From 0f635c32f796501f48c50ae65edbccc19bf87ea6 Mon Sep 17 00:00:00 2001
From: Marcin Grzejszczak <marcin@grzejszczak.pl>
Date: Mon, 16 Sep 2019 08:38:24 +0200
Subject: [PATCH] Added a NPE guard

---
 .../cloud/stream/function/StreamFunctionProperties.java        | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/spring-cloud-stream/src/main/java/org/springframework/cloud/stream/function/StreamFunctionProperties.java b/spring-cloud-stream/src/main/java/org/springframework/cloud/stream/function/StreamFunctionProperties.java
index bc2879207..79130df62 100644
--- a/spring-cloud-stream/src/main/java/org/springframework/cloud/stream/function/StreamFunctionProperties.java
+++ b/spring-cloud-stream/src/main/java/org/springframework/cloud/stream/function/StreamFunctionProperties.java
@@ -73,6 +73,9 @@ public class StreamFunctionProperties {
 	}
 
 	public void setDefinition(String definition) {
+		if (definition == null) {
+			return;
+		}
 		this.composeFrom = definition.startsWith("|");
 		this.composeTo = definition.endsWith("|");
 		this.definition = this.composeFrom ? definition.substring(1)