IO-262 add getter for FileFilter - thanks to Lae

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/io/trunk@1080820 13f79535-47bb-0310-9956-ffa450edef68

Author: Niall Pemberton

src/main/java/org/apache/commons/io/monitor/FileAlterationObserver.java

@@ -223,6 +223,16 @@ public File getDirectory() {
         return rootEntry.getFile();
     }
 
+    /**
+     * Return the fileFilter.
+     *
+     * @return the fileFilter
+     * @since Commons IO 2.1
+     */
+    public FileFilter getFileFilter() {
+        return fileFilter;
+    }
+
     /**
      * Add a file system listener.
      *