Index: src/org/openide/filesystems/StreamPool.java
===================================================================
RCS file: /cvs/openide/src/org/openide/filesystems/StreamPool.java,v
retrieving revision 1.5
diff -u -r1.5 StreamPool.java
--- src/org/openide/filesystems/StreamPool.java	22 Apr 2004 23:06:05 -0000	1.5
+++ src/org/openide/filesystems/StreamPool.java	11 Jul 2004 14:58:05 -0000
@@ -51,8 +51,13 @@
      * @param fo FileObject that issues is
      * @param InputStream that should be issued
      * @return subclassed InputStream that is registered as mentioned above */
-    public static synchronized InputStream createInputStream (AbstractFolder fo, InputStream is) {
+    public static synchronized InputStream createInputStream (AbstractFolder fo, InputStream is) throws InterruptedIOException {
         InputStream retVal = new NotifyInputStream (fo, is);
+        
+        if (!get (fo).oStream ().isEmpty ()) {
+            throw new InterruptedIOException ("Cannot read. There is an open output stream for " + fo); // NOI18N
+        }
+        
         get (fo).iStream ().add (retVal);
         get (fo.getFileSystem()).iStream ().add (retVal);
         return retVal;