From 8d7ed3549a3e08716394dbb2fb4063146c46b8b1 Mon Sep 17 00:00:00 2001
From: Uwe Schindler <uschindler@apache.org>
Date: Thu, 24 Nov 2011 18:39:44 +0000
Subject: [PATCH] LUCENE-3588: Missed NPE -> AlreadyClosedException in
 getFilePointer

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1205954 13f79535-47bb-0310-9956-ffa450edef68
---
 lucene/src/java/org/apache/lucene/store/MMapDirectory.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lucene/src/java/org/apache/lucene/store/MMapDirectory.java b/lucene/src/java/org/apache/lucene/store/MMapDirectory.java
index 9996151dadb..25696d59a4a 100644
--- a/lucene/src/java/org/apache/lucene/store/MMapDirectory.java
+++ b/lucene/src/java/org/apache/lucene/store/MMapDirectory.java
@@ -372,7 +372,11 @@ public class MMapDirectory extends FSDirectory {
     
     @Override
     public long getFilePointer() {
-      return (((long) curBufIndex) << chunkSizePower) + curBuf.position();
+      try {
+        return (((long) curBufIndex) << chunkSizePower) + curBuf.position();
+      } catch (NullPointerException npe) {
+        throw new AlreadyClosedException("MMapIndexInput already closed: " + this);
+      }
     }
   
     @Override