From 845532b29df79a6448ff98f6d8df8ce4be4920bc Mon Sep 17 00:00:00 2001
From: bill <bill@ulwil-516-ac-b.libstaff.umn.edu>
Date: Wed, 10 Dec 2014 09:18:57 -0600
Subject: [PATCH] DS-2355 uncaught NPE resulting in loss of statistic

---
 .../java/org/dspace/statistics/util/SpiderDetector.java     | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/dspace-api/src/main/java/org/dspace/statistics/util/SpiderDetector.java b/dspace-api/src/main/java/org/dspace/statistics/util/SpiderDetector.java
index da144cd3f3..4b10a8802b 100644
--- a/dspace-api/src/main/java/org/dspace/statistics/util/SpiderDetector.java
+++ b/dspace-api/src/main/java/org/dspace/statistics/util/SpiderDetector.java
@@ -205,7 +205,8 @@ public class SpiderDetector {
 
             for (Pattern candidate : agents)
             {
-                if (candidate.matcher(agent).find())
+                // prevent matcher() invocation from a null Pattern object
+                if (null != candidate && candidate.matcher(agent).find())
                 {
                     return true;
                 }
@@ -236,7 +237,8 @@ public class SpiderDetector {
 
             for (Pattern candidate : domains)
             {
-                if (candidate.matcher(hostname).find())
+                // prevent matcher() invocation from a null Pattern object
+                if (null != candidate && candidate.matcher(hostname).find())
                 {
                     return true;
                 }