more user friendly exception message

git-svn-id: https://svn.code.sf.net/p/jackcess/code/jackcess/trunk@936 f203690c-595d-4dc9-a70b-905162fa7fd2

diff --git a/src/main/java/com/healthmarketscience/jackcess/impl/DatabaseImpl.java b/src/main/java/com/healthmarketscience/jackcess/impl/DatabaseImpl.java
index b7a9305b4134bdfbb83031e13fea20491a95d894..47acb105ed4f599b71216b8a43f5e4c69e1a133f 100644 (file)
--- a/src/main/java/com/healthmarketscience/jackcess/impl/DatabaseImpl.java
+++ b/src/main/java/com/healthmarketscience/jackcess/impl/DatabaseImpl.java
@@ -378,8 +378,9 @@ public class DatabaseImpl implements Database
         JetFormat jetFormat = JetFormat.getFormat(channel);
 
         if(jetFormat.READ_ONLY) {
-          throw new IOException("jet format '" + jetFormat +
-                                "' does not support writing for " + mdbFile);
+          throw new IOException("file format " + 
+                                jetFormat.getPossibleFileFormats().values() +
+                                " does not support writing for " + mdbFile);
         }
       }