INT-572

org.springframework.integration/src/main/java/org/springframework/integration/transformer/MethodInvokingTransformer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2008 the original author or authors.
+ * Copyright 2002-2009 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.
@@ -49,6 +49,9 @@ public class MethodInvokingTransformer implements Transformer {
 
 	public Message<?> transform(Message<?> message) {
 		Object result = this.invoker.invokeMethod(message);
+		if (result == null) {
+			return null;
+		}
 		if (result instanceof Message) {
 			return (Message<?>) result;
 		}