From 67a25f2dcedb9dea4df578dc0d36567049e7fb6a Mon Sep 17 00:00:00 2001
From: nlevitt <nlevitt@daa5b2f2-a927-0410-8b2d-f5f262fa301a>
Date: Fri, 4 Dec 2009 00:52:55 +0000
Subject: [PATCH] * CheckpointService.java    
 getAvailableCheckpointDirectories() - avoid NullPointerException when    
 checkpoints dir does not exist

---
 .../java/org/archive/crawler/framework/CheckpointService.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/engine/src/main/java/org/archive/crawler/framework/CheckpointService.java b/engine/src/main/java/org/archive/crawler/framework/CheckpointService.java
index fd1e90da..127be310 100644
--- a/engine/src/main/java/org/archive/crawler/framework/CheckpointService.java
+++ b/engine/src/main/java/org/archive/crawler/framework/CheckpointService.java
@@ -263,7 +263,9 @@ public class CheckpointService implements Lifecycle, ApplicationContextAware {
     @SuppressWarnings("unchecked")
     public File[] getAvailableCheckpointDirectories() {
         File[] dirs = getCheckpointsDir().getFile().listFiles((FileFilter)FileFilterUtils.directoryFileFilter());
-        Arrays.sort(dirs, LastModifiedFileComparator.LASTMODIFIED_REVERSE);
+        if (dirs != null) {
+            Arrays.sort(dirs, LastModifiedFileComparator.LASTMODIFIED_REVERSE);
+        }
         return dirs;
     }