From 9f082f00fdc833168cf6fcf9257941d7f8035090 Mon Sep 17 00:00:00 2001
From: Jon Brisbin <jbrisbin@vmware.com>
Date: Tue, 22 Jan 2013 10:02:20 -0600
Subject: [PATCH] DATAREST-60 Only set the errback parameter if one is
 configured in the RepositoryRestConfiguration.

---
 .../data/rest/webmvc/AbstractRepositoryRestController.java    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/spring-data-rest-webmvc/src/main/java/org/springframework/data/rest/webmvc/AbstractRepositoryRestController.java b/spring-data-rest-webmvc/src/main/java/org/springframework/data/rest/webmvc/AbstractRepositoryRestController.java
index 3bf7e7224..a8a59620d 100644
--- a/spring-data-rest-webmvc/src/main/java/org/springframework/data/rest/webmvc/AbstractRepositoryRestController.java
+++ b/spring-data-rest-webmvc/src/main/java/org/springframework/data/rest/webmvc/AbstractRepositoryRestController.java
@@ -244,7 +244,9 @@ public class AbstractRepositoryRestController implements ApplicationContextAware
                                                    HttpHeaders headers,
                                                    HttpStatus status) {
     String callback = repoRequest.getRequest().getParameter(config.getJsonpParamName());
-    String errback = repoRequest.getRequest().getParameter(config.getJsonpOnErrParamName());
+    String errback = (null != config.getJsonpOnErrParamName()
+                      ? repoRequest.getRequest().getParameter(config.getJsonpOnErrParamName())
+                      : null);
     ResponseEntity<T> newResponse;
     if(null != headers) {
       newResponse = new ResponseEntity<T>(response, headers, status);