Polishing

spring-web/src/main/java/org/springframework/http/converter/AbstractHttpMessageConverter.java

@@ -200,7 +200,7 @@ public abstract class AbstractHttpMessageConverter<T> implements HttpMessageConv
 	/**
 	 * Add default headers to the output message.
 	 * <p>This implementation delegates to {@link #getDefaultContentType(Object)} if a content
-	 * type was not provided, calls {@link #getContentLength}, and sets the corresponding headers
+	 * type was not provided, calls {@link #getContentLength}, and sets the corresponding headers.
 	 * @since 4.2
 	 */
 	protected void addDefaultHeaders(HttpHeaders headers, T t, MediaType contentType) throws IOException{

spring-web/src/main/java/org/springframework/http/converter/ByteArrayHttpMessageConverter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * 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.
@@ -32,15 +32,19 @@ import org.springframework.util.StreamUtils;
  * overridden by setting the {@link #setSupportedMediaTypes supportedMediaTypes} property.
  *
  * @author Arjen Poutsma
+ * @author Juergen Hoeller
  * @since 3.0
  */
 public class ByteArrayHttpMessageConverter extends AbstractHttpMessageConverter<byte[]> {
 
-	/** Creates a new instance of the {@code ByteArrayHttpMessageConverter}. */
+	/**
+	 * Create a new instance of the {@code ByteArrayHttpMessageConverter}.
+	 */
 	public ByteArrayHttpMessageConverter() {
 		super(new MediaType("application", "octet-stream"), MediaType.ALL);
 	}
 
+
 	@Override
 	public boolean supports(Class<?> clazz) {
 		return byte[].class == clazz;

spring-web/src/main/java/org/springframework/http/converter/FormHttpMessageConverter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * 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.
@@ -255,7 +255,7 @@ public class FormHttpMessageConverter implements HttpMessageConverter<MultiValue
 		Charset charset;
 		if (contentType != null) {
 			outputMessage.getHeaders().setContentType(contentType);
-			charset = contentType.getCharSet() != null ? contentType.getCharSet() : this.charset;
+			charset = (contentType.getCharSet() != null ? contentType.getCharSet() : this.charset);
 		}
 		else {
 			outputMessage.getHeaders().setContentType(MediaType.APPLICATION_FORM_URLENCODED);

spring-web/src/main/java/org/springframework/http/converter/ObjectToStringHttpMessageConverter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * 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.
@@ -29,11 +29,12 @@ import org.springframework.util.Assert;
  * An {@code HttpMessageConverter} that uses {@link StringHttpMessageConverter}
  * for reading and writing content and a {@link ConversionService} for converting
  * the String content to and from the target object type.
- * <p>
- * By default, this converter supports the media type {@code text/plain} only.
- * This can be overridden by setting the
- * {@link #setSupportedMediaTypes supportedMediaTypes} property.
- * Example of usage:
+ *
+ * <p>By default, this converter supports the media type {@code text/plain} only.
+ * This can be overridden through the {@link #setSupportedMediaTypes supportedMediaTypes}
+ * property.
+ *
+ * <p>A usage example:
  *
  * <pre class="code">
  * &lt;bean class="org.springframework.http.converter.ObjectToStringHttpMessageConverter">
@@ -49,17 +50,15 @@ import org.springframework.util.Assert;
  */
 public class ObjectToStringHttpMessageConverter extends AbstractHttpMessageConverter<Object> {
 
-	private ConversionService conversionService;
+	private final ConversionService conversionService;
 
-	private StringHttpMessageConverter stringHttpMessageConverter;
+	private final StringHttpMessageConverter stringHttpMessageConverter;
 
 
 	/**
 	 * A constructor accepting a {@code ConversionService} to use to convert the
-	 * (String) message body to/from the target class type. This constructor
-	 * uses {@link StringHttpMessageConverter#DEFAULT_CHARSET} as the default
-	 * charset.
-	 *
+	 * (String) message body to/from the target class type. This constructor uses
+	 * {@link StringHttpMessageConverter#DEFAULT_CHARSET} as the default charset.
 	 * @param conversionService the conversion service
 	 */
 	public ObjectToStringHttpMessageConverter(ConversionService conversionService) {
@@ -67,20 +66,19 @@ public class ObjectToStringHttpMessageConverter extends AbstractHttpMessageConve
 	}
 
 	/**
-	 * A constructor accepting a {@code ConversionService} as well as a default
-	 * charset.
-	 *
+	 * A constructor accepting a {@code ConversionService} as well as a default charset.
 	 * @param conversionService the conversion service
 	 * @param defaultCharset the default charset
 	 */
 	public ObjectToStringHttpMessageConverter(ConversionService conversionService, Charset defaultCharset) {
 		super(new MediaType("text", "plain", defaultCharset));
 
-		Assert.notNull(conversionService, "conversionService is required");
+		Assert.notNull(conversionService, "ConversionService is required");
 		this.conversionService = conversionService;
 		this.stringHttpMessageConverter = new StringHttpMessageConverter(defaultCharset);
 	}
 
+
 	/**
 	 * Indicates whether the {@code Accept-Charset} should be written to any outgoing request.
 	 * <p>Default is {@code true}.
@@ -89,6 +87,7 @@ public class ObjectToStringHttpMessageConverter extends AbstractHttpMessageConve
 		this.stringHttpMessageConverter.setWriteAcceptCharset(writeAcceptCharset);
 	}
 
+
 	@Override
 	public boolean canRead(Class<?> clazz, MediaType mediaType) {
 		return this.conversionService.canConvert(String.class, clazz) && canRead(mediaType);
@@ -106,15 +105,15 @@ public class ObjectToStringHttpMessageConverter extends AbstractHttpMessageConve
 	}
 
 	@Override
-	protected Object readInternal(Class<? extends Object> clazz, HttpInputMessage inputMessage) throws IOException {
+	protected Object readInternal(Class<?> clazz, HttpInputMessage inputMessage) throws IOException {
 		String value = this.stringHttpMessageConverter.readInternal(String.class, inputMessage);
 		return this.conversionService.convert(value, clazz);
 	}
 
 	@Override
 	protected void writeInternal(Object obj, HttpOutputMessage outputMessage) throws IOException {
-		String s = this.conversionService.convert(obj, String.class);
-		this.stringHttpMessageConverter.writeInternal(s, outputMessage);
+		String value = this.conversionService.convert(obj, String.class);
+		this.stringHttpMessageConverter.writeInternal(value, outputMessage);
 	}
 
 	@Override