	 * and ObjectInputStream's own default ClassLoader failed.
-	 * <p>The default implementation simply returns {@code null}.
+	 * and ObjectInputStream's own default class loader failed.
+	 * <p>The default implementation simply returns {@code null}, indicating
+	 * that no specific fallback is available.
 	 */
 	protected ClassLoader getFallbackClassLoader() throws IOException {
 		return null;

spring-core/src/main/java/org/springframework/core/io/Resource.java

@@ -37,20 +37,20 @@ import java.net.URL;
  * @see #getFile()
  * @see WritableResource
  * @see ContextResource
- * @see FileSystemResource
- * @see ClassPathResource
  * @see UrlResource
+ * @see ClassPathResource
+ * @see FileSystemResource
+ * @see PathResource
  * @see ByteArrayResource
  * @see InputStreamResource
- * @see PathResource
  */
 public interface Resource extends InputStreamSource {
 
 	/**
 	 * Determine whether this resource actually exists in physical form.
 	 * <p>This method performs a definitive existence check, whereas the
-	 * existence of a {@code Resource} handle only guarantees a
-	 * valid descriptor handle.
+	 * existence of a {@code Resource} handle only guarantees a valid
+	 * descriptor handle.
 	 */
 	boolean exists();
 

spring-core/src/main/java/org/springframework/util/ClassUtils.java

@@ -1159,7 +1159,6 @@ public abstract class ClassUtils {
 	@SuppressWarnings("deprecation")
 	public static Class<?> createCompositeInterface(Class<?>[] interfaces, ClassLoader classLoader) {
 		Assert.notEmpty(interfaces, "Interfaces must not be empty");
-		Assert.notNull(classLoader, "ClassLoader must not be null");
 		return Proxy.getProxyClass(classLoader, interfaces);
 	}
 

spring-web/src/main/java/org/springframework/http/HttpStatus.java

@@ -326,7 +326,8 @@ public enum HttpStatus {
 	/**
 	 * {@code 451 Unavailable For Legal Reasons}.
 	 * @see <a href="https://tools.ietf.org/html/draft-ietf-httpbis-legally-restricted-status-04">
-	 *     An HTTP Status Code to Report Legal Obstacles</a>
+	 * An HTTP Status Code to Report Legal Obstacles</a>
+	 * @since 4.3
 	 */
 	UNAVAILABLE_FOR_LEGAL_REASONS(451, "Unavailable For Legal Reasons"),
 

spring-webmvc/src/main/java/org/springframework/web/servlet/view/xslt/XsltView.java

@@ -99,7 +99,6 @@ public class XsltView extends AbstractUrlBasedView {
 	 * to build the TransformerFactory for this view.
 	 */
 	public void setTransformerFactoryClass(Class<? extends TransformerFactory> transformerFactoryClass) {
-		Assert.isAssignable(TransformerFactory.class, transformerFactoryClass);
 		this.transformerFactoryClass = transformerFactoryClass;
 	}