From 602869877ea00258b9ffbf3f460e995bb2a91819 Mon Sep 17 00:00:00 2001
From: Jason Height <jheight@apache.org>
Date: Mon, 28 Aug 2006 03:54:04 +0000
Subject: [PATCH] Bug28755: CellReference will throws IllegalArgumentException
 when an illegal cell reference is provided.

git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@437522 13f79535-47bb-0310-9956-ffa450edef68
---
 src/java/org/apache/poi/hssf/util/CellReference.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/java/org/apache/poi/hssf/util/CellReference.java b/src/java/org/apache/poi/hssf/util/CellReference.java
index 623f8175a..0b29415d9 100644
--- a/src/java/org/apache/poi/hssf/util/CellReference.java
+++ b/src/java/org/apache/poi/hssf/util/CellReference.java
@@ -34,13 +34,17 @@ public class CellReference {
     public CellReference(String cellRef) {
         String[] parts = separateRefParts(cellRef);
         sheetName = parts[0];
-        String ref = parts[1];
+        String ref = parts[1]; 
+        if ((ref == null)||("".equals(ref)))
+        	throw new IllegalArgumentException("Invalid Formula cell reference: '"+cellRef+"'");
         if (ref.charAt(0) == '$') {
             colAbs=true;
             ref=ref.substring(1);
         }
         col = convertColStringToNum(ref);
         ref=parts[2];
+        if ((ref == null)||("".equals(ref)))
+        	throw new IllegalArgumentException("Invalid Formula cell reference: '"+cellRef+"'");
         if (ref.charAt(0) == '$') {
             rowAbs=true;
             ref=ref.substring(1);