From 1915192d9aee20d9525c565cb1471627d0632297 Mon Sep 17 00:00:00 2001
From: Arjen Poutsma <apoutsma@vmware.com>
Date: Tue, 4 Aug 2009 12:41:36 +0000
Subject: [PATCH]

---
 .../http/converter/BufferedImageHttpMessageConverter.java     | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/org.springframework.web/src/main/java/org/springframework/http/converter/BufferedImageHttpMessageConverter.java b/org.springframework.web/src/main/java/org/springframework/http/converter/BufferedImageHttpMessageConverter.java
index ceaf7f8ac5..bb170c91fa 100644
--- a/org.springframework.web/src/main/java/org/springframework/http/converter/BufferedImageHttpMessageConverter.java
+++ b/org.springframework.web/src/main/java/org/springframework/http/converter/BufferedImageHttpMessageConverter.java
@@ -187,6 +187,10 @@ public class BufferedImageHttpMessageConverter extends AbstractHttpMessageConver
 				imageWriter.setOutput(imageOutputStream);
 				imageWriter.write(null, new IIOImage(image, null, null), iwp);
 			}
+			else {
+				throw new HttpMessageNotWritableException(
+						"Could not find javax.imageio.ImageWriter for Content-Type [" + contentType + "]");
+			}
 		}
 		finally {
 			if (imageWriter != null) {