Add accessor methods to HttpPutFormContentFilter

Issue: SPR-14503

spring-web/src/main/java/org/springframework/web/filter/HttpPutFormContentFilter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -39,6 +39,7 @@ import org.springframework.http.MediaType;
 import org.springframework.http.converter.FormHttpMessageConverter;
 import org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter;
 import org.springframework.http.server.ServletServerHttpRequest;
+import org.springframework.util.Assert;
 import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.MultiValueMap;
 
@@ -59,11 +60,26 @@ import org.springframework.util.MultiValueMap;
  */
 public class HttpPutFormContentFilter extends OncePerRequestFilter {
 
-	private final FormHttpMessageConverter formConverter = new AllEncompassingFormHttpMessageConverter();
+	private FormHttpMessageConverter formConverter = new AllEncompassingFormHttpMessageConverter();
 
 
+	/**
+	 * Set the converter to use for parsing form content.
+	 * <p>By default this is an instnace of {@link AllEncompassingFormHttpMessageConverter}.
+	 */
+	public void setFormConverter(FormHttpMessageConverter converter) {
+		Assert.notNull(converter, "FormHttpMessageConverter is required.");
+		this.formConverter = converter;
+	}
+
+	public FormHttpMessageConverter getFormConverter() {
+		return this.formConverter;
+	}
+
 	/**
 	 * The default character set to use for reading form data.
+	 * This is a shortcut for:<br>
+	 * {@code getFormConverter.setCharset(charset)}.
 	 */
 	public void setCharset(Charset charset) {
 		this.formConverter.setCharset(charset);