SPR-7081 - Add ignoreJafMediaTypes to ContentNegotiatingViewResolver

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/view/ContentNegotiatingViewResolver.java

@@ -72,7 +72,8 @@ import org.springframework.web.util.WebUtils;
  * media type. The default name of the parameter is <code>format</code> and it can be configured using the
  * {@link #setParameterName(String) parameterName} property.</li>
  * <li>If there is no match in the {@link #setMediaTypes(Map) mediaTypes} property and if the Java Activation
- * Framework (JAF) is present on the class path, {@link FileTypeMap#getContentType(String)} is used instead.</li>
+ * Framework (JAF) is both {@linkplain #setUseJaf(boolean) enabled} and present on the class path,
+ * {@link FileTypeMap#getContentType(String)} is used instead.</li>
  * <li>If the previous steps did not result in a media type, and
  * {@link #setIgnoreAcceptHeader(boolean) ignoreAcceptHeader} is {@code false}, the request {@code Accept} header is
  * used.</li>
@@ -123,6 +124,8 @@ public class ContentNegotiatingViewResolver extends WebApplicationObjectSupport
 
 	private boolean ignoreAcceptHeader = false;
 
+	private boolean useJaf = true;
+
 	private ConcurrentMap<String, MediaType> mediaTypes = new ConcurrentHashMap<String, MediaType>();
 
 	private List<View> defaultViews;
@@ -224,6 +227,14 @@ public class ContentNegotiatingViewResolver extends WebApplicationObjectSupport
 		this.defaultContentType = defaultContentType;
 	}
 
+	/**
+	 * Indicates whether to use the Java Activation Framework to map from file extensions to media types.
+	 * <p>Default is {@code true}, i.e. the Java Activation Framework is used.
+	 */
+	public void setUseJaf(boolean useJaf) {
+		this.useJaf = useJaf;
+	}
+
 	/**
 	 * Sets the view resolvers to be wrapped by this view resolver.
 	 * <p>If this property is not set, view resolvers will be detected automatically.
@@ -232,6 +243,7 @@ public class ContentNegotiatingViewResolver extends WebApplicationObjectSupport
 		this.viewResolvers = viewResolvers;
 	}
 
+
 	@Override
 	protected void initServletContext(ServletContext servletContext) {
 		if (this.viewResolvers == null) {
@@ -324,7 +336,7 @@ public class ContentNegotiatingViewResolver extends WebApplicationObjectSupport
 		}
 		extension = extension.toLowerCase(Locale.ENGLISH);
 		MediaType mediaType = this.mediaTypes.get(extension);
-		if (mediaType == null && jafPresent) {
+		if (mediaType == null && useJaf && jafPresent) {
 			mediaType = ActivationMediaTypeFactory.getMediaType(filename);
 			if (mediaType != null) {
 				this.mediaTypes.putIfAbsent(extension, mediaType);

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/view/ContentNegotiatingViewResolverTests.java

@@ -49,14 +49,24 @@ public class ContentNegotiatingViewResolverTests {
 	}
 
 	@Test
-	public void getMediaTypeFromFilename() {
+	public void getMediaTypeFromFilenameMediaTypes() {
-		assertEquals("Invalid content type", new MediaType("text", "html"),
-				viewResolver.getMediaTypeFromFilename("test.html"));
 		viewResolver.setMediaTypes(Collections.singletonMap("HTML", "application/xhtml+xml"));
 		assertEquals("Invalid content type", new MediaType("application", "xhtml+xml"),
 				viewResolver.getMediaTypeFromFilename("test.html"));
 	}
 
+	@Test
+	public void getMediaTypeFromFilenameJaf() {
+		assertEquals("Invalid content type", new MediaType("text", "html"),
+				viewResolver.getMediaTypeFromFilename("test.html"));
+	}
+
+	@Test
+	public void getMediaTypeFromFilenameNoJaf() {
+		viewResolver.setUseJaf(false);
+		assertNull("Invalid content type", viewResolver.getMediaTypeFromFilename("test.html"));
+	}
+
 	@Test
 	public void getMediaTypeFilename() {
 		MockHttpServletRequest request = new MockHttpServletRequest("GET", "/test.html?foo=bar");